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.classfile;
018
019import java.io.DataInput;
020import java.io.IOException;
021
022import org.apache.bcel.Const;
023
024/**
025 * This class represents a constant pool reference to a field.
026 */
027public final class ConstantFieldref extends ConstantCP {
028
029    /**
030     * Initialize from another object.
031     *
032     * @param c Source to copy.
033     */
034    public ConstantFieldref(final ConstantFieldref c) {
035        super(Const.CONSTANT_Fieldref, c.getClassIndex(), c.getNameAndTypeIndex());
036    }
037
038    /**
039     * Initialize instance from input data.
040     *
041     * @param input input stream
042     * @throws IOException if an I/O error occurs.
043     */
044    ConstantFieldref(final DataInput input) throws IOException {
045        super(Const.CONSTANT_Fieldref, input);
046    }
047
048    /**
049     * @param classIndex Reference to the class containing the Field
050     * @param nameAndTypeIndex and the Field signature
051     */
052    public ConstantFieldref(final int classIndex, final int nameAndTypeIndex) {
053        super(Const.CONSTANT_Fieldref, classIndex, nameAndTypeIndex);
054    }
055
056    /**
057     * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
058     * I.e., the hierarchy of Fields, fields, attributes, etc. spawns a tree of objects.
059     *
060     * @param v Visitor object
061     */
062    @Override
063    public void accept(final Visitor v) {
064        v.visitConstantFieldref(this);
065    }
066}