001 //$HeadURL: svn+ssh://rbezema@svn.wald.intevation.org/deegree/base/branches/2.2_testing/src/org/deegree/framework/util/CharsetUtils.java $
002 /*---------------- FILE HEADER ------------------------------------------
003
004 This file is part of deegree.
005 Copyright (C) 2001-2008 by:
006 EXSE, Department of Geography, University of Bonn
007 http://www.giub.uni-bonn.de/deegree/
008 lat/lon GmbH
009 http://www.lat-lon.de
010
011 This library is free software; you can redistribute it and/or
012 modify it under the terms of the GNU Lesser General Public
013 License as published by the Free Software Foundation; either
014 version 2.1 of the License, or (at your option) any later version.
015
016 This library is distributed in the hope that it will be useful,
017 but WITHOUT ANY WARRANTY; without even the implied warranty of
018 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
019 Lesser General Public License for more details.
020
021 You should have received a copy of the GNU Lesser General Public
022 License along with this library; if not, write to the Free Software
023 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
024
025 Contact:
026
027 Andreas Poth
028 lat/lon GmbH
029 Aennchenstr. 19
030 53115 Bonn
031 Germany
032 E-Mail: poth@lat-lon.de
033
034 Prof. Dr. Klaus Greve
035 Department of Geography
036 University of Bonn
037 Meckenheimer Allee 166
038 53115 Bonn
039 Germany
040 E-Mail: greve@giub.uni-bonn.de
041
042 ---------------------------------------------------------------------------*/
043 package org.deegree.framework.util;
044
045 import java.nio.ByteBuffer;
046 import java.nio.CharBuffer;
047 import java.nio.charset.CharacterCodingException;
048 import java.nio.charset.Charset;
049 import java.nio.charset.CharsetDecoder;
050 import java.nio.charset.CharsetEncoder;
051
052 import org.deegree.framework.log.ILogger;
053 import org.deegree.framework.log.LoggerFactory;
054
055 /**
056 *
057 *
058 * @version $Revision: 9339 $
059 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
060 * @author last edited by: $Author: apoth $
061 *
062 * @version 1.0. $Revision: 9339 $, $Date: 2007-12-27 13:31:52 +0100 (Do, 27 Dez 2007) $
063 *
064 * @since 2.0
065 */
066 public final class CharsetUtils {
067
068 private static ILogger LOG = LoggerFactory.getLogger( CharsetUtils.class );
069
070 private static final String DEFAULT_CHARSET = "UTF-8";
071
072 private CharsetUtils() {
073 }
074
075 /**
076 * returns the name of the charset that is passed to the JVM as system property -DCHARSET=... If
077 * no charset has been defined UTF-8 will be returned as default.
078 *
079 * @return the name of the charset that is passed to the JVM as system property -DCHARSET=... If
080 * no charset has been defined UTF-8 will be returned as default.
081 */
082 public static String getSystemCharset() {
083 String charset = null;
084 try {
085 charset = System.getProperty( "CHARSET" );
086 } catch ( Exception exc ) {
087 LOG.logError( "Error retrieving system property CHARSET", exc );
088 }
089 if ( charset == null ) {
090 charset = DEFAULT_CHARSET;
091 }
092 LOG.logDebug( "Using system charset: " + charset );
093 return charset;
094 }
095
096 public static String convertToUnicode( String input, String inCharset ) {
097 // Create the encoder and decoder for inCharset
098 Charset charset = Charset.forName( inCharset );
099 CharsetEncoder encoder = charset.newEncoder();
100
101 ByteBuffer bbuf = null;
102 try {
103 // Convert a string to ISO-LATIN-1 bytes in a ByteBuffer
104 // The new ByteBuffer is ready to be read.
105 bbuf = encoder.encode( CharBuffer.wrap( input ) );
106
107 } catch ( CharacterCodingException e ) {
108 LOG.logError( e.getMessage(), e );
109 }
110 return bbuf.toString();
111 }
112
113 public static String convertFromUnicode( String input, String targetCharset ) {
114 // Create the encoder and decoder for inCharset
115 Charset charset = Charset.forName( targetCharset );
116 CharsetDecoder decoder = charset.newDecoder();
117
118 CharBuffer cbuf = null;
119 try {
120 // Convert ISO-LATIN-1 bytes in a ByteBuffer to a character ByteBuffer and then to a
121 // string.
122 // The new ByteBuffer is ready to be read.
123 cbuf = decoder.decode( ByteBuffer.wrap( input.getBytes() ) );
124 } catch ( CharacterCodingException e ) {
125 LOG.logError( e.getMessage(), e );
126 }
127 return cbuf.toString();
128 }
129
130 }