001// Copyright 2006, 2007, 2008, 2009, 2011 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.ComponentResources;
018import org.apache.tapestry5.ioc.annotations.Marker;
019import org.apache.tapestry5.ioc.annotations.Primary;
020import org.apache.tapestry5.runtime.Component;
021import org.apache.tapestry5.services.ComponentEventResultProcessor;
022import org.apache.tapestry5.services.Traditional;
023import org.slf4j.Logger;
024
025import java.io.IOException;
026
027@Marker({Traditional.class, ComponentInstanceProcessor.class})
028public class ComponentInstanceResultProcessor implements ComponentEventResultProcessor<Component>
029{
030    private final Logger logger;
031
032    private final ComponentEventResultProcessor resultProcessor;
033
034    public ComponentInstanceResultProcessor(Logger logger,
035                                            @Traditional @Primary ComponentEventResultProcessor resultProcessor)
036    {
037        this.logger = logger;
038        this.resultProcessor = resultProcessor;
039    }
040
041    public void processResultValue(Component value) throws IOException
042    {
043        ComponentResources resources = value.getComponentResources();
044
045        if (resources.getContainer() != null)
046        {
047            logger.warn(String.format("Component %s was returned from an event handler method, but is not a page component. The page containing the component will render the client response.", value.getComponentResources().getCompleteId()));
048        }
049
050        resultProcessor.processResultValue(resources.getPageName());
051    }
052}