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/**
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* '$RCSfile$'
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* Purpose: class that implements the MARINE interface to the
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* metadata database.
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Chad Berkley
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*
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* '$Author: berkley $'
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* '$Date: 2000-08-23 10:20:44 -0700 (Wed, 23 Aug 2000) $'
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* '$Revision: 400 $'
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*/
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package edu.ucsb.nceas.metacat.marine;
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import java.io.*;
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import java.util.*;
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import javax.servlet.*;
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import javax.servlet.http.*;
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import java.net.*;
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import java.sql.*;
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import org.xml.sax.*;
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import org.xml.sax.helpers.*;
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import edu.ucsb.nceas.metacat.*;
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import oracle.jdbc.driver.*;
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import oracle.xml.parser.v2.*;
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import oracle.xml.parser.v2.XMLParser;
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public class marineServlet extends edu.ucsb.nceas.metacat.MetaCatServlet
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{
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MetaCatUtil util = new MetaCatUtil();
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/**
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* Transorms an xml resultset document to html and sends it to the browser
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* @param resultdoc the string representation of the document that needs
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* to be transformed.
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* @param response the HttpServletResponse object bound to the client.
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* @param out the output stream to the client
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*/
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protected void transformResultset(String resultdoc,
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HttpServletResponse response,
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PrintWriter out)
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{
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Connection conn = null;
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try
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{
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conn = util.getConnection();
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DBTransform trans = new DBTransform(conn);
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response.setContentType("text/html");
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trans.transformXMLDocument(resultdoc, "-//NCEAS//marineresultset//EN",
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"-//W3C//HTML//EN", out);
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util.returnConnection(conn);
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util.closeConnections();
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}
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catch(Exception e)
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{
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out.println("error: " + e.getMessage());
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//if (conn != null)
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{
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util.returnConnection(conn);
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util.closeConnections();
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}
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}
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}
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/**
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* Formats the text in the <query> tag so that the tag name is the name
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* of the field and the content is the query itself. This is used to
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* fill in the text boxes in the xsl created html form.
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*
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* @param param is the query parameters from the CGI
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*/
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protected String transformQuery(Hashtable params)
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{
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StringBuffer query = new StringBuffer();
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Object nextkey = null;
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Object nextelement = null;
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Enumeration elements = params.elements();
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Enumeration keys = params.keys();
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while(keys.hasMoreElements() && elements.hasMoreElements())
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{
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nextkey = keys.nextElement();
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nextelement = elements.nextElement();
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//allow for more than value per field name
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for(int i=0; i<((String[])nextelement).length; i++)
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{
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if(((String[])nextelement).length > 1)
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{ //this allows multiple values to be returned if there is more than
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//one of this field in the query.
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//(String)nextkey += String.valueOf(i);
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}
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query.append("<").append((String)nextkey).append(">");
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if(!((String[])nextelement)[i].equals(""))
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{
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query.append(((String[])nextelement)[i]);
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}
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query.append("</").append((String)nextkey).append(">");
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}
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}
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return query.toString();
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}
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}
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