| /* |
| ******************************************************************************* |
| * Copyright (C) 1996-2011, International Business Machines Corporation and * |
| * others. All Rights Reserved. * |
| ******************************************************************************* |
| */ |
| package com.ibm.icu.text; |
| |
| import java.text.MessageFormat; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.MissingResourceException; |
| |
| import com.ibm.icu.impl.ICUResourceBundle; |
| import com.ibm.icu.impl.Utility; |
| import com.ibm.icu.impl.UtilityExtensions; |
| import com.ibm.icu.text.RuleBasedTransliterator.Data; |
| import com.ibm.icu.text.TransliteratorIDParser.SingleID; |
| import com.ibm.icu.util.CaseInsensitiveString; |
| import com.ibm.icu.util.ULocale; |
| import com.ibm.icu.util.ULocale.Category; |
| import com.ibm.icu.util.UResourceBundle; |
| |
| /** |
| * <code>Transliterator</code> is an abstract class that transliterates text from one format to another. The most common |
| * kind of transliterator is a script, or alphabet, transliterator. For example, a Russian to Latin transliterator |
| * changes Russian text written in Cyrillic characters to phonetically equivalent Latin characters. It does not |
| * <em>translate</em> Russian to English! Transliteration, unlike translation, operates on characters, without reference |
| * to the meanings of words and sentences. |
| * |
| * <p> |
| * Although script conversion is its most common use, a transliterator can actually perform a more general class of |
| * tasks. In fact, <code>Transliterator</code> defines a very general API which specifies only that a segment of the |
| * input text is replaced by new text. The particulars of this conversion are determined entirely by subclasses of |
| * <code>Transliterator</code>. |
| * |
| * <p> |
| * <b>Transliterators are stateless</b> |
| * |
| * <p> |
| * <code>Transliterator</code> objects are <em>stateless</em>; they retain no information between calls to |
| * <code>transliterate()</code>. As a result, threads may share transliterators without synchronizing them. This might |
| * seem to limit the complexity of the transliteration operation. In practice, subclasses perform complex |
| * transliterations by delaying the replacement of text until it is known that no other replacements are possible. In |
| * other words, although the <code>Transliterator</code> objects are stateless, the source text itself embodies all the |
| * needed information, and delayed operation allows arbitrary complexity. |
| * |
| * <p> |
| * <b>Batch transliteration</b> |
| * |
| * <p> |
| * The simplest way to perform transliteration is all at once, on a string of existing text. This is referred to as |
| * <em>batch</em> transliteration. For example, given a string <code>input</code> and a transliterator <code>t</code>, |
| * the call |
| * |
| * <blockquote><code>String result = t.transliterate(input); |
| * </code></blockquote> |
| * |
| * will transliterate it and return the result. Other methods allow the client to specify a substring to be |
| * transliterated and to use {@link Replaceable} objects instead of strings, in order to preserve out-of-band |
| * information (such as text styles). |
| * |
| * <p> |
| * <b>Keyboard transliteration</b> |
| * |
| * <p> |
| * Somewhat more involved is <em>keyboard</em>, or incremental transliteration. This is the transliteration of text that |
| * is arriving from some source (typically the user's keyboard) one character at a time, or in some other piecemeal |
| * fashion. |
| * |
| * <p> |
| * In keyboard transliteration, a <code>Replaceable</code> buffer stores the text. As text is inserted, as much as |
| * possible is transliterated on the fly. This means a GUI that displays the contents of the buffer may show text being |
| * modified as each new character arrives. |
| * |
| * <p> |
| * Consider the simple <code>RuleBasedTransliterator</code>: |
| * |
| * <blockquote><code> |
| * th>{theta}<br> |
| * t>{tau} |
| * </code></blockquote> |
| * |
| * When the user types 't', nothing will happen, since the transliterator is waiting to see if the next character is |
| * 'h'. To remedy this, we introduce the notion of a cursor, marked by a '|' in the output string: |
| * |
| * <blockquote><code> |
| * t>|{tau}<br> |
| * {tau}h>{theta} |
| * </code></blockquote> |
| * |
| * Now when the user types 't', tau appears, and if the next character is 'h', the tau changes to a theta. This is |
| * accomplished by maintaining a cursor position (independent of the insertion point, and invisible in the GUI) across |
| * calls to <code>transliterate()</code>. Typically, the cursor will be coincident with the insertion point, but in a |
| * case like the one above, it will precede the insertion point. |
| * |
| * <p> |
| * Keyboard transliteration methods maintain a set of three indices that are updated with each call to |
| * <code>transliterate()</code>, including the cursor, start, and limit. These indices are changed by the method, and |
| * they are passed in and out via a Position object. The <code>start</code> index marks the beginning of the substring |
| * that the transliterator will look at. It is advanced as text becomes committed (but it is not the committed index; |
| * that's the <code>cursor</code>). The <code>cursor</code> index, described above, marks the point at which the |
| * transliterator last stopped, either because it reached the end, or because it required more characters to |
| * disambiguate between possible inputs. The <code>cursor</code> can also be explicitly set by rules in a |
| * <code>RuleBasedTransliterator</code>. Any characters before the <code>cursor</code> index are frozen; future keyboard |
| * transliteration calls within this input sequence will not change them. New text is inserted at the <code>limit</code> |
| * index, which marks the end of the substring that the transliterator looks at. |
| * |
| * <p> |
| * Because keyboard transliteration assumes that more characters are to arrive, it is conservative in its operation. It |
| * only transliterates when it can do so unambiguously. Otherwise it waits for more characters to arrive. When the |
| * client code knows that no more characters are forthcoming, perhaps because the user has performed some input |
| * termination operation, then it should call <code>finishTransliteration()</code> to complete any pending |
| * transliterations. |
| * |
| * <p> |
| * <b>Inverses</b> |
| * |
| * <p> |
| * Pairs of transliterators may be inverses of one another. For example, if transliterator <b>A</b> transliterates |
| * characters by incrementing their Unicode value (so "abc" -> "def"), and transliterator <b>B</b> decrements character |
| * values, then <b>A</b> is an inverse of <b>B</b> and vice versa. If we compose <b>A</b> with <b>B</b> in a compound |
| * transliterator, the result is the indentity transliterator, that is, a transliterator that does not change its input |
| * text. |
| * |
| * The <code>Transliterator</code> method <code>getInverse()</code> returns a transliterator's inverse, if one exists, |
| * or <code>null</code> otherwise. However, the result of <code>getInverse()</code> usually will <em>not</em> be a true |
| * mathematical inverse. This is because true inverse transliterators are difficult to formulate. For example, consider |
| * two transliterators: <b>AB</b>, which transliterates the character 'A' to 'B', and <b>BA</b>, which transliterates |
| * 'B' to 'A'. It might seem that these are exact inverses, since |
| * |
| * <blockquote>"A" x <b>AB</b> -> "B"<br> |
| * "B" x <b>BA</b> -> "A"</blockquote> |
| * |
| * where 'x' represents transliteration. However, |
| * |
| * <blockquote>"ABCD" x <b>AB</b> -> "BBCD"<br> |
| * "BBCD" x <b>BA</b> -> "AACD"</blockquote> |
| * |
| * so <b>AB</b> composed with <b>BA</b> is not the identity. Nonetheless, <b>BA</b> may be usefully considered to be |
| * <b>AB</b>'s inverse, and it is on this basis that <b>AB</b><code>.getInverse()</code> could legitimately return |
| * <b>BA</b>. |
| * |
| * <p> |
| * <b>Filtering</b> |
| * <p>Each transliterator has a filter, which restricts changes to those characters selected by the filter. The |
| * filter affects just the characters that are changed -- the characters outside of the filter are still part of the |
| * context for the filter. For example, in the following even though 'x' is filtered out, and doesn't convert to y, it does affect the conversion of 'a'. |
| * |
| * <pre> |
| * String rules = "x > y; x{a} > b; "; |
| * Transliterator tempTrans = Transliterator.createFromRules("temp", rules, Transliterator.FORWARD); |
| * tempTrans.setFilter(new UnicodeSet("[a]")); |
| * String tempResult = tempTrans.transform("xa"); |
| * // results in "xb" |
| *</pre> |
| * <p> |
| * <b>IDs and display names</b> |
| * |
| * <p> |
| * A transliterator is designated by a short identifier string or <em>ID</em>. IDs follow the format |
| * <em>source-destination</em>, where <em>source</em> describes the entity being replaced, and <em>destination</em> |
| * describes the entity replacing <em>source</em>. The entities may be the names of scripts, particular sequences of |
| * characters, or whatever else it is that the transliterator converts to or from. For example, a transliterator from |
| * Russian to Latin might be named "Russian-Latin". A transliterator from keyboard escape sequences to Latin-1 |
| * characters might be named "KeyboardEscape-Latin1". By convention, system entity names are in English, with the |
| * initial letters of words capitalized; user entity names may follow any format so long as they do not contain dashes. |
| * |
| * <p> |
| * In addition to programmatic IDs, transliterator objects have display names for presentation in user interfaces, |
| * returned by {@link #getDisplayName}. |
| * |
| * <p> |
| * <b>Factory methods and registration</b> |
| * |
| * <p> |
| * In general, client code should use the factory method <code>getInstance()</code> to obtain an instance of a |
| * transliterator given its ID. Valid IDs may be enumerated using <code>getAvailableIDs()</code>. Since transliterators |
| * are stateless, multiple calls to <code>getInstance()</code> with the same ID will return the same object. |
| * |
| * <p> |
| * In addition to the system transliterators registered at startup, user transliterators may be registered by calling |
| * <code>registerInstance()</code> at run time. To register a transliterator subclass without instantiating it (until it |
| * is needed), users may call <code>registerClass()</code>. |
| * |
| * <p> |
| * <b>Composed transliterators</b> |
| * |
| * <p> |
| * In addition to built-in system transliterators like "Latin-Greek", there are also built-in <em>composed</em> |
| * transliterators. These are implemented by composing two or more component transliterators. For example, if we have |
| * scripts "A", "B", "C", and "D", and we want to transliterate between all pairs of them, then we need to write 12 |
| * transliterators: "A-B", "A-C", "A-D", "B-A",..., "D-A", "D-B", "D-C". If it is possible to convert all scripts to an |
| * intermediate script "M", then instead of writing 12 rule sets, we only need to write 8: "A~M", "B~M", "C~M", "D~M", |
| * "M~A", "M~B", "M~C", "M~D". (This might not seem like a big win, but it's really 2<em>n</em> vs. <em>n</em> |
| * <sup>2</sup> - <em>n</em>, so as <em>n</em> gets larger the gain becomes significant. With 9 scripts, it's 18 vs. 72 |
| * rule sets, a big difference.) Note the use of "~" rather than "-" for the script separator here; this indicates that |
| * the given transliterator is intended to be composed with others, rather than be used as is. |
| * |
| * <p> |
| * Composed transliterators can be instantiated as usual. For example, the system transliterator "Devanagari-Gujarati" |
| * is a composed transliterator built internally as "Devanagari~InterIndic;InterIndic~Gujarati". When this |
| * transliterator is instantiated, it appears externally to be a standard transliterator (e.g., getID() returns |
| * "Devanagari-Gujarati"). |
| * |
| * <p> |
| * <b>Subclassing</b> |
| * |
| * <p> |
| * Subclasses must implement the abstract method <code>handleTransliterate()</code>. |
| * <p> |
| * Subclasses should override the <code>transliterate()</code> method taking a <code>Replaceable</code> and the |
| * <code>transliterate()</code> method taking a <code>String</code> and <code>StringBuffer</code> if the performance of |
| * these methods can be improved over the performance obtained by the default implementations in this class. |
| * |
| * <p> |
| * Copyright © IBM Corporation 1999. All rights reserved. |
| * |
| * @author Alan Liu |
| * @stable ICU 2.0 |
| */ |
| public abstract class Transliterator implements StringTransform { |
| /** |
| * Direction constant indicating the forward direction in a transliterator, |
| * e.g., the forward rules of a RuleBasedTransliterator. An "A-B" |
| * transliterator transliterates A to B when operating in the forward |
| * direction, and B to A when operating in the reverse direction. |
| * @stable ICU 2.0 |
| */ |
| public static final int FORWARD = 0; |
| |
| /** |
| * Direction constant indicating the reverse direction in a transliterator, |
| * e.g., the reverse rules of a RuleBasedTransliterator. An "A-B" |
| * transliterator transliterates A to B when operating in the forward |
| * direction, and B to A when operating in the reverse direction. |
| * @stable ICU 2.0 |
| */ |
| public static final int REVERSE = 1; |
| |
| /** |
| * Position structure for incremental transliteration. This data |
| * structure defines two substrings of the text being |
| * transliterated. The first region, [contextStart, |
| * contextLimit), defines what characters the transliterator will |
| * read as context. The second region, [start, limit), defines |
| * what characters will actually be transliterated. The second |
| * region should be a subset of the first. |
| * |
| * <p>After a transliteration operation, some of the indices in this |
| * structure will be modified. See the field descriptions for |
| * details. |
| * |
| * <p>contextStart <= start <= limit <= contextLimit |
| * |
| * <p>Note: All index values in this structure must be at code point |
| * boundaries. That is, none of them may occur between two code units |
| * of a surrogate pair. If any index does split a surrogate pair, |
| * results are unspecified. |
| * @stable ICU 2.0 |
| */ |
| public static class Position { |
| |
| /** |
| * Beginning index, inclusive, of the context to be considered for |
| * a transliteration operation. The transliterator will ignore |
| * anything before this index. INPUT/OUTPUT parameter: This parameter |
| * is updated by a transliteration operation to reflect the maximum |
| * amount of antecontext needed by a transliterator. |
| * @stable ICU 2.0 |
| */ |
| public int contextStart; |
| |
| /** |
| * Ending index, exclusive, of the context to be considered for a |
| * transliteration operation. The transliterator will ignore |
| * anything at or after this index. INPUT/OUTPUT parameter: This |
| * parameter is updated to reflect changes in the length of the |
| * text, but points to the same logical position in the text. |
| * @stable ICU 2.0 |
| */ |
| public int contextLimit; |
| |
| /** |
| * Beginning index, inclusive, of the text to be transliteratd. |
| * INPUT/OUTPUT parameter: This parameter is advanced past |
| * characters that have already been transliterated by a |
| * transliteration operation. |
| * @stable ICU 2.0 |
| */ |
| public int start; |
| |
| /** |
| * Ending index, exclusive, of the text to be transliteratd. |
| * INPUT/OUTPUT parameter: This parameter is updated to reflect |
| * changes in the length of the text, but points to the same |
| * logical position in the text. |
| * @stable ICU 2.0 |
| */ |
| public int limit; |
| |
| /** |
| * Constructs a Position object with start, limit, |
| * contextStart, and contextLimit all equal to zero. |
| * @stable ICU 2.0 |
| */ |
| public Position() { |
| this(0, 0, 0, 0); |
| } |
| |
| /** |
| * Constructs a Position object with the given start, |
| * contextStart, and contextLimit. The limit is set to the |
| * contextLimit. |
| * @stable ICU 2.0 |
| */ |
| public Position(int contextStart, int contextLimit, int start) { |
| this(contextStart, contextLimit, start, contextLimit); |
| } |
| |
| /** |
| * Constructs a Position object with the given start, limit, |
| * contextStart, and contextLimit. |
| * @stable ICU 2.0 |
| */ |
| public Position(int contextStart, int contextLimit, |
| int start, int limit) { |
| this.contextStart = contextStart; |
| this.contextLimit = contextLimit; |
| this.start = start; |
| this.limit = limit; |
| } |
| |
| /** |
| * Constructs a Position object that is a copy of another. |
| * @stable ICU 2.6 |
| */ |
| public Position(Position pos) { |
| set(pos); |
| } |
| |
| /** |
| * Copies the indices of this position from another. |
| * @stable ICU 2.6 |
| */ |
| public void set(Position pos) { |
| contextStart = pos.contextStart; |
| contextLimit = pos.contextLimit; |
| start = pos.start; |
| limit = pos.limit; |
| } |
| |
| /** |
| * Returns true if this Position is equal to the given object. |
| * @stable ICU 2.6 |
| */ |
| public boolean equals(Object obj) { |
| if (obj instanceof Position) { |
| Position pos = (Position) obj; |
| return contextStart == pos.contextStart && |
| contextLimit == pos.contextLimit && |
| start == pos.start && |
| limit == pos.limit; |
| } |
| return false; |
| } |
| |
| /** |
| * Mock implementation of hashCode(). This implementation always returns a constant |
| * value. When Java assertion is enabled, this method triggers an assertion failure. |
| * @internal |
| * @deprecated This API is ICU internal only. |
| */ |
| public int hashCode() { |
| assert false : "hashCode not designed"; |
| return 42; |
| } |
| |
| /** |
| * Returns a string representation of this Position. |
| * @stable ICU 2.6 |
| */ |
| public String toString() { |
| return "[cs=" + contextStart |
| + ", s=" + start |
| + ", l=" + limit |
| + ", cl=" + contextLimit |
| + "]"; |
| } |
| |
| /** |
| * Check all bounds. If they are invalid, throw an exception. |
| * @param length the length of the string this object applies to |
| * @exception IllegalArgumentException if any indices are out |
| * of bounds |
| * @stable ICU 2.0 |
| */ |
| public final void validate(int length) { |
| if (contextStart < 0 || |
| start < contextStart || |
| limit < start || |
| contextLimit < limit || |
| length < contextLimit) { |
| throw new IllegalArgumentException("Invalid Position {cs=" + |
| contextStart + ", s=" + |
| start + ", l=" + |
| limit + ", cl=" + |
| contextLimit + "}, len=" + |
| length); |
| } |
| } |
| } |
| |
| /** |
| * Programmatic name, e.g., "Latin-Arabic". |
| */ |
| private String ID; |
| |
| /** |
| * This transliterator's filter. Any character for which |
| * <tt>filter.contains()</tt> returns <tt>false</tt> will not be |
| * altered by this transliterator. If <tt>filter</tt> is |
| * <tt>null</tt> then no filtering is applied. |
| */ |
| private UnicodeSet filter; |
| |
| private int maximumContextLength = 0; |
| |
| /** |
| * System transliterator registry. |
| */ |
| private static TransliteratorRegistry registry; |
| |
| private static Map<CaseInsensitiveString, String> displayNameCache; |
| |
| /** |
| * Prefix for resource bundle key for the display name for a |
| * transliterator. The ID is appended to this to form the key. |
| * The resource bundle value should be a String. |
| */ |
| private static final String RB_DISPLAY_NAME_PREFIX = "%Translit%%"; |
| |
| /** |
| * Prefix for resource bundle key for the display name for a |
| * transliterator SCRIPT. The ID is appended to this to form the key. |
| * The resource bundle value should be a String. |
| */ |
| private static final String RB_SCRIPT_DISPLAY_NAME_PREFIX = "%Translit%"; |
| |
| /** |
| * Resource bundle key for display name pattern. |
| * The resource bundle value should be a String forming a |
| * MessageFormat pattern, e.g.: |
| * "{0,choice,0#|1#{1} Transliterator|2#{1} to {2} Transliterator}". |
| */ |
| private static final String RB_DISPLAY_NAME_PATTERN = "TransliteratorNamePattern"; |
| |
| /** |
| * Delimiter between elements in a compound ID. |
| */ |
| static final char ID_DELIM = ';'; |
| |
| /** |
| * Delimiter before target in an ID. |
| */ |
| static final char ID_SEP = '-'; |
| |
| /** |
| * Delimiter before variant in an ID. |
| */ |
| static final char VARIANT_SEP = '/'; |
| |
| /** |
| * To enable debugging output in the Transliterator component, set |
| * DEBUG to true. |
| * |
| * N.B. Make sure to recompile all of the com.ibm.icu.text package |
| * after changing this. Easiest way to do this is 'ant clean |
| * core' ('ant' will NOT pick up the dependency automatically). |
| * |
| * <<This generates a lot of output.>> |
| */ |
| static final boolean DEBUG = false; |
| |
| /** |
| * Default constructor. |
| * @param ID the string identifier for this transliterator |
| * @param filter the filter. Any character for which |
| * <tt>filter.contains()</tt> returns <tt>false</tt> will not be |
| * altered by this transliterator. If <tt>filter</tt> is |
| * <tt>null</tt> then no filtering is applied. |
| * @stable ICU 2.0 |
| */ |
| protected Transliterator(String ID, UnicodeFilter filter) { |
| if (ID == null) { |
| throw new NullPointerException(); |
| } |
| this.ID = ID; |
| setFilter(filter); |
| } |
| |
| /** |
| * Transliterates a segment of a string, with optional filtering. |
| * |
| * @param text the string to be transliterated |
| * @param start the beginning index, inclusive; <code>0 <= start |
| * <= limit</code>. |
| * @param limit the ending index, exclusive; <code>start <= limit |
| * <= text.length()</code>. |
| * @return The new limit index. The text previously occupying <code>[start, |
| * limit)</code> has been transliterated, possibly to a string of a different |
| * length, at <code>[start, </code><em>new-limit</em><code>)</code>, where |
| * <em>new-limit</em> is the return value. If the input offsets are out of bounds, |
| * the returned value is -1 and the input string remains unchanged. |
| * @stable ICU 2.0 |
| */ |
| public final int transliterate(Replaceable text, int start, int limit) { |
| if (start < 0 || |
| limit < start || |
| text.length() < limit) { |
| return -1; |
| } |
| |
| Position pos = new Position(start, limit, start); |
| filteredTransliterate(text, pos, false, true); |
| return pos.limit; |
| } |
| |
| /** |
| * Transliterates an entire string in place. Convenience method. |
| * @param text the string to be transliterated |
| * @stable ICU 2.0 |
| */ |
| public final void transliterate(Replaceable text) { |
| transliterate(text, 0, text.length()); |
| } |
| |
| /** |
| * Transliterate an entire string and returns the result. Convenience method. |
| * |
| * @param text the string to be transliterated |
| * @return The transliterated text |
| * @stable ICU 2.0 |
| */ |
| public final String transliterate(String text) { |
| ReplaceableString result = new ReplaceableString(text); |
| transliterate(result); |
| return result.toString(); |
| } |
| |
| /** |
| * Transliterates the portion of the text buffer that can be |
| * transliterated unambiguosly after new text has been inserted, |
| * typically as a result of a keyboard event. The new text in |
| * <code>insertion</code> will be inserted into <code>text</code> |
| * at <code>index.contextLimit</code>, advancing |
| * <code>index.contextLimit</code> by <code>insertion.length()</code>. |
| * Then the transliterator will try to transliterate characters of |
| * <code>text</code> between <code>index.start</code> and |
| * <code>index.contextLimit</code>. Characters before |
| * <code>index.start</code> will not be changed. |
| * |
| * <p>Upon return, values in <code>index</code> will be updated. |
| * <code>index.contextStart</code> will be advanced to the first |
| * character that future calls to this method will read. |
| * <code>index.start</code> and <code>index.contextLimit</code> will |
| * be adjusted to delimit the range of text that future calls to |
| * this method may change. |
| * |
| * <p>Typical usage of this method begins with an initial call |
| * with <code>index.contextStart</code> and <code>index.contextLimit</code> |
| * set to indicate the portion of <code>text</code> to be |
| * transliterated, and <code>index.start == index.contextStart</code>. |
| * Thereafter, <code>index</code> can be used without |
| * modification in future calls, provided that all changes to |
| * <code>text</code> are made via this method. |
| * |
| * <p>This method assumes that future calls may be made that will |
| * insert new text into the buffer. As a result, it only performs |
| * unambiguous transliterations. After the last call to this |
| * method, there may be untransliterated text that is waiting for |
| * more input to resolve an ambiguity. In order to perform these |
| * pending transliterations, clients should call {@link |
| * #finishTransliteration} after the last call to this |
| * method has been made. |
| * |
| * @param text the buffer holding transliterated and untransliterated text |
| * @param index the start and limit of the text, the position |
| * of the cursor, and the start and limit of transliteration. |
| * @param insertion text to be inserted and possibly |
| * transliterated into the translation buffer at |
| * <code>index.contextLimit</code>. If <code>null</code> then no text |
| * is inserted. |
| * @see #handleTransliterate |
| * @exception IllegalArgumentException if <code>index</code> |
| * is invalid |
| * @stable ICU 2.0 |
| */ |
| public final void transliterate(Replaceable text, Position index, |
| String insertion) { |
| index.validate(text.length()); |
| |
| // int originalStart = index.contextStart; |
| if (insertion != null) { |
| text.replace(index.limit, index.limit, insertion); |
| index.limit += insertion.length(); |
| index.contextLimit += insertion.length(); |
| } |
| |
| if (index.limit > 0 && |
| UTF16.isLeadSurrogate(text.charAt(index.limit - 1))) { |
| // Oops, there is a dangling lead surrogate in the buffer. |
| // This will break most transliterators, since they will |
| // assume it is part of a pair. Don't transliterate until |
| // more text comes in. |
| return; |
| } |
| |
| filteredTransliterate(text, index, true, true); |
| |
| // TODO |
| // This doesn't work once we add quantifier support. Need to rewrite |
| // this code to support quantifiers and 'use maximum backup <n>;'. |
| // |
| // index.contextStart = Math.max(index.start - getMaximumContextLength(), |
| // originalStart); |
| } |
| |
| /** |
| * Transliterates the portion of the text buffer that can be |
| * transliterated unambiguosly after a new character has been |
| * inserted, typically as a result of a keyboard event. This is a |
| * convenience method; see {@link #transliterate(Replaceable, |
| * Transliterator.Position, String)} for details. |
| * @param text the buffer holding transliterated and |
| * untransliterated text |
| * @param index the start and limit of the text, the position |
| * of the cursor, and the start and limit of transliteration. |
| * @param insertion text to be inserted and possibly |
| * transliterated into the translation buffer at |
| * <code>index.contextLimit</code>. |
| * @see #transliterate(Replaceable, Transliterator.Position, String) |
| * @stable ICU 2.0 |
| */ |
| public final void transliterate(Replaceable text, Position index, |
| int insertion) { |
| transliterate(text, index, UTF16.valueOf(insertion)); |
| } |
| |
| /** |
| * Transliterates the portion of the text buffer that can be |
| * transliterated unambiguosly. This is a convenience method; see |
| * {@link #transliterate(Replaceable, Transliterator.Position, |
| * String)} for details. |
| * @param text the buffer holding transliterated and |
| * untransliterated text |
| * @param index the start and limit of the text, the position |
| * of the cursor, and the start and limit of transliteration. |
| * @see #transliterate(Replaceable, Transliterator.Position, String) |
| * @stable ICU 2.0 |
| */ |
| public final void transliterate(Replaceable text, Position index) { |
| transliterate(text, index, null); |
| } |
| |
| /** |
| * Finishes any pending transliterations that were waiting for |
| * more characters. Clients should call this method as the last |
| * call after a sequence of one or more calls to |
| * <code>transliterate()</code>. |
| * @param text the buffer holding transliterated and |
| * untransliterated text. |
| * @param index the array of indices previously passed to {@link |
| * #transliterate} |
| * @stable ICU 2.0 |
| */ |
| public final void finishTransliteration(Replaceable text, |
| Position index) { |
| index.validate(text.length()); |
| filteredTransliterate(text, index, false, true); |
| } |
| |
| /** |
| * Abstract method that concrete subclasses define to implement |
| * their transliteration algorithm. This method handles both |
| * incremental and non-incremental transliteration. Let |
| * <code>originalStart</code> refer to the value of |
| * <code>pos.start</code> upon entry. |
| * |
| * <ul> |
| * <li>If <code>incremental</code> is false, then this method |
| * should transliterate all characters between |
| * <code>pos.start</code> and <code>pos.limit</code>. Upon return |
| * <code>pos.start</code> must == <code> pos.limit</code>.</li> |
| * |
| * <li>If <code>incremental</code> is true, then this method |
| * should transliterate all characters between |
| * <code>pos.start</code> and <code>pos.limit</code> that can be |
| * unambiguously transliterated, regardless of future insertions |
| * of text at <code>pos.limit</code>. Upon return, |
| * <code>pos.start</code> should be in the range |
| * [<code>originalStart</code>, <code>pos.limit</code>). |
| * <code>pos.start</code> should be positioned such that |
| * characters [<code>originalStart</code>, <code> |
| * pos.start</code>) will not be changed in the future by this |
| * transliterator and characters [<code>pos.start</code>, |
| * <code>pos.limit</code>) are unchanged.</li> |
| * </ul> |
| * |
| * <p>Implementations of this method should also obey the |
| * following invariants:</p> |
| * |
| * <ul> |
| * <li> <code>pos.limit</code> and <code>pos.contextLimit</code> |
| * should be updated to reflect changes in length of the text |
| * between <code>pos.start</code> and <code>pos.limit</code>. The |
| * difference <code> pos.contextLimit - pos.limit</code> should |
| * not change.</li> |
| * |
| * <li><code>pos.contextStart</code> should not change.</li> |
| * |
| * <li>Upon return, neither <code>pos.start</code> nor |
| * <code>pos.limit</code> should be less than |
| * <code>originalStart</code>.</li> |
| * |
| * <li>Text before <code>originalStart</code> and text after |
| * <code>pos.limit</code> should not change.</li> |
| * |
| * <li>Text before <code>pos.contextStart</code> and text after |
| * <code> pos.contextLimit</code> should be ignored.</li> |
| * </ul> |
| * |
| * <p>Subclasses may safely assume that all characters in |
| * [<code>pos.start</code>, <code>pos.limit</code>) are filtered. |
| * In other words, the filter has already been applied by the time |
| * this method is called. See |
| * <code>filteredTransliterate()</code>. |
| * |
| * <p>This method is <b>not</b> for public consumption. Calling |
| * this method directly will transliterate |
| * [<code>pos.start</code>, <code>pos.limit</code>) without |
| * applying the filter. End user code should call <code> |
| * transliterate()</code> instead of this method. Subclass code |
| * should call <code>filteredTransliterate()</code> instead of |
| * this method.<p> |
| * |
| * @param text the buffer holding transliterated and |
| * untransliterated text |
| * |
| * @param pos the indices indicating the start, limit, context |
| * start, and context limit of the text. |
| * |
| * @param incremental if true, assume more text may be inserted at |
| * <code>pos.limit</code> and act accordingly. Otherwise, |
| * transliterate all text between <code>pos.start</code> and |
| * <code>pos.limit</code> and move <code>pos.start</code> up to |
| * <code>pos.limit</code>. |
| * |
| * @see #transliterate |
| * @stable ICU 2.0 |
| */ |
| protected abstract void handleTransliterate(Replaceable text, |
| Position pos, boolean incremental); |
| |
| /** |
| * Top-level transliteration method, handling filtering, incremental and |
| * non-incremental transliteration, and rollback. All transliteration |
| * public API methods eventually call this method with a rollback argument |
| * of TRUE. Other entities may call this method but rollback should be |
| * FALSE. |
| * |
| * <p>If this transliterator has a filter, break up the input text into runs |
| * of unfiltered characters. Pass each run to |
| * <subclass>.handleTransliterate(). |
| * |
| * <p>In incremental mode, if rollback is TRUE, perform a special |
| * incremental procedure in which several passes are made over the input |
| * text, adding one character at a time, and committing successful |
| * transliterations as they occur. Unsuccessful transliterations are rolled |
| * back and retried with additional characters to give correct results. |
| * |
| * @param text the text to be transliterated |
| * @param index the position indices |
| * @param incremental if TRUE, then assume more characters may be inserted |
| * at index.limit, and postpone processing to accomodate future incoming |
| * characters |
| * @param rollback if TRUE and if incremental is TRUE, then perform special |
| * incremental processing, as described above, and undo partial |
| * transliterations where necessary. If incremental is FALSE then this |
| * parameter is ignored. |
| */ |
| private void filteredTransliterate(Replaceable text, |
| Position index, |
| boolean incremental, |
| boolean rollback) { |
| // Short circuit path for transliterators with no filter in |
| // non-incremental mode. |
| if (filter == null && !rollback) { |
| handleTransliterate(text, index, incremental); |
| return; |
| } |
| |
| //---------------------------------------------------------------------- |
| // This method processes text in two groupings: |
| // |
| // RUNS -- A run is a contiguous group of characters which are contained |
| // in the filter for this transliterator (filter.contains(ch) == true). |
| // Text outside of runs may appear as context but it is not modified. |
| // The start and limit Position values are narrowed to each run. |
| // |
| // PASSES (incremental only) -- To make incremental mode work correctly, |
| // each run is broken up into n passes, where n is the length (in code |
| // points) of the run. Each pass contains the first n characters. If a |
| // pass is completely transliterated, it is committed, and further passes |
| // include characters after the committed text. If a pass is blocked, |
| // and does not transliterate completely, then this method rolls back |
| // the changes made during the pass, extends the pass by one code point, |
| // and tries again. |
| //---------------------------------------------------------------------- |
| |
| // globalLimit is the limit value for the entire operation. We |
| // set index.limit to the end of each unfiltered run before |
| // calling handleTransliterate(), so we need to maintain the real |
| // value of index.limit here. After each transliteration, we |
| // update globalLimit for insertions or deletions that have |
| // happened. |
| int globalLimit = index.limit; |
| |
| // If there is a non-null filter, then break the input text up. Say the |
| // input text has the form: |
| // xxxabcxxdefxx |
| // where 'x' represents a filtered character (filter.contains('x') == |
| // false). Then we break this up into: |
| // xxxabc xxdef xx |
| // Each pass through the loop consumes a run of filtered |
| // characters (which are ignored) and a subsequent run of |
| // unfiltered characters (which are transliterated). |
| |
| StringBuffer log = null; |
| if (DEBUG) { |
| log = new StringBuffer(); |
| } |
| |
| for (;;) { |
| |
| if (filter != null) { |
| // Narrow the range to be transliterated to the first run |
| // of unfiltered characters at or after index.start. |
| |
| // Advance past filtered chars |
| int c; |
| while (index.start < globalLimit && |
| !filter.contains(c=text.char32At(index.start))) { |
| index.start += UTF16.getCharCount(c); |
| } |
| |
| // Find the end of this run of unfiltered chars |
| index.limit = index.start; |
| while (index.limit < globalLimit && |
| filter.contains(c=text.char32At(index.limit))) { |
| index.limit += UTF16.getCharCount(c); |
| } |
| } |
| |
| // Check to see if the unfiltered run is empty. This only |
| // happens at the end of the string when all the remaining |
| // characters are filtered. |
| if (index.start == index.limit) { |
| break; |
| } |
| |
| // Is this run incremental? If there is additional |
| // filtered text (if limit < globalLimit) then we pass in |
| // an incremental value of FALSE to force the subclass to |
| // complete the transliteration for this run. |
| boolean isIncrementalRun = |
| (index.limit < globalLimit ? false : incremental); |
| |
| int delta; |
| |
| // Implement rollback. To understand the need for rollback, |
| // consider the following transliterator: |
| // |
| // "t" is "a > A;" |
| // "u" is "A > b;" |
| // "v" is a compound of "t; NFD; u" with a filter [:Ll:] |
| // |
| // Now apply "v" to the input text "a". The result is "b". But if |
| // the transliteration is done incrementally, then the NFD holds |
| // things up after "t" has already transformed "a" to "A". When |
| // finishTransliterate() is called, "A" is _not_ processed because |
| // it gets excluded by the [:Ll:] filter, and the end result is "A" |
| // -- incorrect. The problem is that the filter is applied to a |
| // partially-transliterated result, when we only want it to apply to |
| // input text. Although this example describes a compound |
| // transliterator containing NFD and a specific filter, it can |
| // happen with any transliterator which does a partial |
| // transformation in incremental mode into characters outside its |
| // filter. |
| // |
| // To handle this, when in incremental mode we supply characters to |
| // handleTransliterate() in several passes. Each pass adds one more |
| // input character to the input text. That is, for input "ABCD", we |
| // first try "A", then "AB", then "ABC", and finally "ABCD". If at |
| // any point we block (upon return, start < limit) then we roll |
| // back. If at any point we complete the run (upon return start == |
| // limit) then we commit that run. |
| |
| if (rollback && isIncrementalRun) { |
| |
| if (DEBUG) { |
| log.setLength(0); |
| System.out.println("filteredTransliterate{"+getID()+"}i: IN=" + |
| UtilityExtensions.formatInput(text, index)); |
| } |
| |
| int runStart = index.start; |
| int runLimit = index.limit; |
| int runLength = runLimit - runStart; |
| |
| // Make a rollback copy at the end of the string |
| int rollbackOrigin = text.length(); |
| text.copy(runStart, runLimit, rollbackOrigin); |
| |
| // Variables reflecting the commitment of completely |
| // transliterated text. passStart is the runStart, advanced |
| // past committed text. rollbackStart is the rollbackOrigin, |
| // advanced past rollback text that corresponds to committed |
| // text. |
| int passStart = runStart; |
| int rollbackStart = rollbackOrigin; |
| |
| // The limit for each pass; we advance by one code point with |
| // each iteration. |
| int passLimit = index.start; |
| |
| // Total length, in 16-bit code units, of uncommitted text. |
| // This is the length to be rolled back. |
| int uncommittedLength = 0; |
| |
| // Total delta (change in length) for all passes |
| int totalDelta = 0; |
| |
| // PASS MAIN LOOP -- Start with a single character, and extend |
| // the text by one character at a time. Roll back partial |
| // transliterations and commit complete transliterations. |
| for (;;) { |
| // Length of additional code point, either one or two |
| int charLength = |
| UTF16.getCharCount(text.char32At(passLimit)); |
| passLimit += charLength; |
| if (passLimit > runLimit) { |
| break; |
| } |
| uncommittedLength += charLength; |
| |
| index.limit = passLimit; |
| |
| if (DEBUG) { |
| log.setLength(0); |
| log.append("filteredTransliterate{"+getID()+"}i: "); |
| UtilityExtensions.formatInput(log, text, index); |
| } |
| |
| // Delegate to subclass for actual transliteration. Upon |
| // return, start will be updated to point after the |
| // transliterated text, and limit and contextLimit will be |
| // adjusted for length changes. |
| handleTransliterate(text, index, true); |
| |
| if (DEBUG) { |
| log.append(" => "); |
| UtilityExtensions.formatInput(log, text, index); |
| } |
| |
| delta = index.limit - passLimit; // change in length |
| |
| // We failed to completely transliterate this pass. |
| // Roll back the text. Indices remain unchanged; reset |
| // them where necessary. |
| if (index.start != index.limit) { |
| // Find the rollbackStart, adjusted for length changes |
| // and the deletion of partially transliterated text. |
| int rs = rollbackStart + delta - (index.limit - passStart); |
| |
| // Delete the partially transliterated text |
| text.replace(passStart, index.limit, ""); |
| |
| // Copy the rollback text back |
| text.copy(rs, rs + uncommittedLength, passStart); |
| |
| // Restore indices to their original values |
| index.start = passStart; |
| index.limit = passLimit; |
| index.contextLimit -= delta; |
| |
| if (DEBUG) { |
| log.append(" (ROLLBACK)"); |
| } |
| } |
| |
| // We did completely transliterate this pass. Update the |
| // commit indices to record how far we got. Adjust indices |
| // for length change. |
| else { |
| // Move the pass indices past the committed text. |
| passStart = passLimit = index.start; |
| |
| // Adjust the rollbackStart for length changes and move |
| // it past the committed text. All characters we've |
| // processed to this point are committed now, so zero |
| // out the uncommittedLength. |
| rollbackStart += delta + uncommittedLength; |
| uncommittedLength = 0; |
| |
| // Adjust indices for length changes. |
| runLimit += delta; |
| totalDelta += delta; |
| } |
| |
| if (DEBUG) { |
| System.out.println(Utility.escape(log.toString())); |
| } |
| } |
| |
| // Adjust overall limit and rollbackOrigin for insertions and |
| // deletions. Don't need to worry about contextLimit because |
| // handleTransliterate() maintains that. |
| rollbackOrigin += totalDelta; |
| globalLimit += totalDelta; |
| |
| // Delete the rollback copy |
| text.replace(rollbackOrigin, rollbackOrigin + runLength, ""); |
| |
| // Move start past committed text |
| index.start = passStart; |
| } |
| |
| else { |
| // Delegate to subclass for actual transliteration. |
| if (DEBUG) { |
| log.setLength(0); |
| log.append("filteredTransliterate{"+getID()+"}: "); |
| UtilityExtensions.formatInput(log, text, index); |
| } |
| |
| int limit = index.limit; |
| handleTransliterate(text, index, isIncrementalRun); |
| delta = index.limit - limit; // change in length |
| |
| if (DEBUG) { |
| log.append(" => "); |
| UtilityExtensions.formatInput(log, text, index); |
| } |
| |
| // In a properly written transliterator, start == limit after |
| // handleTransliterate() returns when incremental is false. |
| // Catch cases where the subclass doesn't do this, and throw |
| // an exception. (Just pinning start to limit is a bad idea, |
| // because what's probably happening is that the subclass |
| // isn't transliterating all the way to the end, and it should |
| // in non-incremental mode.) |
| if (!isIncrementalRun && index.start != index.limit) { |
| throw new RuntimeException("ERROR: Incomplete non-incremental transliteration by " + getID()); |
| } |
| |
| // Adjust overall limit for insertions/deletions. Don't need |
| // to worry about contextLimit because handleTransliterate() |
| // maintains that. |
| globalLimit += delta; |
| |
| if (DEBUG) { |
| System.out.println(Utility.escape(log.toString())); |
| } |
| } |
| |
| if (filter == null || isIncrementalRun) { |
| break; |
| } |
| |
| // If we did completely transliterate this |
| // run, then repeat with the next unfiltered run. |
| } |
| |
| // Start is valid where it is. Limit needs to be put back where |
| // it was, modulo adjustments for deletions/insertions. |
| index.limit = globalLimit; |
| |
| if (DEBUG) { |
| System.out.println("filteredTransliterate{"+getID()+"}: OUT=" + |
| UtilityExtensions.formatInput(text, index)); |
| } |
| } |
| |
| /** |
| * Transliterate a substring of text, as specified by index, taking filters |
| * into account. This method is for subclasses that need to delegate to |
| * another transliterator, such as CompoundTransliterator. |
| * @param text the text to be transliterated |
| * @param index the position indices |
| * @param incremental if TRUE, then assume more characters may be inserted |
| * at index.limit, and postpone processing to accomodate future incoming |
| * characters |
| * @stable ICU 2.0 |
| */ |
| public void filteredTransliterate(Replaceable text, |
| Position index, |
| boolean incremental) { |
| filteredTransliterate(text, index, incremental, false); |
| } |
| |
| /** |
| * Returns the length of the longest context required by this transliterator. |
| * This is <em>preceding</em> context. The default value is zero, but |
| * subclasses can change this by calling <code>setMaximumContextLength()</code>. |
| * For example, if a transliterator translates "ddd" (where |
| * d is any digit) to "555" when preceded by "(ddd)", then the preceding |
| * context length is 5, the length of "(ddd)". |
| * |
| * @return The maximum number of preceding context characters this |
| * transliterator needs to examine |
| * @stable ICU 2.0 |
| */ |
| public final int getMaximumContextLength() { |
| return maximumContextLength; |
| } |
| |
| /** |
| * Method for subclasses to use to set the maximum context length. |
| * @see #getMaximumContextLength |
| * @stable ICU 2.0 |
| */ |
| protected void setMaximumContextLength(int a) { |
| if (a < 0) { |
| throw new IllegalArgumentException("Invalid context length " + a); |
| } |
| maximumContextLength = a; |
| } |
| |
| /** |
| * Returns a programmatic identifier for this transliterator. |
| * If this identifier is passed to <code>getInstance()</code>, it |
| * will return this object, if it has been registered. |
| * @see #registerClass |
| * @see #getAvailableIDs |
| * @stable ICU 2.0 |
| */ |
| public final String getID() { |
| return ID; |
| } |
| |
| /** |
| * Set the programmatic identifier for this transliterator. Only |
| * for use by subclasses. |
| * @stable ICU 2.0 |
| */ |
| protected final void setID(String id) { |
| ID = id; |
| } |
| |
| /** |
| * Returns a name for this transliterator that is appropriate for |
| * display to the user in the default <code>DISPLAY</code> locale. See {@link |
| * #getDisplayName(String,Locale)} for details. |
| * @see com.ibm.icu.util.ULocale.Category#DISPLAY |
| * @stable ICU 2.0 |
| */ |
| public final static String getDisplayName(String ID) { |
| return getDisplayName(ID, ULocale.getDefault(Category.DISPLAY)); |
| } |
| |
| /** |
| * Returns a name for this transliterator that is appropriate for |
| * display to the user in the given locale. This name is taken |
| * from the locale resource data in the standard manner of the |
| * <code>java.text</code> package. |
| * |
| * <p>If no localized names exist in the system resource bundles, |
| * a name is synthesized using a localized |
| * <code>MessageFormat</code> pattern from the resource data. The |
| * arguments to this pattern are an integer followed by one or two |
| * strings. The integer is the number of strings, either 1 or 2. |
| * The strings are formed by splitting the ID for this |
| * transliterator at the first '-'. If there is no '-', then the |
| * entire ID forms the only string. |
| * @param inLocale the Locale in which the display name should be |
| * localized. |
| * @see java.text.MessageFormat |
| * @stable ICU 2.0 |
| */ |
| public static String getDisplayName(String id, Locale inLocale) { |
| return getDisplayName(id, ULocale.forLocale(inLocale)); |
| } |
| |
| /** |
| * Returns a name for this transliterator that is appropriate for |
| * display to the user in the given locale. This name is taken |
| * from the locale resource data in the standard manner of the |
| * <code>java.text</code> package. |
| * |
| * <p>If no localized names exist in the system resource bundles, |
| * a name is synthesized using a localized |
| * <code>MessageFormat</code> pattern from the resource data. The |
| * arguments to this pattern are an integer followed by one or two |
| * strings. The integer is the number of strings, either 1 or 2. |
| * The strings are formed by splitting the ID for this |
| * transliterator at the first '-'. If there is no '-', then the |
| * entire ID forms the only string. |
| * @param inLocale the ULocale in which the display name should be |
| * localized. |
| * @see java.text.MessageFormat |
| * @stable ICU 3.2 |
| */ |
| public static String getDisplayName(String id, ULocale inLocale) { |
| |
| // Resource bundle containing display name keys and the |
| // RB_RULE_BASED_IDS array. |
| // |
| //If we ever integrate this with the Sun JDK, the resource bundle |
| // root will change to sun.text.resources.LocaleElements |
| |
| ICUResourceBundle bundle = (ICUResourceBundle)UResourceBundle. |
| getBundleInstance(ICUResourceBundle.ICU_TRANSLIT_BASE_NAME, inLocale); |
| |
| // Normalize the ID |
| String stv[] = TransliteratorIDParser.IDtoSTV(id); |
| if (stv == null) { |
| // No target; malformed id |
| return ""; |
| } |
| String ID = stv[0] + '-' + stv[1]; |
| if (stv[2] != null && stv[2].length() > 0) { |
| ID = ID + '/' + stv[2]; |
| } |
| |
| // Use the registered display name, if any |
| String n = displayNameCache.get(new CaseInsensitiveString(ID)); |
| if (n != null) { |
| return n; |
| } |
| |
| // Use display name for the entire transliterator, if it |
| // exists. |
| try { |
| return bundle.getString(RB_DISPLAY_NAME_PREFIX + ID); |
| } catch (MissingResourceException e) {} |
| |
| try { |
| // Construct the formatter first; if getString() fails |
| // we'll exit the try block |
| MessageFormat format = new MessageFormat( |
| bundle.getString(RB_DISPLAY_NAME_PATTERN)); |
| // Construct the argument array |
| Object[] args = new Object[] { Integer.valueOf(2), stv[0], stv[1] }; |
| |
| // Use display names for the scripts, if they exist |
| for (int j=1; j<=2; ++j) { |
| try { |
| args[j] = bundle.getString(RB_SCRIPT_DISPLAY_NAME_PREFIX + |
| (String) args[j]); |
| } catch (MissingResourceException e) {} |
| } |
| |
| // Format it using the pattern in the resource |
| return (stv[2].length() > 0) ? |
| (format.format(args) + '/' + stv[2]) : |
| format.format(args); |
| } catch (MissingResourceException e2) {} |
| |
| // We should not reach this point unless there is something |
| // wrong with the build or the RB_DISPLAY_NAME_PATTERN has |
| // been deleted from the root RB_LOCALE_ELEMENTS resource. |
| throw new RuntimeException(); |
| } |
| |
| /** |
| * Returns the filter used by this transliterator, or <tt>null</tt> |
| * if this transliterator uses no filter. |
| * @stable ICU 2.0 |
| */ |
| public final UnicodeFilter getFilter() { |
| return filter; |
| } |
| |
| /** |
| * Changes the filter used by this transliterator. If the filter |
| * is set to <tt>null</tt> then no filtering will occur. |
| * |
| * <p>Callers must take care if a transliterator is in use by |
| * multiple threads. The filter should not be changed by one |
| * thread while another thread may be transliterating. |
| * @stable ICU 2.0 |
| */ |
| public void setFilter(UnicodeFilter filter) { |
| if (filter == null) { |
| this.filter = null; |
| } else { |
| try { |
| // fast high-runner case |
| this.filter = new UnicodeSet((UnicodeSet)filter).freeze(); |
| } catch (Exception e) { |
| this.filter = new UnicodeSet(); |
| filter.addMatchSetTo(this.filter); |
| this.filter.freeze(); |
| } |
| } |
| } |
| |
| /** |
| * Returns a <code>Transliterator</code> object given its ID. |
| * The ID must be either a system transliterator ID or a ID registered |
| * using <code>registerClass()</code>. |
| * |
| * @param ID a valid ID, as enumerated by <code>getAvailableIDs()</code> |
| * @return A <code>Transliterator</code> object with the given ID |
| * @exception IllegalArgumentException if the given ID is invalid. |
| * @stable ICU 2.0 |
| */ |
| public static final Transliterator getInstance(String ID) { |
| return getInstance(ID, FORWARD); |
| } |
| |
| /** |
| * Returns a <code>Transliterator</code> object given its ID. |
| * The ID must be either a system transliterator ID or a ID registered |
| * using <code>registerClass()</code>. |
| * |
| * @param ID a valid ID, as enumerated by <code>getAvailableIDs()</code> |
| * @param dir either FORWARD or REVERSE. If REVERSE then the |
| * inverse of the given ID is instantiated. |
| * @return A <code>Transliterator</code> object with the given ID |
| * @exception IllegalArgumentException if the given ID is invalid. |
| * @see #registerClass |
| * @see #getAvailableIDs |
| * @see #getID |
| * @stable ICU 2.0 |
| */ |
| public static Transliterator getInstance(String ID, |
| int dir) { |
| StringBuffer canonID = new StringBuffer(); |
| List<SingleID> list = new ArrayList<SingleID>(); |
| UnicodeSet[] globalFilter = new UnicodeSet[1]; |
| if (!TransliteratorIDParser.parseCompoundID(ID, dir, canonID, list, globalFilter)) { |
| throw new IllegalArgumentException("Invalid ID " + ID); |
| } |
| |
| List<Transliterator> translits = TransliteratorIDParser.instantiateList(list); |
| |
| // assert(list.size() > 0); |
| Transliterator t = null; |
| if (list.size() > 1 || canonID.indexOf(";") >= 0) { |
| // [NOTE: If it's a compoundID, we instantiate a CompoundTransliterator even if it only |
| // has one child transliterator. This is so that toRules() will return the right thing |
| // (without any inactive ID), but our main ID still comes out correct. That is, if we |
| // instantiate "(Lower);Latin-Greek;", we want the rules to come out as "::Latin-Greek;" |
| // even though the ID is "(Lower);Latin-Greek;". |
| t = new CompoundTransliterator(translits); |
| } |
| else { |
| t = translits.get(0); |
| } |
| |
| t.setID(canonID.toString()); |
| if (globalFilter[0] != null) { |
| t.setFilter(globalFilter[0]); |
| } |
| return t; |
| } |
| |
| /** |
| * Create a transliterator from a basic ID. This is an ID |
| * containing only the forward direction source, target, and |
| * variant. |
| * @param id a basic ID of the form S-T or S-T/V. |
| * @param canonID canonical ID to apply to the result, or |
| * null to leave the ID unchanged |
| * @return a newly created Transliterator or null if the ID is |
| * invalid. |
| */ |
| static Transliterator getBasicInstance(String id, String canonID) { |
| StringBuffer s = new StringBuffer(); |
| Transliterator t = registry.get(id, s); |
| if (s.length() != 0) { |
| // assert(t==0); |
| // Instantiate an alias |
| t = getInstance(s.toString(), FORWARD); |
| } |
| if (t != null && canonID != null) { |
| t.setID(canonID); |
| } |
| return t; |
| } |
| |
| /** |
| * Returns a <code>Transliterator</code> object constructed from |
| * the given rule string. This will be a RuleBasedTransliterator, |
| * if the rule string contains only rules, or a |
| * CompoundTransliterator, if it contains ID blocks, or a |
| * NullTransliterator, if it contains ID blocks which parse as |
| * empty for the given direction. |
| * @stable ICU 2.0 |
| */ |
| public static final Transliterator createFromRules(String ID, String rules, int dir) { |
| Transliterator t = null; |
| |
| TransliteratorParser parser = new TransliteratorParser(); |
| parser.parse(rules, dir); |
| |
| // NOTE: The logic here matches that in TransliteratorRegistry. |
| if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 0) { |
| t = new NullTransliterator(); |
| } |
| else if (parser.idBlockVector.size() == 0 && parser.dataVector.size() == 1) { |
| t = new RuleBasedTransliterator(ID, parser.dataVector.get(0), parser.compoundFilter); |
| } |
| else if (parser.idBlockVector.size() == 1 && parser.dataVector.size() == 0) { |
| // idBlock, no data -- this is an alias. The ID has |
| // been munged from reverse into forward mode, if |
| // necessary, so instantiate the ID in the forward |
| // direction. |
| if (parser.compoundFilter != null) { |
| t = getInstance(parser.compoundFilter.toPattern(false) + ";" |
| + parser.idBlockVector.get(0)); |
| } else { |
| t = getInstance(parser.idBlockVector.get(0)); |
| } |
| |
| if (t != null) { |
| t.setID(ID); |
| } |
| } |
| else { |
| List<Transliterator> transliterators = new ArrayList<Transliterator>(); |
| int passNumber = 1; |
| |
| int limit = Math.max(parser.idBlockVector.size(), parser.dataVector.size()); |
| for (int i = 0; i < limit; i++) { |
| if (i < parser.idBlockVector.size()) { |
| String idBlock = parser.idBlockVector.get(i); |
| if (idBlock.length() > 0) { |
| Transliterator temp = getInstance(idBlock); |
| if (!(temp instanceof NullTransliterator)) |
| transliterators.add(getInstance(idBlock)); |
| } |
| } |
| if (i < parser.dataVector.size()) { |
| Data data = parser.dataVector.get(i); |
| transliterators.add(new RuleBasedTransliterator("%Pass" + passNumber++, data, null)); |
| } |
| } |
| |
| t = new CompoundTransliterator(transliterators, passNumber - 1); |
| t.setID(ID); |
| if (parser.compoundFilter != null) { |
| t.setFilter(parser.compoundFilter); |
| } |
| } |
| |
| return t; |
| } |
| |
| /** |
| * Returns a rule string for this transliterator. |
| * @param escapeUnprintable if true, then unprintable characters |
| * will be converted to escape form backslash-'u' or |
| * backslash-'U'. |
| * @stable ICU 2.0 |
| */ |
| public String toRules(boolean escapeUnprintable) { |
| return baseToRules(escapeUnprintable); |
| } |
| |
| /** |
| * Returns a rule string for this transliterator. This is |
| * a non-overrideable base class implementation that subclasses |
| * may call. It simply munges the ID into the correct format, |
| * that is, "foo" => "::foo". |
| * @param escapeUnprintable if true, then unprintable characters |
| * will be converted to escape form backslash-'u' or |
| * backslash-'U'. |
| * @stable ICU 2.0 |
| */ |
| protected final String baseToRules(boolean escapeUnprintable) { |
| // The base class implementation of toRules munges the ID into |
| // the correct format. That is: foo => ::foo |
| // KEEP in sync with rbt_pars |
| if (escapeUnprintable) { |
| StringBuffer rulesSource = new StringBuffer(); |
| String id = getID(); |
| for (int i=0; i<id.length();) { |
| int c = UTF16.charAt(id, i); |
| if (!Utility.escapeUnprintable(rulesSource, c)) { |
| UTF16.append(rulesSource, c); |
| } |
| i += UTF16.getCharCount(c); |
| } |
| rulesSource.insert(0, "::"); |
| rulesSource.append(ID_DELIM); |
| return rulesSource.toString(); |
| } |
| return "::" + getID() + ID_DELIM; |
| } |
| |
| /** |
| * Return the elements that make up this transliterator. For |
| * example, if the transliterator "NFD;Jamo-Latin;Latin-Greek" |
| * were created, the return value of this method would be an array |
| * of the three transliterator objects that make up that |
| * transliterator: [NFD, Jamo-Latin, Latin-Greek]. |
| * |
| * <p>If this transliterator is not composed of other |
| * transliterators, then this method will return an array of |
| * length one containing a reference to this transliterator. |
| * @return an array of one or more transliterators that make up |
| * this transliterator |
| * @stable ICU 3.0 |
| */ |
| public Transliterator[] getElements() { |
| Transliterator result[]; |
| if (this instanceof CompoundTransliterator) { |
| CompoundTransliterator cpd = (CompoundTransliterator) this; |
| result = new Transliterator[cpd.getCount()]; |
| for (int i=0; i<result.length; ++i) { |
| result[i] = cpd.getTransliterator(i); |
| } |
| } else { |
| result = new Transliterator[] { this }; |
| } |
| return result; |
| } |
| |
| /** |
| * Returns the set of all characters that may be modified in the |
| * input text by this Transliterator. This incorporates this |
| * object's current filter; if the filter is changed, the return |
| * value of this function will change. The default implementation |
| * returns an empty set. Some subclasses may override {@link |
| * #handleGetSourceSet} to return a more precise result. The |
| * return result is approximate in any case and is intended for |
| * use by tests, tools, or utilities. |
| * @see #getTargetSet |
| * @see #handleGetSourceSet |
| * @stable ICU 2.2 |
| */ |
| public final UnicodeSet getSourceSet() { |
| UnicodeSet result = new UnicodeSet(); |
| addSourceTargetSet(getFilterAsUnicodeSet(UnicodeSet.ALL_CODE_POINTS), result, new UnicodeSet()); |
| return result; |
| } |
| |
| /** |
| * Framework method that returns the set of all characters that |
| * may be modified in the input text by this Transliterator, |
| * ignoring the effect of this object's filter. The base class |
| * implementation returns the empty set. Subclasses that wish to |
| * implement this should override this method. |
| * @return the set of characters that this transliterator may |
| * modify. The set may be modified, so subclasses should return a |
| * newly-created object. |
| * @see #getSourceSet |
| * @see #getTargetSet |
| * @stable ICU 2.2 |
| */ |
| protected UnicodeSet handleGetSourceSet() { |
| return new UnicodeSet(); |
| } |
| |
| /** |
| * Returns the set of all characters that may be generated as |
| * replacement text by this transliterator. The default |
| * implementation returns the empty set. Some subclasses may |
| * override this method to return a more precise result. The |
| * return result is approximate in any case and is intended for |
| * use by tests, tools, or utilities requiring such |
| * meta-information. |
| * <p>Warning. You might expect an empty filter to always produce an empty target. |
| * However, consider the following: |
| * <pre> |
| * [Pp]{}[\u03A3\u03C2\u03C3\u03F7\u03F8\u03FA\u03FB] > \'; |
| * </pre> |
| * With a filter of [], you still get some elements in the target set, because this rule will still match. It could |
| * be recast to the following if it were important. |
| * <pre> |
| * [Pp]{([\u03A3\u03C2\u03C3\u03F7\u03F8\u03FA\u03FB])} > \' | $1; |
| * </pre> |
| * @see #getTargetSet |
| * @stable ICU 2.2 |
| */ |
| public UnicodeSet getTargetSet() { |
| UnicodeSet result = new UnicodeSet(); |
| addSourceTargetSet(getFilterAsUnicodeSet(UnicodeSet.ALL_CODE_POINTS), new UnicodeSet(), result); |
| return result; |
| } |
| |
| /** |
| * Returns the set of all characters that may be generated as |
| * replacement text by this transliterator, filtered by BOTH the input filter, and the current getFilter(). |
| * <p>SHOULD BE OVERRIDEN BY SUBCLASSES. |
| * It is probably an error for any transliterator to NOT override this, but we can't force them to |
| * for backwards compatibility. |
| * <p>Other methods vector through this. |
| * <p>When gathering the information on source and target, the compound transliterator makes things complicated. |
| * For example, suppose we have: |
| * <pre> |
| * Global FILTER = [ax] |
| * a > b; |
| * :: NULL; |
| * b > c; |
| * x > d; |
| * </pre> |
| * While the filter just allows a and x, b is an intermediate result, which could produce c. So the source and target sets |
| * cannot be gathered independently. What we have to do is filter the sources for the first transliterator according to |
| * the global filter, intersect that transliterator's filter. Based on that we get the target. |
| * The next transliterator gets as a global filter (global + last target). And so on. |
| * <p>There is another complication: |
| * <pre> |
| * Global FILTER = [ax] |
| * a > |b; |
| * b > c; |
| * </pre> |
| * Even though b would be filtered from the input, whenever we have a backup, it could be part of the input. So ideally we will |
| * change the global filter as we go. |
| * @param targetSet TODO |
| * @see #getTargetSet |
| * @internal |
| */ |
| public void addSourceTargetSet(UnicodeSet inputFilter, UnicodeSet sourceSet, UnicodeSet targetSet) { |
| UnicodeSet myFilter = getFilterAsUnicodeSet(inputFilter); |
| UnicodeSet temp = new UnicodeSet(handleGetSourceSet()).retainAll(myFilter); |
| // use old method, if we don't have anything better |
| sourceSet.addAll(temp); |
| // clumsy guess with target |
| for (String s : temp) { |
| String t = transliterate(s); |
| if (!s.equals(t)) { |
| targetSet.addAll(t); |
| } |
| } |
| } |
| |
| /** |
| * Returns the intersectionof this instance's filter intersected with an external filter. |
| * The externalFilter must be frozen (it is frozen if not). |
| * The result may be frozen, so don't attempt to modify. |
| * @internal |
| */ |
| // TODO change to getMergedFilter |
| public UnicodeSet getFilterAsUnicodeSet(UnicodeSet externalFilter) { |
| if (filter == null) { |
| return externalFilter; |
| } |
| UnicodeSet filterSet = new UnicodeSet(externalFilter); |
| // Most, but not all filters will be UnicodeSets. Optimize for |
| // the high-runner case. |
| UnicodeSet temp; |
| try { |
| temp = filter; |
| } catch (ClassCastException e) { |
| filter.addMatchSetTo(temp = new UnicodeSet()); |
| } |
| return filterSet.retainAll(temp).freeze(); |
| } |
| |
| /** |
| * Returns this transliterator's inverse. See the class |
| * documentation for details. This implementation simply inverts |
| * the two entities in the ID and attempts to retrieve the |
| * resulting transliterator. That is, if <code>getID()</code> |
| * returns "A-B", then this method will return the result of |
| * <code>getInstance("B-A")</code>, or <code>null</code> if that |
| * call fails. |
| * |
| * <p>Subclasses with knowledge of their inverse may wish to |
| * override this method. |
| * |
| * @return a transliterator that is an inverse, not necessarily |
| * exact, of this transliterator, or <code>null</code> if no such |
| * transliterator is registered. |
| * @see #registerClass |
| * @stable ICU 2.0 |
| */ |
| public final Transliterator getInverse() { |
| return getInstance(ID, REVERSE); |
| } |
| |
| /** |
| * Registers a subclass of <code>Transliterator</code> with the |
| * system. This subclass must have a public constructor taking no |
| * arguments. When that constructor is called, the resulting |
| * object must return the <code>ID</code> passed to this method if |
| * its <code>getID()</code> method is called. |
| * |
| * @param ID the result of <code>getID()</code> for this |
| * transliterator |
| * @param transClass a subclass of <code>Transliterator</code> |
| * @see #unregister |
| * @stable ICU 2.0 |
| */ |
| public static void registerClass(String ID, Class<? extends Transliterator> transClass, String displayName) { |
| registry.put(ID, transClass, true); |
| if (displayName != null) { |
| displayNameCache.put(new CaseInsensitiveString(ID), displayName); |
| } |
| } |
| |
| /** |
| * Register a factory object with the given ID. The factory |
| * method should return a new instance of the given transliterator. |
| * @param ID the ID of this transliterator |
| * @param factory the factory object |
| * @stable ICU 2.0 |
| */ |
| public static void registerFactory(String ID, Factory factory) { |
| registry.put(ID, factory, true); |
| } |
| |
| /** |
| * Register a Transliterator object with the given ID. |
| * @param trans the Transliterator object |
| * @stable ICU 2.2 |
| */ |
| public static void registerInstance(Transliterator trans) { |
| registry.put(trans.getID(), trans, true); |
| } |
| |
| /** |
| * Register a Transliterator object with the given ID. |
| * @param ID the ID of this transliterator |
| * @param trans the Transliterator object |
| */ |
| static void registerInstance(Transliterator trans, boolean visible) { |
| registry.put(trans.getID(), trans, visible); |
| } |
| |
| /** |
| * Register an ID as an alias of another ID. Instantiating |
| * alias ID produces the same result as instantiating the original ID. |
| * This is generally used to create short aliases of compound IDs. |
| * @param aliasID The new ID being registered. |
| * @param realID The existing ID that the new ID should be an alias of. |
| * @stable ICU 3.6 |
| */ |
| public static void registerAlias(String aliasID, String realID) { |
| registry.put(aliasID, realID, true); |
| } |
| |
| /** |
| * Register two targets as being inverses of one another. For |
| * example, calling registerSpecialInverse("NFC", "NFD", true) causes |
| * Transliterator to form the following inverse relationships: |
| * |
| * <pre>NFC => NFD |
| * Any-NFC => Any-NFD |
| * NFD => NFC |
| * Any-NFD => Any-NFC</pre> |
| * |
| * (Without the special inverse registration, the inverse of NFC |
| * would be NFC-Any.) Note that NFD is shorthand for Any-NFD, but |
| * that the presence or absence of "Any-" is preserved. |
| * |
| * <p>The relationship is symmetrical; registering (a, b) is |
| * equivalent to registering (b, a). |
| * |
| * <p>The relevant IDs must still be registered separately as |
| * factories or classes. |
| * |
| * <p>Only the targets are specified. Special inverses always |
| * have the form Any-Target1 <=> Any-Target2. The target should |
| * have canonical casing (the casing desired to be produced when |
| * an inverse is formed) and should contain no whitespace or other |
| * extraneous characters. |
| * |
| * @param target the target against which to register the inverse |
| * @param inverseTarget the inverse of target, that is |
| * Any-target.getInverse() => Any-inverseTarget |
| * @param bidirectional if true, register the reverse relation |
| * as well, that is, Any-inverseTarget.getInverse() => Any-target |
| */ |
| static void registerSpecialInverse(String target, |
| String inverseTarget, |
| boolean bidirectional) { |
| TransliteratorIDParser.registerSpecialInverse(target, inverseTarget, bidirectional); |
| } |
| |
| /** |
| * Unregisters a transliterator or class. This may be either |
| * a system transliterator or a user transliterator or class. |
| * |
| * @param ID the ID of the transliterator or class |
| * @see #registerClass |
| * @stable ICU 2.0 |
| */ |
| public static void unregister(String ID) { |
| displayNameCache.remove(new CaseInsensitiveString(ID)); |
| registry.remove(ID); |
| } |
| |
| /** |
| * Returns an enumeration over the programmatic names of registered |
| * <code>Transliterator</code> objects. This includes both system |
| * transliterators and user transliterators registered using |
| * <code>registerClass()</code>. The enumerated names may be |
| * passed to <code>getInstance()</code>. |
| * |
| * @return An <code>Enumeration</code> over <code>String</code> objects |
| * @see #getInstance |
| * @see #registerClass |
| * @stable ICU 2.0 |
| */ |
| public static final Enumeration<String> getAvailableIDs() { |
| return registry.getAvailableIDs(); |
| } |
| |
| /** |
| * Returns an enumeration over the source names of registered |
| * transliterators. Source names may be passed to |
| * getAvailableTargets() to obtain available targets for each |
| * source. |
| * @stable ICU 2.0 |
| */ |
| public static final Enumeration<String> getAvailableSources() { |
| return registry.getAvailableSources(); |
| } |
| |
| /** |
| * Returns an enumeration over the target names of registered |
| * transliterators having a given source name. Target names may |
| * be passed to getAvailableVariants() to obtain available |
| * variants for each source and target pair. |
| * @stable ICU 2.0 |
| */ |
| public static final Enumeration<String> getAvailableTargets(String source) { |
| return registry.getAvailableTargets(source); |
| } |
| |
| /** |
| * Returns an enumeration over the variant names of registered |
| * transliterators having a given source name and target name. |
| * @stable ICU 2.0 |
| */ |
| public static final Enumeration<String> getAvailableVariants(String source, |
| String target) { |
| return registry.getAvailableVariants(source, target); |
| } |
| private static final String INDEX = "index", |
| RB_RULE_BASED_IDS ="RuleBasedTransliteratorIDs"; |
| static { |
| registry = new TransliteratorRegistry(); |
| |
| // The display name cache starts out empty |
| displayNameCache = Collections.synchronizedMap(new HashMap<CaseInsensitiveString, String>()); |
| /* The following code parses the index table located in |
| * icu/data/translit/root.txt. The index is an n x 4 table |
| * that follows this format: |
| * <id>{ |
| * file{ |
| * resource{"<resource>"} |
| * direction{"<direction>"} |
| * } |
| * } |
| * <id>{ |
| * internal{ |
| * resource{"<resource>"} |
| * direction{"<direction"} |
| * } |
| * } |
| * <id>{ |
| * alias{"<getInstanceArg"} |
| * } |
| * <id> is the ID of the system transliterator being defined. These |
| * are public IDs enumerated by Transliterator.getAvailableIDs(), |
| * unless the second field is "internal". |
| * |
| * <resource> is a ResourceReader resource name. Currently these refer |
| * to file names under com/ibm/text/resources. This string is passed |
| * directly to ResourceReader, together with <encoding>. |
| * |
| * <direction> is either "FORWARD" or "REVERSE". |
| * |
| * <getInstanceArg> is a string to be passed directly to |
| * Transliterator.getInstance(). The returned Transliterator object |
| * then has its ID changed to <id> and is returned. |
| * |
| * The extra blank field on "alias" lines is to make the array square. |
| */ |
| UResourceBundle bundle, transIDs, colBund; |
| bundle = UResourceBundle.getBundleInstance(ICUResourceBundle.ICU_TRANSLIT_BASE_NAME, INDEX); |
| transIDs = bundle.get(RB_RULE_BASED_IDS); |
| |
| int row, maxRows; |
| maxRows = transIDs.getSize(); |
| for (row = 0; row < maxRows; row++) { |
| colBund = transIDs.get(row); |
| String ID = colBund.getKey(); |
| UResourceBundle res = colBund.get(0); |
| String type = res.getKey(); |
| if (type.equals("file") || type.equals("internal")) { |
| // Rest of line is <resource>:<encoding>:<direction> |
| // pos colon c2 |
| String resString = res.getString("resource"); |
| int dir; |
| String direction = res.getString("direction"); |
| switch (direction.charAt(0)) { |
| case 'F': |
| dir = FORWARD; |
| break; |
| case 'R': |
| dir = REVERSE; |
| break; |
| default: |
| throw new RuntimeException("Can't parse direction: " + direction); |
| } |
| registry.put(ID, |
| resString, // resource |
| "UTF-16", // encoding |
| dir, |
| !type.equals("internal")); |
| } else if (type.equals("alias")) { |
| //'alias'; row[2]=createInstance argument |
| String resString = res.getString(); |
| registry.put(ID, resString, true); |
| } else { |
| // Unknown type |
| throw new RuntimeException("Unknow type: " + type); |
| } |
| } |
| |
| registerSpecialInverse(NullTransliterator.SHORT_ID, NullTransliterator.SHORT_ID, false); |
| |
| // Register non-rule-based transliterators |
| registerClass(NullTransliterator._ID, |
| NullTransliterator.class, null); |
| RemoveTransliterator.register(); |
| EscapeTransliterator.register(); |
| UnescapeTransliterator.register(); |
| LowercaseTransliterator.register(); |
| UppercaseTransliterator.register(); |
| TitlecaseTransliterator.register(); |
| CaseFoldTransliterator.register(); |
| UnicodeNameTransliterator.register(); |
| NameUnicodeTransliterator.register(); |
| NormalizationTransliterator.register(); |
| BreakTransliterator.register(); |
| AnyTransliterator.register(); // do this last! |
| } |
| |
| /** |
| * Register the script-based "Any" transliterators: Any-Latin, Any-Greek |
| * @internal |
| * @deprecated This API is ICU internal only. |
| */ |
| public static void registerAny() { |
| AnyTransliterator.register(); |
| } |
| |
| /** |
| * The factory interface for transliterators. Transliterator |
| * subclasses can register factory objects for IDs using the |
| * registerFactory() method of Transliterator. When invoked, the |
| * factory object will be passed the ID being instantiated. This |
| * makes it possible to register one factory method to more than |
| * one ID, or for a factory method to parameterize its result |
| * based on the variant. |
| * @stable ICU 2.0 |
| */ |
| public static interface Factory { |
| /** |
| * Return a transliterator for the given ID. |
| * @stable ICU 2.0 |
| */ |
| Transliterator getInstance(String ID); |
| } |
| |
| /** |
| * Implements StringTransform via this method. |
| * @param source text to be transformed (eg lowercased) |
| * @return result |
| * @stable ICU 3.8 |
| */ |
| public String transform(String source) { |
| return transliterate(source); |
| } |
| } |