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 */
019
020package org.apache.bcel.generic;
021
022import org.apache.bcel.classfile.ConstantCP;
023import org.apache.bcel.classfile.ConstantNameAndType;
024import org.apache.bcel.classfile.ConstantPool;
025import org.apache.bcel.classfile.ConstantUtf8;
026
027/**
028 * Super class for FieldOrMethod and INVOKEDYNAMIC, since they both have names and signatures
029 *
030 * @since 6.0
031 */
032public abstract class NameSignatureInstruction extends CPInstruction {
033
034    public NameSignatureInstruction() {
035    }
036
037    public NameSignatureInstruction(final short opcode, final int index) {
038        super(opcode, index);
039    }
040
041    /**
042     * @return name of referenced method/field.
043     */
044    public String getName(final ConstantPoolGen cpg) {
045        final ConstantPool cp = cpg.getConstantPool();
046        final ConstantNameAndType cnat = getNameAndType(cpg);
047        return ((ConstantUtf8) cp.getConstant(cnat.getNameIndex())).getBytes();
048    }
049
050    public ConstantNameAndType getNameAndType(final ConstantPoolGen cpg) {
051        final ConstantPool cp = cpg.getConstantPool();
052        final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex());
053        return (ConstantNameAndType) cp.getConstant(cmr.getNameAndTypeIndex());
054    }
055
056    /**
057     * @return signature of referenced method/field.
058     */
059    public String getSignature(final ConstantPoolGen cpg) {
060        final ConstantPool cp = cpg.getConstantPool();
061        final ConstantNameAndType cnat = getNameAndType(cpg);
062        return ((ConstantUtf8) cp.getConstant(cnat.getSignatureIndex())).getBytes();
063    }
064
065}