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.IOException;
029    
030    /**
031     * See JVMS3, section 4.8.12.
032     *
033     *  <p><b>This is NOT part of any API supported by Sun Microsystems.  If
034     *  you write code that depends on this, you do so at your own risk.
035     *  This code and its internal interfaces are subject to change or
036     *  deletion without notice.</b>
037     */
038    public class LineNumberTable_attribute extends Attribute {
039        LineNumberTable_attribute(ClassReader cr, int name_index, int length) throws IOException {
040            super(name_index, length);
041            line_number_table_length = cr.readUnsignedShort();
042            line_number_table = new Entry[line_number_table_length];
043            for (int i = 0; i < line_number_table_length; i++)
044                line_number_table[i] = new Entry(cr);
045        }
046    
047        public LineNumberTable_attribute(ConstantPool constant_pool, Entry[] line_number_table)
048                throws ConstantPoolException {
049            this(constant_pool.getUTF8Index(Attribute.LineNumberTable), line_number_table);
050        }
051    
052        public LineNumberTable_attribute(int name_index, Entry[] line_number_table) {
053            super(name_index, line_number_table.length * Entry.length());
054            this.line_number_table_length = line_number_table.length;
055            this.line_number_table = line_number_table;
056        }
057    
058        public <R, D> R accept(Visitor<R, D> visitor, D data) {
059            return visitor.visitLineNumberTable(this, data);
060        }
061    
062        public final int line_number_table_length;
063        public final Entry[] line_number_table;
064    
065        public static class Entry {
066            Entry(ClassReader cr) throws IOException {
067                start_pc = cr.readUnsignedShort();
068                line_number = cr.readUnsignedShort();
069            }
070    
071            public static int length() {
072                return 4;
073            }
074    
075            public final int start_pc;
076            public final int line_number;
077        }
078    }