ContextJXPathBindingBuilder provides a helper class for the Factory
implemented in JXPathBindingManager that helps construct the
actual ContextJXPathBinding out of the configuration in the
provided configElement which looks like:
<fb:context path="xpath expression">
<!-- in here come the nested child bindings on the sub-context -->
</fb:context>
The fb:context element can have an optional factory
attribute, whose value, if present, must be the name of a class extending
AbstractFactory. If this attribute is present,
an instance of the named class is registered with the JXPath context and can be used to
create an object corresponding to the path of the fb:context element
upon save, if needed.
buildBinding(Element bindingElm,
JXPathBindingManager.Assistant assistant)
Creates an instance of ContextJXPathBinding with the configured
path and nested child bindings from the declarations in the bindingElm