Factory for creating various Stax objects (stream/event reader, writer).
Currently supported configuration options fall into two categories. First, all properties from {@link XMLInputFactory} (such as, say,{@link XMLInputFactory#IS_NAMESPACE_AWARE}) are at least recognized, and most are supported. Second, there are additional properties, defined in constant class {@link WstxInputProperties}, that are supported. See {@link WstxInputProperties} for further explanation of these 'custom'properties.
@author Tatu Saloranta