AbstractMarshallers should do proper SAXSource handling [SWS-11]

[gregturn]

Arjen Poutsma opened SWS-11 and commented

AbstractMarshaller handles SAXSources by taking the InputSource out of it, and reading that like a regular stream. This is incorrect behavior.

Instead, we should take the XMLReader and InputSource provided by the SAXSource, get a ContentHandler from the marshalling framework, and use the reader to parse the inputsource with the contenthandler.

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Affects: 0.9