Revision 361
Added by berkley over 24 years ago
| src/edu/ucsb/nceas/metacat/MetaCatServlet.java | ||
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* Purpose: A Class that implements a metadata catalog as a java Servlet |
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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: Matt Jones, Dan Higgins, Jivka Bojilova |
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* Authors: Matt Jones, Dan Higgins, Jivka Bojilova, Chad Berkley
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* Release: @release@ |
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* |
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* '$Author$' |
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import java.sql.ResultSet; |
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import java.sql.Connection; |
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import java.sql.SQLException; |
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import java.lang.reflect.*; |
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import javax.servlet.ServletConfig; |
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import javax.servlet.ServletContext; |
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out.println("</success>");
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return; |
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} |
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response.sendRedirect(htmlpath + "/index.html"); |
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// aware of session expiration on every request |
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} else {
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HttpSession sess = request.getSession(true); |
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// session expired or has not been stored b/w user requests |
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// redirect to default page for query only access |
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// response.sendRedirect(htmlpath + "/sexpire.html"); |
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} |
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} |
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// End of Jivka added |
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if (action.equals("query") || action.equals("squery")) {
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handleQueryAction(out, params, response); |
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} else if (action.equals("getdocument")) {
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try |
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{
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Class[] x = {Class.forName("PrintWriter"),
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Class.forName("Hashtable"),
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Class.forName("HttpServletResponse")};
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Class c = Class.forName("edu.ucsb.nceas.metacat.MetaCatServlet");
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Method m = c.getDeclaredMethod("handleQueryAction", x);
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} |
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catch(Exception e) |
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{
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} |
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if(action.equals("query"))
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{
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handleQuery(out, params, response); |
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} |
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else if(action.equals("squery"))
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{
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handleSQuery(out, params, response); |
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} |
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else if (action.equals("getdocument")) {
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try {
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handleGetDocumentAction(out, params, response); |
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} catch (ClassNotFoundException e) {
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* @param params is the Hashtable of parameters that should be included |
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* in the squery. |
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*/ |
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private String handleSQuery(Hashtable params) |
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private void handleSQuery(PrintWriter out, Hashtable params, |
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HttpServletResponse response) |
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{
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//create the squery and return it to be processed |
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String doctype = null; |
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{
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doctype="ANY"; |
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} |
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return DBQuery.createSQuery(params, doctype); |
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String xmlquery = DBQuery .createSQuery(params, doctype); |
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Hashtable doclist = runQuery(xmlquery); |
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String qformat = ((String[])params.get("qformat"))[0];
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transformDocument(doclist, qformat, xmlquery, out, response); |
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} |
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/** |
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* @param doctype is the doctype parameter returned through the CGI. |
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* If no doctype filter is required, set it to null or "". |
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*/ |
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private String handleQuery(Hashtable params) |
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private void handleQuery(PrintWriter out, Hashtable params, |
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HttpServletResponse response) |
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{
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String doctype=null; |
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String[] doctypeArr=null; |
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{
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doctype="ANY"; |
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} |
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return DBQuery.createQuery(query,doctype); |
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String xmlquery = DBQuery.createQuery(query, doctype); |
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Hashtable doclist = runQuery(xmlquery); |
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String qformat = ((String[])params.get("qformat"))[0];
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transformDocument(doclist, qformat, xmlquery, out, response); |
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} |
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/** |
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* Run the query and return a hashtable of results. |
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*/ |
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private Hashtable runQuery(StringBuffer xmlquery)
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private Hashtable runQuery(String xmlquery) |
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{
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Hashtable doclist=null; |
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Connection conn = null; |
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{
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conn = util.getConnection(); |
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DBQuery queryobj = new DBQuery(conn, saxparser); |
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doclist = queryobj.findDocuments(new StringReader(xmlquery.toString()));
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doclist = queryobj.findDocuments(new StringReader(xmlquery)); |
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util.returnConnection(conn); |
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return doclist; |
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} |
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} |
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} |
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} |
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/** |
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* Handle the database query request and return a result set, possibly |
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* transformed from XML into HTML |
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*/ |
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private void handleQueryAction(PrintWriter out, Hashtable params, |
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HttpServletResponse response) |
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{
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String action = ((String[])params.get("action"))[0];
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Hashtable doclist = null; |
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String[] doctypeArr = null; |
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String doctype = null; |
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StringBuffer xmlquery = null; |
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Connection conn = null; |
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if(action.equals("query"))
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{
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xmlquery = new StringBuffer(handleQuery(params)); |
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} |
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else if(action.equals("squery"))
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{
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xmlquery = new StringBuffer(handleSQuery(params)); |
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} |
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//System.out.println("Query is: ");
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//System.out.println(xmlquery.toString()); |
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doclist = runQuery(xmlquery); |
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//System.out.println("result is: " );
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//System.out.println(doclist.toString()); |
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String qformat = ((String[])params.get("qformat"))[0];
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transformDocument(doclist, qformat, xmlquery.toString(), out, response); |
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} |
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/** |
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* Handle the database getdocument request and return a XML document, |
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* possibly transformed from XML into HTML |
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/** |
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* '$Log$ |
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* 'Revision 1.70 2000/08/15 20:02:15 bojilova |
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* 'Cleared hardcoded paths for the location of .html files and use |
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* 'the new "htmlpath" property from metacat.properties file |
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* ' |
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* 'Revision 1.69 2000/08/15 15:58:03 berkley |
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* 'Added decodeMouseAction(Hashtable) to decode the mouse click action outside of handleGetOrPost to allow for easy modification of images in a different application. |
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* ' |
Also available in: Unified diff
remove handleQueryAction() in favor of directly calling handleQuery() and handleSQuery() from doGetOrPost()