/*

  * Copyright 2006-2008 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.util;

 import org.apache.struts.action.ActionMessage;

 import org.apache.struts.action.ActionMessages;

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

 import org.kuali.rice.krad.util.ErrorMessage;

 import org.kuali.rice.krad.util.MessageMap;

 import org.springframework.util.AutoPopulatingList;

 import java.io.Serializable;

 import java.util.ArrayList;

 import java.util.Iterator;

 import java.util.List;

 /**

  * Provides access to a copy of an ErrorMap and information derived from it. Necessary because ErrorMap implements the Map

  * interface, which for some reason makes JSTL unwilling to translate ErrorMap.errorCount into a call to the getErrorCount method of

  * that ErrorMap instance.

  * 

  * Since I had to create this class to provide easy access to the error count (which must be computed as the sum of the sizes of the

  * error message lists of all properties in the ErrorMap), I also moved in the existing code which massaged the contents of the

  * ErrorMap for the purposes of export to the JSP.

  * 

  * 

  */

 public class ErrorContainer implements Serializable {

     private final MessageMap errorMap;

     private final int errorCount;

     /**

      * Constructs an ErrorContainer

      * 

      * @param errorMap

      */

     public ErrorContainer(MessageMap errorMap) {

         this.errorMap = errorMap;

         this.errorCount = errorMap.getErrorCount();

     }

     /**

      * @return number of errors in the ErrorMap used to initialize this container

      */

     public int getErrorCount() {

             if (hasFormatterError()) {

                     return 0;

             }

         return errorCount;

     }

     /**

      * @return simple List of all properies for which errorMessages exist in the ErrorMap used to initialize this container

      */

     public List getErrorPropertyList() {

         List properties = new ArrayList();

         for (Iterator iter = errorMap.getAllPropertiesWithErrors().iterator(); iter.hasNext();) {

             properties.add(iter.next());

         }

         return properties;

     }

     /**

      * This method checks whether the errorMap contains at least a formatter error.

      * @return boolean true if the errorMap contains a formatter error and false otherwise

      */

     private boolean hasFormatterError() {

             if (errorMap.getErrorCount()>0) {

             for (String errorKey : errorMap.getAllPropertiesWithErrors()) {

                     AutoPopulatingList errorValues = errorMap.getMessages(errorKey);

                     for (ErrorMessage errorMessage : (List<ErrorMessage>)errorValues) {

                     if (errorMessage.getErrorKey().equals(RiceKeyConstants.ERROR_DOCUMENT_MAINTENANCE_FORMATTING_ERROR)) {

                         return true;

                     }

                     }

             }

         }

         return false;

     }

     /**

      * @return ActionMessages instance containing error messages constructed from the contents of the ErrorMap with which this

      *         container was initialized

      */

     public ActionMessages getRequestErrors() {

         ActionMessages requestErrors = new ActionMessages();

         for (Iterator iter = errorMap.getAllPropertiesWithErrors().iterator(); iter.hasNext();) {

             String property = (String) iter.next();

             List errorList = (List) errorMap.getErrorMessagesForProperty(property);

             for (Iterator iterator = errorList.iterator(); iterator.hasNext();) {

                 ErrorMessage errorMessage = (ErrorMessage) iterator.next();

                 // add ActionMessage with any parameters

                 requestErrors.add(property, new ActionMessage(errorMessage.getErrorKey(), errorMessage.getMessageParameters()));

             }

         }

         return requestErrors;

     }

 }