public String getDescription() 
{
    return "Lucene Index Browser.  Inspired and modeled after Luke: http://www.getopt.org/luke/";
}

 public URL[] getDocs() 
{
    try {
      return new URL[] { new URL("http://wiki.apache.org/solr/LukeRequestHandler") };
    }
    catch( MalformedURLException ex ) { return null; }
}

 public String getSource() 
{
    return "$URL: https://svn.apache.org/repos/asf/lucene/solr/branches/branch-1.2/src/java/org/apache/solr/handler/admin/LukeRequestHandler.java $";
}

 public String getSourceId() 
{
    return "$Id: LukeRequestHandler.java 542679 2007-05-29 22:28:21Z ryan $";
}

 public String getVersion() 
{
    return "$Revision: 542679 $";
}

 public  void handleRequestBody(SolrQueryRequest req,
    SolrQueryResponse rsp) throws Exception 
{
  
    RequestHandlerUtils.addExperimentalFormatWarning( rsp );
    IndexSchema schema = req.getSchema();
    SolrIndexSearcher searcher = req.getSearcher();
    IndexReader reader = searcher.getReader();
    SolrParams params = req.getParams();
    int numTerms = params.getInt( NUMTERMS, DEFAULT_COUNT );
    // Always show the core lucene info
    rsp.add("index", getIndexInfo(reader, numTerms >0 ) );
    Integer docId = params.getInt( DOC_ID );
    if( docId == null && params.get( ID ) != null ) {
      // Look for something with a given solr ID
      SchemaField uniqueKey = schema.getUniqueKeyField();
      String v = uniqueKey.getType().toInternal( params.get(ID) );
      Term t = new Term( uniqueKey.getName(), v );
      docId = searcher.getFirstMatch( t );
      if( docId <  0 ) {
        throw new SolrException( SolrException.ErrorCode.NOT_FOUND, "Can't find document: "+params.get( ID ) );
      }
    }
    // Read the document from the index
    if( docId != null ) {
      Document doc = null;
      try {
        doc = reader.document( docId );
      }
      catch( Exception ex ) {}
      if( doc == null ) {
        throw new SolrException( SolrException.ErrorCode.NOT_FOUND, "Can't find document: "+docId );
      }
      SimpleOrderedMap< Object > info = getDocumentFieldsInfo( doc, docId, reader, schema );
      SimpleOrderedMap< Object > docinfo = new SimpleOrderedMap< Object >();
      docinfo.add( "docId", docId );
      docinfo.add( "lucene", info );
      docinfo.add( "solr", doc );
      rsp.add( "doc", docinfo );
    }
    else {
      // If no doc is given, show all fields and top terms
      Set< String > fields = null;
      if( params.get( SolrParams.FL ) != null ) {
        fields = new HashSet< String >();
        for( String f : params.getParams( SolrParams.FL ) ) {
          fields.add( f );
        }
      }
      rsp.add( "fields", getIndexedFieldsInfo( searcher, fields, numTerms ) ) ;
    }
    // Add some generally helpful information
    NamedList< Object > info = new SimpleOrderedMap< Object >();
    info.add( "key", getFieldFlagsKey() );
    info.add( "NOTE", "Document Frequency (df) is not updated when a document is marked for deletion.  df values include deleted documents." ); 
    rsp.add( "info", info );
}