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Posted to c-dev@xerces.apache.org by "Andrew Fang (JIRA)" <xe...@xml.apache.org> on 2005/10/14 22:03:44 UTC
[jira] Created: (XERCESC-1516) identity constraint volation not caught when xpath contains default namespace
identity constraint volation not caught when xpath contains default namespace
-----------------------------------------------------------------------------
Key: XERCESC-1516
URL: http://issues.apache.org/jira/browse/XERCESC-1516
Project: Xerces-C++
Type: Bug
Components: Validating Parser (Schema) (Xerces 1.5 or up only)
Versions: 2.6.0
Environment: Windows XP
Reporter: Andrew Fang
The following schema contains an identity constraint on the uniqueness of ISBN number. However, no error is reported when duplicated entries for ISBN exist. The problem seem to be that XPath parser does not parse default namespace correctly. If a prefix is added (xmlns:x="....") and use the prefix in xpath expression (e.g. <xsd:selector xpath="x:Book"/> ...), the violation is found.
The following is a possible fix for the problem:
in XercesXpath.cpp ln 510 and 585, change
if (scopeContext && !aToken == -1) {
prefix = stringPool->getValueForId(aToken);
uri = scopeContext->getNamespaceForPrefix(prefix);
}
to
if (scopeContext) {
if(aToken == -1) { // no prefix, must be default namespace
prefix = XMLUni::fgZeroLenString;
} else {
prefix = stringPool->getValueForId(aToken);
}
uri = scopeContext->getNamespaceForPrefix(prefix);
}
------- Schema ---------------
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.publishing.org"
xmlns="http://www.publishing.org"
elementFormDefault="qualified">
<xsd:element name="BookCatalogue">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Book" minOccurs="1" maxOccurs="unbounded">
<xsd:complexType>
<xsd:sequence>
<xsd:element name="Title" type="xsd:string" minOccurs="1" maxOccurs="1"/>
<xsd:element name="Author" type="xsd:string" minOccurs="1" maxOccurs="1"/>
<xsd:element name="ISBN" type="xsd:string" minOccurs="1" maxOccurs="1"/>
<xsd:element name="Publisher" type="xsd:string" minOccurs="1" maxOccurs="1"/>
<xsd:element name="Date" type="xsd:string" minOccurs="1" maxOccurs="1"/>
</xsd:sequence>
</xsd:complexType>
</xsd:element>
</xsd:sequence>
</xsd:complexType>
<xsd:unique name="ISBNnumber">
<xsd:selector xpath="Book"/>
<xsd:field xpath="ISBN"/>
</xsd:unique>
</xsd:element>
</xsd:schema>
--------- xml instance -----------
<?xml version="1.0" encoding="UTF-8"?>
<BookCatalogue
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.publishing.org"
xsi:schemaLocation="http://www.publishing.org idc001.nogen.xsd">
<Book>
<Title>My Life and Times</Title>
<Author>Paul McCartney</Author>
<ISBN>43892</ISBN>
<Publisher>McMillin Publishing</Publisher>
<Date>1998</Date>
</Book>
<Book>
<Title>My Life and Times</Title>
<Author>Paul McCartney</Author>
<ISBN>43892</ISBN>
<Publisher>McMillin Publishing</Publisher>
<Date>1998</Date>
</Book>
</BookCatalogue>
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[jira] Commented: (XERCESC-1516) identity constraint volation not caught when xpath contains default namespace
Posted by "David Bertoni (JIRA)" <xe...@xml.apache.org>.
[ http://issues.apache.org/jira/browse/XERCESC-1516?page=comments#action_12332107 ]
David Bertoni commented on XERCESC-1516:
----------------------------------------
I don't believe this is a bug. In XPath 1.0, the default namespace is not used when an XPath expression contains a node test without a prefix:
http://www.w3.org/TR/xpath#node-tests
"A QName in the node test is expanded into an expanded-name using the namespace declarations from the expression context. This is the same way expansion is done for element type names in start and end-tags except that the default namespace declared with xmlns is not used: if the QName does not have a prefix, then the namespace URI is null (this is the same way attribute names are expanded). It is an error if the QName has a prefix for which there is no namespace declaration in the expression context."
> identity constraint volation not caught when xpath contains default namespace
> -----------------------------------------------------------------------------
>
> Key: XERCESC-1516
> URL: http://issues.apache.org/jira/browse/XERCESC-1516
> Project: Xerces-C++
> Type: Bug
> Components: Validating Parser (Schema) (Xerces 1.5 or up only)
> Versions: 2.6.0
> Environment: Windows XP
> Reporter: Andrew Fang
>
> The following schema contains an identity constraint on the uniqueness of ISBN number. However, no error is reported when duplicated entries for ISBN exist. The problem seem to be that XPath parser does not parse default namespace correctly. If a prefix is added (xmlns:x="....") and use the prefix in xpath expression (e.g. <xsd:selector xpath="x:Book"/> ...), the violation is found.
> The following is a possible fix for the problem:
> in XercesXpath.cpp ln 510 and 585, change
> if (scopeContext && !aToken == -1) {
> prefix = stringPool->getValueForId(aToken);
> uri = scopeContext->getNamespaceForPrefix(prefix);
> }
> to
> if (scopeContext) {
> if(aToken == -1) { // no prefix, must be default namespace
> prefix = XMLUni::fgZeroLenString;
> } else {
> prefix = stringPool->getValueForId(aToken);
> }
> uri = scopeContext->getNamespaceForPrefix(prefix);
> }
> ------- Schema ---------------
> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> targetNamespace="http://www.publishing.org"
> xmlns="http://www.publishing.org"
> elementFormDefault="qualified">
> <xsd:element name="BookCatalogue">
> <xsd:complexType>
> <xsd:sequence>
> <xsd:element name="Book" minOccurs="1" maxOccurs="unbounded">
> <xsd:complexType>
> <xsd:sequence>
> <xsd:element name="Title" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Author" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="ISBN" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Publisher" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Date" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> </xsd:sequence>
> </xsd:complexType>
> </xsd:element>
> </xsd:sequence>
> </xsd:complexType>
> <xsd:unique name="ISBNnumber">
> <xsd:selector xpath="Book"/>
> <xsd:field xpath="ISBN"/>
> </xsd:unique>
> </xsd:element>
> </xsd:schema>
> --------- xml instance -----------
> <?xml version="1.0" encoding="UTF-8"?>
> <BookCatalogue
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns="http://www.publishing.org"
> xsi:schemaLocation="http://www.publishing.org idc001.nogen.xsd">
> <Book>
> <Title>My Life and Times</Title>
> <Author>Paul McCartney</Author>
> <ISBN>43892</ISBN>
> <Publisher>McMillin Publishing</Publisher>
> <Date>1998</Date>
> </Book>
> <Book>
> <Title>My Life and Times</Title>
> <Author>Paul McCartney</Author>
> <ISBN>43892</ISBN>
> <Publisher>McMillin Publishing</Publisher>
> <Date>1998</Date>
> </Book>
> </BookCatalogue>
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[jira] Closed: (XERCESC-1516) identity constraint volation not caught when xpath contains default namespace
Posted by "Gareth Reakes (JIRA)" <xe...@xml.apache.org>.
[ http://issues.apache.org/jira/browse/XERCESC-1516?page=all ]
Gareth Reakes closed XERCESC-1516:
----------------------------------
Resolution: Invalid
Agreed David. Andrew, feel free to mail the users list if you would like any more explanation.
Gareth
> identity constraint volation not caught when xpath contains default namespace
> -----------------------------------------------------------------------------
>
> Key: XERCESC-1516
> URL: http://issues.apache.org/jira/browse/XERCESC-1516
> Project: Xerces-C++
> Type: Bug
> Components: Validating Parser (Schema) (Xerces 1.5 or up only)
> Versions: 2.6.0
> Environment: Windows XP
> Reporter: Andrew Fang
>
> The following schema contains an identity constraint on the uniqueness of ISBN number. However, no error is reported when duplicated entries for ISBN exist. The problem seem to be that XPath parser does not parse default namespace correctly. If a prefix is added (xmlns:x="....") and use the prefix in xpath expression (e.g. <xsd:selector xpath="x:Book"/> ...), the violation is found.
> The following is a possible fix for the problem:
> in XercesXpath.cpp ln 510 and 585, change
> if (scopeContext && !aToken == -1) {
> prefix = stringPool->getValueForId(aToken);
> uri = scopeContext->getNamespaceForPrefix(prefix);
> }
> to
> if (scopeContext) {
> if(aToken == -1) { // no prefix, must be default namespace
> prefix = XMLUni::fgZeroLenString;
> } else {
> prefix = stringPool->getValueForId(aToken);
> }
> uri = scopeContext->getNamespaceForPrefix(prefix);
> }
> ------- Schema ---------------
> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
> targetNamespace="http://www.publishing.org"
> xmlns="http://www.publishing.org"
> elementFormDefault="qualified">
> <xsd:element name="BookCatalogue">
> <xsd:complexType>
> <xsd:sequence>
> <xsd:element name="Book" minOccurs="1" maxOccurs="unbounded">
> <xsd:complexType>
> <xsd:sequence>
> <xsd:element name="Title" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Author" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="ISBN" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Publisher" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> <xsd:element name="Date" type="xsd:string" minOccurs="1" maxOccurs="1"/>
> </xsd:sequence>
> </xsd:complexType>
> </xsd:element>
> </xsd:sequence>
> </xsd:complexType>
> <xsd:unique name="ISBNnumber">
> <xsd:selector xpath="Book"/>
> <xsd:field xpath="ISBN"/>
> </xsd:unique>
> </xsd:element>
> </xsd:schema>
> --------- xml instance -----------
> <?xml version="1.0" encoding="UTF-8"?>
> <BookCatalogue
> xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
> xmlns="http://www.publishing.org"
> xsi:schemaLocation="http://www.publishing.org idc001.nogen.xsd">
> <Book>
> <Title>My Life and Times</Title>
> <Author>Paul McCartney</Author>
> <ISBN>43892</ISBN>
> <Publisher>McMillin Publishing</Publisher>
> <Date>1998</Date>
> </Book>
> <Book>
> <Title>My Life and Times</Title>
> <Author>Paul McCartney</Author>
> <ISBN>43892</ISBN>
> <Publisher>McMillin Publishing</Publisher>
> <Date>1998</Date>
> </Book>
> </BookCatalogue>
--
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