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.Const; 021 022/** 023 * Super class for the x2y family of instructions. 024 * 025 * @version $Id: ConversionInstruction.java 1747278 2016-06-07 17:28:43Z britter $ 026 */ 027public abstract class ConversionInstruction extends Instruction implements TypedInstruction, 028 StackProducer, StackConsumer { 029 030 /** 031 * Empty constructor needed for the Class.newInstance() statement in 032 * Instruction.readInstruction(). Not to be used otherwise. 033 */ 034 ConversionInstruction() { 035 } 036 037 038 /** 039 * @param opcode opcode of instruction 040 */ 041 protected ConversionInstruction(final short opcode) { 042 super(opcode, (short) 1); 043 } 044 045 046 /** @return type associated with the instruction 047 */ 048 @Override 049 public Type getType( final ConstantPoolGen cp ) { 050 final short _opcode = super.getOpcode(); 051 switch (_opcode) { 052 case Const.D2I: 053 case Const.F2I: 054 case Const.L2I: 055 return Type.INT; 056 case Const.D2F: 057 case Const.I2F: 058 case Const.L2F: 059 return Type.FLOAT; 060 case Const.D2L: 061 case Const.F2L: 062 case Const.I2L: 063 return Type.LONG; 064 case Const.F2D: 065 case Const.I2D: 066 case Const.L2D: 067 return Type.DOUBLE; 068 case Const.I2B: 069 return Type.BYTE; 070 case Const.I2C: 071 return Type.CHAR; 072 case Const.I2S: 073 return Type.SHORT; 074 default: // Never reached 075 throw new ClassGenException("Unknown type " + _opcode); 076 } 077 } 078}