November 2002
Intermediate to advanced
1120 pages
21h 2m
English
Content preview from Processing XML with Java™: A Guide to SAX, DOM, JDOM, JAXP, and TrAXBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Summary
SAX filters sit between a client application and a parser (XMLReader) and intercept calls from the client application to the parser. SAX filters are instances of implementations of the org.xml.sax.XMLFilter interface, a subinterface of XMLReader. Thus a SAX filter is also a parser, albeit one that receives its data from another XML parser rather than by directly reading an XML document.
The easiest way to write a SAX filter is to subclass org.xml.sax.helpers. XMLfilterImpl, which implements several interfaces including XMLFilter, ContentHandler, DTDHandler, and ErrorHandler. org.xml.sax.helpers.XMLFilterImpl intercepts calls in both directions, from the client to the parser and from the parser to the client. The default behavior of this ...
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