[XERCESJ-1717] While using xsd xs:key having 'ref' attribute, a java.lang.NullPointerException is emitted

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.12.0
• Fix Version/s: 2.12.1
• Component/s: Samples, XML Schema 1.1 Structures
• Assignee: Mukul Gandhi
• Reporter: Mukul Gandhi
• Created: 12/Nov/19 06:31
• Updated: 26/Dec/19 10:34
• Resolved: 12/Nov/19 06:34

Description

XML Schema 1.1 has introduced the attribute 'ref' on xs:key, xs:unique and xs:keyref. While processing the following schema in XSD 1.0 mode with Xerces's XSD 1.1 processor, a java.lang.NullPointerException is emitted when the schema document is processed with Xerces sample jaxp.SourceValidator.

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">

     <xs:element name="X">
          <xs:complexType>
              <xs:sequence>
                  <xs:element name="a" type="xs:integer" maxOccurs="unbounded"/>
                  <xs:element name="b" type="xs:integer"/>
              </xs:sequence>
          </xs:complexType>
          <xs:key name="a_key">
               <xs:selector xpath="a"/>
               <xs:field xpath="."/>
          </xs:key>
       </xs:element>

       <xs:element name="Y">
            <xs:complexType>
                <xs:sequence>
                    <xs:element name="a" type="xs:integer" maxOccurs="unbounded"/>
                    <xs:element name="b" type="xs:integer"/>
                </xs:sequence>
            </xs:complexType>
            <xs:key ref="a_key"/>
       </xs:element>

</xs:schema>