001// Copyright 2010 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.services.MethodInvocationResult;
018
019/**
020 * Implementation of {@link MethodInvocationResult} for failed
021 * invocations (where a checked exception was thrown).
022 * 
023 * @since 5.2.0
024 */
025public class MethodInvocationFailResult implements MethodInvocationResult
026{
027    private final Throwable thrown;
028
029    public MethodInvocationFailResult(Throwable thrown)
030    {
031        this.thrown = thrown;
032    }
033
034    public Object getReturnValue()
035    {
036        return null;
037    }
038
039    public <T extends Throwable> T getThrown(Class<T> throwableClass)
040    {
041        if (throwableClass.isInstance(thrown))
042            return throwableClass.cast(thrown);
043
044        return null;
045    }
046
047    public boolean isFail()
048    {
049        return true;
050    }
051
052    public void rethrow()
053    {
054        throw new RuntimeException(thrown);
055    }
056}