| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 1999-2002,2004 The Apache Software Foundation. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package com.sun.org.apache.xml.internal.serialize; |
| |
| |
| import java.io.UnsupportedEncodingException; |
| import java.util.Hashtable; |
| import java.util.Locale; |
| |
| import com.sun.org.apache.xerces.internal.util.EncodingMap; |
| |
| |
| /** |
| * Provides information about encodings. Depends on the Java runtime |
| * to provides writers for the different encodings, but can be used |
| * to override encoding names and provide the last printable character |
| * for each encoding. |
| * |
| * @author <a href="mailto:arkin@intalio.com">Assaf Arkin</a> |
| */ |
| public class Encodings |
| { |
| |
| |
| /** |
| * The last printable character for unknown encodings. |
| */ |
| static final int DEFAULT_LAST_PRINTABLE = 0x7F; |
| |
| // last printable character for Unicode-compatible encodings |
| static final int LAST_PRINTABLE_UNICODE = 0xffff; |
| // unicode-compliant encodings; can express plane 0 |
| static final String[] UNICODE_ENCODINGS = { |
| "Unicode", "UnicodeBig", "UnicodeLittle", "GB2312", "UTF8", "UTF-16", |
| }; |
| // default (Java) encoding if none supplied: |
| static final String DEFAULT_ENCODING = "UTF8"; |
| |
| // note that the size of this Hashtable |
| // is bounded by the number of encodings recognized by EncodingMap; |
| // therefore it poses no static mutability risk. |
| static Hashtable _encodings = new Hashtable(); |
| |
| /** |
| * @param encoding a MIME charset name, or null. |
| */ |
| static EncodingInfo getEncodingInfo(String encoding, boolean allowJavaNames) throws UnsupportedEncodingException { |
| EncodingInfo eInfo = null; |
| if (encoding == null) { |
| if((eInfo = (EncodingInfo)_encodings.get(DEFAULT_ENCODING)) != null) |
| return eInfo; |
| eInfo = new EncodingInfo(EncodingMap.getJava2IANAMapping(DEFAULT_ENCODING), DEFAULT_ENCODING, LAST_PRINTABLE_UNICODE); |
| _encodings.put(DEFAULT_ENCODING, eInfo); |
| return eInfo; |
| } |
| // need to convert it to upper case: |
| encoding = encoding.toUpperCase(Locale.ENGLISH); |
| String jName = EncodingMap.getIANA2JavaMapping(encoding); |
| if(jName == null) { |
| // see if the encoding passed in is a Java encoding name. |
| if(allowJavaNames ) { |
| EncodingInfo.testJavaEncodingName(encoding); |
| if((eInfo = (EncodingInfo)_encodings.get(encoding)) != null) |
| return eInfo; |
| // is it known to be unicode-compliant? |
| int i=0; |
| for(; i<UNICODE_ENCODINGS.length; i++) { |
| if(UNICODE_ENCODINGS[i].equalsIgnoreCase(encoding)) { |
| eInfo = new EncodingInfo(EncodingMap.getJava2IANAMapping(encoding), encoding, LAST_PRINTABLE_UNICODE); |
| break; |
| } |
| } |
| if(i == UNICODE_ENCODINGS.length) { |
| eInfo = new EncodingInfo(EncodingMap.getJava2IANAMapping(encoding), encoding, DEFAULT_LAST_PRINTABLE); |
| } |
| _encodings.put(encoding, eInfo); |
| return eInfo; |
| } else { |
| throw new UnsupportedEncodingException(encoding); |
| } |
| } |
| if ((eInfo = (EncodingInfo)_encodings.get(jName)) != null) |
| return eInfo; |
| // have to create one... |
| // is it known to be unicode-compliant? |
| int i=0; |
| for(; i<UNICODE_ENCODINGS.length; i++) { |
| if(UNICODE_ENCODINGS[i].equalsIgnoreCase(jName)) { |
| eInfo = new EncodingInfo(encoding, jName, LAST_PRINTABLE_UNICODE); |
| break; |
| } |
| } |
| if(i == UNICODE_ENCODINGS.length) { |
| eInfo = new EncodingInfo(encoding, jName, DEFAULT_LAST_PRINTABLE); |
| } |
| _encodings.put(jName, eInfo); |
| return eInfo; |
| } |
| |
| static final String JIS_DANGER_CHARS |
| = "\\\u007e\u007f\u00a2\u00a3\u00a5\u00ac" |
| +"\u2014\u2015\u2016\u2026\u203e\u203e\u2225\u222f\u301c" |
| +"\uff3c\uff5e\uffe0\uffe1\uffe2\uffe3"; |
| |
| } |