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Central module for Tapestry, containing interfaces to the Java
Servlet API and all core services and components.
// Copyright 2010 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.Link;
import org.apache.tapestry5.model.ComponentModel;
import org.apache.tapestry5.runtime.Component;
import org.apache.tapestry5.services.ComponentClassResolver;
import org.apache.tapestry5.services.ComponentEventRequestParameters;
import org.apache.tapestry5.services.ComponentSource;
import org.apache.tapestry5.services.LinkCreationListener2;
import org.apache.tapestry5.services.PageRenderRequestParameters;
/**
* A default {@link LinkCreationListener2} that triggers the {@link EventConstants#DECORATE_COMPONENT_EVENT_LINK} and
* {@link EventConstants#DECORATE_PAGE_RENDER_LINK} events as links are generated.
*
* @since 5.2.0
*/
public class LinkDecorationListener implements LinkCreationListener2
{
private final ComponentClassResolver resolver;
private final ComponentSource componentSource;
private final ComponentModelSource modelSource;
public LinkDecorationListener(ComponentClassResolver resolver, ComponentSource componentSource,
ComponentModelSource modelSource)
{
this.resolver = resolver;
this.componentSource = componentSource;
this.modelSource = modelSource;
}
public void createdComponentEventLink(Link link, ComponentEventRequestParameters parameters)
{
trigger(parameters.getActivePageName(), EventConstants.DECORATE_COMPONENT_EVENT_LINK, link, parameters);
}
public void createdPageRenderLink(Link link, PageRenderRequestParameters parameters)
{
trigger(parameters.getLogicalPageName(), EventConstants.DECORATE_PAGE_RENDER_LINK, link, parameters);
}
private void trigger(String pageName, String eventType, Link link, Object parameters)
{
String pageClassName = resolver.resolvePageNameToClassName(pageName);
ComponentModel model = modelSource.getModel(pageClassName);
if (model.handlesEvent(eventType))
{
Component page = componentSource.getPage(pageName);
page.getComponentResources().triggerEvent(eventType, new Object[]
{ link, parameters }, null);
}
}
}