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.Label;
033import io.ebean.enhance.asm.MethodVisitor;
034
035import java.util.Map;
036
037/**
038 * An {@link AbstractInsnNode} that encapsulates a {@link Label}.
039 */
040public class LabelNode extends AbstractInsnNode {
041
042    private Label label;
043
044    public LabelNode() {
045        super(-1);
046    }
047
048    public LabelNode(final Label label) {
049        super(-1);
050        this.label = label;
051    }
052
053    @Override
054    public int getType() {
055        return LABEL;
056    }
057
058    public Label getLabel() {
059        if (label == null) {
060            label = new Label();
061        }
062        return label;
063    }
064
065    @Override
066    public void accept(final MethodVisitor cv) {
067        cv.visitLabel(getLabel());
068    }
069
070    @Override
071    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> labels) {
072        return labels.get(this);
073    }
074
075    public void resetLabel() {
076        label = null;
077    }
078}