XIncludeFilter

This is a SAX filter which resolves all XInclude include elements before passing them on to the client application. Currently this class has the following known deviation from the XInclude specification:

1. XPointer is not supported.

Furthermore, I would definitely use a new instance of this class for each document you want to process. I doubt it can be used successfully on multiple documents. Furthermore, I can virtually guarantee that this class is not thread safe. You have been warned.

Since this class is not designed to be subclassed, and since I have not yet considered how that might affect the methods herein or what other protected methods might be needed to support subclasses, I have declared this class final. I may remove this restriction later, though the use-case for subclassing is weak. This class is designed to have its functionality extended via a horizontal chain of filters, not a vertical hierarchy of sub and superclasses.

To use this class:

• Construct an XIncludeFilter object with a known base URL
• Pass the XMLReader object from which the raw document will be read to the setParent() method of this object.
• Pass your own ContentHandler object to the setContentHandler() method of this object. This is the object which will receive events from the parsed and included document.
• Optional: if you wish to receive comments, set your own LexicalHandler object as the value of this object's http://xml.org/sax/properties/lexical-handler property. Also make sure your LexicalHandler asks this object for the status of each comment using insideIncludeElement before doing anything with the comment.
• Pass the URL of the document to read to this object's parse() method

e.g.

val includer = new XIncludeFilter(base)
includer setParent parser
includer setContentHandler new SAXXIncluder(System.out)
includer parse args(i)

translated from Elliotte Rusty Harold's Java source.