/**
* Copyright 2006 Webmedia Group Ltd.
*
* 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.araneaframework.framework.container;
import org.araneaframework.InputData;
import org.araneaframework.Message;
import org.araneaframework.OutputData;
import org.araneaframework.Path;
import org.araneaframework.Service;
import org.araneaframework.core.BaseWidget;
import org.araneaframework.core.StandardPath;
/**
* A widget that contains a child service. Calls the service's action only if it gets
* an event.
*
* @author "Toomas Römer" <toomas@webmedia.ee>
*/
public class StandardServiceAdapterWidget extends BaseWidget {
public static final String ACTION_PATH_INPUT_DATA_PARAMETER = "widgetSubServiceActionId";
private Service childService;
private boolean eventReceived;
private transient InputData input;
/**
* Set the child service.
*/
public void setChildService(Service service) {
childService = service;
}
protected void init() throws Exception {
childService._getComponent().init(getEnvironment());
}
/**
* Returns the path of action from the InputData. Uses the
* ACTION_PATH_INPUT_DATA_PARAMETER to get the path.
*/
protected Path getActionPath(InputData input) {
return new StandardPath((String) input.getGlobalData().get(ACTION_PATH_INPUT_DATA_PARAMETER));
}
public void update(InputData input) {
this.input = input;
eventReceived = false;
}
protected void propagate(Message message) throws Exception {
message.send(null, childService);
}
//Puts eventReceived flag if
public void event(Path path, InputData input) {
if (!path.hasNext()) {
eventReceived = true;
}
}
/**
* Calls child service's action only if an event was received. The action path
* is constructed via <code>getActionPath(InputData)</code>. The InputData is
* saved in the <code>update(InputData)</code> method.
*/
public void render(OutputData output) throws Exception {
if (eventReceived) {
this.childService._getService().action(getActionPath(input), input, output);
}
}
protected void destroy() throws Exception {
childService._getComponent().destroy();
}
}