Michael,
I tried to implemented LSResourceResolver different way and it seems that it is
resolving external entities but when it tried to validate it fails.
I do not know what else I am missing ?
Please find the attached java , xsd and xml file.
Regards
Ajay.
--- On Wed, 11/12/08, Michael Glavassevich <[EMAIL PROTECTED]> wrote:
> From: Michael Glavassevich <[EMAIL PROTECTED]>
> Subject: Re: use of ResourceResolver in Schema Parsing
> To: j-users@xerces.apache.org
> Date: Wednesday, November 12, 2008, 3:09 AM
> Hi Ajay,
>
> The NullPointerException could have come from any number of
> places. It
> would help if you posted a stack trace.
>
> Also, though it doesn't appear it was even called your
> LSResourceResolver
> is making assumptions about the format of the systemId
> which aren't
> generally true. It's a URI (e.g. http://www.w3.org),
> not a file path. It
> doesn't look like you're trying to do anything in
> the resolver which the
> parser wouldn't already do by default. If that's
> all you were planning to
> do there there's not much point in registering a
> resolver.
>
> Thanks.
>
> Michael Glavassevich
> XML Parser Development
> IBM Toronto Lab
> E-mail: [EMAIL PROTECTED]
> E-mail: [EMAIL PROTECTED]
>
> ajay bhadauria <[EMAIL PROTECTED]> wrote on
> 11/11/2008 11:42:30 AM:
>
> > 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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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 javax.xml.XMLConstants;
import javax.xml.validation.SchemaFactory;
import javax.xml.validation.Schema;
public class SchemaReader
{
private static int errorCount = 0;
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];
Schema schema = loadSchema(schemaName);
}
}
public static Schema loadSchema(String name)
{
Schema schema = null;
try
{
String language = XMLConstants.W3C_XML_SCHEMA_NS_URI;
SchemaFactory factory = SchemaFactory.newInstance(language);
MyResourceResolver resolver = new MyResourceResolver();
factory.setResourceResolver( resolver );
schema = factory.newSchema(new File(name));
}
catch (Exception e)
{
System.out.println(e.toString());
}
return schema;
}
public static class MyResourceResolver implements LSResourceResolver
{
private DOMImplementationLS domImplementationLS = new
DOMImplementationLS();
public LSInput resolveResource(String type, String namespaceURI,
String publicId, String systemId, String baseURI )
{
LSInput ret = domImplementationLS.createLSInput();
FileInputStream fis = null;
try
{
fis = new FileInputStream((new URL(systemId)).getPath());
}
catch(Exception e)
{
System.out.println(e.toString());
}
ret.setSystemId(systemId);
return ret.setByteStream(fis);
}
}
}
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
targetNamespace="http://www.company.org";
xmlns="http://www.company.org";
elementFormDefault="unqualified"
xmlns:per="http://www.person.org";
xmlns:pro="http://www.product.org";>
<xsd:import namespace="http://www.person.org";
schemaLocation="Person.xsd"/>
<xsd:import namespace="http://www.product.org";
schemaLocation="Product.xsd"/>
<xsd:element name="Company">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Person" type="per:PersonType"
maxOccurs="unbounded"/>
<xsd:element name="Product" type="pro:ProductType"
maxOccurs="unbounded"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:schema>
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
targetNamespace="http://www.product.org";
xmlns="http://www.product.org";
elementFormDefault="unqualified">
<xsd:complexType name="ProductType">
<xsd:sequence>
<xsd:element name="Type" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
<?xml version="1.0"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema";
targetNamespace="http://www.person.org";
xmlns="http://www.person.org";
elementFormDefault="unqualified">
<xsd:complexType name="PersonType">
<xsd:sequence>
<xsd:element name="Name" type="xsd:string"/>
<xsd:element name="SSN" type="xsd:string"/>
</xsd:sequence>
</xsd:complexType>
</xsd:schema>
<?xml version="1.0"?>
<Company xmlns:c="http://www.company.org";
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation= "http://www.company.org Company.xsd">
<Person>
<Name>John Doe</Name>
<SSN>123-45-6789</SSN>
</Person>
<Product>
<Type>Widget</Type>
</Product>
</Company>
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