/**
    * Copyright 2005-2015 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.data.metadata.impl;
  
  import java.util.HashMap;
  import java.util.Map;
  
  import org.kuali.rice.krad.data.metadata.DataObjectMetadata;
  import org.kuali.rice.krad.data.metadata.MetadataRepository;
  import org.kuali.rice.krad.data.provider.MetadataProvider;
  import org.kuali.rice.krad.data.provider.ProviderRegistry;
  import org.springframework.beans.factory.annotation.Required;
  
  /**
   * MetadataRepository implementation backed by the ProviderRegistry
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public class MetadataRepositoryImpl implements MetadataRepository {
  
      private ProviderRegistry registry;
  
      @Required
      public void setProviderRegistry(ProviderRegistry registry) {
          this.registry = registry;
      }
  
      @Override
  	public synchronized DataObjectMetadata getMetadata(Class<?> type) {
          // don't compose, just return first provider result
          for (MetadataProvider provider: registry.getMetadataProviders()) {
              if (provider.handles(type)) {
                  return provider.getMetadataForType(type);
              }
          }
          return null;
      }
  
      @Override
  	public Map<Class<?>, DataObjectMetadata> getAllMetadata() {
  		Map<Class<?>, DataObjectMetadata> allMetaData = new HashMap<Class<?>, DataObjectMetadata>();
          // accumulate all metadata
          // subsequent mappings for given data object type override previous mappings
          // so provider order matters - last one wins
          for (MetadataProvider provider: registry.getMetadataProviders()) {
              allMetaData.putAll(provider.provideMetadata());
          }
          return allMetaData;
      }
  
      @Override
      public boolean contains(Class<?> type) {
          return getMetadata(type) != null;
      }
  
  }