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.generic; 019 020import org.apache.bcel.classfile.ConstantCP; 021import org.apache.bcel.classfile.ConstantNameAndType; 022import org.apache.bcel.classfile.ConstantPool; 023import org.apache.bcel.classfile.ConstantUtf8; 024 025/** 026 * Super class for FieldOrMethod and INVOKEDYNAMIC, since they both have 027 * names and signatures 028 * 029 * @version $Id: FieldOrMethod.java 1481383 2013-05-11 17:34:32Z dbrosius $ 030 * @since 6.0 031 */ 032public abstract class NameSignatureInstruction extends CPInstruction { 033 034 public NameSignatureInstruction() { 035 super(); 036 } 037 038 public NameSignatureInstruction(final short opcode, final int index) { 039 super(opcode, index); 040 } 041 042 public ConstantNameAndType getNameAndType(final ConstantPoolGen cpg) { 043 final ConstantPool cp = cpg.getConstantPool(); 044 final ConstantCP cmr = (ConstantCP) cp.getConstant(super.getIndex()); 045 return (ConstantNameAndType) cp.getConstant(cmr.getNameAndTypeIndex()); 046 } 047 /** @return signature of referenced method/field. 048 */ 049 public String getSignature(final ConstantPoolGen cpg) { 050 final ConstantPool cp = cpg.getConstantPool(); 051 final ConstantNameAndType cnat = getNameAndType(cpg); 052 return ((ConstantUtf8) cp.getConstant(cnat.getSignatureIndex())).getBytes(); 053 } 054 055 /** @return name of referenced method/field. 056 */ 057 public String getName(final ConstantPoolGen cpg) { 058 final ConstantPool cp = cpg.getConstantPool(); 059 final ConstantNameAndType cnat = getNameAndType(cpg); 060 return ((ConstantUtf8) cp.getConstant(cnat.getNameIndex())).getBytes(); 061 } 062 063}