/*

  * Copyright 2006-2011 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.repository;

 import org.apache.commons.lang.StringUtils;

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

 import org.kuali.rice.krms.api.repository.KrmsAttributeDefinition;

 import org.kuali.rice.krms.api.repository.KrmsAttributeDefinitionService;

 import java.util.*;

 public final class KrmsAttributeDefinitionServiceImpl implements KrmsAttributeDefinitionService {

     private BusinessObjectService businessObjectService;

         @Override

         public void createAttributeDefinition(KrmsAttributeDefinition attributeDefinition) {

                 if (attributeDefinition == null){

                 throw new IllegalArgumentException("attributeDefinition is null");

                 }

                 final String idKey = attributeDefinition.getId();

                 final KrmsAttributeDefinition existing = getAttributeDefinitionById(idKey);

                 if (existing != null && existing.getId().equals(idKey)){

             throw new IllegalStateException("the krms attribute definition to create already exists: " + attributeDefinition);                        

                 }

                 businessObjectService.save(KrmsAttributeDefinitionBo.from(attributeDefinition));

         }

         @Override

         public void updateAttributeDefinition(KrmsAttributeDefinition attributeDefinition) {

                 if (attributeDefinition == null){

                 throw new IllegalArgumentException("attributeDefinition is null");

                 }

                 final String nameKey = attributeDefinition.getName();

                 final String namespaceKey = attributeDefinition.getNamespace();

                 final KrmsAttributeDefinition existing = getAttributeDefinitionByNameAndNamespace(nameKey, namespaceKey);

                 if (existing == null){

             throw new IllegalStateException("the krms attribute definition does not exist: " + attributeDefinition);                        

                 }

                 final KrmsAttributeDefinition toUpdate;

                 if (!existing.getId().equals(attributeDefinition.getId())){

                         final KrmsAttributeDefinition.Builder builder = KrmsAttributeDefinition.Builder.create(attributeDefinition);

                         builder.setId(existing.getId());

                         toUpdate = builder.build();

                 } else {

                         toUpdate = attributeDefinition;

                 }

                 businessObjectService.save(KrmsAttributeDefinitionBo.from(toUpdate));

         }

         @Override

     public KrmsAttributeDefinition getAttributeDefinitionById(final String id) {

         if (StringUtils.isBlank(id)) {

             throw new IllegalArgumentException("id is blank");

         }

         KrmsAttributeDefinitionBo bo = businessObjectService.findBySinglePrimaryKey(KrmsAttributeDefinitionBo.class, id);

         return KrmsAttributeDefinitionBo.to(bo);

     }

     @Override

     public KrmsAttributeDefinition getAttributeDefinitionByNameAndNamespace(final String name, final String namespace) {

         if (StringUtils.isBlank(name)) {

             throw new IllegalArgumentException("name is blank");

         }

         if (StringUtils.isBlank(namespace)) {

             throw new IllegalArgumentException("namespace is blank");

         }

         final Map<String, Object> map = new HashMap<String, Object>();

         map.put("name", name);

         map.put("namespace", namespace);

         Collection<KrmsAttributeDefinitionBo> definitionList = businessObjectService.findMatching(KrmsAttributeDefinitionBo.class, Collections.unmodifiableMap(map));

         if (definitionList == null || definitionList.isEmpty()) {

             return null;

         } else if (definitionList.size() == 1) {

             return KrmsAttributeDefinitionBo.to(definitionList.iterator().next());

         } else throw new IllegalStateException("Multiple KkrmsAttributeDefinitions found with same name and namespace");

     }

     @Override

     public List<KrmsAttributeDefinition> findAttributeDefinitionsByNamespace(final String namespace) {

         final Map<String, Object> map = new HashMap<String, Object>();

         map.put("namespace", namespace);

         map.put("active", Boolean.TRUE);

         Collection<KrmsAttributeDefinitionBo> krmsAttributeDefinitionBos = businessObjectService.findMatching(KrmsAttributeDefinitionBo.class, Collections.unmodifiableMap(map));

         return convertListOfBosToImmutables(krmsAttributeDefinitionBos);

     }

     @Override

     public List<KrmsAttributeDefinition> findAllAttributeDefinitions() {

         final Map<String, Object> map = new HashMap<String, Object>();

         map.put("active", Boolean.TRUE);

         Collection<KrmsAttributeDefinitionBo> krmsAttributeDefinitionBos = businessObjectService.findMatching(KrmsAttributeDefinitionBo.class, Collections.unmodifiableMap(map));

         return convertListOfBosToImmutables(krmsAttributeDefinitionBos);

     }

     /**

      * Sets the businessObjectService attribute value.

      *

      * @param businessObjectService The businessObjectService to set.

      */

     public void setBusinessObjectService(final BusinessObjectService businessObjectService) {

         this.businessObjectService = businessObjectService;

     }

     /**

      * Converts a List<KrmsAttributeDefinitionBo> to an Unmodifiable List<KrmsAttributeDefinition>

      *

      * @param krmsAttributeDefinitionBos a mutable List<KrmsAttributeDefinitionBo> to made completely immutable.

      * @return An unmodifiable List<KrmsAttributeDefinition>

      */

     List<KrmsAttributeDefinition> convertListOfBosToImmutables(final Collection<KrmsAttributeDefinitionBo> krmsAttributeDefinitionBos) {

         ArrayList<KrmsAttributeDefinition> krmsAttributeDefinitions = new ArrayList<KrmsAttributeDefinition>();

         for (KrmsAttributeDefinitionBo bo : krmsAttributeDefinitionBos) {

             KrmsAttributeDefinition krmsAttributeDefinition = KrmsAttributeDefinitionBo.to(bo);

             krmsAttributeDefinitions.add(krmsAttributeDefinition);

         }

         return Collections.unmodifiableList(krmsAttributeDefinitions);

     }

 }