    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}