/*

  * Copyright 2007 The Kuali Foundation

  * 

  * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php

  * 

  * 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.kuali.rice.kns.web.servlet;

 import java.io.InputStream;

 import java.util.ArrayList;

 import java.util.List;

 import javax.servlet.ServletConfig;

 import javax.servlet.ServletException;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.util.ClassLoaderUtils;

 import org.kuali.rice.kns.service.KNSServiceLocator;

 import org.kuali.rice.kns.service.ModuleService;

 import org.kuali.rice.kns.util.KNSConstants;

 import org.kuali.rice.kns.util.spring.NamedOrderedListBean;

 import org.springframework.core.io.DefaultResourceLoader;

 import uk.ltd.getahead.dwr.Configuration;

 import uk.ltd.getahead.dwr.DWRServlet;

 public class KualiDWRServlet extends DWRServlet {

         /**

          * 

          */

         private static final long serialVersionUID = -3903455224197903186L;

         private static final String CLASSPATH_RESOURCE_PREFIX = "classpath.resource.prefix";

         public static List<String> HACK_ADDITIONAL_FILES = new ArrayList<String>();

         private Boolean springBasedConfigPath;

         @Override

         public void init(ServletConfig config) throws ServletException {

                 setSpringBasedConfigPath(new Boolean(config.getInitParameter("springpath")));

                 super.init(config);

         }

         /**

          * This method calls the super version then loads the dwr config file

          * specified in the loaded module definitions.

          * 

          * @see uk.ltd.getahead.dwr.DWRServlet#configure(javax.servlet.ServletConfig,

          *      uk.ltd.getahead.dwr.Configuration)

          */

         @Override

         public void configure(ServletConfig servletConfig, Configuration configuration) throws ServletException {

                 String classpathResourcePrefix = KNSServiceLocator.getKualiConfigurationService().getPropertyString(CLASSPATH_RESOURCE_PREFIX);

                 for (NamedOrderedListBean namedOrderedListBean : KNSServiceLocator.getNamedOrderedListBeans(KNSConstants.SCRIPT_CONFIGURATION_FILES_LIST_NAME)) {

                         for (String scriptConfigurationFilePath : namedOrderedListBean.getList()) {

                                 if (getSpringBasedConfigPath()) {

                                         DefaultResourceLoader resourceLoader = new DefaultResourceLoader(ClassLoaderUtils.getDefaultClassLoader());

                                         try {

                                                 InputStream is = resourceLoader.getResource(scriptConfigurationFilePath).getInputStream();

                                                 configuration.addConfig(is);

                                         } catch (Exception e) {

                                                 throw new ServletException(e);

                                         }

                                 } else {

                                         super.readFile(classpathResourcePrefix + 

                                                         scriptConfigurationFilePath, configuration);

                                 }

                         }

                 }

                 for (ModuleService moduleService : KNSServiceLocator.getKualiModuleService().getInstalledModuleServices()) {

                         for (String scriptConfigurationFilePath : moduleService.getModuleConfiguration().getScriptConfigurationFilePaths()) {

                                 if (!StringUtils.isBlank(scriptConfigurationFilePath))

                                         super.readFile(classpathResourcePrefix + scriptConfigurationFilePath, configuration);

                         }        

                 }

                 for (String configFile : HACK_ADDITIONAL_FILES) {

                         super.readFile(classpathResourcePrefix + configFile, configuration);

                 }

         }

         public Boolean getSpringBasedConfigPath() {

                 return springBasedConfigPath;

         }

         public void setSpringBasedConfigPath(Boolean springBasedConfigPath) {

                 this.springBasedConfigPath = springBasedConfigPath;

         }

 }