/*
* $Id: DWRValidator.java 439747 2006-09-03 09:22:46Z mrdon $
*
* Copyright 2006 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.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.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(cfg, namespace, action, ctx);
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(ActionProxy proxy, Map extraContext) throws Exception {
super(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(Configuration config, String namespace, String actionName, Map extraContext) throws Exception {
super(config, namespace, actionName, extraContext, false, true);
}
protected void prepare() throws Exception {
invocation = new ValidatorActionInvocation(this, extraContext);
}
}
}