DO NOT REPLY [Bug 30051] New: - Explicit dependency to Xerces breaks JSTL xml tags with J2SE 1.5

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http://issues.apache.org/bugzilla/show_bug.cgi?id=30051

Explicit dependency to Xerces breaks JSTL xml tags with J2SE 1.5

           Summary: Explicit dependency to Xerces breaks JSTL xml tags with
                    J2SE 1.5
           Product: Taglibs
           Version: 1.1.0
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Standard Taglib
        AssignedTo: taglibs-dev@jakarta.apache.org
        ReportedBy: henrik119@hotmail.com


SYMPTOM:

Exception when using JSTL XML transform tags on Tomcat 5.0.25 and J2SE 1.5 
Beta 2 without Tomcat-bundled XML parser

exception 

javax.servlet.ServletException: javax.servlet.jsp.JspException: Can't create 
default XMLReader; is system property org.xml.sax.driver set?
	org.apache.jasper.runtime.PageContextImpl.doHandlePageException
(PageContextImpl.java:821)
	org.apache.jasper.runtime.PageContextImpl.handlePageException
(PageContextImpl.java:758)
	org.apache.jsp.xml.Transform_jsp._jspService(Transform_jsp.java:135)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:298)
	org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:292)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)


root cause 

org.xml.sax.SAXException: Can't create default XMLReader; is system property 
org.xml.sax.driver set?
	org.xml.sax.helpers.XMLReaderFactory.createXMLReader
(XMLReaderFactory.java:155)
	org.apache.taglibs.standard.tag.common.xml.TransformSupport.getSource
(Unknown Source)
	org.apache.taglibs.standard.tag.common.xml.TransformSupport.getSource
(Unknown Source)
	org.apache.taglibs.standard.tag.common.xml.TransformSupport.doStartTag
(Unknown Source)
	org.apache.jsp.xml.Transform_jsp._jspx_meth_x_transform_0
(Transform_jsp.java:224)
	org.apache.jsp.xml.Transform_jsp._jspService(Transform_jsp.java:89)
	org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
	org.apache.jasper.servlet.JspServletWrapper.service
(JspServletWrapper.java:298)
	org.apache.jasper.servlet.JspServlet.serviceJspFile
(JspServlet.java:292)
	org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:810)


STEPS TO REPRODUCE:
 1) Install J2SE 1.5 Beta 2 as only JVM (just to make sure)
 2) Intall Tomcat 5.0.x (I used 5.0.25)
 3) Remove Tomcat's bundled Xerces XML parser and API definitions from 
$CATALINA_HOME$/common/endorsed
 4) Start Tomcat
 5) Deploy JSTL examples (standard-examples.war) to Tomcat
 6) Visit http://localhost:8080/standard-examples/xml/Transform.jsp

CAUSE:
JSTL tries to use hard-wired Xerces parser which is distributed under new 
package name in J2SE 1.5. See  
http://java.sun.com/j2se/1.5.0/docs/guide/xml/jaxp/JAXP-Compatibility_150.html

REMEDY:
Remove explict dependency to Xerces from JSTL

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