LDC_W.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package org.apache.bcel.generic;

import java.io.IOException;

import org.apache.bcel.util.ByteSequence;

/**
 * LDC_W - Push item from constant pool (wide index)
 *
 * <PRE>
 * Stack: ... -&gt; ..., item.word1, item.word2
 * </PRE>
 */
public class LDC_W extends LDC {

    /**
     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
     */
    LDC_W() {
    }

    public LDC_W(final int index) {
        super(index);
    }

    /**
     * Read needed data (i.e., index) from file.
     */
    @Override
    protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
        setIndex(bytes.readUnsignedShort());
        // Override just in case it has been changed
        super.setOpcode(org.apache.bcel.Const.LDC_W);
        super.setLength(3);
    }
}