/*

  * 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 java.util.ArrayList;

 import java.util.Collection;

 import java.util.Collections;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import org.apache.commons.lang.StringUtils;

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

 import org.kuali.rice.krms.api.repository.action.ActionDefinition;

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

 public final class ActionBoServiceImpl implements ActionBoService {

     private BusinessObjectService businessObjectService;

         /**

          * This overridden method creates a KRMS Action in the repository

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#createAction(org.kuali.rice.krms.api.repository.action.ActionDefinition)

          */

         @Override

         public ActionDefinition createAction(ActionDefinition action) {

                 if (action == null){

                 throw new IllegalArgumentException("action is null");

                 }

                 final String actionNameKey = action.getName();

                 final String actionNamespaceKey = action.getNamespace();

                 final ActionDefinition existing = getActionByNameAndNamespace(actionNameKey, actionNamespaceKey);

                 if (existing != null){

             throw new IllegalStateException("the action to create already exists: " + action);                        

                 }        

                 ActionBo bo = ActionBo.from(action);

                 businessObjectService.save(bo);

                 return ActionBo.to(bo);

         }

         /**

          * This overridden method updates an existing Action in the repository.

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#updateAction(org.kuali.rice.krms.api.repository.action.ActionDefinition)

          */

         @Override

         public void updateAction(ActionDefinition action) {

                 if (action == null){

                 throw new IllegalArgumentException("action is null");

                 }

                 // must already exist to be able to update

                 final String actionIdKey = action.getId();

                 final ActionBo existing = businessObjectService.findBySinglePrimaryKey(ActionBo.class, actionIdKey);

         if (existing == null) {

             throw new IllegalStateException("the action does not exist: " + action);

         }

         final ActionDefinition toUpdate;

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

                         // if passed in id does not match existing id, correct it

                 final ActionDefinition.Builder builder = ActionDefinition.Builder.create(action);

                 builder.setId(existing.getId());

                 toUpdate = builder.build();

         } else {

                 toUpdate = action;

         }

                 // copy all updateable fields to bo

         ActionBo boToUpdate = ActionBo.from(toUpdate);

                 // delete any old, existing attributes

                 Map<String,String> fields = new HashMap<String,String>(1);

                 fields.put(KRMSPropertyConstants.Action.ACTION_ID, toUpdate.getId());

                 businessObjectService.deleteMatching(ActionAttributeBo.class, fields);

                 // update the action and create new attributes

         businessObjectService.save(boToUpdate);

         }

         /**

          * This overridden method retrieves an Action from the repository.

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#getActionsByActionId(java.lang.String)

          */

         @Override

         public ActionDefinition getActionByActionId(String actionId) {

                 if (StringUtils.isBlank(actionId)){

             throw new IllegalArgumentException("action ID is null or blank");                        

                 }

                 ActionBo bo = businessObjectService.findBySinglePrimaryKey(ActionBo.class, actionId);

                 return ActionBo.to(bo);

         }

         /**

          * This overridden method retrieves an Action from the repository.

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#getActionByNameAndNamespace(java.lang.String, java.lang.String)

          */

         @Override

         public ActionDefinition getActionByNameAndNamespace(String name, 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);

         ActionBo myAction = businessObjectService.findByPrimaryKey(ActionBo.class, Collections.unmodifiableMap(map));

         return ActionBo.to(myAction);

         }

         /**

          * This overridden method retrieves a List of Actions associated with a Rule.

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#getActionsByRuleId(java.lang.String)

          */

         @Override

         public List<ActionDefinition> getActionsByRuleId(String ruleId) {

                 if (StringUtils.isBlank(ruleId)){

             throw new IllegalArgumentException("ruleId is null or blank");                        

                 }

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

         map.put("ruleId", ruleId);

                 List<ActionBo> bos = (List<ActionBo>) businessObjectService.findMatchingOrderBy(ActionBo.class, map, "sequenceNumber", true);

                 return convertListOfBosToImmutables(bos);

         }

         /**

          * This overridden method retrieves a specific Action associated with a Rule.

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#getActionByRuleIdAndSequenceNumber(java.lang.String, java.lang.Integer)

          */

         @Override

         public ActionDefinition getActionByRuleIdAndSequenceNumber(String ruleId, Integer sequenceNumber) {

                 if (StringUtils.isBlank(ruleId)) {

             throw new IllegalArgumentException("ruleId is null or blank");

                 }

                 if (sequenceNumber == null) {

             throw new IllegalArgumentException("sequenceNumber is null");

                 }

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

         map.put("ruleId", ruleId);

         map.put("sequenceNumber", sequenceNumber);

                 ActionBo bo = businessObjectService.findByPrimaryKey(ActionBo.class, map);

                 return ActionBo.to(bo);

         }

         /**

          * This method retrieves an ActionAttributeBo by id

          * 

          * @see org.kuali.rice.krms.impl.repository.ActionBoService#getActionsByRuleId(java.lang.String)

          */

         public ActionAttributeBo getActionAttributeById(String attrId) {

                 if (StringUtils.isBlank(attrId)){

             return null;                        

                 }

                 ActionAttributeBo bo = businessObjectService.findBySinglePrimaryKey(ActionAttributeBo.class, attrId);

                 return bo;

         }

     /**

      * Sets the businessObjectService attribute value.

      *

      * @param businessObjectService The businessObjectService to set.

      */

     public void setBusinessObjectService(final BusinessObjectService businessObjectService) {

         this.businessObjectService = businessObjectService;

     }

     /**

      * Converts a List<ActionBo> to an Unmodifiable List<Action>

      *

      * @param ActionBos a mutable List<ActionBo> to made completely immutable.

      * @return An unmodifiable List<Action>

      */

     List<ActionDefinition> convertListOfBosToImmutables(final Collection<ActionBo> actionBos) {

             if (actionBos == null) return Collections.emptyList();

         ArrayList<ActionDefinition> actions = new ArrayList<ActionDefinition>();

         for (ActionBo bo : actionBos) {

             ActionDefinition action = ActionBo.to(bo);

             actions.add(action);

         }

         return Collections.unmodifiableList(actions);

     }

 }