// Copyright 2006, 2007, 2008, 2009, 2010, 2011 The Apache Software Foundation
//
// Licensed 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.tapestry5.internal.services;
import org.apache.tapestry5.TrackableComponentEventCallback;
import org.apache.tapestry5.internal.structure.ComponentPageElement;
import org.apache.tapestry5.internal.structure.Page;
import org.apache.tapestry5.ioc.annotations.Primary;
import org.apache.tapestry5.ioc.internal.util.TapestryException;
import org.apache.tapestry5.services.*;
import java.io.IOException;
@SuppressWarnings("unchecked")
public class ComponentEventRequestHandlerImpl implements ComponentEventRequestHandler
{
private final ComponentEventResultProcessor resultProcessor;
private final RequestPageCache cache;
private final Response response;
private final PageActivator pageActivator;
private final Environment environment;
public ComponentEventRequestHandlerImpl(@Traditional
@Primary
ComponentEventResultProcessor resultProcessor,
RequestPageCache cache, Response response,
PageActivator pageActivator,
Environment environment)
{
this.resultProcessor = resultProcessor;
this.cache = cache;
this.response = response;
this.pageActivator = pageActivator;
this.environment = environment;
}
public void handle(ComponentEventRequestParameters parameters) throws IOException
{
Page activePage = cache.get(parameters.getActivePageName());
if (pageActivator.activatePage(activePage.getRootElement().getComponentResources(), parameters
.getPageActivationContext(), resultProcessor))
{
return;
}
Page containerPage = cache.get(parameters.getContainingPageName());
TrackableComponentEventCallback callback = new ComponentResultProcessorWrapper(resultProcessor);
environment.push(ComponentEventResultProcessor.class, resultProcessor);
environment.push(TrackableComponentEventCallback.class, callback);
ComponentPageElement element = containerPage.getComponentElementByNestedId(parameters.getNestedComponentId());
boolean handled = element.triggerContextEvent(parameters.getEventType(), parameters.getEventContext(), callback);
if (!handled)
{
throw new TapestryException(String.format("Request event '%s' (on component %s) was not handled; you must provide a matching event handler method in the component or in one of its containers.", parameters.getEventType(), element.getCompleteId()), element,
null);
}
environment.pop(TrackableComponentEventCallback.class);
environment.pop(ComponentEventResultProcessor.class);
if (callback.isAborted())
{
callback.rethrow();
return;
}
// If we get this far without generating a response, the default behavior is to
// generate a redirect back to the active page; we can let the ComponentEventResultProcessor handle that.
if (!response.isCommitted())
{
resultProcessor.processResultValue(activePage.getName());
}
}
}