XML parser Problem in Oracle 9iAS

Question

Dear All,
I am trying to parse a xml file by using a SAX Parser.
I am getting error "oracle.xml.parser.v2.XMLParseException: Invalid InputSource.'. I have already included 'xerces.jar' in the classpath.
But it is always taking oracle xml parser.
How to change the default XML parser in Oracle 9ias.
This is my report.jsp File
<%@ page import="java.io.*,java.util.*,java.sql.*,javax.sql.*,javax.naming.*,javax.jms.*,iims.util.*,javax.xml.parsers.*,org.xml.sax.*,org.xml.sax.helpers.*, org.w3c.dom.*"%>
<%
generateTree();
%>
<%!
     //This method is to be called during startup. It will generate the template and rule nodes.
     public static void generateTree() throws Exception
          //Proceed with this method if the template and rule trees are not built already.
          //if (nodeTemplate != null && nodeRule != null) return;
          // Validate
          Node nodeRule = parseXml("d:\\ora9ias\\j2ee\\home\\Reports\\IIMSReportsTemplate1.xml");
     }//generateTree
%>
<%!
     //parse the input file and return a node.
     private static Node parseXml(String fileName) throws Exception
          //Parse the input file
          Document objDocument = null;
          DocumentBuilder objDocumentBuilder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
          objDocument = objDocumentBuilder.parse(fileName);
          Node nodeRet = objDocument;
          return nodeRet;
     }//parseXml
%>
Report template:
<ROOT>
     <HEADINGS>
          <HEADING1>H1</HEADING1>
          <HEADING2>H2</HEADING2>
          <HEADING3>H3</HEADING3>
          <HEADING4>H4</HEADING4>
          <HEADING5>H5</HEADING5>
          <HEADING6>H6</HEADING6>
     </HEADINGS>
     <ROWSETS>
          <ROWSET>
               <COLHDRS>
               </COLHDRS>
               <ROWS>
               </ROWS>
          </ROWSET>
     </ROWSETS>
     <Footer>
          <PageNo>Generate</PageNo>
          <Date>SystemDate</Date>
     </Footer>
</ROOT>
Stack Trace:
strRuleFileD:\ora9ias\j2ee\home\Reports\IIMSReportsRules.xml
oracle.xml.parser.v2.XMLParseException: Invalid InputSource.
at oracle.xml.parser.v2.XMLError.flushErrors(XMLError.java:145)
at oracle.xml.parser.v2.XMLReader.pushXMLReader(XMLReader.java:208)
at oracle.xml.parser.v2.XMLParser.parse(XMLParser.java:140)
at oracle.xml.jaxp.JXDocumentBuilder.parse(JXDocumentBuilder.java:96)
at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:165)
at iims.REPORTS.IIMSGenerateReport.parseXml(IIMSGenerateReport.java:115)
at iims.REPORTS.IIMSGenerateReport.generateTree(IIMSGenerateReport.java:
100)
at iims.REPORTS.IIMSGenerateReport.buildXML(IIMSGenerateReport.java:147)
at PCREPORT_PROCESS.processBody(PCREPORT_PROCESS.java:3248)
at PCREPORT_PROCESS.doPost(PCREPORT_PROCESS.java:100)
at PCREPORT_PROCESS.doGet(PCREPORT_PROCESS.java:92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:244)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:336)
at com.evermind.server.http.ResourceFilterChain.doFilter(ResourceFilterC
hain.java:59)
at oracle.security.jazn.oc4j.JAZNFilter.doFilter(JAZNFilter.java:283)
at com.evermind.server.http.ServletRequestDispatcher.invoke(ServletReque
stDispatcher.java:523)
at com.evermind.server.http.ServletRequestDispatcher.forwardInternal(Ser
vletRequestDispatcher.java:269)
at com.evermind.server.http.HttpRequestHandler.processRequest(HttpReques
tHandler.java:735)
at com.evermind.server.http.AJPRequestHandler.run(AJPRequestHandler.java
:151)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:64)
Please advise.
Thanks
Siva Kishor Rao U

Answer 1

Adding Xerces XML parser is not enough to make it work. Since some version of JDK (I think 1.4.X) XML parser is included and for older version it can be setup like a runtime option. And this is probably how ORACLE is using its XML parser. If you want to use different parser, you have to pass runtime option to JVM - for Xalan it looks like this:
-Djavax.xml.transform.TransformerFactory=org.apache.xalan.processor.TransformerFactoryImpl
...this way it becomes default parser factory used by javax interface functions. Look for documentation on xml.apache.org
Myrra