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.ExceptionConst; 021 022/** 023 * Super class for instructions dealing with array access such as IALOAD. 024 * 025 */ 026public abstract class ArrayInstruction extends Instruction implements ExceptionThrower, 027 TypedInstruction { 028 029 /** 030 * Empty constructor needed for Instruction.readInstruction. 031 * Not to be used otherwise. 032 */ 033 ArrayInstruction() { 034 } 035 036 037 /** 038 * @param opcode of instruction 039 */ 040 protected ArrayInstruction(final short opcode) { 041 super(opcode, (short) 1); 042 } 043 044 045 @Override 046 public Class<?>[] getExceptions() { 047 return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_ARRAY_EXCEPTION); 048 } 049 050 051 /** @return type associated with the instruction 052 */ 053 @Override 054 public Type getType( final ConstantPoolGen cp ) { 055 final short _opcode = super.getOpcode(); 056 switch (_opcode) { 057 case org.apache.bcel.Const.IALOAD: 058 case org.apache.bcel.Const.IASTORE: 059 return Type.INT; 060 case org.apache.bcel.Const.CALOAD: 061 case org.apache.bcel.Const.CASTORE: 062 return Type.CHAR; 063 case org.apache.bcel.Const.BALOAD: 064 case org.apache.bcel.Const.BASTORE: 065 return Type.BYTE; 066 case org.apache.bcel.Const.SALOAD: 067 case org.apache.bcel.Const.SASTORE: 068 return Type.SHORT; 069 case org.apache.bcel.Const.LALOAD: 070 case org.apache.bcel.Const.LASTORE: 071 return Type.LONG; 072 case org.apache.bcel.Const.DALOAD: 073 case org.apache.bcel.Const.DASTORE: 074 return Type.DOUBLE; 075 case org.apache.bcel.Const.FALOAD: 076 case org.apache.bcel.Const.FASTORE: 077 return Type.FLOAT; 078 case org.apache.bcel.Const.AALOAD: 079 case org.apache.bcel.Const.AASTORE: 080 return Type.OBJECT; 081 default: 082 throw new ClassGenException("Oops: unknown case in switch" + _opcode); 083 } 084 } 085}