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.classfile;
019
020import java.io.DataInput;
021import java.io.IOException;
022
023import org.apache.bcel.Const;
024
025/** 
026 * This class represents a constant pool reference to a field.
027 *
028 * @version $Id: ConstantFieldref.java 1747278 2016-06-07 17:28:43Z britter $
029 */
030public final class ConstantFieldref extends ConstantCP {
031
032    /**
033     * Initialize from another object.
034     */
035    public ConstantFieldref(final ConstantFieldref c) {
036        super(Const.CONSTANT_Fieldref, c.getClassIndex(), c.getNameAndTypeIndex());
037    }
038
039
040    /**
041     * Initialize instance from input data.
042     *
043     * @param input input stream
044     * @throws IOException
045     */
046    ConstantFieldref(final DataInput input) throws IOException {
047        super(Const.CONSTANT_Fieldref, input);
048    }
049
050
051    /**
052     * @param class_index Reference to the class containing the Field
053     * @param name_and_type_index and the Field signature
054     */
055    public ConstantFieldref(final int class_index, final int name_and_type_index) {
056        super(Const.CONSTANT_Fieldref, class_index, name_and_type_index);
057    }
058
059
060    /**
061     * Called by objects that are traversing the nodes of the tree implicitely
062     * defined by the contents of a Java class. I.e., the hierarchy of Fields,
063     * fields, attributes, etc. spawns a tree of objects.
064     *
065     * @param v Visitor object
066     */
067    @Override
068    public void accept( final Visitor v ) {
069        v.visitConstantFieldref(this);
070    }
071}