[XERCESJ-1470] enhancements to XML Schema 1.1 assertions run-time error messages

• Type: Improvement
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.10.0
• Fix Version/s: 2.11.0
• Component/s: XML Schema 1.1 Datatypes, XML Schema 1.1 Structures
• Assignee: Mukul Gandhi
• Reporter: Mukul Gandhi
• Created: 02/Nov/10 12:31
• Updated: 02/Nov/10 12:32
• Resolved: 02/Nov/10 12:32

Description

I committed sometime ago little enhancement to Xerces specific error messages during XML Schema 1.1 assertions evaluation failure (thought it would be ok to create a JIRA issue for this). Here are the summary of these changes (explained with a small example).

instance document [1]:

<x>101</x>

XML Schema 1.1 simpleType definition [2]:

<xs:simpleType>
<xs:restriction base="xs:integer" xmlns:xerces="http://xerces.apache.org">
<xs:assertion test="$value mod 2 = 0" xerces:message="The value must be divisible by 2. {$value} is not divisible by 2." />
</xs:restriction>
</xs:simpleType>

When the instance document [1] is validated by the simpleType [2] Xerces would now display an error message like following:

"The value must be divisible by 2. 101 is not divisible by 2."

At run-time the placeholder (a kind of little macro) {$value} will be replaced by corresponding value from instance document. The placeholder for this purpose must have a name {$value}. There can be multiple instances of these placeholders in single assertions message, and all-of them will be replaced by the value from instance document.