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.ConstantPool; 021 022/** 023 * Super class for the GET/PUTxxx family of instructions. 024 * 025 */ 026public abstract class FieldInstruction extends FieldOrMethod { 027 028 /** 029 * Empty constructor needed for Instruction.readInstruction. Not to be used otherwise. 030 */ 031 FieldInstruction() { 032 } 033 034 /** 035 * @param index to constant pool 036 */ 037 protected FieldInstruction(final short opcode, final int index) { 038 super(opcode, index); 039 } 040 041 /** 042 * @return name of referenced field. 043 */ 044 public String getFieldName(final ConstantPoolGen cpg) { 045 return getName(cpg); 046 } 047 048 /** 049 * @return size of field (1 or 2) 050 */ 051 protected int getFieldSize(final ConstantPoolGen cpg) { 052 return Type.size(Type.getTypeSize(getSignature(cpg))); 053 } 054 055 /** 056 * @return type of field 057 */ 058 public Type getFieldType(final ConstantPoolGen cpg) { 059 return Type.getType(getSignature(cpg)); 060 } 061 062 /** 063 * @return return type of referenced field 064 */ 065 @Override 066 public Type getType(final ConstantPoolGen cpg) { 067 return getFieldType(cpg); 068 } 069 070 /** 071 * @return mnemonic for instruction with symbolic references resolved 072 */ 073 @Override 074 public String toString(final ConstantPool cp) { 075 return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " " + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref); 076 } 077}