/*
    * Copyright 2011 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 1.0 (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/ecl1.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.student.r2.common.datadictionary;
  
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.LinkedHashMap;
  import java.util.List;
  import java.util.Map;
  import org.kuali.rice.krad.datadictionary.DataObjectEntry;
  import org.kuali.student.r2.common.constants.CommonServiceConstants;
  import org.kuali.student.r2.common.datadictionary.dto.DictionaryEntryInfo;
  import org.kuali.student.r2.common.datadictionary.service.DataDictionaryService;
  import org.kuali.student.r2.common.dto.ContextInfo;
  import org.kuali.student.r2.common.exceptions.DoesNotExistException;
  import org.kuali.student.r2.common.exceptions.MissingParameterException;
  import org.kuali.student.r2.common.exceptions.OperationFailedException;
  import org.kuali.student.r2.common.exceptions.PermissionDeniedException;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.context.support.ClassPathXmlApplicationContext;
  
  /**
   * Dictionary Service implementation that reads the dictionary from the spring beans and feeds
   * both the Student dictionary and the RICE dictionary
   *
   * @author nwright
   */
  public class DataDictionaryServiceImpl implements DataDictionaryService, RiceDataDictionaryServiceInfc {
  
      private static org.apache.log4j.Logger log = org.apache.log4j.Logger.getLogger(DataDictionaryServiceImpl.class);
      private String serviceNamespaceSuffix;
      private Map<String, DictionaryEntryInfo> studMap;
      private Map<String, DataObjectEntry> riceMap;
  
      public DataDictionaryServiceImpl() {
      }
  
      public String getServiceNamespaceSuffix() {
          return serviceNamespaceSuffix;
      }
  
      public void setServiceNamespaceSuffix(String serviceNamespaceSuffix) {
          this.serviceNamespaceSuffix = serviceNamespaceSuffix;
      }
  
  
      public void setDictionaryLocations(List<String> locations) throws IOException {
          studMap = new LinkedHashMap<String, DictionaryEntryInfo>();
          riceMap = new LinkedHashMap<String, DataObjectEntry>();
          ConfigurableApplicationContext ac = new ClassPathXmlApplicationContext(locations.toArray(new String[locations.size()]));
          Map<String, DataObjectEntry> beansOfType = ac.getBeansOfType(DataObjectEntry.class);
          ac.close();
          for (DataObjectEntry entry : beansOfType.values()) {
              log.debug(entry.getDataObjectClass());
              riceMap.put(entry.getFullClassName(), entry);
              studMap.put(calcRefObjectURI (entry.getDataObjectClass()), new Rice2StudentDictionaryEntryConverter().convert(entry));
          }
      }
  
      private String calcRefObjectURI (Class<?> objectClass) {
       return CommonServiceConstants.REF_OBJECT_URI_GLOBAL_PREFIX + this.serviceNamespaceSuffix + "/" + objectClass.getSimpleName();
      }
  
      @Override
      public DictionaryEntryInfo getDataDictionaryEntry(String entryKey, ContextInfo context)
              throws OperationFailedException,
              MissingParameterException,
              PermissionDeniedException,
              DoesNotExistException {
          DictionaryEntryInfo entry = studMap.get(entryKey);
          if (entry == null) {
              throw new DoesNotExistException(entryKey);
          }
          return entry;
      }
  
      @Override
      public List<String> getDataDictionaryEntryKeys(ContextInfo context)
              throws OperationFailedException,
              MissingParameterException,
              PermissionDeniedException {
          return new ArrayList(studMap.keySet());
      }
  
      @Override
      public DataObjectEntry getDataObjectEntry(String entryKey) {
         return riceMap.get(entryKey);
     }
 }