I guess this boils down to the question of how namespaces are handled by
Xupdate.
I tried this same xupdate modification on an eXist database. It doesn't
throw a Null Pointer exception, but instead it ignores the entire
modification. The only way I can get it to apply the modification is by
removing both of the default namespace attributes
(xmlns="http://lett.com/ns/netconf/server/1.0"; on the <root> element and
xmlns="lett.com/example" on the <top> element).
I would really appreciate it if someone could explain what is going on here.
- Andy
Andy Putnins wrote:
I've tried to track this down with the Eclipse debugger attached to the Tomcat degug port,
but I'm stuck because I can't find the source for org.xmldb.xupdate.lexus.XUpdateQueryImpl.
Where are the sources for the org.xmldb.xupdate.lexus.* packages which Xindice extends?
The issue appears to be that my default namespace, "lett.com/example" is stored in the
"namespaces"
HashMap within org.xmldb.xupdate.lexus.XUpdateQueryImpl with a *null* prefix key instead of a
zero-length string (""). The debugger shows the contents of "namespaces" as:
{null=lett.com/example, urn=urn:ietf:params:xml:ns:netconf:base:1.0,
xu=http://www.xmldb.org/xupdate}
org.apache.xindice.xml.NamespaceMap.getContextNode() throws a NPE at line 63
because pfx is null:
if (pfx.equals("")) {...}
I can't see how the "namespaces" hashmap is constructed without the source.
- Andy
On Thu, 25 Dec 2008 12:38:43 -0600 Andy Putnins wrote:
> I am trying to execute an XUpdate transaction against a document,
> and getting a null pointer exception. Any ideas what the problem
> might be?
>
> Document in DB:
>
> <?xml version="1.0" encoding="utf-8"?>
> <root xmlns="http://lett.com/ns/netconf/server/1.0";><top xmlns="lett.com/example"
/></
root>
>
> Xindice log:
>
> INFO: [http-8888-1] '/db/netconf' Query document candidate, query: <?xml version
> ="1.0" encoding="UTF-8"?>
> <xu:modifications xmlns:xu="http://www.xmldb.org/xupdate"; version="1.0">
>
> <xu:insert-after select="/top">
> <interface xmlns="lett.com/example"
xmlns:urn="urn:ietf:params:xml:ns:ne
> tconf:base:1.0">
> <name>Ethernet0/0</name>
> <mtu>1500</mtu>
> </interface>
> </xu:insert-after>
>
> </xu:modifications>
> Dec 25, 2008 12:08:50 PM
org.apache.xindice.core.xupdate.XUpdateQueryResolver$XU
> pdateQuery execute
> WARNING: ignored exception
> java.lang.NullPointerException
> at org.apache.xindice.xml.NamespaceMap.getContextNode(NamespaceMap.java:
> 63)
> at org.apache.xindice.core.xupdate.XUpdateImpl.execute(XUpdateImpl.java:
> 99)
> at org.apache.xindice.core.xupdate.XUpdateQueryResolver$XUpdateQuery.exe
> cute(XUpdateQueryResolver.java:141)
> at org.apache.xindice.core.xupdate.XUpdateQueryResolver.query(XUpdateQue
> ryResolver.java:83)
> at org.apache.xindice.core.query.QueryEngine.query(QueryEngine.java:126)
> at org.apache.xindice.core.Collection.queryDocument(Collection.java:1291
> )
> at org.apache.xindice.server.rpc.messages.Query.execute(Query.java:58)
> at org.apache.xindice.server.rpc.RPCMessageInterface.run(RPCMessageInter
> face.java:49)
> at sun.reflect.GeneratedMethodAccessor28.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
> sorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.xmlrpc.Invoker.execute(XmlRpcServer.java)
> at org.apache.xmlrpc.XmlRpcServer$Worker.executeInternal(XmlRpcServer.ja
> va)
> at org.apache.xmlrpc.XmlRpcServer$Worker.execute(XmlRpcServer.java)
> at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java)
> at org.apache.xmlrpc.XmlRpcServer.execute(XmlRpcServer.java)
> at org.apache.xindice.server.XindiceServlet.doPost(XindiceServlet.java:9
> 2)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
> icationFilterChain.java:290)
> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
> ilterChain.java:206)
> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
> alve.java:233)
> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
> alve.java:191)
> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
> ava:128)
> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
> ava:102)
> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
> ve.java:109)
> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
> a:286)
> at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
> :845)
> at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
> ss(Http11Protocol.java:583)
> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:44
> 7)
> at java.lang.Thread.run(Thread.java:619)
>
>
> - Andy
>
