/**
    * Copyright 2005-2014 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.dao.jdbc;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.ojb.broker.PBKey;
  import org.apache.ojb.broker.PersistenceBroker;
  import org.kuali.rice.core.api.config.ConfigurationException;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  import org.kuali.rice.core.framework.persistence.jdbc.dao.PlatformAwareDaoBaseJdbc;
  import org.kuali.rice.krad.bo.ModuleConfiguration;
  import org.kuali.rice.krad.dao.SequenceAccessorDao;
  import org.kuali.rice.krad.data.platform.MaxValueIncrementerFactory;
  import org.kuali.rice.krad.service.KRADServiceLocator;
  import org.kuali.rice.krad.service.KRADServiceLocatorWeb;
  import org.kuali.rice.krad.service.KualiModuleService;
  import org.kuali.rice.krad.service.ModuleService;
  import org.kuali.rice.krad.util.KRADConstants;
  import org.kuali.rice.krad.util.LegacyUtils;
  import org.springmodules.orm.ojb.OjbFactoryUtils;
  
  import javax.sql.DataSource;
  
  /**
   * This class uses the KualiDBPlatform to get the next number from a given sequence.
   */
  @Deprecated
  public class SequenceAccessorDaoJdbc extends PlatformAwareDaoBaseJdbc implements SequenceAccessorDao {
  	private KualiModuleService kualiModuleService;
  
  	private Long nextAvailableSequenceNumber(String sequenceName, Class clazz) {
          ModuleService moduleService = getKualiModuleService().getResponsibleModuleService(clazz);
          if ( moduleService == null )
          	throw new ConfigurationException("moduleService is null");
          	        	
          ModuleConfiguration moduleConfig = moduleService.getModuleConfiguration();
          if ( moduleConfig == null )
          	throw new ConfigurationException("moduleConfiguration is null");
  
          String dataSourceName = moduleConfig.getDataSourceName();
  
          if (StringUtils.isEmpty(dataSourceName)) {
              return nextAvailableSequenceNumber(sequenceName);
          } else {
              PBKey key = new PBKey(dataSourceName);
              PersistenceBroker broker = OjbFactoryUtils.getPersistenceBroker(key, false);
  
              if (broker != null) {
                  return getDbPlatform().getNextValSQL(sequenceName, broker);
              } else {
                  throw new ConfigurationException("PersistenceBroker is null");
              }
          }
  	}
  
      private Long nextAvailableSequenceNumber(String sequenceName) {
          DataSource dataSource = (DataSource) ConfigContext.getCurrentContextConfig().getObject(KRADConstants.KRAD_APPLICATION_DATASOURCE);
          if (dataSource == null) {
              dataSource = KRADServiceLocator.getKradApplicationDataSource();
          }
          return Long.valueOf(MaxValueIncrementerFactory.getIncrementer(dataSource, sequenceName).nextLongValue());
      }
  	
  	public Long getNextAvailableSequenceNumber(String sequenceName, Class clazz) {
          if (!LegacyUtils.useLegacy(clazz)) {
              throw new ConfigurationException("SequenceAccessorService should not be used with new data framework! Use "
                      + MaxValueIncrementerFactory.class.getName() + " instead.");
          }
  
  		// There are situations where a module hasn't been configured with
  		// a dataSource.  In these cases, this method would have previously
  		// thrown an error.  Instead, we've opted to factor out the code,
  		// catch any configuration-related exceptions, and if one occurs,
  		// attempt to use the dataSource associated with KNS. -- tbradford
  		
  		try {
  			return nextAvailableSequenceNumber(sequenceName, clazz);
  		}
  		catch ( ConfigurationException e  ) {
  	    	// Use kradApplication.datasource to get the dataSource associated with KNS
  			return nextAvailableSequenceNumber(sequenceName);
  		}
  	}
  	
      /**
       * @see org.kuali.rice.krad.dao.SequenceAccessorDao#getNextAvailableSequenceNumber(java.lang.String)
      */
     public Long getNextAvailableSequenceNumber(String sequenceName) {
     	// Use kradApplication.datasource to get the dataSource associated with KNS
     	return nextAvailableSequenceNumber(sequenceName);
     }
     
     private KualiModuleService getKualiModuleService() {
         if ( kualiModuleService == null ) 
             kualiModuleService = KRADServiceLocatorWeb.getKualiModuleService();
         return kualiModuleService;
     }
 }