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1: /* IconvProvider.java -- 2: Copyright (C) 2005 Free Software Foundation, Inc. 3: 4: This file is part of GNU Classpath. 5: 6: GNU Classpath is free software; you can redistribute it and/or modify 7: it under the terms of the GNU General Public License as published by 8: the Free Software Foundation; either version 2, or (at your option) 9: any later version. 10: 11: GNU Classpath is distributed in the hope that it will be useful, but 12: WITHOUT ANY WARRANTY; without even the implied warranty of 13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14: General Public License for more details. 15: 16: You should have received a copy of the GNU General Public License 17: along with GNU Classpath; see the file COPYING. If not, write to the 18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19: 02110-1301 USA. 20: 21: Linking this library statically or dynamically with other modules is 22: making a combined work based on this library. Thus, the terms and 23: conditions of the GNU General Public License cover the whole 24: combination. 25: 26: As a special exception, the copyright holders of this library give you 27: permission to link this library with independent modules to produce an 28: executable, regardless of the license terms of these independent 29: modules, and to copy and distribute the resulting executable under 30: terms of your choice, provided that you also meet, for each linked 31: independent module, the terms and conditions of the license of that 32: module. An independent module is a module which is not derived from 33: or based on this library. If you modify this library, you may extend 34: this exception to your version of the library, but you are not 35: obligated to do so. If you do not wish to do so, delete this 36: exception statement from your version. */ 37: 38: 39: package gnu.java.nio.charset.iconv; 40: 41: import java.nio.charset.Charset; 42: import java.nio.charset.spi.CharsetProvider; 43: import java.util.Collections; 44: import java.util.HashMap; 45: import java.util.Iterator; 46: import java.util.Vector; 47: 48: /** 49: * Charset provider wrapping iconv. 50: * 51: * @author Sven de Marothy 52: */ 53: public final class IconvProvider extends CharsetProvider 54: { 55: private static IconvProvider singleton; 56: 57: static 58: { 59: synchronized (IconvProvider.class) 60: { 61: singleton = null; 62: } 63: } 64: 65: // Declaring the construtor public may violate the use of singleton. 66: // But it must be public so that an instance of this class can be 67: // created by Class.newInstance(), which is the case when this provider is 68: // defined in META-INF/services/java.nio.charset.spi.CharsetProvider. 69: public IconvProvider() 70: { 71: IconvMetaData.setup(); 72: } 73: 74: public Iterator charsets() 75: { 76: Vector names = IconvMetaData.charsets(); 77: Vector charsets = new Vector(); 78: for (int i = 0; i < names.size(); i++) 79: { 80: try 81: { 82: charsets.add(new IconvCharset((IconvMetaData) names.elementAt(i))); 83: } 84: catch (IllegalArgumentException e) 85: { 86: } 87: } 88: return charsets.iterator(); 89: } 90: 91: public Charset charsetForName(String charsetName) 92: { 93: try 94: { 95: IconvMetaData info = IconvMetaData.get(charsetName); 96: 97: // Try anyway if the set isn't found. 98: if (info == null) 99: info = new IconvMetaData(charsetName, 2.0f, 2.0f, 2.0f, 2.0f, 100: new String[] { }, charsetName); 101: return new IconvCharset(info); 102: } 103: catch (IllegalArgumentException e) 104: { 105: return null; 106: } 107: } 108: 109: public static synchronized IconvProvider provider() 110: { 111: if (singleton == null) 112: singleton = new IconvProvider(); 113: return singleton; 114: } 115: }