Metacat

  /**

   * format a structured query as an XML document that conforms

   * to the pathquery.dtd and is appropriate for submission to the DBQuery

   * structured query engine

   *

   * @param params The list of parameters that  should be included in the query

   * @param doctype the type of documents to include in the result set -- use

   *        "any" or "ANY" for unfiltered result sets

   */

  public static String createSQuery(Hashtable params, String doctype)

  {

    StringBuffer query=null;

    Enumeration elements;

    Enumeration keys;

    Object nextkey;

    Object nextelement;

    query.append("<?xml version=\"1.0\"?>");

    query.append("<pathquery version=\"1.0\"><meta_file_id>");

    if(params.containsKey("meta_file_id"))

    {

      query.append( ((String[])params.get("meta_file_id"))[0]);

    	query.append("</meta_file_id>");

    }

    else

    {

      query.append("unspecified</meta_file_id>");

    }

    query.append("<querytitle>");

    if(params.containsKey("querytitle"))

    {

      query.append(((String[])params.get("querytitle"))[0]);

    	query.append("</querytitle>");

    }

    else

    {

    	query.append("unspecified</querytitle>");

    }

    if (!doctype.equals("any") && 

        !doctype.equals("ANY") &&

        !doctype.equals("") ) 

    {

       query.append("<returndoctype>");

       query.append(doctype).append("</returndoctype>");

    }

    query.append("<querygroup operator=\"" + 

    		        ((String[])params.get("operator"))[0] + "\">");

    //anyfield is a special case because it does a 

    //free text search.  It does not have a <pathexpr>

    //tag.

    if(params.containsKey("anyfield") && 

    	 !((String[])params.get("anyfield"))[0].equals(""))

    {

    	query.append("<queryterm casesensitive=\"false\" " +

    			         "searchmode=\"contains\"><value>" +

    			         ((String[])params.get("anyfield"))[0] +

    			         "</value></queryterm>");

    }

    //this while loop finds the rest of the parameters

    //and attempts to query for the field specified

    //by the parameter.

    elements = params.elements();

    keys = params.keys();

    while(keys.hasMoreElements() && elements.hasMoreElements())

    {

      nextkey = keys.nextElement();

    	nextelement = elements.nextElement();

    	//make sure we aren't querying for any of these

    	//parameters since the are already in the query

      //in one form or another.

    	if(!nextkey.toString().equals("doctype") && 

    		 !nextkey.toString().equals("action")  &&

    		 !nextkey.toString().equals("qformat") && 

    		 !nextkey.toString().equals("anyfield") &&

    		 !nextkey.toString().equals("operator") &&

    		 !(((String[])nextelement)[0].equals("")) )

    	{

        query.append("<queryterm casesensitive=\"false\" " + 

    				         "searchmode=\"contains\">" +

    		             "<value>" +

        //add the query value

    		             ((String[])nextelement)[0] +

    		             "</value><pathexpr>" +

    		//add the path to query by 

                     nextkey.toString() + 

                     "</pathexpr></queryterm>");

    	}

    }

    query.append("</querygroup></pathquery>");

    return query.toString();

  }

 * 'Revision 1.10  2000/07/26 20:40:41  higgins

 * 'no message

 * '