1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 package com.sun.org.apache.bcel.internal.generic; 23 24 import com.sun.org.apache.bcel.internal.Constants; 25 import com.sun.org.apache.bcel.internal.ExceptionConstants; 26 27 /** 28 * Super class for the xRETURN family of instructions. 29 * 30 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 31 */ 32 public abstract class ReturnInstruction extends Instruction 33 implements ExceptionThrower, TypedInstruction, StackConsumer { 34 /** 35 * Empty constructor needed for the Class.newInstance() statement in 36 * Instruction.readInstruction(). Not to be used otherwise. 37 */ 38 ReturnInstruction() {} 39 40 /** 41 * @param opcode of instruction 42 */ 43 protected ReturnInstruction(short opcode) { 44 super(opcode, (short)1); 45 } 46 47 public Type getType() { 48 switch(opcode) { 49 case Constants.IRETURN: return Type.INT; 50 case Constants.LRETURN: return Type.LONG; 51 case Constants.FRETURN: return Type.FLOAT; 52 case Constants.DRETURN: return Type.DOUBLE; 53 case Constants.ARETURN: return Type.OBJECT; 54 case Constants.RETURN: return Type.VOID; 55 56 default: // Never reached 57 throw new ClassGenException("Unknown type " + opcode); 58 } 59 } 60 61 public Class[] getExceptions() { 62 return new Class[] { ExceptionConstants.ILLEGAL_MONITOR_STATE }; 63 } 64 65 /** @return type associated with the instruction 66 */ 67 public Type getType(ConstantPoolGen cp) { 68 return getType(); 69 } 70 }