[ http://issues.apache.org/jira/browse/XERCESC-1239?page=all ]
Alberto Massari resolved XERCESC-1239:
--------------------------------------
Resolution: Fixed
Your patch is in SVN. Please verify.
Thanks,
Alberto
> Schema length validation error in unions
> ----------------------------------------
>
> Key: XERCESC-1239
> URL: http://issues.apache.org/jira/browse/XERCESC-1239
> Project: Xerces-C++
> Type: Bug
> Components: Validating Parser (Schema) (Xerces 1.5 or up only)
> Versions: 2.4.0, 2.5.0
> Environment: Tested on released Win32 execs and new 2.5.0 exec created with
> VC++ 7 on WinNT SP6a and Win XP SP1
> Reporter: Michael Windsor
> Attachments: Test.txt
>
> In certain circumstances, schema validation fails to correctly calculate the
> length of a string with & (and possibly other) elements in it. The
> following schema and XML produce the error in the Sax2Print example, although
> I first noticed the error when using Xerces as a validator from within
> Xalan-C, so it is unlikely to be a problem with this example only.
> Test.xml:
> =========
> <?xml version="1.0" encoding="UTF-8"?>
> <root xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:noNamespaceSchemaLocation="Test.xsd">
> <flibble>curiouser & curiouser&curiouser</flibble>
> </root>
> Test.xsd:
> =========
> <?xml version="1.0" encoding="UTF-8" ?>
> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
> elementFormDefault="qualified" attributeFormDefault="unqualified">
> <xs:element name="root">
> <xs:complexType>
> <xs:sequence>
> <xs:element name="flibble">
> <xs:simpleType>
> <xs:union
> memberTypes="TextString Null"/>
> </xs:simpleType>
> </xs:element>
> </xs:sequence>
> </xs:complexType>
> </xs:element>
> <xs:simpleType name="TextString">
> <xs:restriction base="xs:string">
> <xs:minLength value="1" />
> <xs:maxLength value="31" />
> </xs:restriction>
> </xs:simpleType>
> <xs:simpleType name="Null">
> <xs:restriction base="xs:string">
> <xs:length value="0" />
> </xs:restriction>
> </xs:simpleType>
> </xs:schema>
> Error message:
> ==============
> Error at file F:\My Documents\Mike\Visual Studio
> Projects\xerces-c-src_2_5_0\Build\Win32\VC7\Debug/Test.xml, line 3, char 60
> Message: Datatype error: Type:InvalidDatatypeValueException, Message:Value
> 'curiouser & curiouser &curiouser' does not match any member types (of the
> union) .
> There are a few things to note:
> + As you can see by counting the letters, the input string should fit the
> first member of the union but an extra space has been put in before the
> second ampersand.
> + I have not determined the exact pattern within the string that causes this,
> but it seems to require two ampersands and that the second not have a space
> before it
> + I do not know if this is restricted to & or is general to any other
> type of escape sequence or a combination thereof (since more than one appears
> to be necessary.
> + This only happens for a union. If the schema simply provides a straight
> restriction on the length of the string, there is no complaint from
> validation.
> + Running Sax2Print with -s (i.e. no validation) prints the input document
> with the string processed correctly (i.e. the correct number of characters).
> It is only when the validator is switched on that the extra space is
> produced. This is also the case from XSLT operations within Xalan: the
> validator complains but if switched off, the string is output correctly to
> the correct length.
> I have spent some time trying to figure out what is going on in order to
> produce a patch. I will continue to do so, but at the moment, I am not having
> much luck. If anyone else with a better understanding of the code wants to
> jump in and steal my thunder, I won't be at all offended.
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