package org.apache.archiva.metadata.repository;
   
   /*
    * 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.
   */
  
  import org.apache.archiva.metadata.model.MetadataFacet;
  import org.apache.archiva.metadata.model.MetadataFacetFactory;
  import org.springframework.context.ApplicationContext;
  import org.springframework.stereotype.Service;
  
  import javax.inject.Inject;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  /**
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  
  @SuppressWarnings( "SpringJavaInjectionPointsAutowiringInspection" )
  @Service("metadataService")
  public class MetadataService
  {
  
      private Map<String, MetadataFacetFactory<? extends MetadataFacet>> facetFactories = new HashMap<>( );
      private Map<Class<? extends MetadataFacet>, MetadataFacetFactory<? extends MetadataFacet>> facetFactoriesByClass = new HashMap<>( );
      private Map<String, Class<? extends MetadataFacet>> reverseFactoryMap = new HashMap<>( );
  
      private MetadataResolver metadataResolver = null;
  
      @Inject
      ApplicationContext applicationContext;
  
  
      @Inject
      public void setMetadataFacetFactories( List<MetadataFacetFactory> factoryList ) {
          Map<String, MetadataFacetFactory<? extends MetadataFacet>> facetFactories = new HashMap<>( );
          Map<Class<? extends MetadataFacet>, MetadataFacetFactory<? extends MetadataFacet>> facetFactoriesByClass = new HashMap<>( );
          Map<String, Class<? extends MetadataFacet>> reverseFactoryMap = new HashMap<>( );
          for (MetadataFacetFactory factory : factoryList) {
              facetFactories.put( factory.getFacetId( ), factory );
              facetFactoriesByClass.put( factory.getFacetClass( ), factory );
              reverseFactoryMap.put( factory.getFacetId( ), factory.getFacetClass( ) );
          }
          this.facetFactories = facetFactories;
          this.facetFactoriesByClass = facetFactoriesByClass;
          this.reverseFactoryMap = reverseFactoryMap;
      }
  
      public <T extends MetadataFacet> MetadataFacetFactory<T> getFactory(Class<T> facetClazz) {
          return (MetadataFacetFactory<T>) facetFactoriesByClass.get( facetClazz );
      }
  
      public MetadataFacetFactory<?> getFactory(String facetId) {
          return facetFactories.get( facetId );
      }
  
      public Set<String> getSupportedFacets() {
          return facetFactories.keySet( );
      }
  
      public boolean supportsFacet(Class<? extends MetadataFacet> facetClazz) {
          return facetFactoriesByClass.containsKey( facetClazz );
      }
  
      public boolean supportsFacet(String facetId) {
          return facetFactories.containsKey( facetId );
      }
  
      public Class<? extends MetadataFacet> getFactoryClassForId( String facetId ) {
          return reverseFactoryMap.get( facetId );
      }
  
      // Lazy evaluation to avoid problems with circular dependencies during initialization
      public MetadataResolver getMetadataResolver()
      {
          if ( this.metadataResolver == null && applicationContext!=null)
          {
              this.metadataResolver = applicationContext.getBean( MetadataResolver.class );
          }
          return this.metadataResolver;
      }
 }