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 * @version $Id: ArrayInstruction.java 1747278 2016-06-07 17:28:43Z britter $ 026 */ 027public abstract class ArrayInstruction extends Instruction implements ExceptionThrower, 028 TypedInstruction { 029 030 /** 031 * Empty constructor needed for the Class.newInstance() statement in 032 * Instruction.readInstruction(). Not to be used otherwise. 033 */ 034 ArrayInstruction() { 035 } 036 037 038 /** 039 * @param opcode of instruction 040 */ 041 protected ArrayInstruction(final short opcode) { 042 super(opcode, (short) 1); 043 } 044 045 046 @Override 047 public Class<?>[] getExceptions() { 048 return ExceptionConst.createExceptions(ExceptionConst.EXCS.EXCS_ARRAY_EXCEPTION); 049 } 050 051 052 /** @return type associated with the instruction 053 */ 054 @Override 055 public Type getType( final ConstantPoolGen cp ) { 056 final short _opcode = super.getOpcode(); 057 switch (_opcode) { 058 case org.apache.bcel.Const.IALOAD: 059 case org.apache.bcel.Const.IASTORE: 060 return Type.INT; 061 case org.apache.bcel.Const.CALOAD: 062 case org.apache.bcel.Const.CASTORE: 063 return Type.CHAR; 064 case org.apache.bcel.Const.BALOAD: 065 case org.apache.bcel.Const.BASTORE: 066 return Type.BYTE; 067 case org.apache.bcel.Const.SALOAD: 068 case org.apache.bcel.Const.SASTORE: 069 return Type.SHORT; 070 case org.apache.bcel.Const.LALOAD: 071 case org.apache.bcel.Const.LASTORE: 072 return Type.LONG; 073 case org.apache.bcel.Const.DALOAD: 074 case org.apache.bcel.Const.DASTORE: 075 return Type.DOUBLE; 076 case org.apache.bcel.Const.FALOAD: 077 case org.apache.bcel.Const.FASTORE: 078 return Type.FLOAT; 079 case org.apache.bcel.Const.AALOAD: 080 case org.apache.bcel.Const.AASTORE: 081 return Type.OBJECT; 082 default: 083 throw new ClassGenException("Oops: unknown case in switch" + _opcode); 084 } 085 } 086}