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 */
017package org.apache.bcel.generic;
018
019import java.io.IOException;
020
021import org.apache.bcel.util.ByteSequence;
022
023/**
024 * LDC_W - Push item from constant pool (wide index)
025 *
026 * <PRE>
027 * Stack: ... -&gt; ..., item.word1, item.word2
028 * </PRE>
029 */
030public class LDC_W extends LDC {
031
032    /**
033     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
034     */
035    LDC_W() {
036    }
037
038    public LDC_W(final int index) {
039        super(index);
040    }
041
042    /**
043     * Read needed data (i.e., index) from file.
044     */
045    @Override
046    protected void initFromFile(final ByteSequence bytes, final boolean wide) throws IOException {
047        setIndex(bytes.readUnsignedShort());
048        // Override just in case it has been changed
049        super.setOpcode(org.apache.bcel.Const.LDC_W);
050        super.setLength(3);
051    }
052}