[AXIS2C-768] Null pointer exception in WSDL2C compiling schema when generating ADB

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.2.0
• Component/s: wsdl2c tool
• Environment: Windows XP
• Assignee: Dimuthu Gamage
• Reporter: Bill Mitchell
• Created: 15/Nov/07 20:42
• Updated: 07/Apr/20 17:45
• Resolved: 18/Dec/07 20:11

Description

When I attempt to generate C bindings for the WSDL file below, the WSDL2C utility fails with a null pointer exception without generating any stub code whatsoever.

The exception trace is:
>java org.apache.axis2.wsdl.WSDL2C -or -d adb -wv 1.1 -u -uri service.wsdl
Retrieving document at 'service.wsdl'.
Exception in thread "main" org.apache.axis2.wsdl.codegen.CodeGenerationException: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:278)
at org.apache.axis2.wsdl.WSDL2Code.main(WSDL2Code.java:35)
at org.apache.axis2.wsdl.WSDL2C.main(WSDL2C.java:31)
Caused by: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at org.apache.axis2.wsdl.codegen.extension.SimpleDBExtension.engage(SimpleDBExtension.java:53)
at org.apache.axis2.wsdl.codegen.CodeGenerationEngine.generate(CodeGenerationEngine.java:231)
... 2 more
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.axis2.wsdl.codegen.extension.SimpleDBExtension.engage(SimpleDBExtension.java:50)
... 3 more
Caused by: org.apache.axis2.schema.SchemaCompilationException: java.lang.NullPointerException
at org.apache.axis2.schema.writer.CStructWriter.write(CStructWriter.java:197)
at org.apache.axis2.schema.SchemaCompiler.writeComplexType(SchemaCompiler.java:939)
at org.apache.axis2.schema.SchemaCompiler.processNamedComplexSchemaType(SchemaCompiler.java:925)
at org.apache.axis2.schema.SchemaCompiler.processComplexContent(SchemaCompiler.java:1087)
at org.apache.axis2.schema.SchemaCompiler.processContentModel(SchemaCompiler.java:1054)
at org.apache.axis2.schema.SchemaCompiler.processComplexType(SchemaCompiler.java:998)
at org.apache.axis2.schema.SchemaCompiler.processNamedComplexSchemaType(SchemaCompiler.java:919)
at org.apache.axis2.schema.SchemaCompiler.processSchema(SchemaCompiler.java:833)
at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:531)
at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:491)
at org.apache.axis2.schema.SchemaCompiler.process(SchemaCompiler.java:1904)
at org.apache.axis2.schema.SchemaCompiler.processParticle(SchemaCompiler.java:1791)
at org.apache.axis2.schema.SchemaCompiler.processComplexContent(SchemaCompiler.java:1170)
at org.apache.axis2.schema.SchemaCompiler.processContentModel(SchemaCompiler.java:1054)
at org.apache.axis2.schema.SchemaCompiler.processComplexType(SchemaCompiler.java:998)
at org.apache.axis2.schema.SchemaCompiler.processNamedComplexSchemaType(SchemaCompiler.java:919)
at org.apache.axis2.schema.SchemaCompiler.processSchema(SchemaCompiler.java:833)
at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:531)
at org.apache.axis2.schema.SchemaCompiler.processElement(SchemaCompiler.java:502)
at org.apache.axis2.schema.SchemaCompiler.compile(SchemaCompiler.java:309)
at org.apache.axis2.schema.SchemaCompiler.compile(SchemaCompiler.java:219)
at org.apache.axis2.schema.ExtensionUtility.invoke(ExtensionUtility.java:80)
... 8 more
Caused by: java.lang.NullPointerException
at org.apache.axis2.schema.writer.CStructWriter.addPropertyEntries(CStructWriter.java:635)
at org.apache.axis2.schema.writer.CStructWriter.populateInfo(CStructWriter.java:516)
at org.apache.axis2.schema.writer.CStructWriter.getBeanElement(CStructWriter.java:439)
at org.apache.axis2.schema.writer.CStructWriter.process(CStructWriter.java:320)
at org.apache.axis2.schema.writer.CStructWriter.write(CStructWriter.java:192)
... 29 more

I receive this failure both with the WSDL2C released in Axis2-1.3 and in the current nightly build I downloaded yesterday. Of course, it is a little difficult to isolate what in the WSDL is causing the failure, as no stub code is generated that might hint at the problem area. The same WSDL is accepted by the Axis2 WSDL2Java utility, so the issue is specific to C code generation. As the WSDL2Java utility accepts the file, this suggests that the WSDL itself is valid. If -d none is specified on the command line, the WSDL2C utility runs to completion, so the issue is specific to the generation of the C data bindings.

The contents of service.wsdl are:
<?xml version="1.0"?>
<definitions xmlns:fw="http://frameware.xcentrisity.com/services/" xmlns="http://schemas.xmlsoap.org/wsdl/" xmlns:ns="http://www.w3.org/2001/XMLSchema" xmlns:soap-env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" targetNamespace="http://frameware.xcentrisity.com/services/" name="Frameware" ns:schemaLocation="http://schemas.xmlsoap.org/wsdl/ http://schemas.xmlsoap.org/wsdl/2003-02-11.xsd">
<types>
<schema targetNamespace="http://frameware.xcentrisity.com/services/" xmlns="http://www.w3.org/2001/XMLSchema">
<complexType name="ModelType">
<sequence>
<any namespace="##local" minOccurs="1" maxOccurs="1"/>
</sequence>
</complexType>
<complexType name="ExemplarType">
<complexContent>
<extension base="fw:ModelType">
<attribute name="handle" type="string" use="required"/>
</extension>
</complexContent>
</complexType>
<complexType name="InstanceType">
<complexContent>
<extension base="fw:ModelType">
<attribute name="handle" type="string" use="required"/>
</extension>
</complexContent>
</complexType>
<complexType name="getExemplarType">
<attribute name="name" type="string" use="required"/>
<attribute name="exemplarHandle" type="string" use="required"/>
</complexType>
<complexType name="getExemplarResponseType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="exemplar" type="fw:ExemplarType"/>
</sequence>
<attributeGroup ref="fw:ResponseAttributeGroup"/>
<attribute name="supportedMethods" type="fw:MethodListType" use="optional"/>
</restriction>
</complexContent>
</complexType>
<complexType name="BrowseResponseType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="instance" type="fw:InstanceType" minOccurs="0" maxOccurs="unbounded"/>
</sequence>
<attributeGroup ref="fw:ResponseAttributeGroup"/>
</restriction>
</complexContent>
</complexType>
<complexType name="BrowseConditionsType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="conditionInstance" maxOccurs="unbounded">
<complexType>
<complexContent>
<extension base="fw:ModelType">
<attribute name="termIndex" type="unsignedInt" use="optional" default="1"/>
<attribute name="term-index" type="unsignedInt" use="optional" default="1"/>
<attribute name="constraint" type="string" use="required"/>
</extension>
</complexContent>
</complexType>
</element>
</sequence>
<attribute name="name" type="string" use="required"/>
<attribute name="limit" type="unsignedInt" use="optional"/>
<attribute name="exemplarHandle" type="string" use="required"/>
<attribute name="handle" type="string" use="optional"/>
<attribute name="userId" type="string" use="optional"/>
<attribute name="userName" type="string" use="optional"/>
</restriction>
</complexContent>
</complexType>
<complexType name="CreateType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="instance" type="fw:ModelType"/>
</sequence>
<attribute name="name" type="string" use="required"/>
<attribute name="limit" type="unsignedInt" use="optional"/>
<attribute name="handle" type="string" use="optional"/>
<attribute name="exemplarHandle" type="string" use="required"/>
<attribute name="userId" type="string" use="optional"/>
<attribute name="userName" type="string" use="optional"/>
</restriction>
</complexContent>
</complexType>
<complexType name="RetrieveType">
<attribute name="name" type="string" use="required"/>
<attribute name="handle" type="string" use="required"/>
<attribute name="limit" type="unsignedInt" use="optional"/>
<attribute name="exemplarHandle" type="string" use="required"/>
<attribute name="userId" type="string" use="optional"/>
<attribute name="userName" type="string" use="optional"/>
</complexType>
<complexType name="UpdateType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="instance" type="fw:ModelType"/>
</sequence>
<attribute name="name" type="string" use="required"/>
<attribute name="limit" type="unsignedInt" use="optional"/>
<attribute name="handle" type="string" use="required"/>
<attribute name="exemplarHandle" type="string" use="required"/>
<attribute name="userId" type="string" use="optional"/>
<attribute name="userName" type="string" use="optional"/>
</restriction>
</complexContent>
</complexType>
<complexType name="DeleteType">
<attribute name="name" type="string" use="required"/>
<attribute name="handle" type="string" use="required"/>
<attribute name="exemplarHandle" type="string" use="required"/>
<attribute name="userId" type="string" use="optional"/>
<attribute name="userName" type="string" use="optional"/>
</complexType>
<complexType name="StatusResponseType">
<attributeGroup ref="fw:ResponseAttributeGroup"/>
</complexType>
<complexType name="InstanceResponseType">
<complexContent>
<restriction base="anyType">
<sequence>
<element name="instance" type="fw:InstanceType" minOccurs="0" maxOccurs="1"/>
</sequence>
<attributeGroup ref="fw:ResponseAttributeGroup"/>
</restriction>
</complexContent>
</complexType>
<simpleType name="MethodListType">
<list itemType="string"/>
</simpleType>
<attributeGroup name="ResponseAttributeGroup">
<attribute name="responseCode" type="integer" use="optional" default="0"/>
<attribute name="responseMessage" type="string" use="optional"/>
</attributeGroup>
<element name="getExemplar" type="fw:getExemplarType"/>
<element name="getExemplarResponse" type="fw:getExemplarResponseType"/>
<element name="browse" type="fw:BrowseConditionsType"/>
<element name="browseResponse" type="fw:BrowseResponseType"/>
<element name="browseNext" type="fw:BrowseConditionsType"/>
<element name="browseNextResponse" type="fw:BrowseResponseType"/>
<element name="browsePrevious" type="fw:BrowseConditionsType"/>
<element name="browsePreviousResponse" type="fw:BrowseResponseType"/>
<element name="create" type="fw:CreateType"/>
<element name="createResponse" type="fw:InstanceResponseType"/>
<element name="retrieve" type="fw:RetrieveType"/>
<element name="retrieveResponse" type="fw:InstanceResponseType"/>
<element name="update" type="fw:UpdateType"/>
<element name="updateResponse" type="fw:InstanceResponseType"/>
<element name="delete" type="fw:DeleteType"/>
<element name="deleteResponse" type="fw:StatusResponseType"/>
</schema>
</types>
<message name="getExemplarRequest">
<part name="getExemplarRequest" element="fw:getExemplar"/>
</message>
<message name="getExemplarResponse">
<part name="getExemplarResponse" element="fw:getExemplarResponse"/>
</message>
<message name="browseRequest">
<part name="browseRequest" element="fw:browse"/>
</message>
<message name="browseResponse">
<part name="browseResponse" element="fw:browseResponse"/>
</message>
<message name="browseNextRequest">
<part name="browseNext" element="fw:browseNext"/>
</message>
<message name="browseNextResponse">
<part name="browseNextResponse" element="fw:browseNextResponse"/>
</message>
<message name="browsePreviousRequest">
<part name="browsePrevious" element="fw:browsePrevious"/>
</message>
<message name="browsePreviousResponse">
<part name="browsePreviousResponse" element="fw:browsePreviousResponse"/>
</message>
<message name="createRequest">
<part name="create" element="fw:create"/>
</message>
<message name="createResponse">
<part name="createResponse" element="fw:createResponse"/>
</message>
<message name="retrieveRequest">
<part name="retrieve" element="fw:retrieve"/>
</message>
<message name="retrieveResponse">
<part name="retrieveResponse" element="fw:retrieveResponse"/>
</message>
<message name="updateRequest">
<part name="updateRequest" element="fw:update"/>
</message>
<message name="updateResponse">
<part name="updateResponse" element="fw:updateResponse"/>
</message>
<message name="deleteRequest">
<part name="deleteRequest" element="fw:delete"/>
</message>
<message name="deleteResponse">
<part name="deleteResponse" element="fw:deleteResponse"/>
</message>
<portType name="IFramewareService">
<operation name="getExemplar">
<input message="fw:getExemplarRequest"/>
<output message="fw:getExemplarResponse"/>
</operation>
<operation name="browse">
<input message="fw:browseRequest"/>
<output message="fw:browseResponse"/>
</operation>
<operation name="browseNext">
<input message="fw:browseNextRequest"/>
<output message="fw:browseNextResponse"/>
</operation>
<operation name="browsePrevious">
<input message="fw:browsePreviousRequest"/>
<output message="fw:browsePreviousResponse"/>
</operation>
<operation name="create">
<input message="fw:createRequest"/>
<output message="fw:createResponse"/>
</operation>
<operation name="retrieve">
<input message="fw:retrieveRequest"/>
<output message="fw:retrieveResponse"/>
</operation>
<operation name="update">
<input message="fw:updateRequest"/>
<output message="fw:updateResponse"/>
</operation>
<operation name="delete">
<input message="fw:deleteRequest"/>
<output message="fw:deleteResponse"/>
</operation>
</portType>
<binding name="FramewareSoapBinding" type="fw:IFramewareService">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
<operation name="getExemplar">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/getExemplar"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="browse">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/browse"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="browseNext">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/browseNext"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="browsePrevious">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/browsePrevious"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="create">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/create"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="retrieve">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/retrieve"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="update">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/update"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
<operation name="delete">
<soap:operation soapAction="http://services.xcentrisity.com/frameware/delete"/>
<input>
<soap:body use="literal"/>
</input>
<output>
<soap:body use="literal"/>
</output>
</operation>
</binding>
<service name="FramewareService">
<port name="FramewareServicePort" binding="fw:FramewareSoapBinding">
<soap:address location="http://localhost/Frameware/customers/customers.srf"/>
</port>
</service>
</definitions>