/*
* $Id: DWRValidator.java 476642 2006-11-18 22:40:18Z mrdon $
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.struts2.validators;
import java.util.HashMap;
import java.util.Map;
import javax.servlet.ServletContext;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts2.dispatcher.ApplicationMap;
import org.apache.struts2.dispatcher.Dispatcher;
import org.apache.struts2.dispatcher.RequestMap;
import org.apache.struts2.dispatcher.SessionMap;
import uk.ltd.getahead.dwr.WebContextFactory;
import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.DefaultActionInvocation;
import com.opensymphony.xwork2.DefaultActionProxy;
import com.opensymphony.xwork2.ObjectFactory;
import com.opensymphony.xwork2.UnknownHandler;
import com.opensymphony.xwork2.ValidationAware;
import com.opensymphony.xwork2.ValidationAwareSupport;
import com.opensymphony.xwork2.config.Configuration;
import com.opensymphony.xwork2.config.entities.ActionConfig;
/**
* <p/>
* Use the dwr configuration as follows :-
*
* <pre>
* <!-- START SNIPPET: dwrConfiguration -->
*
* <dwr<
* <allow<
* <create creator="new" javascript="validator" class="org.apache.struts2.validators.DWRValidator"/<
* <convert converter="bean" match="com.opensymphony.xwork2.ValidationAwareSupport"/<
* </allow<
* </dwr<
*
* <!-- END SNIPPET: dwrConfiguration -->
* </pre>
*/
public class DWRValidator {
private static final Log LOG = LogFactory.getLog(DWRValidator.class);
public ValidationAwareSupport doPost(String namespace, String action, Map params) throws Exception {
HttpServletRequest req = WebContextFactory.get().getHttpServletRequest();
ServletContext servletContext = WebContextFactory.get().getServletContext();
HttpServletResponse res = WebContextFactory.get().getHttpServletResponse();
Map requestParams = new HashMap(req.getParameterMap());
if (params != null) {
requestParams.putAll(params);
} else {
params = requestParams;
}
Map requestMap = new RequestMap(req);
Map session = new SessionMap(req);
Map application = new ApplicationMap(servletContext);
Dispatcher du = Dispatcher.getInstance();
HashMap ctx = du.createContextMap(requestMap,
params,
session,
application,
req,
res,
servletContext);
try {
Configuration cfg = du.getConfigurationManager().getConfiguration();
ValidatorActionProxy proxy = new ValidatorActionProxy(namespace, action, ctx);
cfg.getContainer().inject(proxy);
proxy.prepare();
proxy.execute();
Object a = proxy.getAction();
if (a instanceof ValidationAware) {
ValidationAware aware = (ValidationAware) a;
ValidationAwareSupport vas = new ValidationAwareSupport();
vas.setActionErrors(aware.getActionErrors());
vas.setActionMessages(aware.getActionMessages());
vas.setFieldErrors(aware.getFieldErrors());
return vas;
} else {
return null;
}
} catch (Exception e) {
LOG.error("Error while trying to validate", e);
return null;
}
}
public static class ValidatorActionInvocation extends DefaultActionInvocation {
private static final long serialVersionUID = -7645433725470191275L;
protected ValidatorActionInvocation(ObjectFactory objectFactory, UnknownHandler handler, ActionProxy proxy, Map extraContext) throws Exception {
super(objectFactory, handler, proxy, extraContext, true);
}
protected String invokeAction(Object action, ActionConfig actionConfig) throws Exception {
return Action.NONE; // don't actually execute the action
}
}
public static class ValidatorActionProxy extends DefaultActionProxy {
private static final long serialVersionUID = 5754781916414047963L;
protected ValidatorActionProxy(String namespace, String actionName, Map extraContext) throws Exception {
super(namespace, actionName, extraContext, false, true);
}
public void prepare() throws Exception {
super.prepare();
invocation = new ValidatorActionInvocation(objectFactory, unknownHandler, this, extraContext);
}
}
}