content: /*
   * 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 mf.org.apache.xerces.impl;
  
  import java.io.IOException;
  
  import mf.org.apache.xerces.xni.XNIException;
  import mf.org.apache.xerces.xni.grammars.XMLDTDDescription;
  import mf.org.apache.xerces.xni.parser.XMLEntityResolver;
  import mf.org.apache.xerces.xni.parser.XMLInputSource;
  
  /**
   * <p>This interface extends <code>XMLEntityResolver</code> providing
   * a method to resolve external subsets for documents which do not
   * explicitly provide one. The application can register an object that
   * implements this interface with the parser configuration. If registered,
   * it will be queried to locate an external subset when none is provided,
   * even for documents that do not contain DOCTYPE declarations. If the
   * registered external subset resolver does not provide an external subset
   * for a given document, it should return <code>null</code>.</p>
   *
   * @author Michael Glavassevich, IBM
   * @version $Id: ExternalSubsetResolver.java 446761 2006-09-15 21:59:29Z mrglavas $
   * @xerces.internal
   */
  public interface ExternalSubsetResolver
          extends XMLEntityResolver {
  
      //
      // ExternalSubsetResolver methods
      //
  
      /**
       * <p>Locates an external subset for documents which do not explicitly
       * provide one. If no external subset is provided, this method should
       * return <code>null</code>.</p>
       *
       * @param grammarDescription a description of the DTD
       * @throws XNIException Thrown on general error.
       * @throws IOException  Thrown if resolved entity stream cannot be
       *                      opened or some other i/o error occurs.
       */
      XMLInputSource getExternalSubset(XMLDTDDescription grammarDescription)
              throws XNIException, IOException;
  
  } // interface ExternalSubsetResolver
  