001/***
002 * ASM: a very small and fast Java bytecode manipulation framework
003 * Copyright (c) 2000-2011 INRIA, France Telecom
004 * All rights reserved.
005 *
006 * Redistribution and use in source and binary forms, with or without
007 * modification, are permitted provided that the following conditions
008 * are met:
009 * 1. Redistributions of source code must retain the above copyright
010 *    notice, this list of conditions and the following disclaimer.
011 * 2. Redistributions in binary form must reproduce the above copyright
012 *    notice, this list of conditions and the following disclaimer in the
013 *    documentation and/or other materials provided with the distribution.
014 * 3. Neither the name of the copyright holders nor the names of its
015 *    contributors may be used to endorse or promote products derived from
016 *    this software without specific prior written permission.
017 *
018 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
028 * THE POSSIBILITY OF SUCH DAMAGE.
029 */
030package io.ebean.enhance.asm.tree;
031
032import io.ebean.enhance.asm.MethodVisitor;
033
034import java.util.Map;
035
036/**
037 * A node that represents a line number declaration. These nodes are pseudo
038 * instruction nodes in order to be inserted in an instruction list.
039 * 
040 * @author Eric Bruneton
041 */
042public class LineNumberNode extends AbstractInsnNode {
043
044    /**
045     * A line number. This number refers to the source file from which the class
046     * was compiled.
047     */
048    public int line;
049
050    /**
051     * The first instruction corresponding to this line number.
052     */
053    public LabelNode start;
054
055    /**
056     * Constructs a new {@link LineNumberNode}.
057     * 
058     * @param line
059     *            a line number. This number refers to the source file from
060     *            which the class was compiled.
061     * @param start
062     *            the first instruction corresponding to this line number.
063     */
064    public LineNumberNode(final int line, final LabelNode start) {
065        super(-1);
066        this.line = line;
067        this.start = start;
068    }
069
070    @Override
071    public int getType() {
072        return LINE;
073    }
074
075    @Override
076    public void accept(final MethodVisitor mv) {
077        mv.visitLineNumber(line, start.getLabel());
078    }
079
080    @Override
081    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> labels) {
082        return new LineNumberNode(line, clone(start, labels));
083    }
084}