001 //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.3_testing/src/org/deegree/framework/util/CharsetUtils.java $
002 /*----------------------------------------------------------------------------
003 This file is part of deegree, http://deegree.org/
004 Copyright (C) 2001-2009 by:
005 Department of Geography, University of Bonn
006 and
007 lat/lon GmbH
008
009 This library is free software; you can redistribute it and/or modify it under
010 the terms of the GNU Lesser General Public License as published by the Free
011 Software Foundation; either version 2.1 of the License, or (at your option)
012 any later version.
013 This library is distributed in the hope that it will be useful, but WITHOUT
014 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
015 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
016 details.
017 You should have received a copy of the GNU Lesser General Public License
018 along with this library; if not, write to the Free Software Foundation, Inc.,
019 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
020
021 Contact information:
022
023 lat/lon GmbH
024 Aennchenstr. 19, 53177 Bonn
025 Germany
026 http://lat-lon.de/
027
028 Department of Geography, University of Bonn
029 Prof. Dr. Klaus Greve
030 Postfach 1147, 53001 Bonn
031 Germany
032 http://www.geographie.uni-bonn.de/deegree/
033
034 e-mail: info@deegree.org
035 ----------------------------------------------------------------------------*/
036 package org.deegree.framework.util;
037
038 import java.nio.ByteBuffer;
039 import java.nio.CharBuffer;
040 import java.nio.charset.CharacterCodingException;
041 import java.nio.charset.Charset;
042 import java.nio.charset.CharsetDecoder;
043 import java.nio.charset.CharsetEncoder;
044
045 import org.deegree.framework.log.ILogger;
046 import org.deegree.framework.log.LoggerFactory;
047
048 /**
049 *
050 *
051 * @version $Revision: 18195 $
052 * @author <a href="mailto:poth@lat-lon.de">Andreas Poth</a>
053 * @author last edited by: $Author: mschneider $
054 *
055 * @version 1.0. $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
056 *
057 * @since 2.0
058 */
059 public final class CharsetUtils {
060
061 private static ILogger LOG = LoggerFactory.getLogger( CharsetUtils.class );
062
063 private static final String DEFAULT_CHARSET = "UTF-8";
064
065 private CharsetUtils() {
066 //nottin
067 }
068
069 /**
070 * returns the name of the charset that is passed to the JVM as system property -DCHARSET=... If
071 * no charset has been defined UTF-8 will be returned as default.
072 *
073 * @return the name of the charset that is passed to the JVM as system property -DCHARSET=... If
074 * no charset has been defined UTF-8 will be returned as default.
075 */
076 public static String getSystemCharset() {
077 String charset = null;
078 try {
079 charset = System.getProperty( "CHARSET" );
080 } catch ( Exception exc ) {
081 LOG.logError( "Error retrieving system property CHARSET", exc );
082 }
083 if ( charset == null ) {
084 charset = DEFAULT_CHARSET;
085 }
086 LOG.logDebug( "Using system charset: " + charset );
087 return charset;
088 }
089
090 /**
091 * A method to convert an input string from a given charset to UTF-8 by using {@link java.nio.charset.CharsetEncoder}
092 * @param input
093 * @param inCharset
094 * @return the charset encoded String
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 /**
114 * A method to convert an input string in UTF-8 to a given charset by using {@link java.nio.charset.CharsetDecoder}
115 * @param input
116 * @param targetCharset
117 * @return the decoded string
118 */
119 public static String convertFromUnicode( String input, String targetCharset ) {
120 // Create the encoder and decoder for inCharset
121 Charset charset = Charset.forName( targetCharset );
122 CharsetDecoder decoder = charset.newDecoder();
123
124 CharBuffer cbuf = null;
125 try {
126 // Convert ISO-LATIN-1 bytes in a ByteBuffer to a character ByteBuffer and then to a
127 // string.
128 // The new ByteBuffer is ready to be read.
129 cbuf = decoder.decode( ByteBuffer.wrap( input.getBytes() ) );
130 } catch ( CharacterCodingException e ) {
131 LOG.logError( e.getMessage(), e );
132 }
133 return cbuf.toString();
134 }
135
136 }