/**
    * Copyright 2005-2012 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.util;
  
  import org.apache.log4j.Logger;
  import org.apache.ojb.broker.metadata.ConnectionRepository;
  import org.apache.ojb.broker.metadata.DescriptorRepository;
  import org.apache.ojb.broker.metadata.MetadataManager;
  import org.kuali.rice.core.api.util.ClassLoaderUtils;
  import org.springframework.beans.factory.InitializingBean;
  import org.springframework.core.io.DefaultResourceLoader;
  
  import java.io.InputStream;
  import java.util.ArrayList;
  import java.util.List;
  
  public class OjbMetadataLoader implements InitializingBean {
      
      private static final Logger LOG = Logger.getLogger(OjbMetadataLoader.class);
  
      private List<String> repositoryDescriptors = new ArrayList<String>();
      private List<String> connectionDescriptors = new ArrayList<String>(); 
      
      public List<String> getConnectionDescriptors() {
          return connectionDescriptors;
      }
  
      public void setConnectionDescriptors(List<String> connectionDescriptors) {
          this.connectionDescriptors = connectionDescriptors;
      }
  
      public List<String> getRepositoryDescriptors() {
          return repositoryDescriptors;
      }
  
      public void setRepositoryDescriptors(List<String> repositoryDescriptors) {
          this.repositoryDescriptors = repositoryDescriptors;
      }
  
      public void afterPropertiesSet() throws Exception {
          
          MetadataManager mm = MetadataManager.getInstance();
          DefaultResourceLoader resourceLoader = new DefaultResourceLoader(ClassLoaderUtils.getDefaultClassLoader());
          
          for (String repositoryDescriptor : repositoryDescriptors) {
              InputStream is = resourceLoader.getResource(repositoryDescriptor).getInputStream();
              DescriptorRepository dr = mm.readDescriptorRepository(is);
              mm.mergeDescriptorRepository(dr);
              if (LOG.isDebugEnabled()) {
                  LOG.debug("--------------------------------------------------------------------------");
                  LOG.debug("Merging repository descriptor: " + repositoryDescriptor);
                  LOG.debug("--------------------------------------------------------------------------");
              }
              try {
                  is.close();
              } catch (Exception e) {
                  LOG.warn("Failed to close stream to file " + repositoryDescriptor, e);
              }
          }
          
          for (String connectionDesciptor : connectionDescriptors) {
              InputStream is = resourceLoader.getResource(connectionDesciptor).getInputStream();
              ConnectionRepository cr = mm.readConnectionRepository(is);
              mm.mergeConnectionRepository(cr);
              if (LOG.isDebugEnabled()) {
                  LOG.debug("--------------------------------------------------------------------------");
                  LOG.debug("Merging connection descriptor: " + connectionDesciptor);
                  LOG.debug("--------------------------------------------------------------------------");
              }
              try {
                  is.close();
              } catch (Exception e) {
                  LOG.warn("Failed to close stream to file " + connectionDesciptor, e);
              }
          }
          
      }
  
  }