SAXDocumentParser does not support custom encoding algorithms

Hi,

during construction, the AttributeHolder is initialized with empty
_registeredEncodingAlgorithms. Registering custom encoding algorithms later,
will not affect the AttributeHolder and thus prevents string serialization for
generic SAX string interfaces.

A workaround is to derive from SAXDocumentParser and override
setRegisteredEncodingAlgorithms, i.e:

public class X3DFIDocumentParser extends SAXDocumentParser {

@Override
public void setRegisteredEncodingAlgorithms(Map algorithms) {
super.setRegisteredEncodingAlgorithms(algorithms);
this._attributes = new AttributesHolder(this.getRegisteredEncodingAlgorithms());
}
}

Could also be the solution for this issue.

Best regards,
Kristian
#### Environment
Operating System: All
Platform: All
#### Affected Versions
[current]