/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache 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.apache.org/licenses/LICENSE-2.0
   *
   * 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.apache.chemistry.opencmis.client.bindings.impl;
  
  import static org.apache.chemistry.opencmis.commons.impl.CollectionsHelper.isNotEmpty;
  
  import java.io.Serializable;
  import java.math.BigInteger;
  import java.util.List;
  
  import org.apache.chemistry.opencmis.client.bindings.cache.TypeDefinitionCache;
  import org.apache.chemistry.opencmis.client.bindings.spi.BindingSession;
  import org.apache.chemistry.opencmis.client.bindings.spi.CmisSpi;
  import org.apache.chemistry.opencmis.commons.data.ExtensionsData;
  import org.apache.chemistry.opencmis.commons.data.RepositoryInfo;
  import org.apache.chemistry.opencmis.commons.definitions.TypeDefinition;
  import org.apache.chemistry.opencmis.commons.definitions.TypeDefinitionContainer;
  import org.apache.chemistry.opencmis.commons.definitions.TypeDefinitionList;
  import org.apache.chemistry.opencmis.commons.spi.ExtendedRepositoryService;
  import org.apache.chemistry.opencmis.commons.spi.RepositoryService;
  
  /**
   * Repository Service implementation.
   * 
   * Passes requests to the SPI and handles caching.
   */
  public class RepositoryServiceImpl implements RepositoryService, ExtendedRepositoryService, Serializable {
  
      private static final long serialVersionUID = 1L;
  
      private final BindingSession session;
  
      /**
       * Constructor.
       */
      public RepositoryServiceImpl(BindingSession session) {
          assert session != null;
  
          this.session = session;
      }
  
      @Override
      public RepositoryInfo getRepositoryInfo(String repositoryId, ExtensionsData extension) {
          RepositoryInfo result = null;
          boolean hasExtension = (extension != null) && isNotEmpty(extension.getExtensions());
  
          RepositoryInfoCache cache = CmisBindingsHelper.getRepositoryInfoCache(session);
  
          // if extension is not set, check the cache first
          if (!hasExtension) {
              result = cache.get(repositoryId);
              if (result != null) {
                  return result;
              }
          }
  
          // it was not in the cache -> get the SPI and fetch the repository info
          CmisSpi spi = CmisBindingsHelper.getSPI(session);
          result = spi.getRepositoryService().getRepositoryInfo(repositoryId, extension);
  
          // put it into the cache
          if (!hasExtension) {
              cache.put(result);
          }
  
          return result;
      }
  
      @Override
      public List<RepositoryInfo> getRepositoryInfos(ExtensionsData extension) {
          List<RepositoryInfo> result = null;
          boolean hasExtension = (extension != null) && isNotEmpty(extension.getExtensions());
  
          // get the SPI and fetch the repository infos
          CmisSpi spi = CmisBindingsHelper.getSPI(session);
          result = spi.getRepositoryService().getRepositoryInfos(extension);
  
          // put it into the cache
          if (!hasExtension && (result != null)) {
              RepositoryInfoCache cache = CmisBindingsHelper.getRepositoryInfoCache(session);
              for (RepositoryInfo rid : result) {
                  cache.put(rid);
              }
         }
 
         return result;
     }
 
     @Override
     public TypeDefinitionList getTypeChildren(String repositoryId, String typeId, Boolean includePropertyDefinitions,
             BigInteger maxItems, BigInteger skipCount, ExtensionsData extension) {
         TypeDefinitionList result = null;
         boolean hasExtension = (extension != null) && isNotEmpty(extension.getExtensions());
         boolean propDefs = (includePropertyDefinitions == null ? false : includePropertyDefinitions.booleanValue());
 
         // get the SPI and fetch the type definitions
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         result = spi.getRepositoryService().getTypeChildren(repositoryId, typeId, includePropertyDefinitions, maxItems,
                 skipCount, extension);
 
         // put it into the cache
         if (!hasExtension && propDefs && (result != null)) {
             TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
 
             for (TypeDefinition tdd : result.getList()) {
                 cache.put(repositoryId, tdd);
             }
         }
 
         return result;
     }
 
     @Override
     public TypeDefinition getTypeDefinition(String repositoryId, String typeId, ExtensionsData extension) {
         return getTypeDefinition(repositoryId, typeId, extension, true);
     }
 
     @Override
     public TypeDefinition getTypeDefinition(String repositoryId, String typeId, ExtensionsData extension,
             boolean useCache) {
         TypeDefinition result = null;
         boolean hasExtension = (extension != null) && isNotEmpty(extension.getExtensions());
 
         TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
 
         // if the cache should be used and the extension is not set,
         // check the cache first
         if (useCache && !hasExtension) {
             result = cache.get(repositoryId, typeId);
             if (result != null) {
                 return result;
             }
         }
 
         // it was not in the cache -> get the SPI and fetch the type definition
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         result = spi.getRepositoryService().getTypeDefinition(repositoryId, typeId, extension);
 
         // put it into the cache
         if (!hasExtension && (result != null)) {
             cache.put(repositoryId, result);
         }
 
         return result;
     }
 
     @Override
     public List<TypeDefinitionContainer> getTypeDescendants(String repositoryId, String typeId, BigInteger depth,
             Boolean includePropertyDefinitions, ExtensionsData extension) {
         List<TypeDefinitionContainer> result = null;
         boolean hasExtension = (extension != null) && isNotEmpty(extension.getExtensions());
         boolean propDefs = includePropertyDefinitions == null ? false : includePropertyDefinitions.booleanValue();
 
         // get the SPI and fetch the type definitions
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         result = spi.getRepositoryService().getTypeDescendants(repositoryId, typeId, depth, includePropertyDefinitions,
                 extension);
 
         // put it into the cache
         if (!hasExtension && propDefs && (result != null)) {
             TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
             addToTypeCache(cache, repositoryId, result);
         }
 
         return result;
     }
 
     private void addToTypeCache(TypeDefinitionCache cache, String repositoryId, List<TypeDefinitionContainer> containers) {
         if (containers == null) {
             return;
         }
 
         for (TypeDefinitionContainer container : containers) {
             cache.put(repositoryId, container.getTypeDefinition());
             addToTypeCache(cache, repositoryId, container.getChildren());
         }
     }
 
     @Override
     public TypeDefinition createType(String repositoryId, TypeDefinition type, ExtensionsData extension) {
         // get the SPI and create the type definitions
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         TypeDefinition result = spi.getRepositoryService().createType(repositoryId, type, extension);
 
         // add the type to cache
         TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
         cache.put(repositoryId, result);
 
         return result;
     }
 
     @Override
     public TypeDefinition updateType(String repositoryId, TypeDefinition type, ExtensionsData extension) {
         // get the SPI and update the type definitions
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         TypeDefinition result = spi.getRepositoryService().updateType(repositoryId, type, extension);
 
         // update the type in cache
         TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
         cache.put(repositoryId, result);
 
         return result;
     }
 
     @Override
     public void deleteType(String repositoryId, String typeId, ExtensionsData extension) {
         // get the SPI and delete the type definitions
         CmisSpi spi = CmisBindingsHelper.getSPI(session);
         spi.getRepositoryService().deleteType(repositoryId, typeId, extension);
 
         // remove the type from cache
         TypeDefinitionCache cache = CmisBindingsHelper.getTypeDefinitionCache(session);
         cache.remove(repositoryId, typeId);
     }
 
 }