6230751: [Fmt-Ch] Recursive MessageFormats in ChoiceFormats ignore indicated subformats
Reviewed-by: naoto
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src/java.base/share/classes/java/text
@ -88,7 +88,6 @@ import java.util.Arrays;
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* <p>
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* Below is an example of constructing a ChoiceFormat with arrays to format
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* and parse values:
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* <blockquote>
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* {@snippet lang=java :
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* double[] limits = {1,2,3,4,5,6,7};
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* String[] dayOfWeekNames = {"Sun","Mon","Tue","Wed","Thur","Fri","Sat"};
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@ -100,34 +99,27 @@ import java.util.Arrays;
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* + form.parse(form.format(i),status));
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* }
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* }
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* </blockquote>
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*
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* <p>
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* For more sophisticated patterns, {@code ChoiceFormat} can be used with
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* {@link MessageFormat} to produce accurate forms for singular and plural:
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* <blockquote>
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* {@snippet lang=java :
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* double[] filelimits = {0,1,2};
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* String[] filepart = {"are no files","is one file","are {2} files"};
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* ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart);
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* Format[] testFormats = {fileform, null, NumberFormat.getInstance()};
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* MessageFormat pattform = new MessageFormat("There {0} on {1}");
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* pattform.setFormats(testFormats);
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* Object[] testArgs = {null, "ADisk", null};
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* for (int i = 0; i < 4; ++i) {
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* testArgs[0] = Integer.valueOf(i);
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* testArgs[2] = testArgs[0];
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* System.out.println(pattform.format(testArgs));
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* MessageFormat msgFmt = new MessageFormat("The disk \"{0}\" contains {1}.");
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* double[] fileLimits = {0,1,2};
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* String[] filePart = {"no files","one file","{1,number} files"};
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* ChoiceFormat fileChoices = new ChoiceFormat(fileLimits, filePart);
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* msgFmt.setFormatByArgumentIndex(1, fileChoices);
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* Object[] args = {"MyDisk", 1273};
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* System.out.println(msgFmt.format(args));
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* }
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* }
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* </blockquote>
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* Would output the following:
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* <blockquote>
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* <pre>{@code
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* There are no files on ADisk
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* There is one file on ADisk
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* There are 2 files on ADisk
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* There are 3 files on ADisk
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* }</pre>
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* </blockquote>
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* The output with different values for {@code fileCount}:
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* <blockquote><pre>
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* The disk "MyDisk" contains no files.
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* The disk "MyDisk" contains one file.
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* The disk "MyDisk" contains 1,273 files.
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* </pre></blockquote>
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* See {@link MessageFormat##pattern_caveats MessageFormat} for caveats regarding
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* {@code MessageFormat} patterns within a {@code ChoiceFormat} pattern.
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*
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* <h2><a id="patterns">Patterns</a></h2>
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* A {@code ChoiceFormat} pattern has the following syntax:
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@ -194,7 +186,6 @@ import java.util.Arrays;
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* {@code new ChoiceFormat("1# ''one'' ").format(1)} returns {@code " 'one' "}.
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*
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* <p>Below is an example of constructing a ChoiceFormat with a pattern:
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* <blockquote>
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* {@snippet lang=java :
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* ChoiceFormat fmt = new ChoiceFormat(
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* "-1#is negative| 0#is zero or fraction | 1#is one |1.0<is 1+ |2#is two |2<is more than 2.");
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@ -210,7 +201,6 @@ import java.util.Arrays;
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* System.out.println(fmt.format(Double.NaN)); // outputs "is negative"
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* System.out.println(fmt.format(Double.POSITIVE_INFINITY)); // outputs "is more than 2."
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* }
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* </blockquote>
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*
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* <h2><a id="synchronization">Synchronization</a></h2>
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*
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@ -231,7 +231,6 @@ import java.util.Objects;
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* <p>
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* The first example uses the static method {@code MessageFormat.format},
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* which internally creates a {@code MessageFormat} for one-time use:
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* <blockquote>
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* {@snippet lang=java :
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* int planet = 7;
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* String event = "a disturbance in the Force";
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@ -240,7 +239,6 @@ import java.util.Objects;
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* "At {1,time} on {1,date}, there was {2} on planet {0,number,integer}.",
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* planet, new Date(), event);
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* }
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* </blockquote>
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* The output is:
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* <blockquote><pre>
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* At 12:30 PM on Jul 3, 2053, there was a disturbance in the Force on planet 7.
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@ -249,7 +247,6 @@ import java.util.Objects;
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* <p>
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* The following example creates a {@code MessageFormat} instance that
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* can be used repeatedly:
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* <blockquote>
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* {@snippet lang=java :
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* int fileCount = 1273;
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* String diskName = "MyDisk";
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@ -260,7 +257,6 @@ import java.util.Objects;
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*
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* System.out.println(form.format(testArgs));
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* }
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* </blockquote>
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* The output with different values for {@code fileCount}:
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* <blockquote><pre>
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* The disk "MyDisk" contains 0 file(s).
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@ -269,23 +265,17 @@ import java.util.Objects;
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* </pre></blockquote>
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*
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* <p>
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* For more sophisticated patterns, you can use a {@code ChoiceFormat}
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* to produce correct forms for singular and plural:
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* <blockquote>
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* For more sophisticated patterns, {@link ChoiceFormat} can be used with
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* {@code MessageFormat} to produce accurate forms for singular and plural:
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* {@snippet lang=java :
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* MessageFormat form = new MessageFormat("The disk \"{1}\" contains {0}.");
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* double[] filelimits = {0,1,2};
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* String[] filepart = {"no files","one file","{0,number} files"};
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* ChoiceFormat fileform = new ChoiceFormat(filelimits, filepart);
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* form.setFormatByArgumentIndex(0, fileform);
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*
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* int fileCount = 1273;
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* String diskName = "MyDisk";
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* Object[] testArgs = {Long.valueOf(fileCount), diskName};
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*
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* System.out.println(form.format(testArgs));
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* MessageFormat msgFmt = new MessageFormat("The disk \"{0}\" contains {1}.");
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* double[] fileLimits = {0,1,2};
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* String[] filePart = {"no files","one file","{1,number} files"};
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* ChoiceFormat fileChoices = new ChoiceFormat(fileLimits, filePart);
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* msgFmt.setFormatByArgumentIndex(1, fileChoices);
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* Object[] args = {"MyDisk", 1273};
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* System.out.println(msgFmt.format(args));
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* }
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* </blockquote>
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* The output with different values for {@code fileCount}:
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* <blockquote><pre>
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* The disk "MyDisk" contains no files.
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@ -297,24 +287,26 @@ import java.util.Objects;
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* You can create the {@code ChoiceFormat} programmatically, as in the
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* above example, or by using a pattern. See {@link ChoiceFormat}
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* for more information.
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* <blockquote>
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* {@snippet lang=java :
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* form.applyPattern(
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* "There {0,choice,0#are no files|1#is one file|1<are {0,number,integer} files}.");
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* msgFmt.applyPattern(
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* "There {0,choice,0#are no files|1#is one file|1<are {1,number,integer} files}.");
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* }
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* </blockquote>
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*
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* <p>
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* <strong>Note:</strong> As we see above, the string produced
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* by a {@code ChoiceFormat} in {@code MessageFormat} is treated as special;
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* occurrences of '{' are used to indicate subformats, and cause recursion.
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* <strong id="pattern_caveats">Notes:</strong> As seen in the previous snippet,
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* the string produced by a {@code ChoiceFormat} in {@code MessageFormat} is
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* treated as special; occurrences of '{' are used to indicate subformats, and
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* cause recursion. If a {@code FormatElement} is defined in the {@code ChoiceFormat}
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* pattern, it will only be formatted according to the {@code FormatType} and
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* {@code FormatStyle} pattern provided. The associated subformats of the
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* top level {@code MessageFormat} will not be applied to the {@code FormatElement}
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* defined in the {@code ChoiceFormat} pattern.
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* If you create both a {@code MessageFormat} and {@code ChoiceFormat}
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* programmatically (instead of using the string patterns), then be careful not to
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* produce a format that recurses on itself, which will cause an infinite loop.
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* <p>
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* When a single argument is parsed more than once in the string, the last match
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* will be the final result of the parsing. For example,
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* <blockquote>
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* {@snippet lang=java :
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* MessageFormat mf = new MessageFormat("{0,number,#.##}, {0,number,#.#}");
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* Object[] objs = {Double.valueOf(3.1415)};
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@ -323,20 +315,17 @@ import java.util.Objects;
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* objs = mf.parse(result, new ParsePosition(0));
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* // objs now equals {Double.valueOf(3.1)}
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* }
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* </blockquote>
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*
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* <p>
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* Likewise, parsing with a {@code MessageFormat} object using patterns containing
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* multiple occurrences of the same argument would return the last match. For
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* example,
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* <blockquote>
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* {@snippet lang=java :
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* MessageFormat mf = new MessageFormat("{0}, {0}, {0}");
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* String forParsing = "x, y, z";
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* Object[] objs = mf.parse(forParsing, new ParsePosition(0));
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* // objs now equals {new String("z")}
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* }
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* </blockquote>
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*
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* <h3><a id="synchronization">Synchronization</a></h3>
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*
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