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