// Copyright 2006, 2007, 2008, 2009 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.EventConstants;
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;
public class ComponentEventRequestHandlerImpl implements ComponentEventRequestHandler
{
private final ComponentEventResultProcessor resultProcessor;
private final RequestPageCache cache;
private final Response response;
private final ActionRenderResponseGenerator generator;
private final Environment environment;
public ComponentEventRequestHandlerImpl(
@Traditional @Primary
ComponentEventResultProcessor resultProcessor,
RequestPageCache cache, Response response,
ActionRenderResponseGenerator generator,
Environment environment)
{
this.resultProcessor = resultProcessor;
this.cache = cache;
this.response = response;
this.generator = generator;
this.environment = environment;
}
public void handle(ComponentEventRequestParameters parameters) throws IOException
{
Page activePage = cache.get(parameters.getActivePageName());
ComponentResultProcessorWrapper callback = new ComponentResultProcessorWrapper(resultProcessor);
// If activating the page returns a "navigational result", then don't trigger the action
// on the component.
activePage.getRootElement().triggerContextEvent(EventConstants.ACTIVATE,
parameters.getPageActivationContext(), callback);
if (callback.isAborted()) return;
Page containerPage = cache.get(parameters.getContainingPageName());
ComponentPageElement element = containerPage.getComponentElementByNestedId(parameters.getNestedComponentId());
environment.push(ComponentEventResultProcessor.class, resultProcessor);
boolean handled = element.triggerContextEvent(parameters.getEventType(), parameters.getEventContext(),
callback);
if (!handled)
throw new TapestryException(ServicesMessages.eventNotHandled(element, parameters.getEventType()), element,
null);
environment.pop(ComponentEventResultProcessor.class);
if (callback.isAborted()) return;
if (!response.isCommitted()) generator.generateResponse(activePage);
}
}