001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 *  Unless required by applicable law or agreed to in writing, software
012 *  distributed under the License is distributed on an "AS IS" BASIS,
013 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 *  See the License for the specific language governing permissions and
015 *  limitations under the License.
016 *
017 */
018package org.apache.bcel.generic;
019
020import java.io.IOException;
021
022import org.apache.bcel.util.ByteSequence;
023
024/**
025 * LDC_W - Push item from constant pool (wide index)
026 *
027 * <PRE>
028 * Stack: ... -&gt; ..., item.word1, item.word2
029 * </PRE>
030 *
031 */
032public class LDC_W extends LDC {
033
034    /**
035     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
036     */
037    LDC_W() {
038    }
039
040    public LDC_W(final int index) {
041        super(index);
042    }
043
044    /**
045     * Read needed data (i.e., index) from file.
046     */
047    @Override
048    protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
049        setIndex(bytes.readUnsignedShort());
050        // Override just in case it has been changed
051        super.setOpcode(org.apache.bcel.Const.LDC_W);
052        super.setLength(3);
053    }
054}