001    /*
002     * Copyright 2007-2008 Sun Microsystems, Inc.  All Rights Reserved.
003     * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
004     *
005     * This code is free software; you can redistribute it and/or modify it
006     * under the terms of the GNU General Public License version 2 only, as
007     * published by the Free Software Foundation.  Sun designates this
008     * particular file as subject to the "Classpath" exception as provided
009     * by Sun in the LICENSE file that accompanied this code.
010     *
011     * This code is distributed in the hope that it will be useful, but WITHOUT
012     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
013     * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
014     * version 2 for more details (a copy is included in the LICENSE file that
015     * accompanied this code).
016     *
017     * You should have received a copy of the GNU General Public License version
018     * 2 along with this work; if not, write to the Free Software Foundation,
019     * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
020     *
021     * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
022     * CA 95054 USA or visit www.sun.com if you need additional information or
023     * have any questions.
024     */
025    
026    package com.sun.tools.classfile;
027    
028    import java.io.ByteArrayInputStream;
029    import java.io.DataInputStream;
030    import java.io.IOException;
031    
032    /**
033     * See JVMS3, section 4.8.15.
034     *
035     *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
036     *  you write code that depends on this, you do so at your own risk.
037     *  This code and its internal interfaces are subject to change or
038     *  deletion without notice.</b>
039     */
040    public class SourceDebugExtension_attribute extends Attribute {
041        SourceDebugExtension_attribute(ClassReader cr, int name_index, int length) throws IOException {
042            super(name_index, length);
043            debug_extension = new byte[attribute_length];
044            cr.readFully(debug_extension);
045        }
046    
047        public SourceDebugExtension_attribute(ConstantPool constant_pool, byte[] debug_extension)
048                throws ConstantPoolException {
049            this(constant_pool.getUTF8Index(Attribute.SourceDebugExtension), debug_extension);
050        }
051    
052        public SourceDebugExtension_attribute(int name_index, byte[] debug_extension) {
053            super(name_index, debug_extension.length);
054            this.debug_extension = debug_extension;
055        }
056    
057        public String getValue() {
058            DataInputStream d  = new DataInputStream(new ByteArrayInputStream(debug_extension));
059            try {
060                return d.readUTF();
061            } catch (IOException e) {
062                return null;
063            }
064        }
065    
066        public <R, D> R accept(Visitor<R, D> visitor, D data) {
067            return visitor.visitSourceDebugExtension(this, data);
068        }
069    
070        public final byte[] debug_extension;
071    }