/**
*******************************************************************************
* Copyright (C) 1996-2004, International Business Machines Corporation and    *
* others. All Rights Reserved.                                                *
*******************************************************************************
*/

package com.ibm.icu.impl;

import java.io.BufferedInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.util.Locale;

import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.lang.UCharacterCategory;
import com.ibm.icu.lang.UProperty;
import com.ibm.icu.text.BreakIterator;
import com.ibm.icu.text.Normalizer;
import com.ibm.icu.text.UCharacterIterator;
import com.ibm.icu.text.UnicodeSet;
import com.ibm.icu.text.UTF16;
import com.ibm.icu.util.RangeValueIterator;
import com.ibm.icu.util.ULocale;
import com.ibm.icu.util.UResourceBundle;
import com.ibm.icu.util.VersionInfo;

/**
* <p>Internal class used for Unicode character property database.</p>
* <p>This classes store binary data read from uprops.icu. 
* It does not have the capability to parse the data into more high-level 
* information. It only returns bytes of information when required.</p>
* <p>Due to the form most commonly used for retrieval, array of char is used
* to store the binary data.</p>
* <p>UCharacterPropertyDB also contains information on accessing indexes to 
* significant points in the binary data.</p>
* <p>Responsibility for molding the binary data into more meaning form lies on 
* <a href=UCharacter.html>UCharacter</a>.</p>
* @author Syn Wee Quek
* @since release 2.1, february 1st 2002
* @draft 2.1
*/

public final class UCharacterProperty implements Trie.DataManipulate
{
    // public data members -----------------------------------------------
    
    /**
    * Trie data
    */
    public CharTrie m_trie_;    
    /**
     * Optimization
     * CharTrie index array
     */
    public char[] m_trieIndex_;
    /**
     * Optimization
     * CharTrie data array
     */
    public char[] m_trieData_;
    /**
     * Optimization
     * CharTrie data offset
     */
    public int m_trieInitialValue_;
    /**
    * Character property table
    */
    public int m_property_[];
    /**
    * Unicode version
    */
    public VersionInfo m_unicodeVersion_;
    /**
     * Exception indicator for uppercase type
     */
    public static final int EXC_UPPERCASE_ = 0;
    /**
     * Exception indicator for lowercase type
     */
    public static final int EXC_LOWERCASE_ = 1;
    /**
     * Exception indicator for titlecase type
     */
    public static final int EXC_TITLECASE_ = 2;
    /**
     * Exception indicator for digit type
     */
    public static final int EXC_UNUSED_ = 3;
    /**
     * Exception indicator for numeric type
     */
    public static final int EXC_NUMERIC_VALUE_ = 4;
    /**
     * Exception indicator for denominator type
     */
    public static final int EXC_DENOMINATOR_VALUE_ = 5;
    /**
     * Exception indicator for mirror type
     */
    public static final int EXC_MIRROR_MAPPING_ = 6;
    /**
     * Exception indicator for special casing type
     */
    public static final int EXC_SPECIAL_CASING_ = 7;
    /**
     * Exception indicator for case folding type
     */
    public static final int EXC_CASE_FOLDING_ = 8;
    /**
     * EXC_COMBINING_CLASS_ is not found in ICU.
     * Used to retrieve the combining class of the character in the exception
     * value
     */
    public static final int EXC_COMBINING_CLASS_ = 9;
    /**
     * Maximum number of expansion for a case mapping
     */
    public static final int MAX_CASE_MAP_SIZE = 10;                         
    /**
    * Turkish ISO 639 2 character code
    */
    public static final String TURKISH_ = "tr";  
    /**
    * Azerbaijani ISO 639 2 character code
    */
    public static final String AZERBAIJANI_ = "az";    
    /**
    * Lithuanian ISO 639 2 character code
    */
    public static final String LITHUANIAN_ = "lt";                  
    /**
    * Latin capital letter i with dot above
    */ 
    public static final char LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE_ = 0x130;
    /**
    * Latin small letter i with dot above
    */ 
    public static final char LATIN_SMALL_LETTER_DOTLESS_I_ = 0x131;
    /**
    * Latin lowercase i
    */
    public static final char LATIN_SMALL_LETTER_I_ = 0x69;
    /**
    * Character type mask
    */
    public static final int TYPE_MASK = 0x1F; 
    /**
    * Exception test mask
    */
    public static final int EXCEPTION_MASK = 0x20; 
    /**
    * Mirror test mask
    */
    public static final int MIRROR_MASK = 1 << 11;
    
    // public methods ----------------------------------------------------
      
    /**
     * Java friends implementation
     */
    public void setIndexData(CharTrie.FriendAgent friendagent)
    {
        m_trieIndex_ = friendagent.getPrivateIndex();
        m_trieData_ = friendagent.getPrivateData();
        m_trieInitialValue_ = friendagent.getPrivateInitialValue();
    }
    
    /**
    * Called by com.ibm.icu.util.Trie to extract from a lead surrogate's 
    * data the index array offset of the indexes for that lead surrogate.
    * @param value data value for a surrogate from the trie, including the
    *        folding offset
    * @return data offset or 0 if there is no data for the lead surrogate
    */
    public int getFoldingOffset(int value)
    {
        if ((value & SUPPLEMENTARY_FOLD_INDICATOR_MASK_) != 0) {
            return (value & SUPPLEMENTARY_FOLD_OFFSET_MASK_);
        }
        else {
            return 0;
        }
    }
    
    /**
    * Gets the property value at the index.
    * This is optimized.
    * Note this is alittle different from CharTrie the index m_trieData_
    * is never negative.
    * @param ch code point whose property value is to be retrieved
    * @return property value of code point
    */
    public int getProperty(int ch)
    {
        if (ch < UTF16.LEAD_SURROGATE_MIN_VALUE 
            || (ch > UTF16.LEAD_SURROGATE_MAX_VALUE 
                && ch < UTF16.SUPPLEMENTARY_MIN_VALUE)) {
            // BMP codepoint
            // optimized
            try {
                return m_property_[
                    m_trieData_[
                    (m_trieIndex_[ch >> Trie.INDEX_STAGE_1_SHIFT_] 
                          << Trie.INDEX_STAGE_2_SHIFT_)
                    + (ch & Trie.INDEX_STAGE_3_MASK_)]];
            } catch (ArrayIndexOutOfBoundsException e) {
                return m_property_[m_trieInitialValue_];
            }
        }
        if (ch <= UTF16.LEAD_SURROGATE_MAX_VALUE) {
            return m_property_[
                    m_trieData_[
                    (m_trieIndex_[Trie.LEAD_INDEX_OFFSET_ 
                                  + (ch >> Trie.INDEX_STAGE_1_SHIFT_)] 
                          << Trie.INDEX_STAGE_2_SHIFT_)
                    + (ch & Trie.INDEX_STAGE_3_MASK_)]];
        }
        // for optimization
        if (ch <= UTF16.CODEPOINT_MAX_VALUE) {
            // look at the construction of supplementary characters
            // trail forms the ends of it.
            return m_property_[m_trie_.getSurrogateValue(
                                          UTF16.getLeadSurrogate(ch), 
                                          (char)(ch & Trie.SURROGATE_MASK_))];
        }
        // return m_dataOffset_ if there is an error, in this case we return 
        // the default value: m_initialValue_
        // we cannot assume that m_initialValue_ is at offset 0
        // this is for optimization.
        return m_property_[m_trieInitialValue_];
        // return m_property_[m_trie_.getCodePointValue(ch)];
    }
    
    /**
    * Getting the signed numeric value of a character embedded in the property
    * argument
    * @param prop the character
    * @return signed numberic value
    */
    public static int getSignedValue(int prop)
    {
        return (prop >> VALUE_SHIFT_);
    }
      
    /**
    * Getting the exception index for argument property
    * @param prop character property 
    * @return exception index 
    */
    public static int getExceptionIndex(int prop)
    {
        return (prop >> VALUE_SHIFT_) & UNSIGNED_VALUE_MASK_AFTER_SHIFT_;
    }
    
    /**
    * Getting the unsigned numeric value of a character embedded in the property
    * argument
    * @param prop the character
    * @return unsigned numberic value
    */
    ///CLOVER:OFF
    public static int getUnsignedValue(int prop)
    {
        return (prop >> VALUE_SHIFT_) & UNSIGNED_VALUE_MASK_AFTER_SHIFT_;
    }
    ///CLOVER:ON
    
    /**
    * Determines if the exception value passed in has the kind of information
    * which the indicator wants, e.g if the exception value contains the digit
    * value of the character
    * @param index exception index
    * @param indicator type indicator
    * @return true if type value exist
    */
    public boolean hasExceptionValue(int index, int indicator) 
    {
        return (m_exception_[index] & (1 << indicator)) != 0;
    }
      
    /**
    * Gets the exception value for the argument properties, assuming that data 
    * type is available. -1 is returned if data is not available.
    * Different from getException, this function tests if the type data is 
    * available.
    * @param props property value
    * @param etype exception type
    * @return exception data type value at index
    */
    ///CLOVER:OFF
    public int getExceptionValue(int props, int etype)
    {
        int index = getExceptionIndex(props);
        if (hasExceptionValue(index, etype)) {
            // contained in exception data
            // return getException(index, etype);
            if (etype == EXC_COMBINING_CLASS_) {
                return m_exception_[index];
            }
            // contained in the exception digit address
            index = addExceptionOffset(m_exception_[index], etype, ++ index);
            return m_exception_[index];
        }
        return -1;
    }
    ///CLOVER:ON
    
    /**
    * Gets the exception value at the index, assuming that data type is 
    * available. Result is undefined if data is not available. Use 
    * hasExceptionValue() to determine data's availability.
    * @param index 
    * @param etype exception data type
    * @return exception data type value at index
    */
    public int getException(int index, int etype)
    {
        // contained in exception data
        if (etype == EXC_COMBINING_CLASS_) {
            return m_exception_[index];
        }
        // contained in the exception digit address
        index = addExceptionOffset(m_exception_[index], etype, ++ index);
        return m_exception_[index];
    }
    
    /**
    * Gets the folded case value at the index
    * @param index of the case value to be retrieved
    * @return folded case value at index
    */
    /* 
     * Issue for canonical caseless match (UAX #21): 
     * Turkic casefolding (using "T" mappings in CaseFolding.txt) does not preserve 
     * canonical equivalence, unlike default-option casefolding. 
     * For example, I-grave and I + grave fold to strings that are not canonically 
     * equivalent. 
     * For more details, see the comment in unorm_compare() in unorm.cpp 
     * and the intermediate prototype changes for Jitterbug 2021. 
     * (For example, revision 1.104 of uchar.c and 1.4 of CaseFolding.txt.) 
     * 
     * This did not get fixed because it appears that it is not possible to fix 
     * it for uppercase and lowercase characters (I-grave vs. i-grave) 
     * together in a way that they still fold to common result strings. 
     */ 

    public int getFoldCase(int index)
    {
        char single = m_case_[index];
        if (UTF16.LEAD_SURROGATE_MIN_VALUE <= single && 
            single <= UTF16.TRAIL_SURROGATE_MAX_VALUE) {
        // Convert the UTF-16 surrogate pair if necessary.
        // For simplicity in usage, and because the frequency of pairs is low,
        // look both directions.
                  
            if (single <= UTF16.LEAD_SURROGATE_MAX_VALUE) {
                char trail = m_case_[index + 1];
                if (UTF16.LEAD_SURROGATE_MIN_VALUE <= trail && 
                    trail <= UTF16.TRAIL_SURROGATE_MAX_VALUE) {
                    return getRawSupplementary(single, trail);
                }
            } 
            else 
            { 
                char lead = m_case_[index - 1];
                if (UTF16.LEAD_SURROGATE_MIN_VALUE <= lead && 
                    lead <= UTF16.LEAD_SURROGATE_MAX_VALUE) {
                    return getRawSupplementary(lead, single);
                }
            }
        }
        return single;
    }
    
    /**
    * Gets the folded case value at the index
    * @param index of the case value to be retrieved
    * @param count number of characters to retrieve
    * @param str string buffer to which to append the result
    */
    public void getFoldCase(int index, int count, StringBuffer str) 
    {
        // first 2 chars are for the simple mappings
        index += 2;
        while (count > 0) {
            str.append(m_case_[index]);
            index ++;
            count --;
        }
    }
    
    /**
    * Gets the upper case value at the index
    * @param index of the case value to be retrieved
    * @param buffer string buffer to add result to
    */
    public void getUpperCase(int index, StringBuffer buffer)
    {
        int count = m_case_[index];
        // last 5 bits of the first char in m_case_ gives the position of the 
        // alternate uppercase characters
        index += (count & LAST_5_BIT_MASK_) + 1;
        count = (count >> SHIFT_5_) & LAST_5_BIT_MASK_;
                
        for (int j = 0; j < count; j ++) {
            buffer.append(m_case_[index + j]);
        }
    }
    
    /**
    * Gets the upper case value at the index
    * @param index of the case value to be retrieved
    * @param buffer string buffer to add result to
    */
    public void getTitleCase(int index, StringBuffer buffer)
    {
        int count = m_case_[index];
        // last 5 bits of the first char in m_case_ gives the position of the 
        // alternate uppercase characters
        index += (count & LAST_5_BIT_MASK_) + 1 + 
                 ((count >> SHIFT_5_) & LAST_5_BIT_MASK_);
        count = (count >> SHIFT_10_) & LAST_5_BIT_MASK_;
                
        for (int j = 0; j < count; j ++) {
            buffer.append(m_case_[index + j]);
        }
    }
      
    /**
    * Gets the lower case value at the index
    * @param index of the case value to be retrieved
    * @param buffer string buffer to add result to
    */
    public void getLowerCase(int index, StringBuffer buffer)
    {
        int count = m_case_[index] & LAST_5_BIT_MASK_;
        // last 5 bits of the first char in m_case_ gives the size of the 
        // lowercase characters
        index ++;
        for (int j = 0; j < count; j ++) {
            buffer.append(m_case_[index + j]);
        }
    }
    
    /**
     * Gets the unicode additional properties.
     * C version getUnicodeProperties.
     * @param codepoint codepoint whose additional properties is to be 
     *                  retrieved
     * @param column
     * @return unicode properties
     */ 
       public int getAdditional(int codepoint, int column) { 
        if (column == -1) {
            return getProperty(codepoint);
        }
           if (column < 0 || column >= m_additionalColumnsCount_) { 
           return 0; 
       } 
       return m_additionalVectors_[
                     m_additionalTrie_.getCodePointValue(codepoint) + column]; 
       } 
       
    static final int MY_MASK = UCharacterProperty.TYPE_MASK
        & ((1<<UCharacterCategory.UPPERCASE_LETTER) |
            (1<<UCharacterCategory.LOWERCASE_LETTER) | 
            (1<<UCharacterCategory.TITLECASE_LETTER) | 
            (1<<UCharacterCategory.MODIFIER_LETTER) |
            (1<<UCharacterCategory.OTHER_LETTER));


       /**
     * <p>Get the "age" of the code point.</p>
     * <p>The "age" is the Unicode version when the code point was first
     * designated (as a non-character or for Private Use) or assigned a 
     * character.</p>
     * <p>This can be useful to avoid emitting code points to receiving 
     * processes that do not accept newer characters.</p>
     * <p>The data is from the UCD file DerivedAge.txt.</p>
     * <p>This API does not check the validity of the codepoint.</p>
     * @param codepoint The code point.
     * @return the Unicode version number
     * @draft ICU 2.1
     */
    public VersionInfo getAge(int codepoint) 
    {
        int version = getAdditional(codepoint, 0) >> AGE_SHIFT_;
        return VersionInfo.getInstance(
                           (version >> FIRST_NIBBLE_SHIFT_) & LAST_NIBBLE_MASK_,
                           version & LAST_NIBBLE_MASK_, 0, 0);
    }
    private static final long UNSIGNED_INT_MASK = 0xffffffffL;
    private static final class BinaryProperties{ 
       int column; 
       long mask; 
       public BinaryProperties(int column,long mask){
               this.column = column;
               this.mask  = mask;
       }
   } 
   BinaryProperties[] binProps={ 
       /* 
        * column and mask values for binary properties from u_getUnicodeProperties(). 
        * Must be in order of corresponding UProperty, 
        * and there must be exacly one entry per binary UProperty. 
        */ 
       new BinaryProperties(  1, (  1 << ALPHABETIC_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << ASCII_HEX_DIGIT_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << BIDI_CONTROL_PROPERTY_) ), 
       new BinaryProperties( -1, (  1 << MIRROR_SHIFT_) ), 
       new BinaryProperties(  1, (  1 << DASH_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << DEFAULT_IGNORABLE_CODE_POINT_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << DEPRECATED_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << DIACRITIC_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << EXTENDER_PROPERTY_) ), 
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_FULL_COMPOSITION_EXCLUSION */ 
       new BinaryProperties(  1, (  1 << GRAPHEME_BASE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << GRAPHEME_EXTEND_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << GRAPHEME_LINK_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << HEX_DIGIT_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << HYPHEN_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << ID_CONTINUE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << ID_START_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << IDEOGRAPHIC_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << IDS_BINARY_OPERATOR_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << IDS_TRINARY_OPERATOR_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << JOIN_CONTROL_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << LOGICAL_ORDER_EXCEPTION_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << LOWERCASE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << MATH_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << NONCHARACTER_CODE_POINT_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << QUOTATION_MARK_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << RADICAL_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << SOFT_DOTTED_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << TERMINAL_PUNCTUATION_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << UNIFIED_IDEOGRAPH_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << UPPERCASE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << WHITE_SPACE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << XID_CONTINUE_PROPERTY_) ), 
       new BinaryProperties(  1, (  1 << XID_START_PROPERTY_) ), 
       new BinaryProperties( -1, (  1 << CASE_SENSITIVE_SHIFT_) ), 
       new BinaryProperties(  2, (  1 << V2_S_TERM_PROPERTY_) ),
       new BinaryProperties(  2, (  1 << V2_VARIATION_SELECTOR_PROPERTY_) ),
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_NFD_INERT */
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_NFKD_INERT */
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_NFC_INERT */
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_NFKC_INERT */
       new BinaryProperties(  0, 0 ),                                  /* UCHAR_SEGMENT_STARTER */
   }; 


    /**
     * <p>Check a binary Unicode property for a code point.</p> 
     * <p>Unicode, especially in version 3.2, defines many more properties 
     * than the original set in UnicodeData.txt.</p>
     * <p>This API is intended to reflect Unicode properties as defined in 
     * the Unicode Character Database (UCD) and Unicode Technical Reports 
     * (UTR).</p>
     * <p>For details about the properties see 
     * <a href=http://www.unicode.org/>http://www.unicode.org/</a>.</p>
     * <p>For names of Unicode properties see the UCD file 
     * PropertyAliases.txt.</p>
     * <p>This API does not check the validity of the codepoint.</p>
     * <p>Important: If ICU is built with UCD files from Unicode versions 
     * below 3.2, then properties marked with "new" are not or 
     * not fully available.</p>
     * @param codepoint Code point to test.
     * @param property selector constant from com.ibm.icu.lang.UProperty, 
     *        identifies which binary property to check.
     * @return true or false according to the binary Unicode property value 
     *         for ch. Also false if property is out of bounds or if the 
     *         Unicode version does not have data for the property at all, or 
     *         not for this code point.
     * @see com.ibm.icu.lang.UProperty
     * @draft ICU 2.1
     */

    public boolean hasBinaryProperty(int codepoint, int property) 
    {
         if(property <UProperty.BINARY_START || UProperty.BINARY_LIMIT<=property) {
            // not a known binary property 
            return false;
        } else {
            long mask=binProps[property].mask;
            if(mask!=0) {
                // systematic, directly stored properties 
                return ((UNSIGNED_INT_MASK & getAdditional(codepoint, binProps[property].column)) & mask)!=0;
            } else {
                /* normalization properties from unorm.icu */
                switch(property) {
                case UProperty.FULL_COMPOSITION_EXCLUSION:
                    return NormalizerImpl.isFullCompositionExclusion(codepoint);
                case UProperty.NFD_INERT:
                    return Normalizer.isNFSkippable(codepoint, Normalizer.NFD);
                case UProperty.NFKD_INERT:
                    return Normalizer.isNFSkippable(codepoint, Normalizer.NFKD);
                case UProperty.NFC_INERT:
                    return Normalizer.isNFSkippable(codepoint, Normalizer.NFC);
                case UProperty.NFKC_INERT:
                    return Normalizer.isNFSkippable(codepoint, Normalizer.NFKC);
                case UProperty.SEGMENT_STARTER:
                    return NormalizerImpl.isCanonSafeStart(codepoint);
                default:
                    break;
                }
            }
        }
        return false;
    }
    
    /**
    * Forms a supplementary code point from the argument character<br>
    * Note this is for internal use hence no checks for the validity of the
    * surrogate characters are done
    * @param lead lead surrogate character
    * @param trail trailing surrogate character
    * @return code point of the supplementary character
    */
    public static int getRawSupplementary(char lead, char trail)
    {
        return (lead << LEAD_SURROGATE_SHIFT_) + trail + SURROGATE_OFFSET_;
    }
    
    /**
    * Loads the property data and initialize the UCharacterProperty instance. 
    * @throws RuntimeException when data is missing or data has been corrupted
    */    
    public static UCharacterProperty getInstance() throws RuntimeException
    {
        if (INSTANCE_ == null) {
            try {
                INSTANCE_ = new UCharacterProperty();
            }
            catch (Exception e) {
                throw new RuntimeException(e.getMessage());
            }
        }
        return INSTANCE_;
    }
        
    /**
    * Special casing lowercase management
    * @param locale current locale
    * @param ch code point to convert
    * @param index of exception containing special case information
    * @param uchariter text iterator with index at position of ch
    * @param buffer to add lowercase
    * @return size of the lower case character in UTF16 format
    */
    public int getSpecialLowerCase(ULocale locale, int index, int ch, 
                                   UCharacterIterator uchariter,
                                   StringBuffer buffer)
    {
        int exception = getException(index, 
                                     UCharacterProperty.EXC_SPECIAL_CASING_);
        if (exception < 0) {
            int offset = uchariter.getIndex();
            // fill u and i with the case mapping result string
            // use hardcoded conditions and mappings
            // Test for conditional mappings first
            // (otherwise the unconditional default mappings are always taken),
            // then test for characters that have unconditional mappings in 
            // SpecialCasing.txt, then get the UnicodeData.txt mappings.
            if (locale.getLanguage().equals(LITHUANIAN_) &&
                // base characters, find accents above
                (((ch == LATIN_CAPITAL_LETTER_I_ || 
                   ch == LATIN_CAPITAL_LETTER_J_ ||
                   ch == LATIN_CAPITAL_I_WITH_OGONEK_) &&
                  isFollowedByMOREABOVE(uchariter, offset)) ||
                  // precomposed with accent above, no need to find one
                  (ch == LATIN_CAPITAL_I_WITH_GRAVE_ || 
                   ch == LATIN_CAPITAL_I_WITH_ACUTE_ || 
                   ch == LATIN_CAPITAL_I_WITH_TILDE_))) {
                   // lithuanian: add a dot above if there are more accents 
                   // above (to always have the dot)
                   // # Lithuanian
                   // # Lithuanian retains the dot in a lowercase i when 
                   //   followed by accents.
                   // # Introduce an explicit dot above when lowercasing 
                   // capital I's and J's
                   // whenever there are more accents above.
                   // (of the accents used in Lithuanian: grave, acute, tilde 
                   // above, and ogonek)
                   // 0049; 0069 0307; 0049; 0049; lt More_Above; 
                   // # LATIN CAPITAL LETTER I
                   // 004A; 006A 0307; 004A; 004A; lt More_Above; 
                   // # LATIN CAPITAL LETTER J
                   // 012E; 012F 0307; 012E; 012E; lt More_Above; 
                   // # LATIN CAPITAL LETTER I WITH OGONEK
                   // 00CC; 0069 0307 0300; 00CC; 00CC; lt; 
                   // # LATIN CAPITAL LETTER I WITH GRAVE
                   // 00CD; 0069 0307 0301; 00CD; 00CD; lt; 
                   // # LATIN CAPITAL LETTER I WITH ACUTE
                   // 0128; 0069 0307 0303; 0128; 0128; lt; 
                   // # LATIN CAPITAL LETTER I WITH TILDE
                   switch(ch) {
                   case LATIN_CAPITAL_LETTER_I_: 
                        buffer.append((char)LATIN_SMALL_LETTER_I_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        return 2;
                   case LATIN_CAPITAL_LETTER_J_: 
                        buffer.append((char)LATIN_SMALL_LETTER_J_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        return 2;
                   case LATIN_CAPITAL_I_WITH_OGONEK_:
                        buffer.append((char)LATIN_SMALL_LETTER_I_WITH_OGONEK_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        return 2;
                   case LATIN_CAPITAL_I_WITH_GRAVE_: 
                        buffer.append((char)LATIN_SMALL_LETTER_I_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        buffer.append((char)COMBINING_GRAVE_ACCENT_);
                        return 3;
                   case LATIN_CAPITAL_I_WITH_ACUTE_: 
                        buffer.append((char)LATIN_SMALL_LETTER_I_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        buffer.append((char)COMBINING_ACUTE_ACCENT_);
                        return 3;
                   case LATIN_CAPITAL_I_WITH_TILDE_:
                        buffer.append((char)LATIN_SMALL_LETTER_I_);
                        buffer.append((char)COMBINING_DOT_ABOVE_);
                        buffer.append((char)COMBINING_TILDE_);
                        return 3;
                   }
            } 
            
            String language = locale.getLanguage();
            if (language.equals(TURKISH_) || language.equals(AZERBAIJANI_)) { 
                if (ch == 0x130) {
                    // # I and i-dotless; I-dot and i are case pairs in Turkish 
                    // and Azeri
                    // # The following rules handle those cases.
                    // 0130; 0069; 0130; 0130; tr 
                    // # LATIN CAPITAL LETTER I WITH DOT ABOVE
                    // 0130; 0069; 0130; 0130; az 
                    // # LATIN CAPITAL LETTER I WITH DOT ABOVE
                    buffer.append(LATIN_SMALL_LETTER_I_);
                    return 1;
                } 
                if (ch == 0x307 && isPrecededByI(uchariter, offset)) {
                    // ### TODO see comment above about isAfter_I()
                    // # When lowercasing, remove dot_above in the sequence 
                    // I + dot_above, which will turn into i.
                    // # This matches the behavior of the canonically
                    // equivalent I-dot_above
                    // 0307; ; 0307; 0307; tr After_I; # COMBINING DOT ABOVE
                    // 0307; ; 0307; 0307; az After_I; # COMBINING DOT ABOVE
                    return 0; // remove the dot (continue without output)

                }
                if (ch == LATIN_CAPITAL_LETTER_I_ && 
                    !isFollowedByDotAbove(uchariter, offset)) {
                    // turkish: I maps to dotless i
                    // other languages or turkish with decomposed I+dot above: 
                    // I maps to i
                    // # When lowercasing, unless an I is before a dot_above, 
                    // it turns into a dotless i.
                    //  0049; 0131; 0049; 0049; tr Not_Before_Dot; 
                    // # LATIN CAPITAL LETTER I
                    // 0049; 0131; 0049; 0049; az Not_Before_Dot; 
                    // # LATIN CAPITAL LETTER I
                    buffer.append(LATIN_SMALL_LETTER_DOTLESS_I_);
                    return 1;
                }
            } 
            
            if (ch == 0x130) {
                // decomposed I+dot above becomes i (see handling of 
                // U+0049 for turkish) and removes the dot above
                // # Preserve canonical equivalence for I with dot. Turkic is 
                // handled below.
                // 0130; 0069 0307; 0130; 0130; 
                // # LATIN CAPITAL LETTER I WITH DOT ABOVE
                buffer.append(LATIN_SMALL_LETTER_I_);
                buffer.append(COMBINING_DOT_ABOVE_);
                return 2; // remove the dot (continue without output)
            } 
            
            if (ch == GREEK_CAPITAL_LETTER_SIGMA_ && 
                isCFINAL(uchariter, offset) && 
                isNotCINITIAL(uchariter, offset)) {
                // greek capital sigma maps depending on surrounding cased 
                // letters
                // greek capital sigma maps depending on surrounding cased 
                // letters (see SpecialCasing.txt) */
                // # Special case for final form of sigma
                // 03A3; 03C2; 03A3; 03A3; Final_Sigma; 
                // # GREEK CAPITAL LETTER SIGMA
                buffer.append(GREEK_SMALL_LETTER_RHO_);
                return 1;
            } 
            
            // no known conditional special case mapping, use a normal mapping
            if (hasExceptionValue(index, UCharacterProperty.EXC_LOWERCASE_)) {
                int oldlength = buffer.length();
                UTF16.append(buffer, getException(index, 
                                            UCharacterProperty.EXC_LOWERCASE_)); 
                return buffer.length() - oldlength;                            
            }
            
            UTF16.append(buffer, ch);
            return UTF16.getCharCount(ch);
        }
        else {
            // get the special case mapping string from the data file
            index = exception & LAST_CHAR_MASK_;
            int oldlength = buffer.length();
            getLowerCase(index, buffer);
            return buffer.length() - oldlength;
        }
    }
    
    /**
     * Gets the lower case map of the argument codepoint
     * @param locale locale which the lowercase is looked for
     * @param ch codepoint whose lower case is to be matched
     * @param uchariter text iterator positioned at the codepoint ch
     * @param buffer buffer to store result string
     * @return size of the lowercased codepoint in UTF16 format
     */
    public int toLowerCase(ULocale locale, int ch, 
			   UCharacterIterator uchariter, 
			   StringBuffer buffer)
    {
        int props = getProperty(ch);
        if ((props & EXCEPTION_MASK) == 0) {
            int type = props & TYPE_MASK;
            if (type == UCharacterCategory.UPPERCASE_LETTER ||
                type == UCharacterCategory.TITLECASE_LETTER) {
                ch += UCharacterProperty.getSignedValue(props);
            }
        } else {
            int index = UCharacterProperty.getExceptionIndex(props);
            if (hasExceptionValue(index, 
                                UCharacterProperty.EXC_SPECIAL_CASING_)) {
                return getSpecialLowerCase(locale, index, ch, uchariter, 
                                           buffer);
            } 
            if (hasExceptionValue(index, 
                                       UCharacterProperty.EXC_LOWERCASE_)) {
                ch = getException(index, UCharacterProperty.EXC_LOWERCASE_);
            }
        }
        UTF16.append(buffer, ch);
        return UTF16.getCharCount(ch);
    }

    /**
     * Gets the lower case map of the argument codepoint
     * @param locale locale which the lowercase is looked for
     * @param ch codepoint whose lower case is to be matched
     * @param uchariter text iterator positioned at the codepoint ch
     * @param buffer array in which to store the result
     * @return size oflowercased codepoint in UTF16 format
     */
    public int toLowerCase(ULocale locale, int ch, 
                           UCharacterIterator uchariter, char buffer[])
    {
        int props = getProperty(ch);
        if ((props & EXCEPTION_MASK) == 0) {
            int type = props & TYPE_MASK;
            if (type == UCharacterCategory.UPPERCASE_LETTER ||
                type == UCharacterCategory.TITLECASE_LETTER) {
                ch += UCharacterProperty.getSignedValue(props);
            }
        } else {
            int index = UCharacterProperty.getExceptionIndex(props);
            if (hasExceptionValue(index, 
                                  UCharacterProperty.EXC_SPECIAL_CASING_)) {
                StringBuffer strbuffer = new StringBuffer(1);
                int result = getSpecialLowerCase(locale, index, ch, uchariter, 
                                                 strbuffer);
                strbuffer.getChars(0, result, buffer, 0);
                return result;
            } 
            if (hasExceptionValue(index, UCharacterProperty.EXC_LOWERCASE_)) {
                ch = getException(index, UCharacterProperty.EXC_LOWERCASE_);
            }
        }
        if (ch < UTF16.SUPPLEMENTARY_MIN_VALUE) {
            buffer[0] = (char)ch;
            return 1;
        }
        buffer[0] = UTF16.getLeadSurrogate(ch);
        buffer[1] = UTF16.getTrailSurrogate(ch);
        return 2;
    }
    
    /**
     * Gets the lower case mappings of the substring from index start to the
     * character before end.
     * @param locale locale which the mappings will be searched
     * @param str string to map 
     * @param start start index of the substring to map
     * @param limit one index pass the last character to map
     * @param result string buffer to store lower case string
     */
    public void toLowerCase(ULocale locale, String str, int start, int limit, 
                            StringBuffer result) 
    {
        UCharacterIterator ucharIter = UCharacterIterator.getInstance(str);
        int                strIndex  = start;
        
        while (strIndex < limit) { 
            ucharIter.setIndex(strIndex);
            int ch = ucharIter.currentCodePoint();
            
            toLowerCase(locale, ch, ucharIter, result);
            strIndex ++;
            if (ch >= UTF16.SUPPLEMENTARY_MIN_VALUE) {
                strIndex ++;
            }
        }
    }
    
    /**
    * Special casing uppercase management
    * @param locale locale which the mappings will be based on
    * @param index of exception containing special case information
    * @param ch code point to convert
    * @param uchariter text iterator which ch belongs to
    * @param upperflag true if uppercase mapping is desired, false for title 
    *        casing
    * @param buffer to add uppercase
    * @return size of uppercased codepoint in UTF16 format
    */
    public int getSpecialUpperOrTitleCase(ULocale locale, int index, int ch, 
                                          UCharacterIterator uchariter, 
                                          boolean upperflag, 
                                          StringBuffer buffer)
    {
        int exception = getException(index, 
                                     UCharacterProperty.EXC_SPECIAL_CASING_);
        if (exception < 0) {
            String language = locale.getLanguage();
            // use hardcoded conditions and mappings
            if ((language.equals(TURKISH_) || language.equals(AZERBAIJANI_))
                && ch == LATIN_SMALL_LETTER_I_) {
                // turkish: i maps to dotted I
                // # Turkish and Azeri
                // # I and i-dotless; I-dot and i are case pairs in Turkish and Azeri
                // # The following rules handle those cases.
                // # When uppercasing, i turns into a dotted capital I
                // 0069; 0069; 0130; 0130; tr; # LATIN SMALL LETTER I
                // 0069; 0069; 0130; 0130; az; # LATIN SMALL LETTER I
                buffer.append(LATIN_CAPITAL_LETTER_I_WITH_DOT_ABOVE_);
                return 1;
            } 
            
            if (language.equals(LITHUANIAN_) && ch == COMBINING_DOT_ABOVE_ 
                && isPrecededBySoftDotted(uchariter, uchariter.getIndex())) {
                // # Lithuanian
                // # Lithuanian retains the dot in a lowercase i when followed 
                // by accents.
                // # Remove DOT ABOVE after "i" with upper or titlecase
                // 0307; 0307; ; ; lt After_Soft_Dotted; # COMBINING DOT ABOVE
                                // lithuanian: remove DOT ABOVE after U+0069 "i" with 
                // upper or titlecase
                return 0; // remove the dot (continue without output)
            } 
            
            // no known conditional special case mapping, use a normal mapping
           if (!upperflag && hasExceptionValue(index, 
                                          UCharacterProperty.EXC_TITLECASE_)) {
               ch = getException(index, UCharacterProperty.EXC_TITLECASE_);                    
           }
           else {
               if (hasExceptionValue(index, 
                                     UCharacterProperty.EXC_UPPERCASE_)) {
                   ch = getException(index, UCharacterProperty.EXC_UPPERCASE_); 
               }
           }
           
           UTF16.append(buffer, ch);
           return UTF16.getCharCount(ch);
        }
        
        // get the special case mapping string from the data file
        index = exception & LAST_CHAR_MASK_;
        int oldlength = buffer.length();
        if (upperflag) {
            getUpperCase(index, buffer);
        }
        else {
              getTitleCase(index, buffer);
        }
        return buffer.length() - oldlength;
    }
    
    /**
     * Gets the upper or title case map of the codepoint
     * @param locale locale which the mappings will be searched 
     * @param ch codepoint whose upper or title case will be mapped
     * @param uchariter text iterator positioned at the codepoint
     * @param upperflag flag true if uppercase is desired, false for title case
     * @param buffer buffer to store result map
     * @return size of uppercased codepoint in UTF16 format
     */
    public int toUpperOrTitleCase(ULocale locale, int ch, 
                                  UCharacterIterator uchariter, 
                                  boolean upperflag, StringBuffer buffer) 
    {
        int props = getProperty(ch);
        if ((props & EXCEPTION_MASK) == 0) {
            int type = props & TYPE_MASK;
            if (type == UCharacterCategory.LOWERCASE_LETTER) {
                ch -= UCharacterProperty.getSignedValue(props);
            }
        } else {
            int index = UCharacterProperty.getExceptionIndex(props);
            if (hasExceptionValue(index, 
                                  UCharacterProperty.EXC_SPECIAL_CASING_)) {
                return getSpecialUpperOrTitleCase(locale, index, ch, uchariter, 
                                                  upperflag, buffer);
            } 
            if (!upperflag && hasExceptionValue(index, 
                                         UCharacterProperty.EXC_TITLECASE_)) {
                ch = getException(index, UCharacterProperty.EXC_TITLECASE_);
            }
            else {
                 if (hasExceptionValue(index, 
                                      UCharacterProperty.EXC_UPPERCASE_)) {
                    ch = getException(index, 
                                      UCharacterProperty.EXC_UPPERCASE_);
                }
            }
        }
        UTF16.append(buffer, ch);
        return UTF16.getCharCount(ch);
    }
    
    /**
     * Gets the upper or title case map of the codepoint
     * @param locale locale which the mappings will be searched 
     * @param ch codepoint whose upper or title case will be mapped
     * @param uchariter text iterator positioned at the codepoint
     * @param upperflag flag true if uppercase is desired, false for title case
     * @param buffer buffer to store result map
     * @return size of uppercased codepoint in UTF16 format
     */
    public int toUpperOrTitleCase(ULocale locale, int ch, 
                                  UCharacterIterator uchariter, 
                                  boolean upperflag, char buffer[]) 
    {
        int props = getProperty(ch);
        if ((props & EXCEPTION_MASK) == 0) {
            int type = props & TYPE_MASK;
            if (type == UCharacterCategory.LOWERCASE_LETTER) {
                ch -= UCharacterProperty.getSignedValue(props);
            }
        } else {
            int index = UCharacterProperty.getExceptionIndex(props);
            if (hasExceptionValue(index, 
                                  UCharacterProperty.EXC_SPECIAL_CASING_)) {
                   StringBuffer strbuffer = new StringBuffer(1);
                int result = getSpecialUpperOrTitleCase(locale, index, ch, 
                                                        uchariter, upperflag, 
                                                        strbuffer);
                strbuffer.getChars(0, result, buffer, 0);
                return result;
            } 
            if (!upperflag && hasExceptionValue(index, 
                                         UCharacterProperty.EXC_TITLECASE_)) {
                ch = getException(index, UCharacterProperty.EXC_TITLECASE_);
            }
            else {
                 if (hasExceptionValue(index, 
                                      UCharacterProperty.EXC_UPPERCASE_)) {
                    ch = getException(index, 
                                      UCharacterProperty.EXC_UPPERCASE_);
                }
            }
        }
        if (ch < UTF16.SUPPLEMENTARY_MIN_VALUE) {
            buffer[0] = (char)ch;
            return 1;
        }
        buffer[0] = UTF16.getLeadSurrogate(ch);
        buffer[1] = UTF16.getTrailSurrogate(ch);
        return 2;
    }
    
    /**
     * Gets the uppercasing of the argument string.
     * @param locale locale which the mappings will be searched
     * @param str string to map 
     * @param start start index of the substring to map
     * @param limit one index pass the last character to map
     */
    public String toUpperCase(ULocale locale, String str, int start, int limit) 
    {
        UCharacterIterator ucharIter = UCharacterIterator.getInstance(str);
        int                strIndex  = start;
        StringBuffer       result    = new StringBuffer(limit - start);
        
        while (strIndex < limit) { 
            ucharIter.setIndex(strIndex);
            int ch = ucharIter.currentCodePoint();
            
            toUpperOrTitleCase(locale, ch, ucharIter, true, result);
            strIndex ++;
            if (ch >= UTF16.SUPPLEMENTARY_MIN_VALUE) {
                strIndex ++;
            }
        }
        return result.toString();
    }
    
    /**
    * <p>Gets the titlecase version of the argument string.</p>
    * <p>Position for titlecasing is determined by the argument break 
    * iterator, hence the user can customized his break iterator for 
    * a specialized titlecasing. In this case only the forward iteration 
    * needs to be implemented.
    * If the break iterator passed in is null, the default Unicode algorithm
    * will be used to determine the titlecase positions.
    * </p>
    * <p>Only positions returned by the break iterator will be title cased,
    * character in between the positions will all be in lower case.</p>
    * <p>Casing is dependent on the default locale and context-sensitive</p>
    * @param str source string to be performed on
    * @param breakiter break iterator to determine the positions in which
    *        the character should be title cased.
    * @return lowercase version of the argument string
    */
     public String toTitleCase(ULocale locale, String str, 
                               BreakIterator breakiter)
     {
         UCharacterIterator ucharIter = UCharacterIterator.getInstance(str);
        int                length    = str.length();
        StringBuffer       result    = new StringBuffer();
        
        breakiter.setText(str);
        
        int                index     = breakiter.first();
           // titlecasing loop
        while (index != BreakIterator.DONE && index < length) {
            // titlecase the character at the found index
            int ch = UTF16.charAt(str, index);
            ucharIter.setIndex(index);
            index += UTF16.getCharCount(ch);
            toUpperOrTitleCase(locale, ch, ucharIter, false, result);
            int next = breakiter.next();
            if (index != BreakIterator.DONE && index < next) {
                // lowercase [prev..index]
                toLowerCase(locale, str, index, next, result);
            }
            index = next;
        }
        return result.toString();
     }

    /**
     * <p>
     * Unicode property names and property value names are compared
     * "loosely". Property[Value]Aliases.txt say:
     * <quote>
     *   "With loose matching of property names, the case distinctions, 
     *    whitespace, and '_' are ignored."
     * </quote>
     * </p>
     * <p>
     * This function does just that, for ASCII (char *) name strings.
     * It is almost identical to ucnv_compareNames() but also ignores
     * ASCII White_Space characters (U+0009..U+000d).
     * </p>
     * @param name1 name to compare
     * @param name2 name to compare
     * @return 0 if names are equal, < 0 if name1 is less than name2 and > 0
     *         if name1 is greater than name2.
     */
    /* to be implemented in 2.4
     * public static int comparePropertyNames(String name1, String name2) 
    {
        int result = 0;
        int i1 = 0;
        int i2 = 0;
        while (true) {
            char ch1 = 0;
            char ch2 = 0;
            // Ignore delimiters '-', '_', and ASCII White_Space 
            if (i1 < name1.length()) {
                ch1 = name1.charAt(i1 ++);
            }
            while (ch1 == '-' || ch1 == '_' || ch1 == ' ' || ch1 == '\t' 
                   || ch1 == '\n' // synwee what is || ch1 == '\v'
                   || ch1 == '\f' || ch1=='\r') {
                if (i1 < name1.length()) {
                    ch1 = name1.charAt(i1 ++);
                }
                else {
                    ch1 = 0;
                }
            }
            if (i2 < name2.length()) {
                ch2 = name2.charAt(i2 ++);
            }
            while (ch2 == '-' || ch2 == '_' || ch2 == ' ' || ch2 == '\t' 
                   || ch2 == '\n' // synwee what is || ch1 == '\v' 
                   || ch2 == '\f' || ch2=='\r') {
                if (i2 < name2.length()) {
                    ch2 = name2.charAt(i2 ++);
                }
                else {
                    ch2 = 0;
                }
            }
    
            // If we reach the ends of both strings then they match
            if (ch1 == 0 && ch2 == 0) {
                return 0;
            }
            
            // Case-insensitive comparison
            if (ch1 != ch2) {
                result = Character.toLowerCase(ch1)
                                                - Character.toLowerCase(ch2);
                if (result != 0) {
                    return result;
                }
            }
        }
    }
    */
    
    /**
     * Checks if the argument c is to be treated as a white space in ICU
     * rules. Usually ICU rule white spaces are ignored unless quoted.
     * @param c codepoint to check
     * @return true if c is a ICU white space
     */
    public static boolean isRuleWhiteSpace(int c) 
    {
        /* "white space" in the sense of ICU rule parsers
           This is a FIXED LIST that is NOT DEPENDENT ON UNICODE PROPERTIES.
           See UTR #31: http://www.unicode.org/reports/tr31/.
           U+0009..U+000D, U+0020, U+0085, U+200E..U+200F, and U+2028..U+2029
        */
        return (c >= 0x0009 && c <= 0x2029 &&
                (c <= 0x000D || c == 0x0020 || c == 0x0085 ||
                 c == 0x200E || c == 0x200F || c >= 0x2028));
    }

    /**
     * Get the the maximum values for some enum/int properties.
     * @return maximum values for the integer properties.
     */
    public int getMaxValues(int column) 
    {
       // return m_maxBlockScriptValue_;
        
        switch(column) {
        case 0:
            return m_maxBlockScriptValue_;
        case 2:
            return m_maxJTGValue_;
        default:
            return 0;
        }
    }
    
    /**
     * Gets the type mask
     * @param type character type
     * @return mask
     */
    public static int getMask(int type) 
    {
        return 1 << type;
    }
    
    // protected variables -----------------------------------------------
  
    /**
    * Case table
    */
    char m_case_[];
      
    /**
    * Exception property table
    */
    int m_exception_[];
    /**
     * Extra property trie
     */
    CharTrie m_additionalTrie_;
    /**
     * Extra property vectors, 1st column for age and second for binary 
     * properties.
     */
    int m_additionalVectors_[];
    /**
     * Number of additional columns
     */
    int m_additionalColumnsCount_;
    /**
     * Maximum values for block, bits used as in vector word
     * 0
     */
    int m_maxBlockScriptValue_;
    /**
     * Maximum values for script, bits used as in vector word
     * 0
     */
     int m_maxJTGValue_;   
    // private variables -------------------------------------------------
    
      /**
     * UnicodeData.txt property object
     */
    private static UCharacterProperty INSTANCE_ = null;   
        
    /**
    * Default name of the datafile
    */
    private static final String DATA_FILE_NAME_ = ICUResourceBundle.ICU_BUNDLE+"/uprops.icu";
      
    /**
    * Default buffer size of datafile
    */
    private static final int DATA_BUFFER_SIZE_ = 25000;
      
    /**
    * This, from what i infer is the max size of the indicators used for the
    * exception values.
    * Number of bits in an 8-bit integer value 
    */
    private static final int EXC_GROUP_ = 8;
      
    /**
    * Mask to get the group  
    */
    private static final int EXC_GROUP_MASK_ = 255;
      
    /**
    * Mask to get the digit value in the exception result
    */
    private static final int EXC_DIGIT_MASK_ = 0xFFFF;
      
    /**
    * Offset table for data in exception block.<br>
    * Table formed by the number of bits used for the index, e.g. 0 = 0 bits, 
    * 1 = 1 bits.
    */
    private static final byte FLAGS_OFFSET_[] = 
    {
        0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
        1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
        1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
        1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
        2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
        3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
        3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
        4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
    };
      
    /**
    * Numeric value shift
    */
    private static final int VALUE_SHIFT_ = 20;
      
    /**
    * Mask to be applied after shifting to obtain an unsigned numeric value
    */
    private static final int UNSIGNED_VALUE_MASK_AFTER_SHIFT_ = 0x7FF;
    
    /**
     * Shift to get reserved value
     */
    private static final int RESERVED_SHIFT_ = 15;
    
    /**
     * 
     */
    private static final int BIDI_SHIFT_ = 6;
    /**
     * 
     */
    private static final int MIRROR_SHIFT_ = BIDI_SHIFT_ + 5;
    
    /**
     * 
     */
    private static final int NUMERIC_TYPE_SHIFT = 12;
    /**
     * 
     */
    private static final int CASE_SENSITIVE_SHIFT_= NUMERIC_TYPE_SHIFT+3;
    /**
     * Bit indicating exception
     */
      private static final int EXCEPTION_BIT = 1 << 5;
      
      /** 
       * Bit to get the actual property value
       */
    private static final int VALUE_BITS_ = 0x10000 - VALUE_SHIFT_;

    /**
     * Minimum value of a property
     */
    private static final int MIN_VALUE_ = -(1 << (VALUE_BITS_ - 1));
    
    /**
     * Maximum value of a property
     */
    private static final int MAX_VALUE_ = (1 << (VALUE_BITS_ - 1)) - 1;
    /**
     * Maximum number of exceptions
     */
    private static int MAX_EXCEPTIONS_COUNT_ = 1 << VALUE_BITS_;

    /**
    * To get the last 5 bits out from a data type
    */
    private static final int LAST_5_BIT_MASK_ = 0x1F;
      
    /**
    * Shift 5 bits
    */
    private static final int SHIFT_5_ = 5;
    /**
    * Shift 10 bits
    */
    private static final int SHIFT_10_ = 10;
      
    /**
    * Folding indicator mask
    */
    private static final int SUPPLEMENTARY_FOLD_INDICATOR_MASK_ = 0x8000;
    /**
    * Folding offset mask
    */
    private static final int SUPPLEMENTARY_FOLD_OFFSET_MASK_ = 0x7FFF;
    /**
    * Shift value for lead surrogate to form a supplementary character.
    */
    private static final int LEAD_SURROGATE_SHIFT_ = 10;
    /** 
    * Offset to add to combined surrogate pair to avoid msking.
    */
    private static final int SURROGATE_OFFSET_ = 
                           UTF16.SUPPLEMENTARY_MIN_VALUE - 
                           (UTF16.SURROGATE_MIN_VALUE << 
                           LEAD_SURROGATE_SHIFT_) - 
                           UTF16.TRAIL_SURROGATE_MIN_VALUE;   
    /**
    * Latin uppercase I
    */
    private static final char LATIN_CAPITAL_LETTER_I_ = 0x49;
    /**
    * Combining dot above
    */
    private static final char COMBINING_DOT_ABOVE_ = 0x307;
    /**
    * LATIN SMALL LETTER J
    */
    private static final int LATIN_SMALL_LETTER_J_ = 0x6a;
    /**
    * LATIN SMALL LETTER I WITH OGONEK
    */
    private static final int LATIN_SMALL_LETTER_I_WITH_OGONEK_ = 0x12f;
    /**
    * LATIN SMALL LETTER I WITH TILDE BELOW
    */
    private static final int LATIN_SMALL_LETTER_I_WITH_TILDE_BELOW_ = 0x1e2d;
    /**
    * LATIN SMALL LETTER I WITH DOT BELOW
    */
    private static final int LATIN_SMALL_LETTER_I_WITH_DOT_BELOW_ = 0x1ecb;
    /**
    * Combining class for combining mark above
    */
    private static final int COMBINING_MARK_ABOVE_CLASS_ = 230;
    
    /**
    * LATIN CAPITAL LETTER J
    */
    private static final int LATIN_CAPITAL_LETTER_J_ = 0x4a;
    
    /**
    * LATIN CAPITAL LETTER I WITH OGONEK
    */
    private static final int LATIN_CAPITAL_I_WITH_OGONEK_ = 0x12e;
    /**
    * LATIN CAPITAL LETTER I WITH TILDE
    */
    private static final int LATIN_CAPITAL_I_WITH_TILDE_ = 0x128;
    /**
    * LATIN CAPITAL LETTER I WITH GRAVE
    */
    private static final int LATIN_CAPITAL_I_WITH_GRAVE_ = 0xcc;
    /**
    * LATIN CAPITAL LETTER I WITH ACUTE
    */
    private static final int LATIN_CAPITAL_I_WITH_ACUTE_ = 0xcd;
    /**
    * COMBINING GRAVE ACCENT
    */
    private static final int COMBINING_GRAVE_ACCENT_ = 0x300;
    /**
    * COMBINING ACUTE ACCENT
    */
    private static final int COMBINING_ACUTE_ACCENT_ = 0x301;
    /**
    * COMBINING TILDE
    */
    private static final int COMBINING_TILDE_ = 0x303;
    /**
    * Greek capital letter sigma
    */
    private static final char GREEK_CAPITAL_LETTER_SIGMA_ = 0x3a3;
    /**
    * Greek small letter sigma
    */
    private static final char GREEK_SMALL_LETTER_SIGMA_ = 0x3c3;
    /**
    * Greek small letter rho
    */
    private static final char GREEK_SMALL_LETTER_RHO_ = 0x3c2;
    /**
    * Hyphens
    */
    private static final int HYPHEN_      = 0x2010;
    private static final int SOFT_HYPHEN_ = 0xAD;
    /**
    * To get the last character out from a data type
    */
    private static final int LAST_CHAR_MASK_ = 0xFFFF;
    /**
    * To get the last byte out from a data type
    */
    private static final int LAST_BYTE_MASK_ = 0xFF;
    /**
    * Shift 16 bits
    */
    private static final int SHIFT_16_ = 16;
   
       // additional properties ----------------------------------------------
        
       /**
        * Additional properties used in internal trie data
        */
       /*
     * Properties in vector word 1
     * Each bit encodes one binary property.
     * The following constants represent the bit number, use 1<<UPROPS_XYZ.
     * UPROPS_BINARY_1_TOP<=32!
     *
     * Keep this list of property enums in sync with
     * propListNames[] in icu/source/tools/genprops/props2.c!
     *
     * ICU 2.6/uprops format version 3.2 stores full properties instead of "Other_".
     */
    private static final int WHITE_SPACE_PROPERTY_ = 0;
    private static final int BIDI_CONTROL_PROPERTY_ = 1;
    private static final int JOIN_CONTROL_PROPERTY_ = 2;
    private static final int DASH_PROPERTY_ = 3;
    private static final int HYPHEN_PROPERTY_ = 4;
    private static final int QUOTATION_MARK_PROPERTY_ = 5;
    private static final int TERMINAL_PUNCTUATION_PROPERTY_ = 6;
    private static final int MATH_PROPERTY_ = 7;
    private static final int HEX_DIGIT_PROPERTY_ = 8;
    private static final int ASCII_HEX_DIGIT_PROPERTY_ = 9;
    private static final int ALPHABETIC_PROPERTY_ = 10;
    private static final int IDEOGRAPHIC_PROPERTY_ = 11;
    private static final int DIACRITIC_PROPERTY_ = 12;
    private static final int EXTENDER_PROPERTY_ = 13;
    private static final int LOWERCASE_PROPERTY_ = 14;
    private static final int UPPERCASE_PROPERTY_ = 15;
    private static final int NONCHARACTER_CODE_POINT_PROPERTY_ = 16;
    private static final int GRAPHEME_EXTEND_PROPERTY_ = 17;
    private static final int GRAPHEME_LINK_PROPERTY_ = 18;
    private static final int IDS_BINARY_OPERATOR_PROPERTY_ = 19;
    private static final int IDS_TRINARY_OPERATOR_PROPERTY_ = 20;
    private static final int RADICAL_PROPERTY_ = 21;
    private static final int UNIFIED_IDEOGRAPH_PROPERTY_ = 22;
    private static final int DEFAULT_IGNORABLE_CODE_POINT_PROPERTY_ = 23;
    private static final int DEPRECATED_PROPERTY_ = 24;
    private static final int SOFT_DOTTED_PROPERTY_ = 25;
    private static final int LOGICAL_ORDER_EXCEPTION_PROPERTY_ = 26;
    private static final int XID_START_PROPERTY_ = 27;
    private static final int XID_CONTINUE_PROPERTY_ = 28;
    private static final int ID_START_PROPERTY_    = 29;
    private static final int ID_CONTINUE_PROPERTY_ = 30;
    private static final int GRAPHEME_BASE_PROPERTY_ = 31;
    private static final int BINARY_1_TOP_PROPERTY_ = 32;
    
    /**
     * First nibble shift
     */
    private static final int FIRST_NIBBLE_SHIFT_ = 0x4;
    /**
     * Second nibble mask
     */
    private static final int LAST_NIBBLE_MASK_ = 0xF;
    /**
     * Age value shift
     */
    private static final int AGE_SHIFT_ = 24;

    // boolean properties in vector word 2    
    private static final int V2_S_TERM_PROPERTY_ = 24;
    private static final int V2_VARIATION_SELECTOR_PROPERTY_ = 25;
    
    // private constructors --------------------------------------------------
    
    /**
    * Constructor
    * @exception thrown when data reading fails or data corrupted
    */
    private UCharacterProperty() throws IOException
    {
        // jar access
        InputStream is = ICUData.getRequiredStream(DATA_FILE_NAME_);
        BufferedInputStream b = new BufferedInputStream(is, DATA_BUFFER_SIZE_);
        UCharacterPropertyReader reader = new UCharacterPropertyReader(b);
        reader.read(this);
        b.close();

        m_trie_.putIndexData(this);
    }
                                     
    // private methods -------------------------------------------------------
    
    /*
     * This section contains helper functions that check for conditions
     * in the input text surrounding the current code point
     * according to SpecialCasing.txt.
     *
     * Starting with ICU 2.1, the "surrounding text" is passed in as an 
     * instance of UCharacterIterator to allow the core case mapping functions
     * to be used inside transliterators (using Replaceable instead of String)
     * etc.
     *
     * Each helper function gets the index
     * - after the current code point if it looks at following text
     * - before the current code point if it looks at preceding text
     *
     * Unicode 3.2 UAX 21 "Case Mappings" defines the conditions as follows:
     *
     * Final_Sigma
     *   C is preceded by a sequence consisting of a cased letter and a 
     *   case-ignorable sequence, and C is not followed by a sequence 
     *   consisting of an ignorable sequence and then a cased letter.
     *
     * More_Above
     *   C is followed by one or more characters of combining class 230 (ABOVE)
     *   in the combining character sequence.
     *
     * After_Soft_Dotted
     *   The last preceding character with combining class of zero before C
     *   was Soft_Dotted,
     *   and there is no intervening combining character class 230 (ABOVE).
     *
     * Before_Dot
     *   C is followed by combining dot above (U+0307).
     *   Any sequence of characters with a combining class that is neither 0 
     *   nor 230 may intervene between the current character and the combining 
     *   dot above.
     *
     * The erratum from 2002-10-31 adds the condition
     *
     * After_I
     *   The last preceding base character was an uppercase I, and there is no
     *   intervening combining character class 230 (ABOVE).
     *
     *   (See Jitterbug 2344 and the comments on After_I below.)
     *
     * Helper definitions in Unicode 3.2 UAX 21:
     *
     * D1. A character C is defined to be cased
     *     if it meets any of the following criteria:
     *
     *   - The general category of C is Titlecase Letter (Lt)
     *   - In [CoreProps], C has one of the properties Uppercase, or Lowercase
     *   - Given D = NFD(C), then it is not the case that:
     *     D = UCD_lower(D) = UCD_upper(D) = UCD_title(D)
     *     (This third criterium does not add any characters to the list
     *      for Unicode 3.2. Ignored.)
     *
     * D2. A character C is defined to be case-ignorable
     *     if it meets either of the following criteria:
     *
     *   - The general category of C is
     *     Nonspacing Mark (Mn), or Enclosing Mark (Me), or Format Control (Cf), 
     *     or Letter Modifier (Lm), or Symbol Modifier (Sk)
     *   - C is one of the following characters 
     *     U+0027 APOSTROPHE
     *     U+00AD SOFT HYPHEN (SHY)
     *     U+2019 RIGHT SINGLE QUOTATION MARK
     *            (the preferred character for apostrophe)
     *
     * D3. A case-ignorable sequence is a sequence of
     *     zero or more case-ignorable characters.
     */

    /**
    * Determines if a string at offset is preceded by any soft dotted character
    * with no intervening character with combining class = 230
    * @param uchariter text iterator to be determined
    * @param offset offset in string to check
    * @return true if some characters preceding the offset index belongs to
    *         the set of soft dotted characters with no intervening character
    * @see SpecialCasing.txt
    */
    private boolean isPrecededBySoftDotted(
                                UCharacterIterator uchariter, int offset) 
    {
        uchariter.setIndex(offset);
        
        int ch = uchariter.previousCodePoint();
        
        while (ch != UCharacterIterator.DONE) {
            if (isSoftDotted(ch)) {
                return true; // preceded by TYPE_i
            }
    
            int cc = NormalizerImpl.getCombiningClass(ch);
            if (cc == 0 || cc == COMBINING_MARK_ABOVE_CLASS_) {
                // preceded by different base character not TYPE_i), or 
                // intervening cc == 230
                return false; 
            }
            ch = uchariter.previousCodePoint();
        }

        return false; // not preceded by TYPE_i
    }
    
    /** 
    * Determines if codepoint at offset is not followed by a sequence 
    * consisting of an ignorable sequence and then a cased letter 
    * {Ll, Lu, Lt}.
    * @param uchariter String iterator to determine
    * @param offset codepoint offset in string to check
    * @return false if any character after offset in src is a cased letter
    * @see SpecialCasing.txt
    */
    private boolean isCFINAL(UCharacterIterator uchariter, int offset) 
    {
        // iterator should have been determined to be not null by caller
        uchariter.setIndex(offset);
        uchariter.nextCodePoint(); // rid of current codepoint
        int ch = uchariter.nextCodePoint(); // start checking
        
        while (ch != UCharacterIterator.DONE) {
            int cat = getProperty(ch) & TYPE_MASK;
            if (isCased(ch, cat)) {
                return false; // followed by cased letter
            }
            if (!isCaseIgnorable(ch, cat)) {
                return true; // not ignorable
            }
            ch = uchariter.nextCodePoint();
        }

        return true;
    }

    /**
    * Determines if codepoint at offset is not preceded by a sequence 
    * consisting of a cased letter {Ll, Lu, Lt} and an ignorable sequence. 
    * @param uchariter string iterator to determine
    * @param offset codepoint offset in string to check
    * @return true if any character before index in src is a cased letter
    * @see SpecialCasing.txt
    */
    private boolean isNotCINITIAL(UCharacterIterator uchariter, 
                                         int offset) 
    {
        uchariter.setIndex(offset);
        int ch = uchariter.previousCodePoint();
        
        while (ch != UCharacterIterator.DONE) {
            int cat = getProperty(ch) & TYPE_MASK;
            if (isCased(ch, cat)) {
                return true; // preceded by cased letter
            }
            if (!isCaseIgnorable(ch, cat)) {
                return false; // not ignorable
            }
            ch = uchariter.previousCodePoint();
        }

        return false; 
    }
    
    /**
     * <p>
     * See Jitterbug 2344:
     * The condition After_I for Turkic-lowercasing of U+0307 combining dot 
     * above is checked in ICU 2.0, 2.1, 2.6 but was not in 2.2 & 2.4 because
     * we made those releases compatible with Unicode 3.2 which had not fixed
     * a related but in SpecialCasing.txt.
     * </p>
     * <p>
     * From the Jitterbug 2344 text:
     * ... this bug is listed as a Unicode erratum
     * from 2002-10-31 at http://www.unicode.org/uni2errata/UnicodeErrata.html
     * </p>
     * <quote>
     * There are two errors in SpecialCasing.txt.
     * 1. Missing semicolons on two lines. ... [irrelevant for ICU]
     * 2. An incorrect context definition. Correct as follows:
     * &lt; 0307; ; 0307; 0307; tr After_Soft_Dotted; # COMBINING DOT ABOVE
     * &lt; 0307; ; 0307; 0307; az After_Soft_Dotted; # COMBINING DOT ABOVE
     * ---
     * &gtr; 0307; ; 0307; 0307; tr After_I; # COMBINING DOT ABOVE
     * &gtr; 0307; ; 0307; 0307; az After_I; # COMBINING DOT ABOVE
     * where the context After_I is defined as:
     * The last preceding base character was an uppercase I, and there is no
     * intervening combining character class 230 (ABOVE).
     * </quote>
     * <p>
     * Note that SpecialCasing.txt even in Unicode 3.2 described the condition 
     * as:
     * </p>
     * <p>
     * <ul>
     * <li> When lowercasing, remove dot_above in the sequence I + dot_above, 
     *      which will turn into i.
     * <li> This matches the behavior of the canonically equivalent I-dot_above
     * </ul>
     * See also the description in this place in older versions of uchar.c 
     * (revision 1.100).
     * </p>
     * Markus W. Scherer 2003-feb-15
     */
    
    /** 
     * Is preceded by base character 'I' with no intervening cc=230 ? 
     * @param uchariter string iterator to determine
     * @param offset codepoint offset in string to check
     */
    private boolean isPrecededByI(UCharacterIterator uchariter, int offset) 
    {
        uchariter.setIndex(offset);
        for(;;) {
            int c = uchariter.previousCodePoint();
            if (c < 0) {
                break;
            }
            if (c == LATIN_CAPITAL_LETTER_I_) {
                return true; // preceded by I
            }
    
            int cc = NormalizerImpl.getCombiningClass(c);
            if (cc == 0 || cc == COMBINING_MARK_ABOVE_CLASS_) {
                // preceded by different base character (not I), 
                // or intervening cc==230
                return false; 
            }
        }
    
        return false; // not preceded by I
    }

    /** 
    * Determines if a codepoint at offset in string is followed by one or 
    * more characters of combining class = 230.
    * @param uchariter text iterator to be determined
    * @param offset codepoint offset in string to check
    * @return true if a string at offset is followed by one or more characters 
    *         of combining class = 230.
    * @see SpecialCasing.txt
    */
    private static boolean isFollowedByMOREABOVE(UCharacterIterator uchariter, 
                                                 int offset) 
    {
        uchariter.setIndex(offset);
        uchariter.nextCodePoint(); // rid of current codepoint
        int ch = uchariter.nextCodePoint(); // start checking
        
        while (ch != UCharacterIterator.DONE) {
            int cc = NormalizerImpl.getCombiningClass(ch);
            if (cc == COMBINING_MARK_ABOVE_CLASS_) {
                return true; // at least one cc==230 following 
            }
            if (cc == 0) {
                return false; // next base character, no more cc==230 following
            }
            ch = uchariter.nextCodePoint();
        }

        return false; // no more cc == 230 following
    }

    /** 
    * Determines if a codepoint at offset in string is followed by a dot 
    * above with no characters of combining class == 230 in between 
    * @param uchariter text iterator to be determined
    * @param offset codepoint offset of the character in string to check
    * @return true if a string at offset is followed by oa dot above 
    *         with no characters of combining class == 230 in between
    * @see SpecialCasing.txt
    */
    private static boolean isFollowedByDotAbove(UCharacterIterator uchariter, 
                                                int offset) 
    {
        uchariter.setIndex(offset);
        uchariter.nextCodePoint(); // rid off current character
        int ch = uchariter.nextCodePoint(); // start checking
        
        while (ch != UCharacterIterator.DONE) {
            if (ch == COMBINING_DOT_ABOVE_) {
                return true;
            }
            int cc = NormalizerImpl.getCombiningClass(ch);
            if (cc == 0 || cc == COMBINING_MARK_ABOVE_CLASS_) {
                return false; // next base character or cc==230 in between
            }
            ch = uchariter.nextCodePoint();
        }

        return false; // no dot above following
    }
    
    /**  
    * Checks if the case ignorable
    * @param ch codepoint
    * @param cat category of the argument codepoint
    * @return true if ch is case ignorable.
    */
    private static boolean isCaseIgnorable(int ch, int cat) 
    {
        return cat == UCharacterCategory.NON_SPACING_MARK 
               || cat == UCharacterCategory.ENCLOSING_MARK 
               || cat == UCharacterCategory.FORMAT
               || cat == UCharacterCategory.MODIFIER_LETTER
               || cat == UCharacterCategory.MODIFIER_SYMBOL
               || ch == 0x27 || ch == 0xad || ch == 0x2019;
    }

    /** 
     * Is this a "cased" character? 
     * @param ch codepoint
     * @param cat category of the argument
     * @return true if ch is a cased character
     */
    private boolean isCased(int ch, int cat) 
    {
        // Lt + Uppercase + Lowercase = Lt + Lu + Ll 
        // + Other_Uppercase+Other_Lowercase
            
        boolean result = (cat == UCharacterCategory.TITLECASE_LETTER 
               || cat == UCharacterCategory.UPPERCASE_LETTER
               || cat == UCharacterCategory.LOWERCASE_LETTER);
        if (result) {
            return result;
        } 
        int prop = getAdditional(ch, 1);
        return compareAdditionalType(prop, UPPERCASE_PROPERTY_) 
               || compareAdditionalType(prop, LOWERCASE_PROPERTY_);
    }
    
    /** 
     * Is Soft_Dotted? 
     * @param ch codepoint
     * @return true if ch is soft dotted
     */
    private boolean isSoftDotted(int ch) {
        return compareAdditionalType(getAdditional(ch, 1), 
                                     SOFT_DOTTED_PROPERTY_);
    }
    
    /* Is followed by {case-ignorable}* cased  ? */
    /**
    * Getting the correct address for data in the exception value
    * @param evalue exception value
    * @param indicator type of data to retrieve
    * @param address current address to move from
    * @return the correct address
    */
    private int addExceptionOffset(int evalue, int indicator, int address) 
    { 
        int result = address;
        if (indicator >= EXC_GROUP_) {
        result += FLAGS_OFFSET_[evalue & EXC_GROUP_MASK_]; 
        evalue >>= EXC_GROUP_; 
        indicator -= EXC_GROUP_; 
        }
        int mask = (1 << indicator) - 1;
        result += FLAGS_OFFSET_[evalue & mask]; 
        return result;
    }
    
    /**
     * Compare additional properties to see if it has argument type 
     * @param property 32 bit properties
     * @param type character type
     * @return true if property has type
     */
    private boolean compareAdditionalType(int property, int type) 
    {
        return (property & (1 << type)) != 0;
    }

    
    private static final int TAB     = 0x0009;
    private static final int LF      = 0x000a;
    private static final int FF      = 0x000c;
    private static final int CR      = 0x000d;
    private static final int U_A     = 0x0041;
    private static final int U_Z     = 0x005a;
    private static final int U_a     = 0x0061;
    private static final int U_z     = 0x007a;
    private static final int DEL     = 0x007f;
    private static final int NL      = 0x0085;
    private static final int NBSP    = 0x00a0;
    private static final int CGJ     = 0x034f;
    private static final int FIGURESP= 0x2007;
    private static final int HAIRSP  = 0x200a;
    private static final int ZWNJ    = 0x200c;
    private static final int ZWJ     = 0x200d;
    private static final int RLM     = 0x200f;
    private static final int NNBSP   = 0x202f;
    private static final int WJ      = 0x2060;
    private static final int INHSWAP = 0x206a;
    private static final int NOMDIG  = 0x206f;
    private static final int ZWNBSP  = 0xfeff;
    
    public UnicodeSet addPropertyStarts(UnicodeSet set) {
        int c;
       
        /* add the start code point of each same-value range of each trie */
        //utrie_enum(&normTrie, NULL, _enumPropertyStartsRange, set);
        TrieIterator propsIter = new TrieIterator(m_trie_);
        RangeValueIterator.Element propsResult = new RangeValueIterator.Element();
          while(propsIter.next(propsResult)){
            set.add(propsResult.start);
        }
        //utrie_enum(&propsVectorsTrie, NULL, _enumPropertyStartsRange, set);
        TrieIterator propsVectorsIter = new TrieIterator(m_additionalTrie_);
        RangeValueIterator.Element propsVectorsResult = new RangeValueIterator.Element();
        while(propsVectorsIter.next(propsVectorsResult)){
            set.add(propsVectorsResult.start);
        }
        
        
        /* add code points with hardcoded properties, plus the ones following them */

        /* add for IS_THAT_CONTROL_SPACE() */
        set.add(TAB); /* range TAB..CR */
        set.add(CR+1);
        set.add(0x1c);
        set.add(0x1f+1);
        set.add(NL);
        set.add(NL+1);
    
        /* add for u_isIDIgnorable() what was not added above */
        set.add(DEL); /* range DEL..NBSP-1, NBSP added below */
        set.add(HAIRSP);
        set.add(RLM+1);
        set.add(INHSWAP);
        set.add(NOMDIG+1);
        set.add(ZWNBSP);
        set.add(ZWNBSP+1);
    
        /* add no-break spaces for u_isWhitespace() what was not added above */
        set.add(NBSP);
        set.add(NBSP+1);
        set.add(FIGURESP);
        set.add(FIGURESP+1);
        set.add(NNBSP);
        set.add(NNBSP+1);
    
        /* add for u_charDigitValue() */
        set.add(0x3007);
        set.add(0x3008);
        set.add(0x4e00);
        set.add(0x4e01);
        set.add(0x4e8c);
        set.add(0x4e8d);
        set.add(0x4e09);
        set.add(0x4e0a);
        set.add(0x56db);
        set.add(0x56dc);
        set.add(0x4e94);
        set.add(0x4e95);
        set.add(0x516d);
        set.add(0x516e);
        set.add(0x4e03);
        set.add(0x4e04);
        set.add(0x516b);
        set.add(0x516c);
        set.add(0x4e5d);
        set.add(0x4e5e);
    
        /* add for u_digit() */
        set.add(U_a);
        set.add(U_z+1);
        set.add(U_A);
        set.add(U_Z+1);
    
        /* add for UCHAR_DEFAULT_IGNORABLE_CODE_POINT what was not added above */
        set.add(WJ); /* range WJ..NOMDIG */
        set.add(0xfff0);
        set.add(0xfffb+1);
        set.add(0xe0000);
        set.add(0xe0fff+1);
    
        /* add for UCHAR_GRAPHEME_BASE and others */
        set.add(CGJ);
        set.add(CGJ+1);
    
        /* add for UCHAR_JOINING_TYPE */
        set.add(ZWNJ); /* range ZWNJ..ZWJ */
        set.add(ZWJ+1);
    
        /* add Jamo type boundaries for UCHAR_HANGUL_SYLLABLE_TYPE */
        set.add(0x1100);
        int value= UCharacter.HangulSyllableType.LEADING_JAMO;
        int value2;
        for(c=0x115a; c<=0x115f; ++c) {
            value2= UCharacter.getIntPropertyValue(c, UProperty.HANGUL_SYLLABLE_TYPE);
            if(value!=value2) {
                value=value2;
                set.add(c);
            }
        }
    
        set.add(0x1160);
        value=UCharacter.HangulSyllableType.VOWEL_JAMO;
        for(c=0x11a3; c<=0x11a7; ++c) {
            value2=UCharacter.getIntPropertyValue(c, UProperty.HANGUL_SYLLABLE_TYPE);
            if(value!=value2) {
                value=value2;
                set.add(c);
            }
        }
    
        set.add(0x11a8);
        value=UCharacter.HangulSyllableType.TRAILING_JAMO;
        for(c=0x11fa; c<=0x11ff; ++c) {
            value2=UCharacter.getIntPropertyValue(c, UProperty.HANGUL_SYLLABLE_TYPE);
            if(value!=value2) {
                value=value2;
                set.add(c);
            }
        }
    
    
        /*
         * Omit code points for u_charCellWidth() because
         * - it is deprecated and not a real Unicode property
         * - they are probably already set from the trie enumeration
         */
    
        /*
         * Omit code points with hardcoded specialcasing properties
         * because we do not build property UnicodeSets for them right now.
         */      
        return set; // for chaining
    }
/*----------------------------------------------------------------
 * Inclusions list
 *----------------------------------------------------------------*/

    /*
     * Return a set of characters for property enumeration.
     * The set implicitly contains 0x110000 as well, which is one more than the highest
     * Unicode code point.
     *
     * This set is used as an ordered list - its code points are ordered, and
     * consecutive code points (in Unicode code point order) in the set define a range.
     * For each two consecutive characters (start, limit) in the set,
     * all of the UCD/normalization and related properties for
     * all code points start..limit-1 are all the same,
     * except for character names and ISO comments.
     *
     * All Unicode code points U+0000..U+10ffff are covered by these ranges.
     * The ranges define a partition of the Unicode code space.
     * ICU uses the inclusions set to enumerate properties for generating
     * UnicodeSets containing all code points that have a certain property value.
     *
     * The Inclusion List is generated from the UCD. It is generated
     * by enumerating the data tries, and code points for hardcoded properties
     * are added as well.
     *
     * --------------------------------------------------------------------------
     *
     * The following are ideas for getting properties-unique code point ranges,
     * with possible optimizations beyond the current implementation.
     * These optimizations would require more code and be more fragile.
     * The current implementation generates one single list (set) for all properties.
     *
     * To enumerate properties efficiently, one needs to know ranges of
     * repetitive values, so that the value of only each start code point
     * can be applied to the whole range.
     * This information is in principle available in the uprops.icu/unorm.icu data.
     *
     * There are two obstacles:
     *
     * 1. Some properties are computed from multiple data structures,
     *    making it necessary to get repetitive ranges by intersecting
     *    ranges from multiple tries.
     *
     * 2. It is not economical to write code for getting repetitive ranges
     *    that are precise for each of some 50 properties.
     *
     * Compromise ideas:
     *
     * - Get ranges per trie, not per individual property.
     *   Each range contains the same values for a whole group of properties.
     *   This would generate currently five range sets, two for uprops.icu tries
     *   and three for unorm.icu tries.
     *
     * - Combine sets of ranges for multiple tries to get sufficient sets
     *   for properties, e.g., the uprops.icu main and auxiliary tries
     *   for all non-normalization properties.
     *
     * Ideas for representing ranges and combining them:
     *
     * - A UnicodeSet could hold just the start code points of ranges.
     *   Multiple sets are easily combined by or-ing them together.
     *
     * - Alternatively, a UnicodeSet could hold each even-numbered range.
     *   All ranges could be enumerated by using each start code point
     *   (for the even-numbered ranges) as well as each limit (end+1) code point
     *   (for the odd-numbered ranges).
     *   It should be possible to combine two such sets by xor-ing them,
     *   but no more than two.
     *
     * The second way to represent ranges may(?!) yield smaller UnicodeSet arrays,
     * but the first one is certainly simpler and applicable for combining more than
     * two range sets.
     *
     * It is possible to combine all range sets for all uprops/unorm tries into one
     * set that can be used for all properties.
     * As an optimization, there could be less-combined range sets for certain
     * groups of properties.
     * The relationship of which less-combined range set to use for which property
     * depends on the implementation of the properties and must be hardcoded
     * - somewhat error-prone and higher maintenance but can be tested easily
     * by building property sets "the simple way" in test code.
     *
     * ---
     *
     * Do not use a UnicodeSet pattern because that causes infinite recursion;
     * UnicodeSet depends on the inclusions set.
     */
    public UnicodeSet getInclusions() {
        UnicodeSet set = new UnicodeSet();
        NormalizerImpl.addPropertyStarts(set);
        addPropertyStarts(set);
        return set;
    }

}