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ICU-8006 Add new API for CharsetDecoderICU and CharsetEncoderICU

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X-SVN-Rev: 29474
This commit is contained in:
Michael Ow 2011-02-24 20:58:37 +00:00
parent f0fe89f14c
commit d0670255e8
4 changed files with 84 additions and 4 deletions
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21
icu4j/main/classes/charset/src/com/ibm/icu/charset/CharsetDecoderICU.java
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@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2006-2010, International Business Machines Corporation and *
* Copyright (C) 2006-2011, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
@ -722,4 +722,23 @@ public abstract class CharsetDecoderICU extends CharsetDecoder{
}
}*/
/**
* Returns the maxBytesPerChar value for the Charset that created this decoder.
* @return maxBytesPerChar
* @draft ICU 4.8
*/
public final float maxBytesPerChar() {
return ((CharsetICU)(this.charset())).maxBytesPerChar;
}
/**
* Returns whether or not the converter has a fixed ratio of bytes per
* 16-bit char/UChar (e.g. converters that are SBCS or DBCS).
* @return true if the converter is fixed-width
* @draft ICU 4.8
*/
public final boolean isFixedWidth() {
return ((CharsetICU)this.charset()).isFixedWidth();
}
}

21
icu4j/main/classes/charset/src/com/ibm/icu/charset/CharsetEncoderICU.java
View file

@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2006-2009, International Business Machines Corporation and *
* Copyright (C) 2006-2011, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
@ -917,4 +917,23 @@ public abstract class CharsetEncoderICU extends CharsetEncoder {
fromUChar32 = UCharacter.getCodePoint(lead, trail);
return null;
}
/**
* Returns the maxCharsPerByte value for the Charset that created this encoder.
* @return maxCharsPerByte
* @draft ICU 4.8
*/
public final float maxCharsPerByte() {
return ((CharsetICU)(this.charset())).maxCharsPerByte;
}
/**
* Returns whether or not the converter has a fixed ratio of bytes per
* 16-bit char/UChar (e.g. converters that are SBCS or DBCS).
* @return true if the converter is fixed-width
* @draft ICU 4.8
*/
public final boolean isFixedWidth() {
return ((CharsetICU)this.charset()).isFixedWidth();
}
}

6
icu4j/main/classes/charset/src/com/ibm/icu/charset/CharsetICU.java
View file

@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2006-2010, International Business Machines Corporation and *
* Copyright (C) 2006-2011, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
@ -378,5 +378,9 @@ public abstract class CharsetICU extends Charset{
static void getCompleteUnicodeSet(UnicodeSet setFillIn){
setFillIn.add(0, 0x10ffff);
}
boolean isFixedWidth() {
return (maxBytesPerChar == minBytesPerChar);
}
}

40
icu4j/main/tests/charset/src/com/ibm/icu/dev/test/charset/TestCharset.java
View file

@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2006-2010, International Business Machines Corporation and *
* Copyright (C) 2006-2011, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*
@ -5592,4 +5592,42 @@ public class TestCharset extends TestFmwk {
}
}
}
public void TestIsFixedWidth(){
String[] fixedWidth = {
"US-ASCII",
"UTF32",
"ibm-5478_P100-1995",
"UTF16"
};
String[] notFixedWidth = {
"GB18030",
"UTF8",
"windows-949-2000"
};
CharsetProvider provider = new CharsetProviderICU();
Charset charset;
CharsetEncoder encoder;
CharsetDecoder decoder;
for (int i = 0; i < fixedWidth.length; i++) {
charset = provider.charsetForName(fixedWidth[i]);
encoder = charset.newEncoder();
decoder = charset.newDecoder();
if (!((CharsetEncoderICU)encoder).isFixedWidth() || !((CharsetDecoderICU)decoder).isFixedWidth()) {
errln(fixedWidth[i] + " is a fixedWidth charset but returned false.");
}
}
for (int i = 0; i < notFixedWidth.length; i++) {
charset = provider.charsetForName(notFixedWidth[i]);
encoder = charset.newEncoder();
decoder = charset.newDecoder();
if (((CharsetEncoderICU)encoder).isFixedWidth() || ((CharsetDecoderICU)decoder).isFixedWidth()) {
errln(notFixedWidth[i] + " is NOT a fixedWidth charset but returned true.");
}
}
}
}