/**

  * 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.term.TermDefinition;

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

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

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

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

 import java.util.HashMap;

 import java.util.Map;

 public class TermBusRule extends MaintenanceDocumentRuleBase {

     @Override

     protected boolean processCustomSaveDocumentBusinessRules(MaintenanceDocument document) {

         boolean isValid = true;

         TermBo term = (TermBo) document.getNewMaintainableObject().getDataObject();

         isValid &= validateId(term);

         isValid &= validateDescriptionNamespace(term);

         return isValid;

     }

     private boolean validateId(TermBo term) {

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

             TermDefinition termInDatabase = getTermBoService().getTermById(term.getId());

             if ((termInDatabase  != null) && (!StringUtils.equals(termInDatabase.getId(), term.getId()))) {

                 this.putFieldError(KRMSPropertyConstants.Term.TERM_ID, "error.term.duplicateId");

                 return false;

             }

         }

         return true;

     }

     /**

      * Check if the name-namespace pair already exist.

      * @param term

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

      */

     private boolean validateDescriptionNamespace(TermBo term) {

         if (StringUtils.isNotBlank(term.getDescription()) && StringUtils.isNotBlank(

                 term.getSpecification().getNamespace())) {

             Map<String, String> criteria = new HashMap<String, String>();

             criteria.put("description", term.getDescription());

             criteria.put("specification.namespace", term.getSpecification().getNamespace());

             TermBo termInDatabase = getBoService().findByPrimaryKey(TermBo.class, criteria);

             if((termInDatabase != null) && (!StringUtils.equals(termInDatabase.getId(), term.getId()))) {

                 this.putFieldError(KRMSPropertyConstants.Term.DESCRIPTION, "error.term.duplicateNameNamespace");

                 return false;

             }

         }

         return true;

     }

     public TermBoService getTermBoService() {

         return KrmsRepositoryServiceLocator.getTermBoService();

     }

 }