Ability to obtain QName for xsi:type field, if set
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Key: XMLBEANS-418
URL: https://issues.apache.org/jira/browse/XMLBEANS-418
Project: XMLBeans
Issue Type: New Feature
Components: XmlObject
Affects Versions: TBD
Reporter: Wesley Leggette
Fix For: TBD
In my schema, I am allowing extensibility using the xsi:type attribute. To
faciliate code separation, I generally have schema components which define a
particular inherited type (generally by extension of a base type) for which
particular instances will be inserted into the document. These types have
generic properties that I want all code to be able to understand, and only
compile the schema into the more specific code which needs more information
about the type.
However, for both debugging, logging, and for using in Map keys I'd like easy
access to the QName defined in the xsi:type attribute even if that type is not
understood by the compiled schema.
I have implemented the following utility method to accomplish this:
---
public static QName getXsiType(final XmlObject object)
{
XmlCursor cursor = object.newCursor();
final String xsiType =
cursor.getAttributeText(new
QName("http://www.w3.org/2001/XMLSchema-instance";, "type"));
if (xsiType == null)
return null;
final String[] toks = xsiType.split(":");
String prefix;
String localName;
if (toks.length > 1)
{
prefix = toks[0];
localName = toks[1];
}
else
{
prefix = "";
localName = toks[0];
}
QName namespace = null;
cursor = object.newCursor();
do
{
cursor.toNextToken();
if (cursor.isNamespace() &&
cursor.getName().getLocalPart().equals(prefix))
namespace = cursor.getName();
} while (namespace == null && !cursor.isEnd());
// final String namespace = cursor.toNextAttribute()
// object.getDomNode().getAttributes().getNamedItem("xmlns:" +
prefix).getNodeValue();
// TODO: Obviously we don't support this too well here, we're borked
// if xmlns isn't defined directly on the node. We should probably
// be okay for the near future in any case.
if (namespace == null)
return new QName(localName);
else
return new QName(namespace.getNamespaceURI(), localName);
}
--
I would think this sort of information would be ideal to be added onto the
XmlObject base class.
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