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/*
**********************************************************************
* Copyright (c) 2004-2010, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
* Author: Alan Liu
* Created: April 6, 2004
* Since: ICU 3.0
**********************************************************************
*/
package com.ibm.icu.text;
import java.io.IOException;
import java.io.InvalidObjectException;
import java.io.ObjectInputStream;
import java.text.AttributedCharacterIterator;
import java.text.AttributedCharacterIterator.Attribute;
import java.text.AttributedString;
import java.text.CharacterIterator;
import java.text.ChoiceFormat;
import java.text.FieldPosition;
import java.text.Format;
import java.text.ParseException;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;
import com.ibm.icu.impl.Utility;
import com.ibm.icu.lang.UCharacter;
import com.ibm.icu.util.ULocale;
/**
* {@icuenhanced java.text.MessageFormat}.{@icu _usage_}
*
* <p>MessageFormat produces concatenated messages in a language-neutral
* way. Use this whenever concatenating strings that are displayed to
* end users.
*
* <p>A MessageFormat contains an array of <em>subformats</em> arranged
* within a <em>template string</em>. Together, the subformats and
* template string determine how the MessageFormat will operate during
* formatting and parsing.
*
* <p>Typically, both the subformats and the template string are
* specified at once in a <em>pattern</em>. By using different
* patterns for different locales, messages may be localized.
*
* <p>When formatting, MessageFormat takes a collection of arguments
* and produces a user-readable string. The arguments may be passed
* as an array or as a Map. Each argument is matched up with its
* corresponding subformat, which then formats it into a string. The
* resulting strings are then assembled within the string template of
* the MessageFormat to produce the final output string.
*
* <p><strong>Note:</strong>
* <code>MessageFormat</code> differs from the other <code>Format</code>
* classes in that you create a <code>MessageFormat</code> object with one
* of its constructors (not with a <code>getInstance</code> style factory
* method). The factory methods aren't necessary because <code>MessageFormat</code>
* itself doesn't implement locale-specific behavior. Any locale-specific
* behavior is defined by the pattern that you provide and the
* subformats used for inserted arguments.
*
* <p><strong>Note:</strong>
* In ICU 3.8 MessageFormat supports named arguments. If a named argument
* is used, all arguments must be named. Names start with a character in
* <code>:ID_START:</code> and continue with characters in <code>:ID_CONTINUE:</code>,
* in particular they do not start with a digit. If named arguments
* are used, {@link #usesNamedArguments()} will return true.
*
* <p>The other new methods supporting named arguments are
* {@link #setFormatsByArgumentName(Map)},
* {@link #setFormatByArgumentName(String, Format)},
* {@link #format(Map, StringBuffer, FieldPosition)},
* {@link #format(String, Map)}, {@link #parseToMap(String, ParsePosition)},
* and {@link #parseToMap(String)}. These methods are all compatible
* with patterns that do not used named arguments-- in these cases
* the keys in the input or output <code>Map</code>s use
* <code>String</code>s that name the argument indices, e.g. "0",
* "1", "2"... etc.
*
* <p>When named arguments are used, certain methods on MessageFormat that take or
* return arrays will throw an exception, since it is not possible to
* identify positions in an array using a name. These methods are
* {@link #setFormatsByArgumentIndex(Format[])},
* {@link #setFormatByArgumentIndex(int, Format)},
* {@link #getFormatsByArgumentIndex()},
* {@link #getFormats()},
* {@link #format(Object[], StringBuffer, FieldPosition)},
* {@link #format(String, Object[])},
* {@link #parse(String, ParsePosition)}, and
* {@link #parse(String)}.
* These APIs all have corresponding new versions as listed above.
*
* <p>The API {@link #format(Object, StringBuffer, FieldPosition)} has
* been modified so that the <code>Object</code> argument can be
* either an <code>Object</code> array or a <code>Map</code>. If this
* format uses named arguments, this argument must not be an
* <code>Object</code> array otherwise an exception will be thrown.
* If the argument is a <code>Map</code> it can be used with Strings that
* represent indices as described above.
*
* <h4><a name="patterns">Patterns and Their Interpretation</a></h4>
*
* <code>MessageFormat</code> uses patterns of the following form:
* <blockquote><pre>
* <i>MessageFormatPattern:</i>
* <i>String</i>
* <i>MessageFormatPattern</i> <i>FormatElement</i> <i>String</i>
*
* <i>FormatElement:</i>
* { <i>ArgumentIndexOrName</i> }
* { <i>ArgumentIndexOrName</i> , <i>FormatType</i> }
* { <i>ArgumentIndexOrName</i> , <i>FormatType</i> , <i>FormatStyle</i> }
*
* <i>ArgumentIndexOrName: one of </i>
* ['0'-'9']+
* [:ID_START:][:ID_CONTINUE:]*
*
* <i>FormatType: one of </i>
* number date time choice spellout ordinal duration plural
*
* <i>FormatStyle:</i>
* short
* medium
* long
* full
* integer
* currency
* percent
* <i>SubformatPattern</i>
* <i>RulesetName</i>
*
* <i>String:</i>
* <i>StringPart<sub>opt</sub></i>
* <i>String</i> <i>StringPart</i>
*
* <i>StringPart:</i>
* ''
* ' <i>QuotedString</i> '
* <i>UnquotedString</i>
*
* <i>SubformatPattern:</i>
* <i>SubformatPatternPart<sub>opt</sub></i>
* <i>SubformatPattern</i> <i>SubformatPatternPart</i>
*
* <i>SubFormatPatternPart:</i>
* ' <i>QuotedPattern</i> '
* <i>UnquotedPattern</i>
* </pre></blockquote>
*
* <i>RulesetName:</i>
* <i>UnquotedString</i>
*
* <p>Within a <i>String</i>, <code>"''"</code> represents a single
* quote. A <i>QuotedString</i> can contain arbitrary characters
* except single quotes; the surrounding single quotes are removed.
* An <i>UnquotedString</i> can contain arbitrary characters
* except single quotes and left curly brackets. Thus, a string that
* should result in the formatted message "'{0}'" can be written as
* <code>"'''{'0}''"</code> or <code>"'''{0}'''"</code>.
*
* <p>Within a <i>SubformatPattern</i>, different rules apply.
* A <i>QuotedPattern</i> can contain arbitrary characters
* except single quotes; but the surrounding single quotes are
* <strong>not</strong> removed, so they may be interpreted by the
* subformat. For example, <code>"{1,number,$'#',##}"</code> will
* produce a number format with the pound-sign quoted, with a result
* such as: "$#31,45".
* An <i>UnquotedPattern</i> can contain arbitrary characters
* except single quotes, but curly braces within it must be balanced.
* For example, <code>"ab {0} de"</code> and <code>"ab '}' de"</code>
* are valid subformat patterns, but <code>"ab {0'}' de"</code> and
* <code>"ab } de"</code> are not.
*
* <p><dl><dt><b>Warning:</b><dd>The rules for using quotes within message
* format patterns unfortunately have shown to be somewhat confusing.
* In particular, it isn't always obvious to localizers whether single
* quotes need to be doubled or not. Make sure to inform localizers about
* the rules, and tell them (for example, by using comments in resource
* bundle source files) which strings will be processed by MessageFormat.
* Note that localizers may need to use single quotes in translated
* strings where the original version doesn't have them.
*
* <br>Note also that the simplest way to avoid the problem is to
* use the real apostrophe (single quote) character \u2019 (') for
* human-readable text, and to use the ASCII apostrophe (\u0027 ' )
* only in program syntax, like quoting in MessageFormat.
* See the annotations for U+0027 Apostrophe in The Unicode Standard.</p>
* </dl>
*
* <p>The <i>ArgumentIndex</i> value is a non-negative integer written
* using the digits '0' through '9', and represents an index into the
* <code>arguments</code> array passed to the <code>format</code> methods
* or the result array returned by the <code>parse</code> methods.
*
* <p>The <i>FormatType</i> and <i>FormatStyle</i> values are used to create
* a <code>Format</code> instance for the format element. The following
* table shows how the values map to Format instances. Combinations not
* shown in the table are illegal. A <i>SubformatPattern</i> must
* be a valid pattern string for the Format subclass used.
*
* <p><table border=1>
* <tr>
* <th>Format Type
* <th>Format Style
* <th>Subformat Created
* <tr>
* <td colspan=2><i>(none)</i>
* <td><code>null</code>
* <tr>
* <td rowspan=5><code>number</code>
* <td><i>(none)</i>
* <td><code>NumberFormat.getInstance(getLocale())</code>
* <tr>
* <td><code>integer</code>
* <td><code>NumberFormat.getIntegerInstance(getLocale())</code>
* <tr>
* <td><code>currency</code>
* <td><code>NumberFormat.getCurrencyInstance(getLocale())</code>
* <tr>
* <td><code>percent</code>
* <td><code>NumberFormat.getPercentInstance(getLocale())</code>
* <tr>
* <td><i>SubformatPattern</i>
* <td><code>new DecimalFormat(subformatPattern, new DecimalFormatSymbols(getLocale()))</code>
* <tr>
* <td rowspan=6><code>date</code>
* <td><i>(none)</i>
* <td><code>DateFormat.getDateInstance(DateFormat.DEFAULT, getLocale())</code>
* <tr>
* <td><code>short</code>
* <td><code>DateFormat.getDateInstance(DateFormat.SHORT, getLocale())</code>
* <tr>
* <td><code>medium</code>
* <td><code>DateFormat.getDateInstance(DateFormat.DEFAULT, getLocale())</code>
* <tr>
* <td><code>long</code>
* <td><code>DateFormat.getDateInstance(DateFormat.LONG, getLocale())</code>
* <tr>
* <td><code>full</code>
* <td><code>DateFormat.getDateInstance(DateFormat.FULL, getLocale())</code>
* <tr>
* <td><i>SubformatPattern</i>
* <td><code>new SimpleDateFormat(subformatPattern, getLocale())
* <tr>
* <td rowspan=6><code>time</code>
* <td><i>(none)</i>
* <td><code>DateFormat.getTimeInstance(DateFormat.DEFAULT, getLocale())</code>
* <tr>
* <td><code>short</code>
* <td><code>DateFormat.getTimeInstance(DateFormat.SHORT, getLocale())</code>
* <tr>
* <td><code>medium</code>
* <td><code>DateFormat.getTimeInstance(DateFormat.DEFAULT, getLocale())</code>
* <tr>
* <td><code>long</code>
* <td><code>DateFormat.getTimeInstance(DateFormat.LONG, getLocale())</code>
* <tr>
* <td><code>full</code>
* <td><code>DateFormat.getTimeInstance(DateFormat.FULL, getLocale())</code>
* <tr>
* <td><i>SubformatPattern</i>
* <td><code>new SimpleDateFormat(subformatPattern, getLocale())
* <tr>
* <td><code>choice</code>
* <td><i>SubformatPattern</i>
* <td><code>new ChoiceFormat(subformatPattern)</code>
* <tr>
* <td><code>spellout</code>
* <td><i>RulesetName (optional)</i>
* <td><code>new RuleBasedNumberFormat(getLocale(), RuleBasedNumberFormat.SPELLOUT)
* <br/>&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRuleset(ruleset);</code>
* <tr>
* <td><code>ordinal</code>
* <td><i>RulesetName (optional)</i>
* <td><code>new RuleBasedNumberFormat(getLocale(), RuleBasedNumberFormat.ORDINAL)
* <br/>&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRuleset(ruleset);</code>
* <tr>
* <td><code>duration</code>
* <td><i>RulesetName (optional)</i>
* <td><code>new RuleBasedNumberFormat(getLocale(), RuleBasedNumberFormat.DURATION)
* <br/>&nbsp;&nbsp;&nbsp;&nbsp;.setDefaultRuleset(ruleset);</code>
* <tr>
* <td><code>plural</code>
* <td><i>SubformatPattern</i>
* <td><code>new PluralFormat(subformatPattern)</code>
* <tr>
* <td><code>select</code>
* <td><i>SubformatPattern</i>
* <td><code>new SelectFormat(subformatPattern)</code>
* </table>
* <p>
*
* <h4>Usage Information</h4>
*
* <p>Here are some examples of usage:
* <blockquote>
* <pre>
* Object[] arguments = {
* new Integer(7),
* new Date(System.currentTimeMillis()),
* "a disturbance in the Force"
* };
*
* String result = MessageFormat.format(
* "At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
* arguments);
*
* <em>output</em>: At 12:30 PM on Jul 3, 2053, there was a disturbance
* in the Force on planet 7.
*
* </pre>
* </blockquote>
* Typically, the message format will come from resources, and the
* arguments will be dynamically set at runtime.
*
* <p>Example 2:
* <blockquote>
* <pre>
* Object[] testArgs = {new Long(3), "MyDisk"};
*
* MessageFormat form = new MessageFormat(
* "The disk \"{1}\" contains {0} file(s).");
*
* System.out.println(form.format(testArgs));
*
* // output, with different testArgs
* <em>output</em>: The disk "MyDisk" contains 0 file(s).
* <em>output</em>: The disk "MyDisk" contains 1 file(s).
* <em>output</em>: The disk "MyDisk" contains 1,273 file(s).
* </pre>
* </blockquote>
*
* <p>
* <strong>Creating internationalized messages that include plural forms, you
* can use a PluralFormat:</strong>
* <pre>
* MessageFormat msgFmt = new MessageFormat("{0, plural, " +
* "one{{0, number, C''''est #,##0.0# fichier}} " +
* "other {Ce sont # fichiers}} dans la liste.",
* new ULocale("fr"));
* Object args[] = {new Long(0)};
* System.out.println(msgFmt.format(args));
* args = {new Long(3)};
* System.out.println(msgFmt.format(args));
*
* Produces the output:<br />
* <code>C'est 0,0 fichier dans la liste.</code><br />
* <code>Ce sont 3 fichiers dans la liste."</code>
* </pre>
* Please check {@link PluralFormat} and {@link PluralRules} for details.
* </p>
*
* <h4><a name="synchronization">Synchronization</a></h4>
*
* <p>Message formats are not synchronized.
* It is recommended to create separate format instances for each thread.
* If multiple threads access a format concurrently, it must be synchronized
* externally.
*
* @see java.util.Locale
* @see Format
* @see NumberFormat
* @see DecimalFormat
* @see ChoiceFormat
* @see PluralFormat
* @see SelectFormat
* @author Mark Davis
* @stable ICU 3.0
*/
public class MessageFormat extends UFormat {
// Generated by serialver from JDK 1.4.1_01
static final long serialVersionUID = 7136212545847378651L;
/**
* Constructs a MessageFormat for the default locale and the
* specified pattern.
* The constructor first sets the locale, then parses the pattern and
* creates a list of subformats for the format elements contained in it.
* Patterns and their interpretation are specified in the
* <a href="#patterns">class description</a>.
*
* @param pattern the pattern for this message format
* @exception IllegalArgumentException if the pattern is invalid
* @stable ICU 3.0
*/
public MessageFormat(String pattern) {
this.ulocale = ULocale.getDefault();
applyPattern(pattern);
}
/**
* Constructs a MessageFormat for the specified locale and
* pattern.
* The constructor first sets the locale, then parses the pattern and
* creates a list of subformats for the format elements contained in it.
* Patterns and their interpretation are specified in the
* <a href="#patterns">class description</a>.
*
* @param pattern the pattern for this message format
* @param locale the locale for this message format
* @exception IllegalArgumentException if the pattern is invalid
* @stable ICU 3.0
*/
public MessageFormat(String pattern, Locale locale) {
this(pattern, ULocale.forLocale(locale));
}
/**
* Constructs a MessageFormat for the specified locale and
* pattern.
* The constructor first sets the locale, then parses the pattern and
* creates a list of subformats for the format elements contained in it.
* Patterns and their interpretation are specified in the
* <a href="#patterns">class description</a>.
*
* @param pattern the pattern for this message format
* @param locale the locale for this message format
* @exception IllegalArgumentException if the pattern is invalid
* @stable ICU 3.2
*/
public MessageFormat(String pattern, ULocale locale) {
this.ulocale = locale;
applyPattern(pattern);
}
/**
* Sets the locale to be used when creating or comparing subformats.
* This affects subsequent calls to the {@link #applyPattern applyPattern}
* and {@link #toPattern toPattern} methods as well as to the
* <code>format</code> and
* {@link #formatToCharacterIterator formatToCharacterIterator} methods.
*
* @param locale the locale to be used when creating or comparing subformats
* @stable ICU 3.0
*/
public void setLocale(Locale locale) {
setLocale(ULocale.forLocale(locale));
}
/**
* Sets the locale to be used when creating or comparing subformats.
* This affects subsequent calls to the {@link #applyPattern applyPattern}
* and {@link #toPattern toPattern} methods as well as to the
* <code>format</code> and
* {@link #formatToCharacterIterator formatToCharacterIterator} methods.
*
* @param locale the locale to be used when creating or comparing subformats
* @stable ICU 3.2
*/
public void setLocale(ULocale locale) {
/* Save the pattern, and then reapply so that */
/* we pick up any changes in locale specific */
/* elements */
String existingPattern = toPattern(); /*ibm.3550*/
this.ulocale = locale;
applyPattern(existingPattern); /*ibm.3550*/
}
/**
* Returns the locale that's used when creating or comparing subformats.
*
* @return the locale used when creating or comparing subformats
* @stable ICU 3.0
*/
public Locale getLocale() {
return ulocale.toLocale();
}
/**
* {@icu} Returns the locale that's used when creating or comparing subformats.
*
* @return the locale used when creating or comparing subformats
* @stable ICU 3.2
*/
public ULocale getULocale() {
return ulocale;
}
/**
* Sets the pattern used by this message format.
* The method parses the pattern and creates a list of subformats
* for the format elements contained in it.
* Patterns and their interpretation are specified in the
* <a href="#patterns">class description</a>.
* <p>
* The pattern must contain only named or only numeric arguments,
* mixing them is not allowed.
*
* @param pttrn the pattern for this message format
* @throws IllegalArgumentException if the pattern is invalid
* @stable ICU 3.0
*/
@SuppressWarnings("fallthrough")
public void applyPattern(String pttrn) {
StringBuilder[] segments = new StringBuilder[4];
for (int i = 0; i < segments.length; ++i) {
segments[i] = new StringBuilder();
}
int part = 0;
int formatNumber = 0;
boolean inQuote = false;
int braceStack = 0;
maxOffset = -1;
for (int i = 0; i < pttrn.length(); ++i) {
char ch = pttrn.charAt(i);
if (part == 0) {
if (ch == '\'') {
if (i + 1 < pttrn.length()
&& pttrn.charAt(i+1) == '\'') {
segments[part].append(ch); // handle doubles
++i;
} else {
inQuote = !inQuote;
}
} else if (ch == '{' && !inQuote) {
part = 1;
} else {
segments[part].append(ch);
}
} else if (inQuote) { // just copy quotes in parts
segments[part].append(ch);
if (ch == '\'') {
inQuote = false;
}
} else {
switch (ch) {
case ',':
if (part < 3)
part += 1;
else
segments[part].append(ch);
break;
case '{':
++braceStack;
segments[part].append(ch);
break;
case '}':
if (braceStack == 0) {
part = 0;
makeFormat(i, formatNumber, segments);
formatNumber++;
} else {
--braceStack;
segments[part].append(ch);
}
break;
case '\'':
inQuote = true;
// fall through, so we keep quotes in other parts
default:
segments[part].append(ch);
break;
}
}
}
if (braceStack == 0 && part != 0) {
maxOffset = -1;
throw new IllegalArgumentException("Unmatched braces in the pattern.");
}
this.pattern = segments[0].toString();
}
/**
* Returns a pattern representing the current state of the message format.
* The string is constructed from internal information and therefore
* does not necessarily equal the previously applied pattern.
*
* @return a pattern representing the current state of the message format
* @stable ICU 3.0
*/
public String toPattern() {
// later, make this more extensible
int lastOffset = 0;
StringBuilder result = new StringBuilder();
for (int i = 0; i <= maxOffset; ++i) {
copyAndFixQuotes(pattern, lastOffset, offsets[i],result);
lastOffset = offsets[i];
result.append('{');
result.append(argumentNames[i]);
if (formats[i] == null) {
// do nothing, string format
} else if (formats[i] instanceof DecimalFormat) {
if (formats[i].equals(NumberFormat.getInstance(ulocale))) {
result.append(",number");
} else if (formats[i].equals(NumberFormat.getCurrencyInstance(ulocale))) {
result.append(",number,currency");
} else if (formats[i].equals(NumberFormat.getPercentInstance(ulocale))) {
result.append(",number,percent");
} else if (formats[i].equals(NumberFormat.getIntegerInstance(ulocale))) {
result.append(",number,integer");
} else {
result.append(",number," +
((DecimalFormat)formats[i]).toPattern());
}
} else if (formats[i] instanceof SimpleDateFormat) {
if (formats[i].equals(DateFormat.getDateInstance(DateFormat.DEFAULT,ulocale))) {
result.append(",date");
} else if (formats[i].equals(DateFormat.getDateInstance(DateFormat.SHORT,ulocale))) {
result.append(",date,short");
// This code will never be executed [alan]
// } else if (formats[i].equals(DateFormat.getDateInstance(DateFormat.DEFAULT,ulocale))) {
// result.append(",date,medium");
} else if (formats[i].equals(DateFormat.getDateInstance(DateFormat.LONG,ulocale))) {
result.append(",date,long");
} else if (formats[i].equals(DateFormat.getDateInstance(DateFormat.FULL,ulocale))) {
result.append(",date,full");
} else if (formats[i].equals(DateFormat.getTimeInstance(DateFormat.DEFAULT,ulocale))) {
result.append(",time");
} else if (formats[i].equals(DateFormat.getTimeInstance(DateFormat.SHORT,ulocale))) {
result.append(",time,short");
// This code will never be executed [alan]
// } else if (formats[i].equals(DateFormat.getTimeInstance(DateFormat.DEFAULT,ulocale))) {
// result.append(",time,medium");
} else if (formats[i].equals(DateFormat.getTimeInstance(DateFormat.LONG,ulocale))) {
result.append(",time,long");
} else if (formats[i].equals(DateFormat.getTimeInstance(DateFormat.FULL,ulocale))) {
result.append(",time,full");
} else {
result.append(",date," + ((SimpleDateFormat)formats[i]).toPattern());
}
} else if (formats[i] instanceof ChoiceFormat) {
result.append(",choice,"
+ ((ChoiceFormat) formats[i]).toPattern());
} else if (formats[i] instanceof PluralFormat ){
String pat = ((PluralFormat)formats[i]).toPattern();
// TODO: PluralFormat does not do the single quote thing, just reapply
pat = duplicateSingleQuotes(pat);
result.append(",plural," + pat);
} else if (formats[i] instanceof SelectFormat) {
String pat = ((SelectFormat)formats[i]).toPattern();
//TODO: SelectFormat does not do the single quote thing, just reapply
pat = duplicateSingleQuotes(pat);
result.append(",select," + pat);
} else {
//result.append(", unknown");
}
result.append('}');
}
copyAndFixQuotes(pattern, lastOffset, pattern.length(), result);
return result.toString();
}
/**
* Double every single quote
*/
private String duplicateSingleQuotes(String pat) {
String result = pat;
if (pat.indexOf('\'') != 0) {
StringBuilder buf = new StringBuilder();
for (int j = 0; j < pat.length(); ++j) {
char ch = pat.charAt(j);
if (ch == '\'') {
buf.append(ch); // double it
}
buf.append(ch);
}
result = buf.toString();
}
return result;
}
/**
* Sets the formats to use for the values passed into
* <code>format</code> methods or returned from <code>parse</code>
* methods. The indices of elements in <code>newFormats</code>
* correspond to the argument indices used in the previously set
* pattern string.
* The order of formats in <code>newFormats</code> thus corresponds to
* the order of elements in the <code>arguments</code> array passed
* to the <code>format</code> methods or the result array returned
* by the <code>parse</code> methods.
* <p>
* If an argument index is used for more than one format element
* in the pattern string, then the corresponding new format is used
* for all such format elements. If an argument index is not used
* for any format element in the pattern string, then the
* corresponding new format is ignored. If fewer formats are provided
* than needed, then only the formats for argument indices less
* than <code>newFormats.length</code> are replaced.
*
* This method is only supported if the format does not use
* named arguments, otherwise an IllegalArgumentException is thrown.
*
* @param newFormats the new formats to use
* @throws NullPointerException if <code>newFormats</code> is null
* @throws IllegalArgumentException if this formatter uses named arguments
* @stable ICU 3.0
*/
public void setFormatsByArgumentIndex(Format[] newFormats) {
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use alphanumeric argument names.");
}
for (int i = 0; i <= maxOffset; i++) {
int j = Integer.parseInt(argumentNames[i]);
if (j < newFormats.length) {
formats[i] = newFormats[j];
}
}
}
/**
* {@icu} Sets the formats to use for the values passed into
* <code>format</code> methods or returned from <code>parse</code>
* methods. The keys in <code>newFormats</code> are the argument
* names in the previously set pattern string, and the values
* are the formats.
* <p>
* Only argument names from the pattern string are considered.
* Extra keys in <code>newFormats</code> that do not correspond
* to an argument name are ignored. Similarly, if there is no
* format in newFormats for an argument name, the formatter
* for that argument remains unchanged.
* <p>
* This may be called on formats that do not use named arguments.
* In this case the map will be queried for key Strings that
* represent argument indices, e.g. "0", "1", "2" etc.
*
* @param newFormats a map from String to Format providing new
* formats for named arguments.
* @stable ICU 3.8
*/
public void setFormatsByArgumentName(Map<String, Format> newFormats) {
for (int i = 0; i <= maxOffset; i++) {
if (newFormats.containsKey(argumentNames[i])) {
Format f = newFormats.get(argumentNames[i]);
formats[i] = f;
}
}
}
/**
* Sets the formats to use for the format elements in the
* previously set pattern string.
* The order of formats in <code>newFormats</code> corresponds to
* the order of format elements in the pattern string.
* <p>
* If more formats are provided than needed by the pattern string,
* the remaining ones are ignored. If fewer formats are provided
* than needed, then only the first <code>newFormats.length</code>
* formats are replaced.
* <p>
* Since the order of format elements in a pattern string often
* changes during localization, it is generally better to use the
* {@link #setFormatsByArgumentIndex setFormatsByArgumentIndex}
* method, which assumes an order of formats corresponding to the
* order of elements in the <code>arguments</code> array passed to
* the <code>format</code> methods or the result array returned by
* the <code>parse</code> methods.
*
* @param newFormats the new formats to use
* @exception NullPointerException if <code>newFormats</code> is null
* @stable ICU 3.0
*/
public void setFormats(Format[] newFormats) {
int runsToCopy = newFormats.length;
if (runsToCopy > maxOffset + 1) {
runsToCopy = maxOffset + 1;
}
for (int i = 0; i < runsToCopy; i++) {
formats[i] = newFormats[i];
}
}
/**
* Sets the format to use for the format elements within the
* previously set pattern string that use the given argument
* index.
* The argument index is part of the format element definition and
* represents an index into the <code>arguments</code> array passed
* to the <code>format</code> methods or the result array returned
* by the <code>parse</code> methods.
* <p>
* If the argument index is used for more than one format element
* in the pattern string, then the new format is used for all such
* format elements. If the argument index is not used for any format
* element in the pattern string, then the new format is ignored.
*
* This method is only supported when exclusively numbers are used for
* argument names. Otherwise an IllegalArgumentException is thrown.
*
* @param argumentIndex the argument index for which to use the new format
* @param newFormat the new format to use
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public void setFormatByArgumentIndex(int argumentIndex, Format newFormat) {
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use alphanumeric argument names.");
}
for (int j = 0; j <= maxOffset; j++) {
if (Integer.parseInt(argumentNames[j]) == argumentIndex) {
formats[j] = newFormat;
}
}
}
/**
* {@icu} Sets the format to use for the format elements within the
* previously set pattern string that use the given argument
* name.
* <p>
* If the argument name is used for more than one format element
* in the pattern string, then the new format is used for all such
* format elements. If the argument name is not used for any format
* element in the pattern string, then the new format is ignored.
* <p>
* This API may be used on formats that do not use named arguments.
* In this case <code>argumentName</code> should be a String that names
* an argument index, e.g. "0", "1", "2"... etc. If it does not name
* a valid index, the format will be ignored. No error is thrown.
*
* @param argumentName the name of the argument to change
* @param newFormat the new format to use
* @stable ICU 3.8
*/
public void setFormatByArgumentName(String argumentName, Format newFormat) {
for (int i = 0; i <= maxOffset; ++i) {
if (argumentName.equals(argumentNames[i])) {
formats[i] = newFormat;
}
}
}
/**
* Sets the format to use for the format element with the given
* format element index within the previously set pattern string.
* The format element index is the zero-based number of the format
* element counting from the start of the pattern string.
* <p>
* Since the order of format elements in a pattern string often
* changes during localization, it is generally better to use the
* {@link #setFormatByArgumentIndex setFormatByArgumentIndex}
* method, which accesses format elements based on the argument
* index they specify.
*
* @param formatElementIndex the index of a format element within the pattern
* @param newFormat the format to use for the specified format element
* @exception ArrayIndexOutOfBoundsException if formatElementIndex is equal to or
* larger than the number of format elements in the pattern string
* @stable ICU 3.0
*/
public void setFormat(int formatElementIndex, Format newFormat) {
formats[formatElementIndex] = newFormat;
}
/**
* Returns the formats used for the values passed into
* <code>format</code> methods or returned from <code>parse</code>
* methods. The indices of elements in the returned array
* correspond to the argument indices used in the previously set
* pattern string.
* The order of formats in the returned array thus corresponds to
* the order of elements in the <code>arguments</code> array passed
* to the <code>format</code> methods or the result array returned
* by the <code>parse</code> methods.
* <p>
* If an argument index is used for more than one format element
* in the pattern string, then the format used for the last such
* format element is returned in the array. If an argument index
* is not used for any format element in the pattern string, then
* null is returned in the array.
*
* This method is only supported when exclusively numbers are used for
* argument names. Otherwise an IllegalArgumentException is thrown.
*
* @return the formats used for the arguments within the pattern
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public Format[] getFormatsByArgumentIndex() {
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use alphanumeric argument names.");
}
int maximumArgumentNumber = -1;
for (int i = 0; i <= maxOffset; i++) {
int argumentNumber = Integer.parseInt(argumentNames[i]);
if (argumentNumber > maximumArgumentNumber) {
maximumArgumentNumber = argumentNumber;
}
}
Format[] resultArray = new Format[maximumArgumentNumber + 1];
for (int i = 0; i <= maxOffset; i++) {
resultArray[Integer.parseInt(argumentNames[i])] = formats[i];
}
return resultArray;
}
// TODO: provide method public Map getFormatsByArgumentName().
// Where Map is: String argumentName --> Format format.
/**
* Returns the formats used for the format elements in the
* previously set pattern string.
* The order of formats in the returned array corresponds to
* the order of format elements in the pattern string.
* <p>
* Since the order of format elements in a pattern string often
* changes during localization, it's generally better to use the
* {@link #getFormatsByArgumentIndex()}
* method, which assumes an order of formats corresponding to the
* order of elements in the <code>arguments</code> array passed to
* the <code>format</code> methods or the result array returned by
* the <code>parse</code> methods.
*
* This method is only supported when exclusively numbers are used for
* argument names. Otherwise an IllegalArgumentException is thrown.
*
* @return the formats used for the format elements in the pattern
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public Format[] getFormats() {
Format[] resultArray = new Format[maxOffset + 1];
System.arraycopy(formats, 0, resultArray, 0, maxOffset + 1);
return resultArray;
}
/**
* {@icu} Returns the format argument names. For more details, see
* {@link #setFormatByArgumentName(String, Format)}.
* @return List of names
* @internal
* @deprecated This API is ICU internal only.
*/
public Set<String> getFormatArgumentNames() {
Set<String> result = new HashSet<String>();
for (int i = 0; i <= maxOffset; ++i) {
result.add(argumentNames[i]);
}
return result;
}
/**
* {@icu} Returns the formats according to their argument names. For more details, see
* {@link #setFormatByArgumentName(String, Format)}.
* @return format associated with the name, or null if there isn't one.
* @internal
* @deprecated This API is ICU internal only.
*/
public Format getFormatByArgumentName(String argumentName) {
for (int i = 0; i <= maxOffset; ++i) {
if (argumentName.equals(argumentNames[i])) {
return formats[i];
}
}
return null;
}
/**
* Formats an array of objects and appends the <code>MessageFormat</code>'s
* pattern, with format elements replaced by the formatted objects, to the
* provided <code>StringBuffer</code>.
* <p>
* The text substituted for the individual format elements is derived from
* the current subformat of the format element and the
* <code>arguments</code> element at the format element's argument index
* as indicated by the first matching line of the following table. An
* argument is <i>unavailable</i> if <code>arguments</code> is
* <code>null</code> or has fewer than argumentIndex+1 elements. When
* an argument is unavailable no substitution is performed.
* <p>
* <table border=1>
* <tr>
* <th>Subformat
* <th>Argument
* <th>Formatted Text
* <tr>
* <td><i>any</i>
* <td><i>unavailable</i>
* <td><code>"{" + argumentIndex + "}"</code>
* <tr>
* <td><i>any</i>
* <td><code>null</code>
* <td><code>"null"</code>
* <tr>
* <td><code>instanceof ChoiceFormat</code>
* <td><i>any</i>
* <td><code>subformat.format(argument).indexOf('{') >= 0 ?<br>
* (new MessageFormat(subformat.format(argument), getLocale())).format(argument) :
* subformat.format(argument)</code>
* <tr>
* <td><code>!= null</code>
* <td><i>any</i>
* <td><code>subformat.format(argument)</code>
* <tr>
* <td><code>null</code>
* <td><code>instanceof Number</code>
* <td><code>NumberFormat.getInstance(getLocale()).format(argument)</code>
* <tr>
* <td><code>null</code>
* <td><code>instanceof Date</code>
* <td><code>DateFormat.getDateTimeInstance(DateFormat.SHORT,
* DateFormat.SHORT, getLocale()).format(argument)</code>
* <tr>
* <td><code>null</code>
* <td><code>instanceof String</code>
* <td><code>argument</code>
* <tr>
* <td><code>null</code>
* <td><i>any</i>
* <td><code>argument.toString()</code>
* </table>
* <p>
* If <code>pos</code> is non-null, and refers to
* <code>Field.ARGUMENT</code>, the location of the first formatted
* string will be returned.
*
* This method is only supported when the format does not use named
* arguments, otherwise an IllegalArgumentException is thrown.
*
* @param arguments an array of objects to be formatted and substituted.
* @param result where text is appended.
* @param pos On input: an alignment field, if desired.
* On output: the offsets of the alignment field.
* @throws IllegalArgumentException if an argument in the
* <code>arguments</code> array is not of the type
* expected by the format element(s) that use it.
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public final StringBuffer format(Object[] arguments, StringBuffer result,
FieldPosition pos)
{
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use alphanumeric argument names.");
}
return subformat(arguments, result, pos, null);
}
/**
* Formats a map of objects and appends the <code>MessageFormat</code>'s
* pattern, with format elements replaced by the formatted objects, to the
* provided <code>StringBuffer</code>.
* <p>
* The text substituted for the individual format elements is derived from
* the current subformat of the format element and the
* <code>arguments</code> value corresopnding to the format element's
* argument name.
* <p>
* This API may be called on formats that do not use named arguments.
* In this case the the keys in <code>arguments</code> must be numeric
* strings (e.g. "0", "1", "2"...).
* <p>
* An argument is <i>unavailable</i> if <code>arguments</code> is
* <code>null</code> or does not have a value corresponding to an argument
* name in the pattern. When an argument is unavailable no substitution
* is performed.
*
* @param arguments a map of objects to be formatted and substituted.
* @param result where text is appended.
* @param pos On input: an alignment field, if desired.
* On output: the offsets of the alignment field.
* @throws IllegalArgumentException if an argument in the
* <code>arguments</code> array is not of the type
* expected by the format element(s) that use it.
* @return the passed-in StringBuffer
* @stable ICU 3.8
*/
public final StringBuffer format(Map<String, Object> arguments, StringBuffer result,
FieldPosition pos) {
return subformat(arguments, result, pos, null);
}
/**
* Creates a MessageFormat with the given pattern and uses it
* to format the given arguments. This is equivalent to
* <blockquote>
* <code>(new {@link #MessageFormat(String) MessageFormat}(pattern)).{@link
* #format(java.lang.Object[], java.lang.StringBuffer, java.text.FieldPosition)
* format}(arguments, new StringBuffer(), null).toString()</code>
* </blockquote>
*
* @throws IllegalArgumentException if the pattern is invalid,
* or if an argument in the <code>arguments</code> array
* is not of the type expected by the format element(s)
* that use it.
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public static String format(String pattern, Object[] arguments) {
MessageFormat temp = new MessageFormat(pattern);
return temp.format(arguments);
}
/**
* Creates a MessageFormat with the given pattern and uses it to
* format the given arguments. The pattern must identifyarguments
* by name instead of by number.
* <p>
* @throws IllegalArgumentException if the pattern is invalid,
* or if an argument in the <code>arguments</code> map
* is not of the type expected by the format element(s)
* that use it.
* @see #format(Map, StringBuffer, FieldPosition)
* @see #format(String, Object[])
* @stable ICU 3.8
*/
public static String format(String pattern, Map<String, Object> arguments) {
MessageFormat temp = new MessageFormat(pattern);
return temp.format(arguments);
}
/**
* {@icu} Returns true if this MessageFormat uses named arguments,
* and false otherwise. See class description.
*
* @return true if named arguments are used.
* @stable ICU 3.8
*/
public boolean usesNamedArguments() {
return !argumentNamesAreNumeric;
}
// Overrides
/**
* Formats a map or array of objects and appends the <code>MessageFormat</code>'s
* pattern, with format elements replaced by the formatted objects, to the
* provided <code>StringBuffer</code>.
* This is equivalent to either of
* <blockquote>
* <code>{@link #format(java.lang.Object[], java.lang.StringBuffer,
* java.text.FieldPosition) format}((Object[]) arguments, result, pos)</code>
* <code>{@link #format(java.util.Map, java.lang.StringBuffer,
* java.text.FieldPosition) format}((Map) arguments, result, pos)</code>
* </blockquote>
* A map must be provided if this format uses named arguments, otherwise
* an IllegalArgumentException will be thrown.
* @param arguments a map or array of objects to be formatted
* @param result where text is appended
* @param pos On input: an alignment field, if desired
* On output: the offsets of the alignment field
* @throws IllegalArgumentException if an argument in
* <code>arguments</code> is not of the type
* expected by the format element(s) that use it
* @throws IllegalArgumentException if <code>arguments<code> is
* an array of Object and this format uses named arguments
* @stable ICU 3.0
*/
@SuppressWarnings("unchecked")
public final StringBuffer format(Object arguments, StringBuffer result,
FieldPosition pos)
{
if ((arguments == null || arguments instanceof Map)) {
return subformat((Map<String, Object>)arguments, result, pos, null);
} else {
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use alphanumeric argument names.");
}
return subformat((Object[]) arguments, result, pos, null);
}
}
/**
* Formats an array of objects and inserts them into the
* <code>MessageFormat</code>'s pattern, producing an
* <code>AttributedCharacterIterator</code>.
* You can use the returned <code>AttributedCharacterIterator</code>
* to build the resulting String, as well as to determine information
* about the resulting String.
* <p>
* The text of the returned <code>AttributedCharacterIterator</code> is
* the same that would be returned by
* <blockquote>
* <code>{@link #format(java.lang.Object[], java.lang.StringBuffer,
* java.text.FieldPosition) format}(arguments, new StringBuffer(), null).toString()</code>
* </blockquote>
* <p>
* In addition, the <code>AttributedCharacterIterator</code> contains at
* least attributes indicating where text was generated from an
* argument in the <code>arguments</code> array. The keys of these attributes are of
* type <code>MessageFormat.Field</code>, their values are
* <code>Integer</code> objects indicating the index in the <code>arguments</code>
* array of the argument from which the text was generated.
* <p>
* The attributes/value from the underlying <code>Format</code>
* instances that <code>MessageFormat</code> uses will also be
* placed in the resulting <code>AttributedCharacterIterator</code>.
* This allows you to not only find where an argument is placed in the
* resulting String, but also which fields it contains in turn.
*
* @param arguments an array of objects to be formatted and substituted.
* @return AttributedCharacterIterator describing the formatted value.
* @exception NullPointerException if <code>arguments</code> is null.
* @exception IllegalArgumentException if an argument in the
* <code>arguments</code> array is not of the type
* expected by the format element(s) that use it.
* @stable ICU 3.8
*/
@SuppressWarnings("unchecked")
public AttributedCharacterIterator formatToCharacterIterator(Object arguments) {
StringBuffer result = new StringBuffer();
ArrayList<AttributedCharacterIterator> iterators =
new ArrayList<AttributedCharacterIterator>();
if (arguments == null) {
throw new NullPointerException(
"formatToCharacterIterator must be passed non-null object");
}
if (arguments instanceof Map) {
subformat((Map<String, Object>)arguments, result, null, iterators);
} else {
subformat((Object[]) arguments, result, null, iterators);
}
if (iterators.size() == 0) {
return _createAttributedCharacterIterator("");
}
return _createAttributedCharacterIterator(
iterators.toArray(new AttributedCharacterIterator[iterators.size()]));
}
/**
* Parses the string.
*
* <p>Caveats: The parse may fail in a number of circumstances.
* For example:
* <ul>
* <li>If one of the arguments does not occur in the pattern.
* <li>If the format of an argument loses information, such as
* with a choice format where a large number formats to "many".
* <li>Does not yet handle recursion (where
* the substituted strings contain {n} references.)
* <li>Will not always find a match (or the correct match)
* if some part of the parse is ambiguous.
* For example, if the pattern "{1},{2}" is used with the
* string arguments {"a,b", "c"}, it will format as "a,b,c".
* When the result is parsed, it will return {"a", "b,c"}.
* <li>If a single argument is parsed more than once in the string,
* then the later parse wins.
* </ul>
* When the parse fails, use ParsePosition.getErrorIndex() to find out
* where in the string did the parsing failed. The returned error
* index is the starting offset of the sub-patterns that the string
* is comparing with. For example, if the parsing string "AAA {0} BBB"
* is comparing against the pattern "AAD {0} BBB", the error index is
* 0. When an error occurs, the call to this method will return null.
* If the source is null, return an empty array.
* <p>
* This method is only supported with numbered arguments. If
* the format pattern used named argument an
* IllegalArgumentException is thrown.
*
* @throws IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public Object[] parse(String source, ParsePosition pos) {
if (!argumentNamesAreNumeric) {
throw new IllegalArgumentException(
"This method is not available in MessageFormat objects " +
"that use named argument.");
}
Map<String, Object> objectMap = parseToMap(source, pos);
int maximumArgumentNumber = -1;
for (int i = 0; i <= maxOffset; i++) {
int argumentNumber = Integer.parseInt(argumentNames[i]);
if (argumentNumber > maximumArgumentNumber) {
maximumArgumentNumber = argumentNumber;
}
}
if (objectMap == null) {
return null;
}
Object[] resultArray = new Object[maximumArgumentNumber + 1];
for (String key : objectMap.keySet()) {
resultArray[Integer.parseInt(key)] = objectMap.get(key);
}
return resultArray;
}
/**
* {@icu} Parses the string, returning the results in a Map.
* This is similar to the version that returns an array
* of Object. This supports both named and numbered
* arguments-- if numbered, the keys in the map are the
* corresponding Strings (e.g. "0", "1", "2"...).
*
* @param source the text to parse
* @param pos the position at which to start parsing. on return,
* contains the result of the parse.
* @return a Map containing key/value pairs for each parsed argument.
* @stable ICU 3.8
*/
public Map<String, Object> parseToMap(String source, ParsePosition pos) {
if (source == null) {
Map<String, Object> empty = new HashMap<String, Object>();
return empty;
}
Map<String, Object> resultMap = new HashMap<String, Object>();
int patternOffset = 0;
int sourceOffset = pos.getIndex();
ParsePosition tempStatus = new ParsePosition(0);
for (int i = 0; i <= maxOffset; ++i) {
// match up to format
int len = offsets[i] - patternOffset;
if (len == 0 || pattern.regionMatches(patternOffset,
source, sourceOffset, len)) {
sourceOffset += len;
patternOffset += len;
} else {
pos.setErrorIndex(sourceOffset);
return null; // leave index as is to signal error
}
// now use format
if (formats[i] == null) { // string format
// if at end, use longest possible match
// otherwise uses first match to intervening string
// does NOT recursively try all possibilities
int tempLength = (i != maxOffset) ? offsets[i+1] : pattern.length();
int next;
if (patternOffset >= tempLength) {
next = source.length();
}else{
next = source.indexOf( pattern.substring(patternOffset,tempLength), sourceOffset);
}
if (next < 0) {
pos.setErrorIndex(sourceOffset);
return null; // leave index as is to signal error
} else {
String strValue = source.substring(sourceOffset, next);
if (!strValue.equals("{" + argumentNames[i] + "}"))
resultMap.put(argumentNames[i], source.substring(sourceOffset, next));
// resultArray[Integer.parseInt(argumentNames[i])] =
// source.substring(sourceOffset, next);
sourceOffset = next;
}
} else {
tempStatus.setIndex(sourceOffset);
resultMap.put(argumentNames[i], formats[i].parseObject(source, tempStatus));
// resultArray[Integer.parseInt(argumentNames[i])] =
// formats[i].parseObject(source, tempStatus);
if (tempStatus.getIndex() == sourceOffset) {
pos.setErrorIndex(sourceOffset);
return null; // leave index as is to signal error
}
sourceOffset = tempStatus.getIndex(); // update
}
}
int len = pattern.length() - patternOffset;
if (len == 0 || pattern.regionMatches(patternOffset,
source, sourceOffset, len)) {
pos.setIndex(sourceOffset + len);
} else {
pos.setErrorIndex(sourceOffset);
return null; // leave index as is to signal error
}
return resultMap;
}
/**
* Parses text from the beginning of the given string to produce an object
* array.
* The method may not use the entire text of the given string.
* <p>
* See the {@link #parse(String, ParsePosition)} method for more information
* on message parsing.
*
* @param source A <code>String</code> whose beginning should be parsed.
* @return An <code>Object</code> array parsed from the string.
* @exception ParseException if the beginning of the specified string cannot be parsed.
* @exception IllegalArgumentException if this format uses named arguments
* @stable ICU 3.0
*/
public Object[] parse(String source) throws ParseException {
ParsePosition pos = new ParsePosition(0);
Object[] result = parse(source, pos);
if (pos.getIndex() == 0) // unchanged, returned object is null
throw new ParseException("MessageFormat parse error!",
pos.getErrorIndex());
return result;
}
/**
* {@icu} Parses text from the beginning of the given string to produce a map from
* argument to values. The method may not use the entire text of the given string.
*
* <p>See the {@link #parse(String, ParsePosition)} method for more information on
* message parsing.
*
* @param source A <code>String</code> whose beginning should be parsed.
* @return A <code>Map</code> parsed from the string.
* @throws ParseException if the beginning of the specified string cannot
* be parsed.
* @see #parseToMap(String, ParsePosition)
* @stable ICU 3.8
*/
public Map<String, Object> parseToMap(String source) throws ParseException {
ParsePosition pos = new ParsePosition(0);
Map<String, Object> result = parseToMap(source, pos);
if (pos.getIndex() == 0) // unchanged, returned object is null
throw new ParseException("MessageFormat parse error!",
pos.getErrorIndex());
return result;
}
/**
* Parses text from a string to produce an object array or Map.
* <p>
* The method attempts to parse text starting at the index given by
* <code>pos</code>.
* If parsing succeeds, then the index of <code>pos</code> is updated
* to the index after the last character used (parsing does not necessarily
* use all characters up to the end of the string), and the parsed
* object array is returned. The updated <code>pos</code> can be used to
* indicate the starting point for the next call to this method.
* If an error occurs, then the index of <code>pos</code> is not
* changed, the error index of <code>pos</code> is set to the index of
* the character where the error occurred, and null is returned.
* <p>
* See the {@link #parse(String, ParsePosition)} method for more information
* on message parsing.
*
* @param source A <code>String</code>, part of which should be parsed.
* @param pos A <code>ParsePosition</code> object with index and error
* index information as described above.
* @return An <code>Object</code> parsed from the string, either an
* array of Object, or a Map, depending on whether named
* arguments are used. This can be queried using <code>usesNamedArguments</code>.
* In case of error, returns null.
* @throws NullPointerException if <code>pos</code> is null.
* @stable ICU 3.0
*/
public Object parseObject(String source, ParsePosition pos) {
if (argumentNamesAreNumeric) {
return parse(source, pos);
} else {
return parseToMap(source, pos);
}
}
/**
* Overrides clone.
*
* @return a clone of this instance.
* @stable ICU 3.0
*/
public Object clone() {
MessageFormat other = (MessageFormat) super.clone();
// clone arrays. Can't do with utility because of bug in Cloneable
other.formats = formats.clone(); // shallow clone
for (int i = 0; i < formats.length; ++i) {
if (formats[i] != null)
other.formats[i] = (Format) formats[i].clone();
}
// for primitives or immutables, shallow clone is enough
other.offsets = offsets.clone();
other.argumentNames = argumentNames.clone();
other.argumentNamesAreNumeric = argumentNamesAreNumeric;
return other;
}
/**
* Overrides equals.
* @stable ICU 3.0
*/
public boolean equals(Object obj) {
if (this == obj) // quick check
return true;
if (obj == null || getClass() != obj.getClass())
return false;
MessageFormat other = (MessageFormat) obj;
return (maxOffset == other.maxOffset
&& pattern.equals(other.pattern)
&& Utility.objectEquals(ulocale, other.ulocale) // does null check
&& Utility.arrayEquals(offsets, other.offsets)
&& Utility.arrayEquals(argumentNames, other.argumentNames)
&& Utility.arrayEquals(formats, other.formats)
&& (argumentNamesAreNumeric == other.argumentNamesAreNumeric));
}
/**
* Overrides hashCode.
* @stable ICU 3.0
*/
public int hashCode() {
return pattern.hashCode(); // enough for reasonable distribution
}
/**
* Defines constants that are used as attribute keys in the
* <code>AttributedCharacterIterator</code> returned
* from <code>MessageFormat.formatToCharacterIterator</code>.
*
* @stable ICU 3.8
*/
public static class Field extends Format.Field {
private static final long serialVersionUID = 7510380454602616157L;
/**
* Create a <code>Field</code> with the specified name.
*
* @param name The name of the attribute
*
* @stable ICU 3.8
*/
protected Field(String name) {
super(name);
}
/**
* Resolves instances being deserialized to the predefined constants.
*
* @return resolved MessageFormat.Field constant
* @throws InvalidObjectException if the constant could not be resolved.
*
* @stable ICU 3.8
*/
protected Object readResolve() throws InvalidObjectException {
if (this.getClass() != MessageFormat.Field.class) {
throw new InvalidObjectException(
"A subclass of MessageFormat.Field must implement readResolve.");
}
if (this.getName().equals(ARGUMENT.getName())) {
return ARGUMENT;
} else {
throw new InvalidObjectException("Unknown attribute name.");
}
}
/**
* Constant identifying a portion of a message that was generated
* from an argument passed into <code>formatToCharacterIterator</code>.
* The value associated with the key will be an <code>Integer</code>
* indicating the index in the <code>arguments</code> array of the
* argument from which the text was generated.
*
* @stable ICU 3.8
*/
public static final Field ARGUMENT = new Field("message argument field");
}
// ===========================privates============================
/**
* The locale to use for formatting numbers and dates.
* This is no longer used, and here only for serialization compatibility.
* @serial
*/
private Locale locale;
/**
* The locale to use for formatting numbers and dates.
* @serial
*/
private ULocale ulocale;
/**
* The string that the formatted values are to be plugged into. In other words, this
* is the pattern supplied on construction with all of the {} expressions taken out.
* @serial
*/
private String pattern = "";
/** The initially expected number of subformats in the format */
private static final int INITIAL_FORMATS = 10;
/**
* An array of formatters, which are used to format the arguments.
* @serial
*/
private Format[] formats = new Format[INITIAL_FORMATS];
/**
* The positions where the results of formatting each argument are to be
* inserted into the pattern.
*
* @serial
*/
private int[] offsets = new int[INITIAL_FORMATS];
/**
* The argument numbers corresponding to each formatter. (The formatters are stored
* in the order they occur in the pattern, not in the order in which the arguments
* are specified.)
* @serial
*/
// retained for backwards compatibility
private int[] argumentNumbers = new int[INITIAL_FORMATS];
/**
* The argument names corresponding to each formatter. (The formatters are
* stored in the order they occur in the pattern, not in the order in which
* the arguments are specified.)
*
* @serial
*/
private String[] argumentNames = new String[INITIAL_FORMATS];
/**
* Is true iff all argument names are non-negative numbers.
*
* @serial
*/
private boolean argumentNamesAreNumeric = true;
/**
* One less than the number of entries in <code>offsets</code>. Can also be thought of
* as the index of the highest-numbered element in <code>offsets</code> that is being used.
* All of these arrays should have the same number of elements being used as <code>offsets</code>
* does, and so this variable suffices to tell us how many entries are in all of them.
* @serial
*/
private int maxOffset = -1;
/**
* Internal routine used by format. If <code>characterIterators</code> is
* non-null, AttributedCharacterIterator will be created from the
* subformats as necessary. If <code>characterIterators</code> is null
* and <code>fp</code> is non-null and identifies
* <code>Field.MESSAGE_ARGUMENT</code>, the location of
* the first replaced argument will be set in it.
*
* @exception IllegalArgumentException if an argument in the
* <code>arguments</code> array is not of the type
* expected by the format element(s) that use it.
*/
private StringBuffer subformat(Object[] arguments, StringBuffer result,
FieldPosition fp, List<AttributedCharacterIterator> characterIterators) {
return subformat(arrayToMap(arguments), result, fp, characterIterators);
}
/**
* Internal routine used by format.
*
* @throws IllegalArgumentException if an argument in the
* <code>arguments</code> map is not of the type
* expected by the format element(s) that use it.
*/
private StringBuffer subformat(Map<String, Object> arguments, StringBuffer result,
FieldPosition fp, List<AttributedCharacterIterator> characterIterators) {
// note: this implementation assumes a fast substring & index.
// if this is not true, would be better to append chars one by one.
int lastOffset = 0;
int last = result.length();
for (int i = 0; i <= maxOffset; ++i) {
result.append(pattern.substring(lastOffset, offsets[i]));
lastOffset = offsets[i];
String argumentName = argumentNames[i];
if (arguments == null || !arguments.containsKey(argumentName)) {
result.append("{" + argumentName + "}");
continue;
}
// int argRecursion = ((recursionProtection >> (argumentNumber*2)) & 0x3);
//Eclipse stated the following is "dead code"
/*if (false) { // if (argRecursion == 3){
// prevent loop!!!
result.append('\uFFFD');
} else*/ {
Object obj = arguments.get(argumentName);
String arg = null;
Format subFormatter = null;
if (obj == null) {
arg = "null";
} else if (formats[i] != null) {
subFormatter = formats[i];
if (subFormatter instanceof ChoiceFormat
|| subFormatter instanceof PluralFormat
|| subFormatter instanceof SelectFormat) {
arg = formats[i].format(obj);
// TODO: This should be made more robust.
// Does this work with '{' in quotes?
if (arg.indexOf('{') >= 0) {
subFormatter = new MessageFormat(arg, ulocale);
obj = arguments;
arg = null;
}
}
} else if (obj instanceof Number) {
// format number if can
subFormatter = NumberFormat.getInstance(ulocale);
} else if (obj instanceof Date) {
// format a Date if can
subFormatter = DateFormat.getDateTimeInstance(
DateFormat.SHORT, DateFormat.SHORT, ulocale);//fix
} else if (obj instanceof String) {
arg = (String) obj;
} else {
arg = obj.toString();
if (arg == null) arg = "null";
}
// At this point we are in two states, either subFormatter
// is non-null indicating we should format obj using it,
// or arg is non-null and we should use it as the value.
if (characterIterators != null) {
// If characterIterators is non-null, it indicates we need
// to get the CharacterIterator from the child formatter.
if (last != result.length()) {
characterIterators.add(
_createAttributedCharacterIterator(result.substring
(last)));
last = result.length();
}
if (subFormatter != null) {
AttributedCharacterIterator subIterator =
subFormatter.formatToCharacterIterator(obj);
append(result, subIterator);
if (last != result.length()) {
characterIterators.add(
_createAttributedCharacterIterator(
subIterator, Field.ARGUMENT,
argumentNamesAreNumeric ?
(Object)new Integer(argumentName) :
(Object)argumentName));
last = result.length();
}
arg = null;
}
if (arg != null && arg.length() > 0) {
result.append(arg);
characterIterators.add(
_createAttributedCharacterIterator(
arg, Field.ARGUMENT,
argumentNamesAreNumeric ?
(Object)new Integer(argumentName) :
(Object)argumentName));
last = result.length();
}
} else {
if (subFormatter != null) {
arg = subFormatter.format(obj);
}
last = result.length();
result.append(arg);
if (i == 0 && fp != null && Field.ARGUMENT.equals(
fp.getFieldAttribute())) {
fp.setBeginIndex(last);
fp.setEndIndex(result.length());
}
last = result.length();
}
}
}
result.append(pattern.substring(lastOffset, pattern.length()));
if (characterIterators != null && last != result.length()) {
characterIterators.add(_createAttributedCharacterIterator(
result.substring(last)));
}
return result;
}
/**
* Convenience method to append all the characters in
* <code>iterator</code> to the StringBuffer <code>result</code>.
*/
private void append(StringBuffer result, CharacterIterator iterator) {
if (iterator.first() != CharacterIterator.DONE) {
char aChar;
result.append(iterator.first());
while ((aChar = iterator.next()) != CharacterIterator.DONE) {
result.append(aChar);
}
}
}
private static final String[] typeList =
{"", "number", "date", "time", "choice", "spellout", "ordinal",
"duration", "plural", "select" };
private static final int
TYPE_EMPTY = 0,
TYPE_NUMBER = 1,
TYPE_DATE = 2,
TYPE_TIME = 3,
TYPE_CHOICE = 4,
TYPE_SPELLOUT = 5,
TYPE_ORDINAL = 6,
TYPE_DURATION = 7,
TYPE_PLURAL = 8,
TYPE_SELECT = 9;
private static final String[] modifierList =
{"", "currency", "percent", "integer"};
private static final int
MODIFIER_EMPTY = 0,
MODIFIER_CURRENCY = 1,
MODIFIER_PERCENT = 2,
MODIFIER_INTEGER = 3;
private static final String[] dateModifierList =
{"", "short", "medium", "long", "full"};
private static final int
DATE_MODIFIER_EMPTY = 0,
DATE_MODIFIER_SHORT = 1,
DATE_MODIFIER_MEDIUM = 2,
DATE_MODIFIER_LONG = 3,
DATE_MODIFIER_FULL = 4;
private void makeFormat(int position, int offsetNumber,
StringBuilder[] segments)
{
// get the argument number
// int argumentNumber;
// try {
// argumentNumber = Integer.parseInt(segments[1].toString()); // always unlocalized!
// } catch (NumberFormatException e) {
// throw new IllegalArgumentException("can't parse argument number "
// + segments[1]);
//}
// if (argumentNumber < 0) {
// throw new IllegalArgumentException("negative argument number "
// + argumentNumber);
//}
// resize format information arrays if necessary
if (offsetNumber >= formats.length) {
int newLength = formats.length * 2;
Format[] newFormats = new Format[newLength];
int[] newOffsets = new int[newLength];
String[] newArgumentNames = new String[newLength];
System.arraycopy(formats, 0, newFormats, 0, maxOffset + 1);
System.arraycopy(offsets, 0, newOffsets, 0, maxOffset + 1);
System.arraycopy(argumentNames, 0, newArgumentNames, 0,
maxOffset + 1);
formats = newFormats;
offsets = newOffsets;
argumentNames = newArgumentNames;
}
int oldMaxOffset = maxOffset;
maxOffset = offsetNumber;
offsets[offsetNumber] = segments[0].length();
argumentNames[offsetNumber] = segments[1].toString();
// All argument names numeric ?
int argumentNumber;
try {
// always unlocalized!
argumentNumber = Integer.parseInt(segments[1].toString());
} catch (NumberFormatException e) {
argumentNumber = -1;
}
if (offsetNumber == 0) {
// First argument determines whether all argument identifiers have
// to be numbers or (IDStartChars IDContChars*) strings.
argumentNamesAreNumeric = argumentNumber >= 0;
}
if (argumentNamesAreNumeric && argumentNumber < 0 ||
!argumentNamesAreNumeric &&
!isAlphaIdentifier(argumentNames[offsetNumber])) {
throw new IllegalArgumentException(
"All argument identifiers have to be either non-negative " +
"numbers or strings following the pattern " +
"([:ID_Start:] [:ID_Continue:]*).\n" +
"For more details on these unicode sets, visit " +
"http://demo.icu-project.org/icu-bin/ubrowse");
}
// now get the format
Format newFormat = null;
int subformatType = findKeyword(segments[2].toString(), typeList);
switch (subformatType){
case TYPE_EMPTY:
break;
case TYPE_NUMBER:
switch (findKeyword(segments[3].toString(), modifierList)) {
case MODIFIER_EMPTY:
newFormat = NumberFormat.getInstance(ulocale);
break;
case MODIFIER_CURRENCY:
newFormat = NumberFormat.getCurrencyInstance(ulocale);
break;
case MODIFIER_PERCENT:
newFormat = NumberFormat.getPercentInstance(ulocale);
break;
case MODIFIER_INTEGER:
newFormat = NumberFormat.getIntegerInstance(ulocale);
break;
default: // pattern
newFormat = new DecimalFormat(segments[3].toString(),
new DecimalFormatSymbols(ulocale));
break;
}
break;
case TYPE_DATE:
switch (findKeyword(segments[3].toString(), dateModifierList)) {
case DATE_MODIFIER_EMPTY:
newFormat = DateFormat.getDateInstance(DateFormat.DEFAULT, ulocale);
break;
case DATE_MODIFIER_SHORT:
newFormat = DateFormat.getDateInstance(DateFormat.SHORT, ulocale);
break;
case DATE_MODIFIER_MEDIUM:
newFormat = DateFormat.getDateInstance(DateFormat.DEFAULT, ulocale);
break;
case DATE_MODIFIER_LONG:
newFormat = DateFormat.getDateInstance(DateFormat.LONG, ulocale);
break;
case DATE_MODIFIER_FULL:
newFormat = DateFormat.getDateInstance(DateFormat.FULL, ulocale);
break;
default:
newFormat = new SimpleDateFormat(segments[3].toString(), ulocale);
break;
}
break;
case TYPE_TIME:
switch (findKeyword(segments[3].toString(), dateModifierList)) {
case DATE_MODIFIER_EMPTY:
newFormat = DateFormat.getTimeInstance(DateFormat.DEFAULT, ulocale);
break;
case DATE_MODIFIER_SHORT:
newFormat = DateFormat.getTimeInstance(DateFormat.SHORT, ulocale);
break;
case DATE_MODIFIER_MEDIUM:
newFormat = DateFormat.getTimeInstance(DateFormat.DEFAULT, ulocale);
break;
case DATE_MODIFIER_LONG:
newFormat = DateFormat.getTimeInstance(DateFormat.LONG, ulocale);
break;
case DATE_MODIFIER_FULL:
newFormat = DateFormat.getTimeInstance(DateFormat.FULL, ulocale);
break;
default:
newFormat = new SimpleDateFormat(segments[3].toString(), ulocale);
break;
}
break;
case TYPE_CHOICE:
try {
newFormat = new ChoiceFormat(segments[3].toString());
} catch (Exception e) {
maxOffset = oldMaxOffset;
throw new IllegalArgumentException("Choice Pattern incorrect");
}
break;
case TYPE_SPELLOUT:
{
RuleBasedNumberFormat rbnf = new RuleBasedNumberFormat(ulocale,
RuleBasedNumberFormat.SPELLOUT);
String ruleset = segments[3].toString().trim();
if (ruleset.length() != 0) {
try {
rbnf.setDefaultRuleSet(ruleset);
}
catch (Exception e) {
// warn invalid ruleset
}
}
newFormat = rbnf;
}
break;
case TYPE_ORDINAL:
{
RuleBasedNumberFormat rbnf = new RuleBasedNumberFormat(ulocale,
RuleBasedNumberFormat.ORDINAL);
String ruleset = segments[3].toString().trim();
if (ruleset.length() != 0) {
try {
rbnf.setDefaultRuleSet(ruleset);
}
catch (Exception e) {
// warn invalid ruleset
}
}
newFormat = rbnf;
}
break;
case TYPE_DURATION:
{
RuleBasedNumberFormat rbnf = new RuleBasedNumberFormat(ulocale,
RuleBasedNumberFormat.DURATION);
String ruleset = segments[3].toString().trim();
if (ruleset.length() != 0) {
try {
rbnf.setDefaultRuleSet(ruleset);
}
catch (Exception e) {
// warn invalid ruleset
}
}
newFormat = rbnf;
}
break;
case TYPE_PLURAL:
case TYPE_SELECT:
{
// PluralFormat and SelectFormat does not handle quotes.
// Remove quotes.
// TODO: Should PluralFormat and SelectFormat handle quotes?
StringBuilder unquotedPattern = new StringBuilder();
String quotedPattern = segments[3].toString();
boolean inQuote = false;
for (int i = 0; i < quotedPattern.length(); ++i) {
char ch = quotedPattern.charAt(i);
if (ch == '\'') {
if (i+1 < quotedPattern.length() &&
quotedPattern.charAt(i+1) == '\'') {
unquotedPattern.append(ch);
++i;
} else {
inQuote = !inQuote;
}
} else {
unquotedPattern.append(ch);
}
}
if( subformatType == TYPE_PLURAL){
PluralFormat pls = new PluralFormat(ulocale,
unquotedPattern.toString());
newFormat = pls;
}else{
newFormat = new SelectFormat( unquotedPattern.toString());
}
}
break;
default:
maxOffset = oldMaxOffset;
throw new IllegalArgumentException("unknown format type at ");
}
formats[offsetNumber] = newFormat;
segments[1].setLength(0); // throw away other segments
segments[2].setLength(0);
segments[3].setLength(0);
}
private static final int findKeyword(String s, String[] list) {
s = s.trim().toLowerCase();
for (int i = 0; i < list.length; ++i) {
if (s.equals(list[i]))
return i;
}
return -1;
}
private static final void copyAndFixQuotes(String source, int start, int end,
StringBuilder target) {
// added 'gotLB' logic from ICU4C - questionable [alan]
boolean gotLB = false;
for (int i = start; i < end; ++i) {
char ch = source.charAt(i);
if (ch == '{') {
target.append("'{'");
gotLB = true;
} else if (ch == '}') {
if (gotLB) {
target.append(ch);
gotLB = false;
} else {
target.append("'}'");
}
} else if (ch == '\'') {
target.append("''");
} else {
target.append(ch);
}
}
}
/**
* After reading an object from the input stream, do a simple verification
* to maintain class invariants.
* @throws InvalidObjectException if the objects read from the stream is invalid.
*/
private void readObject(ObjectInputStream in) throws IOException, ClassNotFoundException {
in.defaultReadObject();
if (argumentNames == null) { // name mod, rev
argumentNamesAreNumeric = true;
argumentNames = new String[argumentNumbers.length];
for (int i = 0; i < argumentNumbers.length; ++i) {
argumentNames[i] = String.valueOf(argumentNumbers[i]);
}
}
boolean isValid = maxOffset >= -1
&& formats.length > maxOffset
&& offsets.length > maxOffset
&& argumentNames.length > maxOffset;
if (isValid) {
int lastOffset = pattern.length() + 1;
for (int i = maxOffset; i >= 0; --i) {
if ((offsets[i] < 0) || (offsets[i] > lastOffset)) {
isValid = false;
break;
} else {
lastOffset = offsets[i];
}
}
}
if (!isValid) {
throw new InvalidObjectException(
"Could not reconstruct MessageFormat from corrupt stream.");
}
if (ulocale == null) {
ulocale = ULocale.forLocale(locale);
}
}
/**
* This is a helper method for converting an object array into a map. The
* key set of the map is [0, ..., array.length]. The value associated with
* each key is the ith entry of the passed object array.
*
* @throws InvalidObjectException
* if the objects read from the stream is invalid.
*/
private Map<String, Object> arrayToMap(Object[] array) {
Map<String, Object> map = new HashMap<String, Object>();
if (array != null) {
for (int i = 0; i < array.length; ++i) {
map.put(Integer.toString(i), array[i]);
}
}
return map;
}
private boolean isAlphaIdentifier(String argument) {
if (argument.length() == 0) {
return false;
}
for (int i = 0; i < argument.length(); ++i ) {
if (i == 0 && !UCharacter.isUnicodeIdentifierStart(argument.charAt(i)) ||
i > 0 && !UCharacter.isUnicodeIdentifierPart(argument.charAt(i))){
return false;
}
}
return true;
}
private static final char SINGLE_QUOTE = '\'';
private static final char CURLY_BRACE_LEFT = '{';
private static final char CURLY_BRACE_RIGHT = '}';
private static final int STATE_INITIAL = 0;
private static final int STATE_SINGLE_QUOTE = 1;
private static final int STATE_IN_QUOTE = 2;
private static final int STATE_MSG_ELEMENT = 3;
/**
* {@icu} Converts an 'apostrophe-friendly' pattern into a standard
* pattern. Standard patterns treat all apostrophes as
* quotes, which is problematic in some languages, e.g.
* French, where apostrophe is commonly used. This utility
* assumes that only an unpaired apostrophe immediately before
* a brace is a true quote. Other unpaired apostrophes are paired,
* and the resulting standard pattern string is returned.
*
* <p><b>Note</b> it is not guaranteed that the returned pattern
* is indeed a valid pattern. The only effect is to convert
* between patterns having different quoting semantics.
*
* @param pattern the 'apostrophe-friendly' patttern to convert
* @return the standard equivalent of the original pattern
* @stable ICU 3.4
*/
public static String autoQuoteApostrophe(String pattern) {
StringBuilder buf = new StringBuilder(pattern.length() * 2);
int state = STATE_INITIAL;
int braceCount = 0;
for (int i = 0, j = pattern.length(); i < j; ++i) {
char c = pattern.charAt(i);
switch (state) {
case STATE_INITIAL:
switch (c) {
case SINGLE_QUOTE:
state = STATE_SINGLE_QUOTE;
break;
case CURLY_BRACE_LEFT:
state = STATE_MSG_ELEMENT;
++braceCount;
break;
}
break;
case STATE_SINGLE_QUOTE:
switch (c) {
case SINGLE_QUOTE:
state = STATE_INITIAL;
break;
case CURLY_BRACE_LEFT:
case CURLY_BRACE_RIGHT:
state = STATE_IN_QUOTE;
break;
default:
buf.append(SINGLE_QUOTE);
state = STATE_INITIAL;
break;
}
break;
case STATE_IN_QUOTE:
switch (c) {
case SINGLE_QUOTE:
state = STATE_INITIAL;
break;
}
break;
case STATE_MSG_ELEMENT:
switch (c) {
case CURLY_BRACE_LEFT:
++braceCount;
break;
case CURLY_BRACE_RIGHT:
if (--braceCount == 0) {
state = STATE_INITIAL;
}
break;
}
break;
///CLOVER:OFF
default: // Never happens.
break;
///CLOVER:ON
}
buf.append(c);
}
// End of scan
if (state == STATE_SINGLE_QUOTE || state == STATE_IN_QUOTE) {
buf.append(SINGLE_QUOTE);
}
return new String(buf);
}
//
// private methods for AttributedCharacterIterator support
//
// Note: The equivalent methods are defined as package local methods in
// java.text.Format. ICU cannot access these methods, so we have
// these methods locally, with "_" prefix for avoiding name collision.
// (The collision itself is not a problem, but Eclipse displays warnings
// by the default warning level.) We may move these utility methods
// up to com.ibm.icu.text.UFormat later. Yoshito
private static AttributedCharacterIterator _createAttributedCharacterIterator(String text) {
AttributedString as = new AttributedString(text);
return as.getIterator();
}
private static AttributedCharacterIterator _createAttributedCharacterIterator(
AttributedCharacterIterator[] iterators) {
if (iterators == null || iterators.length == 0) {
return _createAttributedCharacterIterator("");
}
// Create a single AttributedString
StringBuilder sb = new StringBuilder();
for (int i = 0; i < iterators.length; i++) {
int index = iterators[i].getBeginIndex();
int end = iterators[i].getEndIndex();
while (index < end) {
sb.append(iterators[i].setIndex(index++));
}
}
AttributedString as = new AttributedString(sb.toString());
// Set attributes
int offset = 0;
for (int i = 0; i < iterators.length; i++) {
iterators[i].first();
int start = iterators[i].getBeginIndex();
while (true) {
Map<Attribute, Object> map = iterators[i].getAttributes();
int len = iterators[i].getRunLimit() - start; // run length
if (map.size() > 0) {
for (Map.Entry<Attribute, Object> entry : map.entrySet()) {
as.addAttribute(entry.getKey(), entry.getValue(),
offset, offset + len);
}
}
offset += len;
start += len;
iterators[i].setIndex(start);
if (iterators[i].current() == CharacterIterator.DONE) {
break;
}
}
}
return as.getIterator();
}
private static AttributedCharacterIterator _createAttributedCharacterIterator(
AttributedCharacterIterator iterator,
AttributedCharacterIterator.Attribute key, Object value) {
AttributedString as = new AttributedString(iterator);
as.addAttribute(key, value);
return as.getIterator();
}
private static AttributedCharacterIterator _createAttributedCharacterIterator(String text,
AttributedCharacterIterator.Attribute key, Object value) {
AttributedString as = new AttributedString(text);
as.addAttribute(key, value);
return as.getIterator();
}
}