[Mono-bugs] [Bug 501763] New: Xml schema validation fails when using xs:import (patch included)

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http://bugzilla.novell.com/show_bug.cgi?id=501763


           Summary: Xml schema validation fails when using xs:import
                    (patch included)
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.4.x
          Platform: i686
        OS/Version: Ubuntu
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Sys.XML
        AssignedTo: atsushi at ximian.com
        ReportedBy: jonas.larsson at manodo.se
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.10)
Gecko/2009042523 Ubuntu/9.04 (jaunty) Firefox/3.0.10

Please run the following test case:

string xsd1 = @"

<xs:schema id='foo1'

    targetNamespace='foo1'

    elementFormDefault='qualified'

    xmlns='foo1'  

    xmlns:xs='http://www.w3.org/2001/XMLSchema'

    xmlns:f2='foo2'>



    <xs:import namespace='foo2' />

    <xs:element name='Foo1Element' type='f2:Foo2ExtendedType'/>    

</xs:schema>";



string xsd2 = @"

<xs:schema id='foo2'

    targetNamespace='foo2'

    elementFormDefault='qualified'

    xmlns='foo2'    

    xmlns:xs='http://www.w3.org/2001/XMLSchema' >



    <xs:element name='Foo2Element' type='Foo2Type' />



    <xs:complexType name='Foo2Type'>

        <xs:attribute name='foo2Attr' type='xs:string' use='required'/>

    </xs:complexType>



    <xs:complexType name='Foo2ExtendedType'>

        <xs:complexContent>

<xs:extension base='Foo2Type'>

    <xs:attribute name='foo2ExtAttr' type='xs:string' use='required'/>

</xs:extension>

        </xs:complexContent>

    </xs:complexType>

</xs:schema>";





XmlDocument doc = new XmlDocument ();



XmlSchema schema1 = XmlSchema.Read (XmlReader.Create (new StringReader (xsd1)),
null);

XmlSchema schema2 = XmlSchema.Read (XmlReader.Create (new StringReader (xsd2)),
null);



doc.LoadXml (@"

    <Foo2Element

        foo2Attr='dummyvalue1'

        xmlns='foo2'

    />");

doc.Schemas.Add (schema2);

doc.Validate (null);



            doc = new XmlDocument();

            doc.LoadXml(@"

    <Foo1Element

        foo2Attr='dummyvalue1'

        foo2ExtAttr='dummyvalue2'

        xmlns='foo1'

    />");

doc.Schemas.Add (schema2);

            doc.Schemas.Add (schema1);

doc.Validate (null);

---------

Running this on mono gives:
System.Xml.Schema.XmlSchemaException: XmlSchema error: Named item foo2Attr was
already contained in the schema object table. Related schema item SourceUri: ,
Line 11, Position 7.

---------

Cause:
When validating second document schema2's types are already compiled and
validated. However, checking IsCompiled the second time returns false since we
have a new validationId on the schema. The result is that schema2's types are
compiled again. On a XmlSchemaComplexType the attributeUses collection then
already contains the results from the previous validation. When validated
again, the above Exception is thrown.

Solution:
Clear XmlSchemaComplexType.attributeUses before Compilation. The patch is a one
liner. Add
attributeUses.Clear()
in the beginning of XmlSchemaComplexType.Compile.

Will upload diff once I've submitted this and gotten a bug number.





Reproducible: Always

Steps to Reproduce:
Run above code
Actual Results:  
Exception

Expected Results:  
Successful validation

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