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https://issues.apache.org/jira/browse/WSCOMMONS-173?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ajith Harshana Ranabahu resolved WSCOMMONS-173.
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Resolution: Won't Fix
Assignee: Ajith Harshana Ranabahu
I am marking this issue as resolved since it is not very clear whether it is
actually a problem with Axis2 or XMLSchema.
> targetNamespace attribute on schema tag seems to be required when using import
> ------------------------------------------------------------------------------
>
> Key: WSCOMMONS-173
> URL: https://issues.apache.org/jira/browse/WSCOMMONS-173
> Project: WS-Commons
> Issue Type: Bug
> Components: XmlSchema
> Environment: Windows XP, JRE 1.5.0_06
> Reporter: simon clare
> Assignee: Ajith Harshana Ranabahu
> Attachments: Request_Logon.xsd, service.wsdl
>
>
> Apologies if this is:
> A: not a very clear bug report. I should really recreate this in isolation,
> but I'm too idle.
> B: Actually nothing in fact to do with WS-Commons XMLSchema
> I'm using Axis2's org.apache.axis2.wsdl.WSDL2Java which reads a WSDL in, and
> does a bunch of fun generation stuff. My WSDL defines a document literal
> style Web Service which includes external XSD's. Those XSD's then internally
> include a whole bunch of other XSD's. Under the hood Axis2 is using
> org.apache.ws.commons.schema.XmlSchemaCollection.read to read the inlined
> schemas.
> The chunk of code which does this is in
> org.apache.axis2.description.WSDLToAxisServiceBuilder:
> protected XmlSchema getXMLSchema(Element element, String baseUri) {
> XmlSchemaCollection schemaCollection = new XmlSchemaCollection();
> if (baseUri != null) schemaCollection.setBaseUri(baseUri);
> if (customResolver != null) {
> schemaCollection.setSchemaResolver(customResolver);
> }
> return schemaCollection.read(element);
> }
> As far as I can work out "element" is the root DOM node of the imported XSD.
> XMLSchema then falls over with a NullPointerException as follows:
> log4j:WARN No appenders could be found for logger
> (org.apache.axis2.description.WSDL11ToAxisServiceBuilder).
> log4j:WARN Please initialize the log4j system properly.
> Exception in thread "main"
> org.apache.axis2.wsdl.codegen.CodeGenerationException: Error parsing WSDL
> at
> org.apache.axis2.wsdl.codegen.CodeGenerationEngine.<init>(CodeGenerationEngine.java:112)
> at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:32)
> at org.apache.axis2.wsdl.WSDL2Java.main(WSDL2Java.java:21)
> Caused by: org.apache.axis2.AxisFault: java.lang.NullPointerException; nested
> exception is:
> java.lang.RuntimeException: java.lang.NullPointerException
> at
> org.apache.axis2.description.WSDL11ToAxisServiceBuilder.populateService(WSDL11ToAxisServiceBuilder.java:250)
> at
> org.apache.axis2.wsdl.codegen.CodeGenerationEngine.<init>(CodeGenerationEngine.java:103)
> ... 2 more
> Caused by: java.lang.RuntimeException: java.lang.NullPointerException
> at
> org.apache.ws.commons.schema.SchemaBuilder.resolveXmlSchema(SchemaBuilder.java:1808)
> at
> org.apache.ws.commons.schema.SchemaBuilder.resolveXmlSchema(SchemaBuilder.java:1820)
> at
> org.apache.ws.commons.schema.SchemaBuilder.handleImport(SchemaBuilder.java:1552)
> at
> org.apache.ws.commons.schema.SchemaBuilder.handleXmlSchemaElement(SchemaBuilder.java:156)
> at
> org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:315)
> at
> org.apache.axis2.description.WSDLToAxisServiceBuilder.getXMLSchema(WSDLToAxisServiceBuilder.java:132)
> at
> org.apache.axis2.description.WSDL11ToAxisServiceBuilder.copyExtensibleElements(WSDL11ToAxisServiceBuilder.java:1719)
> at
> org.apache.axis2.description.WSDL11ToAxisServiceBuilder.populateService(WSDL11ToAxisServiceBuilder.java:214)
> ... 3 more
> Caused by: java.lang.NullPointerException
> at
> org.apache.ws.commons.schema.SchemaBuilder$1.validate(SchemaBuilder.java:1534)
> at
> org.apache.ws.commons.schema.SchemaBuilder.setNamespaceAttributes(SchemaBuilder.java:283)
> at
> org.apache.ws.commons.schema.SchemaBuilder.handleXmlSchemaElement(SchemaBuilder.java:78)
> at
> org.apache.ws.commons.schema.SchemaBuilder.build(SchemaBuilder.java:67)
> at
> org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:325)
> at
> org.apache.ws.commons.schema.XmlSchemaCollection.read(XmlSchemaCollection.java:272)
> at
> org.apache.ws.commons.schema.SchemaBuilder.resolveXmlSchema(SchemaBuilder.java:1806)
> When the schema is initially created via the constructor
> XmlSchema(XmlSchemaCollection parent) it does nothing with the attribute
> syntacticalTargetNamespace. The code in SchemaBuilder.setNamespaceAttributes
> wants to set the namespace if its there. If its not there then ignores it, as
> its expecting there not to be a validator class variable in the XMLSchema
> object if there is no namespace. However, somehow in this instance of the
> Schema a validator has been created (not quite got to how yet, as it's a fun
> little anonymous inner class and my head hurts).
> Basically SchemaBuilder$TargetNamespaceValidator.validate:
> public void validate(XmlSchema pSchema) {
> final boolean valid;
> if (isEmpty(uri)) {
> valid = isEmpty(pSchema.syntacticalTargetNamespace);
> } else {
> valid = pSchema.syntacticalTargetNamespace.equals(uri);
> }
> finds uri not to be empty (not sure which of the many possible URI's this is)
> and assumes you must have a syntacticalTargetNamespace to call equals on.
> Unfortunately its null.
> Is this:
> A: An Axis2 problem (they using your API wrongly)?
> B: A bug in XMLSchema
> C: An incorrectly defined XSD trying to be imported.
> It seems to work OK if I set my imported xsd's to have a targetNamespace.
> However, I think the XSD spec says they don't *have* to have one. In any case
> the rather unpleasant Null Pointer might not be the best way to deal with any
> error condition.
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