/*****************************************************************************
* Copyright (C) NanoContainer Organization. All rights reserved. *
* ------------------------------------------------------------------------- *
* The software in this package is published under the terms of the BSD *
* style license a copy of which has been included with this distribution in *
* the LICENSE.txt file. *
* *
*****************************************************************************/
package org.nanocontainer.nanowar.webwork;
import javax.servlet.http.HttpServletRequest;
import org.nanocontainer.nanowar.ActionsContainerFactory;
import org.nanocontainer.nanowar.KeyConstants;
import org.picocontainer.MutablePicoContainer;
import org.picocontainer.PicoIntrospectionException;
import org.picocontainer.defaults.ObjectReference;
import webwork.action.Action;
import webwork.action.ServletActionContext;
import webwork.action.factory.ActionFactory;
/**
* Replacement for the standard WebWork JavaActionFactory that uses a
* PicoContainer to resolve all of the dependencies an Action may have.
*
* @author <a href="mailto:joe@thoughtworks.net">Joe Walnes</a>
* @author Mauro Talevi
*/
public class PicoActionFactory extends ActionFactory {
private ActionsContainerFactory actionsContainerFactory = new ActionsContainerFactory();
public Action getActionImpl(String className) throws Exception {
try {
Class actionClass = actionsContainerFactory.getActionClass(className);
Action action = null;
try {
action = instantiateAction(actionClass);
} catch (Exception e) {
//swallow these exceptions and return null action
}
return action;
} catch (PicoIntrospectionException e) {
return null;
}
}
protected Action instantiateAction(Class actionClass) {
MutablePicoContainer actionsContainer = getActionsContainer();
Action action = (Action) actionsContainer.getComponentInstance(actionClass);
if (action == null) {
// The action wasn't registered. Attempt to instantiate it.
actionsContainer.registerComponentImplementation(actionClass);
action = (Action) actionsContainer.getComponentInstance(actionClass);
}
return action;
}
/**
* Return actions container, first try using the ActionsContainerFactory,
* than in WebWork ActionContext.
*/
private MutablePicoContainer getActionsContainer() {
HttpServletRequest request = ServletActionContext.getRequest();
if ( request != null ) {
return actionsContainerFactory.getActionsContainer(request);
} else {
ObjectReference ref = new ActionContextScopeObjectReference(KeyConstants.REQUEST_CONTAINER);
return (MutablePicoContainer) ref.get();
}
}
}