| /* |
| * Copyright (c) 2017, 2020, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * 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 com.sun.org.apache.bcel.internal.generic; |
| |
| import com.sun.org.apache.bcel.internal.Const; |
| import com.sun.org.apache.bcel.internal.ExceptionConst; |
| |
| /** |
| * Super class for the xRETURN family of instructions. |
| * |
| * @LastModified: Jan 2020 |
| */ |
| 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(); |
| } |
| } |