src/java.base/share/classes/jdk/internal/org/objectweb/asm/tree/LookupSwitchInsnNode.java

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/*
 * This file is available under and governed by the GNU General Public
 * License version 2 only, as published by the Free Software Foundation.
 * However, the following notice accompanied the original version of this
 * file:
 *
 * ASM: a very small and fast Java bytecode manipulation framework
 * Copyright (c) 2000-2011 INRIA, France Telecom
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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package jdk.internal.org.objectweb.asm.tree;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

import jdk.internal.org.objectweb.asm.Label;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;

/**
 * A node that represents a LOOKUPSWITCH instruction.
 *
 * @author Eric Bruneton
 */
public class LookupSwitchInsnNode extends AbstractInsnNode {

    /**
     * Beginning of the default handler block.
     */
    public LabelNode dflt;

    /**
     * The values of the keys. This list is a list of {@link Integer} objects.
     */
    public List<Integer> keys;

    /**
     * Beginnings of the handler blocks. This list is a list of
     * {@link LabelNode} objects.
     */
    public List<LabelNode> labels;

    /**
     * Constructs a new {@link LookupSwitchInsnNode}.
     *
     * @param dflt
     *            beginning of the default handler block.
     * @param keys
     *            the values of the keys.
     * @param labels
     *            beginnings of the handler blocks. <tt>labels[i]</tt> is the
     *            beginning of the handler block for the <tt>keys[i]</tt> key.
     */
    public LookupSwitchInsnNode(final LabelNode dflt, final int[] keys,
            final LabelNode[] labels) {
        super(Opcodes.LOOKUPSWITCH);
        this.dflt = dflt;
        this.keys = new ArrayList<Integer>(keys == null ? 0 : keys.length);
        this.labels = new ArrayList<LabelNode>(labels == null ? 0
                : labels.length);
        if (keys != null) {
            for (int i = 0; i < keys.length; ++i) {
                this.keys.add(keys[i]);
            }
        }
        if (labels != null) {
            this.labels.addAll(Arrays.asList(labels));
        }
    }

    @Override
    public int getType() {
        return LOOKUPSWITCH_INSN;
    }

    @Override
    public void accept(final MethodVisitor mv) {
        int[] keys = new int[this.keys.size()];
        for (int i = 0; i < keys.length; ++i) {
            keys[i] = this.keys.get(i).intValue();
        }
        Label[] labels = new Label[this.labels.size()];
        for (int i = 0; i < labels.length; ++i) {
            labels[i] = this.labels.get(i).getLabel();
        }
        mv.visitLookupSwitchInsn(dflt.getLabel(), keys, labels);
        acceptAnnotations(mv);
    }

    @Override
    public AbstractInsnNode clone(final Map<LabelNode, LabelNode> labels) {
        LookupSwitchInsnNode clone = new LookupSwitchInsnNode(clone(dflt,
                labels), null, clone(this.labels, labels));
        clone.keys.addAll(keys);
        return clone.cloneAnnotations(this);
    }
}