/**

  * Copyright 2005-2011 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.krms.impl.rule;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.krad.document.MaintenanceDocument;

 import org.kuali.rice.krad.rules.MaintenanceDocumentRuleBase;

 import org.kuali.rice.krms.api.repository.context.ContextDefinition;

 import org.kuali.rice.krms.impl.repository.ContextBo;

 import org.kuali.rice.krms.impl.repository.ContextBoService;

 import org.kuali.rice.krms.impl.repository.KrmsRepositoryServiceLocator;

 import org.kuali.rice.krms.impl.util.KRMSPropertyConstants;

 public class ContextBusRule extends MaintenanceDocumentRuleBase {

     @Override

     protected boolean processCustomSaveDocumentBusinessRules(MaintenanceDocument document) {

         boolean isValid = true;

         ContextBo context = (ContextBo) document.getNewMaintainableObject().getDataObject();

         isValid &= validateId(context);

         isValid &= validateNameNamespace(context);

         return isValid;

     }

     private boolean validateId(ContextBo context) {

         if (StringUtils.isNotBlank(context.getId())) {

             ContextDefinition contextInDatabase = getContextBoService().getContextByContextId(context.getId());

             if ((contextInDatabase  != null) && (!StringUtils.equals(contextInDatabase.getId(), context.getId()))) {

                 this.putFieldError(KRMSPropertyConstants.Context.CONTEXT_ID, "error.context.duplicateId");

                 return false;

             }

         }

         return true;

     }

     /**

      * Check if the name-namespace pair already exist.

      * @param context

      * @return true if the name-namespace pair is unique, false otherwise

      */

     private boolean validateNameNamespace(ContextBo context) {

         if (StringUtils.isNotBlank(context.getName()) && StringUtils.isNotBlank(context.getNamespace())) {

             ContextDefinition contextInDatabase = getContextBoService().getContextByNameAndNamespace(context.getName(), context.getNamespace());

             if((contextInDatabase != null) && (!StringUtils.equals(contextInDatabase.getId(), context.getId()))) {

                 this.putFieldError(KRMSPropertyConstants.Context.NAME, "error.context.duplicateNameNamespace");

                 return false;

             }

         }

         return true;

     }

     public ContextBoService getContextBoService() {

         return KrmsRepositoryServiceLocator.getContextBoService();

     }

 }