Kapil Verma created XERCESJ-1664:
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Summary: Validation of a DOM created on fly against schema
validator fails to recognize attributes
Key: XERCESJ-1664
URL: https://issues.apache.org/jira/browse/XERCESJ-1664
Project: Xerces2-J
Issue Type: Bug
Components: JAXP (javax.xml.validation)
Affects Versions: 2.11.0
Environment: Win7, java 1.8
Reporter: Kapil Verma
Trying to validate a DOM model which was created programmatically. Getting cvc
error for id attribute on a node:
cvc-complex-type.3.2.2: Attribute 'id' is not allowed to appear in element
'context'
It works fine if the model is serialized and parsed into Xerces. On debugging
it was found that when parsing the document, Xerces uses its own factory method
to create the attributes:
CoreDocumentImpl.createAttributeNS(String namespaceURI, String qualifiedName,
String localpart)
and creates an instance of AttrNSImpl.
Since this method is not expose via org.w3c.dom.Document API, external
applications can't use it to create the instances of AttrNSImpl. The available
API
Document .createAttributeNS(String namespaceURI, String qualifiedName)
calls a different constructor of AttrNSImpl which throws Exceptions if the
namespace is null or empty.
Because of that the external applications are forced to use
Document.createAttribute(String name) which creates instances of AttrImpl.
Now the problem with AttrImpl is that it returns null for all questions except
getNodeName(). The validator doesn't like that. In
DOMValidatorHelper.fillQName(QName toFill, Node node) the QName object is
initialized using this AttrImpl object. Since everything except the
node.getNodeName() returns null, the toFill object has only rawname populated.
All this has consequence in XmlSchemaValidator.processAttributes() at line
2982:
// it's not xmlns, and not xsi, then we need to find a decl for it
....
....
oneUse = (XSAttributeUseImpl) attrUses.item(i);
if (oneUse.fAttrDecl.fName == fTempQName.localpart
&& oneUse.fAttrDecl.fTargetNamespace == fTempQName.uri) {
currUse = oneUse;
break;
}
The check for oneUse.fAttrDecl.fName == fTempQName.localpart fails, because the
localpart in fTempQName was not populated by the
DOMValidatorHelper.processAttributes(). This results in error report at line
2998.
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