Hi,
I'm running into problems when using xinclude with my own
LSResourceResolver. I want to catch the call to the resolver and
return my own LSInput that the parser should use for retrieving the
included contents. What I really want is to filter the included file
myself before letting the parser see it but it fails even for the
simple example provided below. I get the following
NullPointerException:
java.lang.NullPointerException
at
org.apache.xerces.xinclude.XIncludeHandler.searchForRecursiveIncludes(Unknown
Source)
at
org.apache.xerces.xinclude.XIncludeHandler.startDocument(Unknown
Source)
at
org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown
Source)
at
org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at
org.apache.xerces.xinclude.XIncludeHandler.handleIncludeElement(Unknown
Source)
at org.apache.xerces.xinclude.XIncludeHandler.emptyElement(Unknown
Source)
at
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
at
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
at org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
at org.apache.xerces.parsers.DOMParserImpl.parse(Unknown Source)
at Error.main(Error.java:44)
Letting the resolver return null and thereby let the default handler take
care of the include works just fine in the example below. I'm using xerces
2.8.0 and jsdk 1.4.2 and 1.5.
Anyone got a clue what I'm missing?
Many thanks in advance,
/Per
================
Example class 'Error.java'
run
java Error err.xml
in order to reproduce the error.
================
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import org.w3c.dom.Document;
import org.w3c.dom.DOMError;
import org.w3c.dom.DOMErrorHandler;
import org.w3c.dom.bootstrap.DOMImplementationRegistry;
import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.LSException;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSOutput;
import org.w3c.dom.ls.LSParser;
import org.w3c.dom.ls.LSResourceResolver;
public class Error {
public static void main(String[] args) {
if (args.length != 1) {
System.out.println("Usage: java Error <instance file>");
System.exit(0);
}
String instanceFile = args[0];
try {
System.setProperty(DOMImplementationRegistry.PROPERTY,
"org.apache.xerces.dom.DOMImplementationSourceImpl");
DOMImplementationRegistry registry =
DOMImplementationRegistry.newInstance();
final DOMImplementationLS domImplementationLS =
(DOMImplementationLS)registry.getDOMImplementation("LS");
LSParser parser =
domImplementationLS.createLSParser(DOMImplementationLS.MODE_SYNCHRONOUS,
"http://www.w3.org/2001/XMLSchema";);
parser.getDomConfig().setParameter("http://apache.org/xml/features/xinclude";,
Boolean.TRUE);
parser.getDomConfig().setParameter("resource-resolver",
new
TestResolver(domImplementationLS));
parser.getDomConfig().setParameter("error-handler", new
DOMErrorHandler() {
public boolean handleError(DOMError error) {
((Exception)error.getRelatedException()).printStackTrace();
throw new LSException(LSException.PARSE_ERR,
error.getMessage());
}
});
LSInput input = domImplementationLS.createLSInput();
LSOutput output = domImplementationLS.createLSOutput();
input.setByteStream(new FileInputStream(instanceFile));
output.setByteStream(System.out);
Document doc = parser.parse(input);
domImplementationLS.createLSSerializer().write(doc, output);
System.err.println();
} catch (ClassNotFoundException e) {
System.err.println("Unable to find DOM Parser: " +
e.getMessage());
System.exit(1);
} catch (InstantiationException e) {
System.err.println("Unable to find DOM Parser: " +
e.getMessage());
System.exit(1);
} catch (IllegalAccessException e) {
System.err.println("Unable to find DOM Parser: " +
e.getMessage());
System.exit(1);
} catch (FileNotFoundException e) {
System.err.println("Unable to find file: " + instanceFile);
System.exit(1);
}
catch (Throwable t) {
t.printStackTrace();
System.exit(1);
}
}
}
class TestResolver implements LSResourceResolver {
private DOMImplementationLS domImplementationLS;
public TestResolver(DOMImplementationLS domImplementationLS) {
this.domImplementationLS = domImplementationLS;
}
public LSInput resolveResource(String type,
String namespaceURI,
String publicId,
String systemId,
String baseURI) {
System.err.println("==== Resolving '" + type + "' '" + namespaceURI +
"' '" +
publicId + "' '" + systemId + "' '" + baseURI +
"'");
LSInput ret = domImplementationLS.createLSInput();
FileInputStream is = null;
try {
is = new FileInputStream((new URL(systemId)).getPath());
} catch (IOException e) {
e.printStackTrace();
System.exit(1);
}
ret.setByteStream(is);
return ret;
// return null;
}
}
====================
Example xml file 'err.xml'
====================
<?xml version="1.0"?>
<elem xmlns:xi="http://www.w3.org/2001/XInclude";>
<xi:include href="file:errinclude.xml"/>
</elem>
====================
Example xml file 'errinclude.xml'
====================
<anotherElement>Some text for example</anotherElement>
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
