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*/
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
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* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
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* Unless required by applicable law or agreed to in writing, software
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package com.sun.org.apache.bcel.internal.generic;
import com.sun.org.apache.bcel.internal.Constants;
import com.sun.org.apache.bcel.internal.ExceptionConstants;
Super class for the xRETURN family of instructions.
Author: M. Dahm
/**
* Super class for the xRETURN family of instructions.
*
* @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
*/
public abstract class ReturnInstruction extends Instruction
implements ExceptionThrower, TypedInstruction, StackConsumer {
Empty constructor needed for the Class.newInstance() statement in
Instruction.readInstruction(). Not to be used otherwise.
/**
* Empty constructor needed for the Class.newInstance() statement in
* Instruction.readInstruction(). Not to be used otherwise.
*/
ReturnInstruction() {}
Params: - opcode – of instruction
/**
* @param opcode of instruction
*/
protected ReturnInstruction(short opcode) {
super(opcode, (short)1);
}
public Type getType() {
switch(opcode) {
case Constants.IRETURN: return Type.INT;
case Constants.LRETURN: return Type.LONG;
case Constants.FRETURN: return Type.FLOAT;
case Constants.DRETURN: return Type.DOUBLE;
case Constants.ARETURN: return Type.OBJECT;
case Constants.RETURN: return Type.VOID;
default: // Never reached
throw new ClassGenException("Unknown type " + opcode);
}
}
public Class[] getExceptions() {
return new Class[] { ExceptionConstants.ILLEGAL_MONITOR_STATE };
}
Returns: type associated with the instruction
/** @return type associated with the instruction
*/
public Type getType(ConstantPoolGen cp) {
return getType();
}
}