/*
* @(#)OSFCodeSetRegistry.java 1.9 03/12/19
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package com.sun.corba.se.impl.encoding;
/**
*
* Information from the OSF code set registry version 1.2g.
*
* Use the Entry corresponding to the desired code set.
*
* Consider rename to CodeSetRegistry since OSF is dead.
*/
public final class OSFCodeSetRegistry
{
// Numbers from the OSF code set registry version 1.2g.
//
// Please see the individual Entry definitions for
// more details.
public static final int ISO_8859_1_VALUE = 0x00010001;
public static final int UTF_16_VALUE = 0x00010109;
public static final int UTF_8_VALUE = 0x05010001;
public static final int UCS_2_VALUE = 0x00010100;
public static final int ISO_646_VALUE = 0x00010020;
private OSFCodeSetRegistry() {}
/**
* An entry in the OSF registry which allows users
* to find out the equivalent Java character encoding
* name as well as some other facts from the registry.
*/
public final static class Entry
{
private String javaName;
private int encodingNum;
private boolean isFixedWidth;
private int maxBytesPerChar;
private Entry(String javaName,
int encodingNum,
boolean isFixedWidth,
int maxBytesPerChar) {
this.javaName = javaName;
this.encodingNum = encodingNum;
this.isFixedWidth = isFixedWidth;
this.maxBytesPerChar = maxBytesPerChar;
}
/**
* Returns the Java equivalent name. If the encoding has
* an optional byte order marker, this name will map to the
* Java encoding that includes the marker.
*/
public String getName() {
return javaName;
}
/**
* Get the OSF registry number for this code set.
*/
public int getNumber() {
return encodingNum;
}
/**
* Is this a fixed or variable width code set? (In CORBA
* terms, "non-byte-oriented" or a "byte-oriented"
* code set, respectively)
*/
public boolean isFixedWidth() {
return isFixedWidth;
}
public int getMaxBytesPerChar() {
return maxBytesPerChar;
}
/**
* First checks reference equality since it's expected
* people will use the pre-defined constant Entries.
*/
public boolean equals(Object obj) {
if (this == obj)
return true;
if (!(obj instanceof OSFCodeSetRegistry.Entry))
return false;
OSFCodeSetRegistry.Entry other
= (OSFCodeSetRegistry.Entry)obj;
return (javaName.equals(other.javaName) &&
encodingNum == other.encodingNum &&
isFixedWidth == other.isFixedWidth &&
maxBytesPerChar == other.maxBytesPerChar);
}
/**
* Uses the registry number as the hash code.
*/
public int hashCode() {
return encodingNum;
}
}
/**
* 8-bit encoding required for GIOP 1.0, and used as the char set
* when nothing else is specified.
*/
public static final Entry ISO_8859_1
= new Entry("ISO-8859-1",
ISO_8859_1_VALUE,
true,
1);
/**
* UTF-16 as specified in the OSF registry has an optional
* byte order marker. UTF-16BE and UTF-16LE are not in the OSF
* registry since it is no longer being developed. When the OMG
* switches to the IANA registry, these can be public. Right
* now, they're used internally by CodeSetConversion.
*/
static final Entry UTF_16BE
= new Entry("UTF-16BE",
-1,
true,
2);
static final Entry UTF_16LE
= new Entry("UTF-16LE",
-2,
true,
2);
/**
* Fallback wchar code set.
*
* In the resolution of issue 3405b, UTF-16 defaults to big endian, so
* doesn't have to have a byte order marker. Unfortunately, this has to be
* a special case for compatibility.
*/
public static final Entry UTF_16
= new Entry("UTF-16",
UTF_16_VALUE,
true,
4);
/**
* Fallback char code set. Also the code set for char data
* in encapsulations. However, since CORBA says chars are
* only one octet, it is really the same as Latin-1.
*/
public static final Entry UTF_8
= new Entry("UTF-8",
UTF_8_VALUE,
false,
6);
/*
* At least in JDK 1.3, UCS-2 isn't one of the mandatory Java character
* encodings. However, our old ORBs require what they call UCS2, even
* though they didn't necessarily do the correct encoding of it.
*
* This is a special case for our legacy ORBs, and put as the last thing
* in our conversion list for wchar data.
*
* If a foreign ORB actually tries to speak UCS2 with us, it probably
* won't work! Beware!
*/
public static final Entry UCS_2
= new Entry("UCS-2",
UCS_2_VALUE,
true,
2);
/**
* This is the encoding older JavaSoft ORBs advertised as their
* CORBA char code set. Actually, they took the lower byte of
* the Java char. This is a 7-bit encoding, so they
* were really sending ISO8859-1.
*/
public static final Entry ISO_646
= new Entry("US-ASCII",
ISO_646_VALUE,
true,
1);
/**
* Given an OSF registry value, return the corresponding Entry.
* Returns null if an Entry for that value is unavailable.
*/
public static Entry lookupEntry(int encodingValue) {
switch(encodingValue) {
case ISO_8859_1_VALUE:
return OSFCodeSetRegistry.ISO_8859_1;
case UTF_16_VALUE:
return OSFCodeSetRegistry.UTF_16;
case UTF_8_VALUE:
return OSFCodeSetRegistry.UTF_8;
case ISO_646_VALUE:
return OSFCodeSetRegistry.ISO_646;
case UCS_2_VALUE:
return OSFCodeSetRegistry.UCS_2;
default:
return null;
}
}
}
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