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 * @version $Id: FieldInstruction.java 1747278 2016-06-07 17:28:43Z britter $ 026 */ 027public abstract class FieldInstruction extends FieldOrMethod { 028 029 /** 030 * Empty constructor needed for the Class.newInstance() statement in 031 * Instruction.readInstruction(). Not to be used otherwise. 032 */ 033 FieldInstruction() { 034 } 035 036 037 /** 038 * @param index to constant pool 039 */ 040 protected FieldInstruction(final short opcode, final int index) { 041 super(opcode, index); 042 } 043 044 045 /** 046 * @return mnemonic for instruction with symbolic references resolved 047 */ 048 @Override 049 public String toString( final ConstantPool cp ) { 050 return org.apache.bcel.Const.getOpcodeName(super.getOpcode()) + " " 051 + cp.constantToString(super.getIndex(), org.apache.bcel.Const.CONSTANT_Fieldref); 052 } 053 054 055 /** @return size of field (1 or 2) 056 */ 057 protected int getFieldSize( final ConstantPoolGen cpg ) { 058 return Type.size(Type.getTypeSize(getSignature(cpg))); 059 } 060 061 062 /** @return return type of referenced field 063 */ 064 @Override 065 public Type getType( final ConstantPoolGen cpg ) { 066 return getFieldType(cpg); 067 } 068 069 070 /** @return type of field 071 */ 072 public Type getFieldType( final ConstantPoolGen cpg ) { 073 return Type.getType(getSignature(cpg)); 074 } 075 076 077 /** @return name of referenced field. 078 */ 079 public String getFieldName( final ConstantPoolGen cpg ) { 080 return getName(cpg); 081 } 082}