    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one
    003 * or more contributor license agreements.  See the NOTICE file
    004 * distributed with this work for additional information
    005 * regarding copyright ownership.  The ASF licenses this file
    006 * to you under the Apache License, Version 2.0 (the
    007 * "License"); you may not use this file except in compliance
    008 * with the License.  You may obtain a copy of the License at
    009 *
    010 *   https://www.apache.org/licenses/LICENSE-2.0
    011 *
    012 * Unless required by applicable law or agreed to in writing,
    013 * software distributed under the License is distributed on an
    014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    015 * KIND, either express or implied.  See the License for the
    016 * specific language governing permissions and limitations
    017 * under the License.
    018 */
    019package org.apache.bcel.classfile;
    020
    021import java.io.DataInput;
    022import java.io.DataOutputStream;
    023import java.io.IOException;
    024
    025import org.apache.bcel.Const;
    026
    027/**
    028 * This class is derived from the abstract {@link Constant} and represents a reference to a long object.
    029 *
    030 * @see Constant
    031 */
    032public final class ConstantLong extends Constant implements ConstantObject {
    033
    034    private long bytes;
    035
    036    /**
    037     * Initialize from another object.
    038     *
    039     * @param c Source to copy.
    040     */
    041    public ConstantLong(final ConstantLong c) {
    042        this(c.getBytes());
    043    }
    044
    045    /**
    046     * Initialize instance from file data.
    047     *
    048     * @param file Input stream
    049     * @throws IOException if an I/O error occurs.
    050     */
    051    ConstantLong(final DataInput file) throws IOException {
    052        this(file.readLong());
    053    }
    054
    055    /**
    056     * @param bytes Data
    057     */
    058    public ConstantLong(final long bytes) {
    059        super(Const.CONSTANT_Long);
    060        this.bytes = bytes;
    061    }
    062
    063    /**
    064     * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
    065     * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
    066     *
    067     * @param v Visitor object
    068     */
    069    @Override
    070    public void accept(final Visitor v) {
    071        v.visitConstantLong(this);
    072    }
    073
    074    /**
    075     * Dump constant long to file stream in binary format.
    076     *
    077     * @param file Output file stream
    078     * @throws IOException if an I/O error occurs.
    079     */
    080    @Override
    081    public void dump(final DataOutputStream file) throws IOException {
    082        file.writeByte(super.getTag());
    083        file.writeLong(bytes);
    084    }
    085
    086    /**
    087     * @return data, i.e., 8 bytes.
    088     */
    089    public long getBytes() {
    090        return bytes;
    091    }
    092
    093    /**
    094     * @return Long object
    095     */
    096    @Override
    097    public Object getConstantValue(final ConstantPool cp) {
    098        return Long.valueOf(bytes);
    099    }
    100
    101    /**
    102     * @param bytes the raw bytes that represent this long
    103     */
    104    public void setBytes(final long bytes) {
    105        this.bytes = bytes;
    106    }
    107
    108    /**
    109     * @return String representation.
    110     */
    111    @Override
    112    public String toString() {
    113        return super.toString() + "(bytes = " + bytes + ")";
    114    }
    115}