package org.apache.archiva.metadata.model.facets;
   
   /*
    * 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;
  
  /**
   * @author Martin Stockhammer <martin_s@apache.org>
   */
  public abstract class AbstractMetadataFacetFactory<T extends MetadataFacet> implements MetadataFacetFactory<T>
  {
      private final String facetId;
      private final Class<T> facetClazz;
  
      protected AbstractMetadataFacetFactory( Class<T> facetClazz, String facetId) {
          this.facetId = facetId;
          this.facetClazz = facetClazz;
      }
  
      protected AbstractMetadataFacetFactory(Class<T> facetClazz ) {
          this.facetClazz = facetClazz;
          try
          {
              this.facetId = (String) this.facetClazz.getField( "FACET_ID" ).get(null);
          }
          catch ( Throwable e)
          {
              throw new RuntimeException( "There is no FACET_ID static public field on the class " + facetClazz );
          }
      }
  
      @Override
      public abstract T createMetadataFacet( );
  
      @Override
      public abstract T createMetadataFacet( String repositoryId, String name );
  
      @Override
      public Class<T> getFacetClass( )
      {
          return facetClazz;
      }
  
      @Override
      public String getFacetId( )
      {
          return facetId;
      }
  }