/*

  * 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.krad.service.impl;

 import org.apache.commons.lang.StringUtils;

 import org.kuali.rice.core.api.config.property.ConfigurationService;

 import org.kuali.rice.core.api.search.SearchOperator;

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

 import org.kuali.rice.krad.dao.LookupDao;

 import org.kuali.rice.krad.service.LookupService;

 import java.util.Collection;

 import java.util.Iterator;

 import java.util.List;

 import java.util.Map;

 /**

  * Service implementation for the Lookup structure. It Provides a generic search

  * mechanism against Business Objects. This is the default implementation, that

  * is delivered with Kuali.

  * 

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public class LookupServiceImpl implements LookupService {

     private static final org.apache.log4j.Logger LOG = org.apache.log4j.Logger.getLogger(LookupServiceImpl.class);

     private LookupDao lookupDao;

     private ConfigurationService kualiConfigurationService;

     public <T extends Object> Collection<T> findCollectionBySearchUnbounded(Class<T> example,

             Map<String, String> formProps) {

         return findCollectionBySearchHelper(example, formProps, true);

     }

     /**

      * Returns a collection of objects based on the given search parameters.

      * 

      * @return Collection returned from the search

      */

     public <T extends Object> Collection<T> findCollectionBySearch(Class<T> example, Map<String, String> formProps) {

         return findCollectionBySearchHelper(example, formProps, false);

     }

     public <T extends Object> Collection<T> findCollectionBySearchHelper(Class<T> example,

             Map<String, String> formProps, boolean unbounded) {

         return lookupDao.findCollectionBySearchHelper(example, formProps, unbounded,

                 allPrimaryKeyValuesPresentAndNotWildcard(example, formProps));

     }

     /**

      * Retrieves a Object based on the search criteria, which should uniquely

      * identify a record.

      * 

      * @return Object returned from the search

      */

     public <T extends Object> T findObjectBySearch(Class<T> example, Map<String, String> formProps) {

         if (example == null || formProps == null) {

             throw new IllegalArgumentException("Object and Map must not be null");

         }

         T obj = null;

         try {

             obj = example.newInstance();

         } catch (IllegalAccessException e) {

             throw new RuntimeException("Cannot get new instance of " + example.getName(), e);

         } catch (InstantiationException e) {

             throw new RuntimeException("Cannot instantiate " + example.getName(), e);

         }

         return lookupDao.findObjectByMap(obj, formProps);

     }

     public boolean allPrimaryKeyValuesPresentAndNotWildcard(Class<?> boClass, Map<String, String> formProps) {

         List<String> pkFields = KNSServiceLocator.getBusinessObjectMetaDataService().listPrimaryKeyFieldNames(

                 boClass);

         Iterator<String> pkIter = pkFields.iterator();

         boolean returnVal = true;

         while (returnVal && pkIter.hasNext()) {

             String pkName = pkIter.next();

             String pkValue = formProps.get(pkName);

             if (StringUtils.isBlank(pkValue)) {

                 returnVal = false;

             } else {

                 for (SearchOperator op : SearchOperator.QUERY_CHARACTERS) {

                     if (pkValue.contains(op.op())) {

                         returnVal = false;

                         break;

                     }

                 }

             }

         }

         return returnVal;

     }

     /**

      * @return Returns the lookupDao.

      */

     public LookupDao getLookupDao() {

         return lookupDao;

     }

     /**

      * @param lookupDao The lookupDao to set.

      */

     public void setLookupDao(LookupDao lookupDao) {

         this.lookupDao = lookupDao;

     }

     public ConfigurationService getKualiConfigurationService() {

         return kualiConfigurationService;

     }

     public void setKualiConfigurationService(ConfigurationService kualiConfigurationService) {

         this.kualiConfigurationService = kualiConfigurationService;

     }

 }