Hi,
I was trying to implement LSResourceResolver to load multiple Schemas in my
SchemaFactory but I am getting nullpointer Exception. Below is the code. Please
tell me what I am missing here ?
Thanks
Ajay B.
import java.io.*;
import java.util.*;
import org.w3c.dom.* ;
import org.w3c.dom.ls.* ;
import org.xml.sax.InputSource;
import org.xml.sax.EntityResolver;
import java.net.URL;
//import org.w3c.dom.ls.DOMImplementationLS;
import org.w3c.dom.ls.*;
import javax.xml.XMLConstants;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Schema;
import org.w3c.dom.bootstrap.DOMImplementationRegistry ;
public class SchemaReader
{
private static int errorCount = 0;
String schemaName = null ;
public SchemaReader(String st)
{
System.out.println("debug2");
schemaName = st;
System.out.println("debug3");
Schema schema = loadSchema( schemaName );
System.out.println("debug4");
}
public static void main(String[] a)
{
if (a.length<1)
{
System.out.println("Usage:");
System.out.println("java XsdSchemaValidator schema_file_name " +
"xml_file_name");
}
else
{
//String schemaName = a[0];
System.out.println("debug1");
SchemaReader sr = new SchemaReader(a[0]);
//Schema schema = sr.loadSchema(schemaName);
}
}
public Schema loadSchema(String name)
{
Schema schema = null;
try
{
System.out.println("xxx1");
String language = XMLConstants.W3C_XML_SCHEMA_NS_URI;
System.out.println("xxx2");
SchemaFactory factory = SchemaFactory.newInstance(language);
System.out.println("xxx3");
MyResourceResolver resolver = new MyResourceResolver();
System.out.println("xxx4");
factory.setResourceResolver( resolver );
System.out.println("xxx5");
System.out.println(name);
schema = factory.newSchema(new File(name));
System.out.println("xxx6");
}
catch (Exception e)
{
System.out.println(e.toString());
}
return schema;
}
public class MyResourceResolver implements LSResourceResolver
{
DOMImplementationLS implLS ;
public MyResourceResolver()
{
try
{
System.setProperty(DOMImplementationRegistry.PROPERTY,
"org.apache.xerces.dom.DOMImplementationSourceImpl");
DOMImplementationRegistry registry =
DOMImplementationRegistry.newInstance();
DOMImplementation domImpl =
registry.getDOMImplementation("LS 3.0");
DOMImplementationLS implLS = (DOMImplementationLS)domImpl;
}
catch ( Exception e)
{
System.out.println("xxx");
System.out.println(e.toString());
}
}
public LSInput resolveResource(String type, String namespaceURI,
String publicId, String systemId, String baseURI )
{
LSInput input = implLS.createLSInput();
System.out.println("System Id :" + systemId);
System.out.println("Base URI :" + baseURI);
FileInputStream fis = null;
try
{
fis = new FileInputStream(new File(systemId));
}
catch(Exception e)
{
System.out.println("debug1");
System.out.println(e.toString());
}
input.setByteStream(fis);
input.setSystemId(systemId);
return input ;
//return fis ;
}
}
}
Output
========
debug1
debug2
debug3
xxx1
xxx2
xxx3
xxx4
xxx5
clpt.001.001.01.xsd
java.lang.NullPointerException
debug4
--- On Tue, 11/11/08, ajay bhadauria <[EMAIL PROTECTED]> wrote:
> From: ajay bhadauria <[EMAIL PROTECTED]>
> Subject: Re: use of ResourceResolver in Schema Parsing
> To: j-users@xerces.apache.org
> Date: Tuesday, November 11, 2008, 7:35 PM
> Hi,
>
> I could not figure out how to implement LSResourceResolver
> with SchemaFactory so that all external entities could be
> loaded when main schema gets loaded.
>
> Any code sample will be greatly appriciated .
>
> Thanks
>
> --- On Mon, 11/10/08, ajay bhadauria
> <[EMAIL PROTECTED]> wrote:
>
> > From: ajay bhadauria <[EMAIL PROTECTED]>
> > Subject: use of ResourceResolver in Schema Parsing
> > To: j-users@xerces.apache.org
> > Date: Monday, November 10, 2008, 8:24 PM
> > Hi,
> >
> > I am using SchemaFactory and then from factory I am
> setting
> > setResourceResolver to resolve external entities.
> while
> > reading schema which refers to other schemas through
> import
> > and include, but I am not able to construct LSInput in
> > resolveResource method of LSResourceResolver
> interface.
> >
> > What should I do to construct the LSInput in
> > resolveResource method ?
> >
> > Please find the attached java file. Please help me how
> I
> > should do it ?
> >
> > Regards
> >
> > Ajay
> >
> >
> >
> >
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>
>
>
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