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Posted to j-dev@xerces.apache.org by "Radu Coravu (JIRA)" <xe...@xml.apache.org> on 2012/07/11 15:20:35 UTC

[jira] [Created] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Radu Coravu created XERCESJ-1569:
------------------------------------

             Summary: NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
                 Key: XERCESJ-1569
                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
             Project: Xerces2-J
          Issue Type: Bug
          Components: XML Schema 1.1 Structures
            Reporter: Radu Coravu
             Fix For: 2.11.0


I validate an XML:

<root xmlns="http://xstest-tns/schema11_D4_3_15"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>

with an XML Schema 1.1:

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
    xmlns:tns="http://xstest-tns/schema11_D4_3_15"
    targetNamespace="http://xstest-tns/schema11_D4_3_15"
    elementFormDefault="qualified">
    <xs:element name="root">
        <xs:simpleType>
            <xs:restriction base="xs:string">
                <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
            </xs:restriction>               
        </xs:simpleType>
    </xs:element>
</xs:schema>

Although the schema is 1.1, it is parsed in 1.0-mode.

The NPE is like:

java.lang.NullPointerException
	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)


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[jira] [Commented] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Posted by "Radu Coravu (JIRA)" <xe...@xml.apache.org>.
    [ https://issues.apache.org/jira/browse/XERCESJ-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412599#comment-13412599 ] 

Radu Coravu commented on XERCESJ-1569:
--------------------------------------

Hi,

I am using the Xerces schema 1.1 beta release.

The XML Schema has 1.1 constructs in it (it is an XML Schema 1.1).

As I said, the NPE happens when you parse it as if it was an XML Schema 1.0 

If you parse that XML Schema as if it were an XML Schema of version 1.0 the following error should be obtained:

s4s-elt-invalid: Element 'assertion' is not a valid element in a schema document.

Right now the "Xerces schema 1.1 beta release" throws the NPE instead.

If you look at the code, the class XSDAbstractTraverser contains at some point an if:

else if (facet.equals(SchemaSymbols.ELT_ASSERTION)) {

Then it calls:

attrs = fAttrChecker.checkAttributes(content, false, schemaDoc);

which returns NULL because the schema is parsed as if it were an 1.0 XML Schema.

But the code does not guard this possible case when the "attrs" is NULL.

                
> NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
> ----------------------------------------------------------------------------------------------
>
>                 Key: XERCESJ-1569
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: XML Schema 1.1 Structures
>            Reporter: Radu Coravu
>             Fix For: 2.11.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> I validate an XML:
> <root xmlns="http://xstest-tns/schema11_D4_3_15"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>
> with an XML Schema 1.1:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>     xmlns:tns="http://xstest-tns/schema11_D4_3_15"
>     targetNamespace="http://xstest-tns/schema11_D4_3_15"
>     elementFormDefault="qualified">
>     <xs:element name="root">
>         <xs:simpleType>
>             <xs:restriction base="xs:string">
>                 <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
>             </xs:restriction>               
>         </xs:simpleType>
>     </xs:element>
> </xs:schema>
> Although the schema is 1.1, it is parsed in 1.0-mode.
> The NPE is like:
> java.lang.NullPointerException
> 	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
> 	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)

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[jira] [Commented] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
    [ https://issues.apache.org/jira/browse/XERCESJ-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13412552#comment-13412552 ] 

Mukul Gandhi commented on XERCESJ-1569:
---------------------------------------

I'm reporting my analysis below, by using Xerces XSD 1.1 validator from the SVN.

I get following validation errors when I use your example as it is,

[Warning] x1.xsd:10:100: cvc-xpath.3.13.4.2b: An assert XPath expression such as ('/root = 'present'') containing / or //, on the schema type '#AnonType_root', cannot yield a valid result (since an assert tree is rooted at a parentless element).
[Error] x1.xml:3:76: cvc-assertions-valid: Value '' is not facet-valid with respect to assertion '/root = 'present''.
[Error] x1.xml:3:76: cvc-assertion: Assertion evaluation ('/root = 'present'') for element 'root' on schema type '#AnonType_root' did not succeed.

I believe, this is the intention of our implementation for the example you've posted.

If I change the assertion in your example to,

<xs:assertion test="$value = 'present'" xpathDefaultNamespace="##targetNamespace" />

(or to, <xs:assertion test="$value = 'present'"/>)

and XML instance document to,

<root xmlns="http://xstest-tns/schema11_D4_3_15"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd">present</root>

I get a right schema validation assessment. This seems correct to me.

Are you using the Xerces XSD 1.1 build from SVN, or the Xerces schema 1.1 beta release? I think, the SVN code base would have improvements not present in the published schema 1.1 beta release.
                
> NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
> ----------------------------------------------------------------------------------------------
>
>                 Key: XERCESJ-1569
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: XML Schema 1.1 Structures
>            Reporter: Radu Coravu
>             Fix For: 2.11.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> I validate an XML:
> <root xmlns="http://xstest-tns/schema11_D4_3_15"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>
> with an XML Schema 1.1:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>     xmlns:tns="http://xstest-tns/schema11_D4_3_15"
>     targetNamespace="http://xstest-tns/schema11_D4_3_15"
>     elementFormDefault="qualified">
>     <xs:element name="root">
>         <xs:simpleType>
>             <xs:restriction base="xs:string">
>                 <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
>             </xs:restriction>               
>         </xs:simpleType>
>     </xs:element>
> </xs:schema>
> Although the schema is 1.1, it is parsed in 1.0-mode.
> The NPE is like:
> java.lang.NullPointerException
> 	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
> 	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)

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[jira] [Assigned] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
     [ https://issues.apache.org/jira/browse/XERCESJ-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mukul Gandhi reassigned XERCESJ-1569:
-------------------------------------

    Assignee: Mukul Gandhi
    
> NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
> ----------------------------------------------------------------------------------------------
>
>                 Key: XERCESJ-1569
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: XML Schema 1.1 Structures
>            Reporter: Radu Coravu
>            Assignee: Mukul Gandhi
>             Fix For: 2.11.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> I validate an XML:
> <root xmlns="http://xstest-tns/schema11_D4_3_15"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>
> with an XML Schema 1.1:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>     xmlns:tns="http://xstest-tns/schema11_D4_3_15"
>     targetNamespace="http://xstest-tns/schema11_D4_3_15"
>     elementFormDefault="qualified">
>     <xs:element name="root">
>         <xs:simpleType>
>             <xs:restriction base="xs:string">
>                 <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
>             </xs:restriction>               
>         </xs:simpleType>
>     </xs:element>
> </xs:schema>
> Although the schema is 1.1, it is parsed in 1.0-mode.
> The NPE is like:
> java.lang.NullPointerException
> 	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
> 	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)

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[jira] [Commented] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
    [ https://issues.apache.org/jira/browse/XERCESJ-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413192#comment-13413192 ] 

Mukul Gandhi commented on XERCESJ-1569:
---------------------------------------

@ Radu : I believe, you're analysis is correct. The fix (along the lines suggested by you) has now been committed to SVN. Thanks for reporting this bug, and suggesting a resolution.
                
> NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
> ----------------------------------------------------------------------------------------------
>
>                 Key: XERCESJ-1569
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: XML Schema 1.1 Structures
>            Reporter: Radu Coravu
>            Assignee: Mukul Gandhi
>             Fix For: 2.11.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> I validate an XML:
> <root xmlns="http://xstest-tns/schema11_D4_3_15"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>
> with an XML Schema 1.1:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>     xmlns:tns="http://xstest-tns/schema11_D4_3_15"
>     targetNamespace="http://xstest-tns/schema11_D4_3_15"
>     elementFormDefault="qualified">
>     <xs:element name="root">
>         <xs:simpleType>
>             <xs:restriction base="xs:string">
>                 <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
>             </xs:restriction>               
>         </xs:simpleType>
>     </xs:element>
> </xs:schema>
> Although the schema is 1.1, it is parsed in 1.0-mode.
> The NPE is like:
> java.lang.NullPointerException
> 	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
> 	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)

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[jira] [Resolved] (XERCESJ-1569) NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)

Posted by "Mukul Gandhi (JIRA)" <xe...@xml.apache.org>.
     [ https://issues.apache.org/jira/browse/XERCESJ-1569?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mukul Gandhi resolved XERCESJ-1569.
-----------------------------------

    Resolution: Fixed

marking this issue as resolved. the fix for this was committed to SVN revision 1360925.
                
> NPE when validating XML with XML Schema 1.1 (but validation is made in 1.0 compatibility mode)
> ----------------------------------------------------------------------------------------------
>
>                 Key: XERCESJ-1569
>                 URL: https://issues.apache.org/jira/browse/XERCESJ-1569
>             Project: Xerces2-J
>          Issue Type: Bug
>          Components: XML Schema 1.1 Structures
>            Reporter: Radu Coravu
>            Assignee: Mukul Gandhi
>             Fix For: 2.11.0
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> I validate an XML:
> <root xmlns="http://xstest-tns/schema11_D4_3_15"
>     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
>     xsi:schemaLocation="http://xstest-tns/schema11_D4_3_15 npeXerces.xsd"/>
> with an XML Schema 1.1:
> <?xml version="1.0" encoding="UTF-8"?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
>     xmlns:tns="http://xstest-tns/schema11_D4_3_15"
>     targetNamespace="http://xstest-tns/schema11_D4_3_15"
>     elementFormDefault="qualified">
>     <xs:element name="root">
>         <xs:simpleType>
>             <xs:restriction base="xs:string">
>                 <xs:assertion test="/root = 'present'" xpathDefaultNamespace="##targetNamespace" />
>             </xs:restriction>               
>         </xs:simpleType>
>     </xs:element>
> </xs:schema>
> Although the schema is 1.1, it is parsed in 1.0-mode.
> The NPE is like:
> java.lang.NullPointerException
> 	at org.apache.xerces.impl.xs.traversers.XSDAbstractTraverser.traverseFacets(XSDAbstractTraverser.java:468)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.getSimpleType(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDSimpleTypeTraverser.traverseLocal(Unknown Source)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseNamedElement(XSDElementTraverserXerces.java:397)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverser.traverseNamedElement(XSDElementTraverser.java:69)
> 	at org.apache.xerces.impl.xs.traversers.XSDElementTraverserXerces.traverseGlobal(XSDElementTraverserXerces.java:240)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.traverseSchemas(XSDHandlerXerces.java:1557)
> 	at org.apache.xerces.impl.xs.traversers.XSDHandlerXerces.parseSchema(XSDHandlerXerces.java:694)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadSchema(Unknown Source)
> 	at org.apache.xerces.impl.xs.XMLSchemaLoader.loadGrammar(Unknown Source)
> 	at org.apache.xerces.parsers.XMLGrammarPreparserXerces.preparseGrammar(XMLGrammarPreparserXerces.java:210)

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