    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
    019/**
    020 * LCONST - Push 0 or 1, other values cause an exception
    021 *
    022 * <PRE>
    023 * Stack: ... -&gt; ...,
    024 * </PRE>
    025 */
    026public class LCONST extends Instruction implements ConstantPushInstruction {
    027
    028    private long value;
    029
    030    /**
    031     * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise.
    032     */
    033    LCONST() {
    034    }
    035
    036    public LCONST(final long l) {
    037        super(org.apache.bcel.Const.LCONST_0, (short) 1);
    038        if (l == 0) {
    039            super.setOpcode(org.apache.bcel.Const.LCONST_0);
    040        } else if (l == 1) {
    041            super.setOpcode(org.apache.bcel.Const.LCONST_1);
    042        } else {
    043            throw new ClassGenException("LCONST can be used only for 0 and 1: " + l);
    044        }
    045        value = l;
    046    }
    047
    048    /**
    049     * Call corresponding visitor method(s). The order is: Call visitor methods of implemented interfaces first, then call
    050     * methods according to the class hierarchy in descending order, i.e., the most specific visitXXX() call comes last.
    051     *
    052     * @param v Visitor object
    053     */
    054    @Override
    055    public void accept(final Visitor v) {
    056        v.visitPushInstruction(this);
    057        v.visitStackProducer(this);
    058        v.visitTypedInstruction(this);
    059        v.visitConstantPushInstruction(this);
    060        v.visitLCONST(this);
    061    }
    062
    063    /**
    064     * @return Type.LONG
    065     */
    066    @Override
    067    public Type getType(final ConstantPoolGen cp) {
    068        return Type.LONG;
    069    }
    070
    071    @Override
    072    public Number getValue() {
    073        return Long.valueOf(value);
    074    }
    075}