/*
 * Copyright 2005-2006 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @(#)$Id: EncoderFactory.java,v 1.3 2005/09/10 19:07:33 kohsuke Exp $
 */
package com.sun.codemodel.internal.util;

import java.lang.reflect.Constructor;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;

/**
 * Creates {@link CharsetEncoder} from a charset name.
 *
 * Fixes a MS1252 handling bug in JDK1.4.2.
 *
 * @author
 *     Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
 */
public class EncoderFactory {
    public static CharsetEncoder createEncoder( String encodin ) {
        Charset cs = Charset.forName(System.getProperty("file.encoding"));
        CharsetEncoder encoder = cs.newEncoder();

        if( cs.getClass().getName().equals("sun.nio.cs.MS1252") ) {
            try {
                // at least JDK1.4.2_01 has a bug in MS1252 encoder.
                // specifically, it returns true for any character.
                // return a correct encoder to workaround this problem

                // statically binding to MS1252Encoder will cause a Link error
                // (at least in IBM JDK1.4.1)
                Class ms1252encoder = Class.forName("com.sun.codemodel.internal.util.MS1252Encoder");
                Constructor c = ms1252encoder.getConstructor(new Class[]{
                    Charset.class
                });
                return (CharsetEncoder)c.newInstance(new Object[]{cs});
            } catch( Throwable t ) {
                // if something funny happens, ignore it and fall back to
                // a broken MS1252 encoder. It's probably still better
                // than choking here.
                return encoder;
            }
        }

        return encoder;
    }
}