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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.bcel.generic;
import org.apache.bcel.Const;
import org.apache.bcel.ExceptionConst;
/**
* Super class for the xRETURN family of instructions.
*
* @version $Id$
*/
public abstract class ReturnInstruction extends Instruction implements ExceptionThrower,
TypedInstruction, StackConsumer {
/**
* Empty constructor needed for Instruction.readInstruction.
* Not to be used otherwise.
*/
ReturnInstruction() {
}
/**
* @param opcode of instruction
*/
protected ReturnInstruction(final short opcode) {
super(opcode, (short) 1);
}
public Type getType() {
final short _opcode = super.getOpcode();
switch (_opcode) {
case Const.IRETURN:
return Type.INT;
case Const.LRETURN:
return Type.LONG;
case Const.FRETURN:
return Type.FLOAT;
case Const.DRETURN:
return Type.DOUBLE;
case Const.ARETURN:
return Type.OBJECT;
case Const.RETURN:
return Type.VOID;
default: // Never reached
throw new ClassGenException("Unknown type " + _opcode);
}
}
@Override
public Class<?>[] getExceptions() {
return new Class[] {
ExceptionConst.ILLEGAL_MONITOR_STATE
};
}
/** @return type associated with the instruction
*/
@Override
public Type getType( final ConstantPoolGen cp ) {
return getType();
}
}
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