// Copyright 2007, 2008 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.tapestry.internal.services;
import org.apache.tapestry.ComponentResources;
import org.apache.tapestry.internal.structure.Page;
import org.apache.tapestry.runtime.Component;
import org.apache.tapestry.runtime.RenderCommand;
import org.apache.tapestry.services.ComponentEventResultProcessor;
import java.io.IOException;
/**
* Performs a partial page render based on a root component.
*/
public class AjaxComponentInstanceEventResultProcessor implements ComponentEventResultProcessor<Component>
{
private final RequestPageCache _cache;
private final AjaxPartialResponseRenderer _renderer;
public AjaxComponentInstanceEventResultProcessor(AjaxPartialResponseRenderer renderer, RequestPageCache cache)
{
_renderer = renderer;
_cache = cache;
}
public void processResultValue(Component value) throws IOException
{
ComponentResources resources = value.getComponentResources();
String pageName = resources.getPageName();
Page page = _cache.get(pageName);
String nestedId = resources.getNestedId();
// The user may return a complete page instance, which isn't really a partial render, I guess.
// Depends on the structure of the page returned.
RenderCommand command = nestedId == null ? page.getRootElement() : page.getComponentElementByNestedId(nestedId);
_renderer.renderPartialPageMarkup(command);
}
}