/*
    * Copyright 2007 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.ojb;
  
  import org.apache.commons.beanutils.ConstructorUtils;
  import org.apache.log4j.Logger;
  import org.apache.ojb.broker.PersistenceBroker;
  import org.apache.ojb.broker.accesslayer.JdbcAccess;
  import org.apache.ojb.broker.metadata.ClassDescriptor;
  import org.apache.ojb.broker.metadata.FieldDescriptor;
  import org.apache.ojb.broker.util.sequence.SequenceManager;
  import org.apache.ojb.broker.util.sequence.SequenceManagerException;
  import org.kuali.rice.core.api.config.ConfigurationException;
  import org.kuali.rice.core.api.config.property.ConfigContext;
  
  
  /**
   * Overriding corresponding rice implementation that doesn't work for OLE.
   */
  public class ConfigurableSequenceManager implements SequenceManager {
      private static final Logger LOG = Logger.getLogger(ConfigurableSequenceManager.class);
      private static final String SEQUENCE_MANAGER_CLASS_NAME_PROPERTY = "datasource.ojb.sequence.manager";
      private SequenceManager sequenceManager;
  
      public ConfigurableSequenceManager(PersistenceBroker broker) {
          this.sequenceManager = createSequenceManager(broker);
      }
  
      protected SequenceManager createSequenceManager(PersistenceBroker broker) {
          String sequenceManagerClassName = ConfigContext.getCurrentContextConfig().getProperty(SEQUENCE_MANAGER_CLASS_NAME_PROPERTY);
          try {
              Object sequenceManagerObject = ConstructorUtils.invokeConstructor(Class.forName(sequenceManagerClassName), broker);
              if (!(sequenceManagerObject instanceof SequenceManager)) {
                  throw new ConfigurationException("The configured sequence manager ('" + sequenceManagerClassName + "') is not an instance of '" + SequenceManager.class.getName() + "'");
              }
              return (SequenceManager) sequenceManagerObject;
          }
          catch (Exception e) {
              String message = "Unable to configure SequenceManager specified by " + SEQUENCE_MANAGER_CLASS_NAME_PROPERTY + " KualiConfigurationService property";
              LOG.fatal(message, e);
              throw new RuntimeException(message, e);
          }
      }
  
      protected SequenceManager getConfiguredSequenceManager() {
          return this.sequenceManager;
      }
  
      @Override
      public void afterStore(JdbcAccess jdbcAccess, ClassDescriptor classDescriptor, Object object) throws SequenceManagerException {
          sequenceManager.afterStore(jdbcAccess, classDescriptor, object);
      }
  
      @Override
      public Object getUniqueValue(FieldDescriptor fieldDescriptor) throws SequenceManagerException {
          return sequenceManager.getUniqueValue(fieldDescriptor);
      }
  }