This package implements SAX2-specific transformation APIs. It provides classes which allow input from
ContentHandler events, and also classes that produce org.xml.sax.ContentHandler events. It also provides methods to set the input source as an
XMLReader, or to use a
InputSource as the source. It also allows the creation of a
XMLFilter, which enables transformations to "pull" from other transformations, and lets the transformer to be used polymorphically as an
TransformerHandler interface allows a transformation to be created from SAX2 parse events, which is a "push" model rather than the "pull" model that normally occurs for a transformation. Normal parse events are received through the
ContentHandler interface, lexical events such as startCDATA and endCDATA are received through the
LexicalHandler interface, and events that signal the start or end of disabling output escaping are received via
processingInstruction(String, String), with the target parameter being
PI_ENABLE_OUTPUT_ESCAPING. If parameters, output properties, or other features need to be set on the Transformer handler, a
Transformer reference will need to be obtained from
getTransformer(), and the methods invoked from that reference.
TemplatesHandler interface allows the creation of
Templates objects from SAX2 parse events. Once the
ContentHandler events are complete, the Templates object may be obtained from
getTemplates(). Note that
setSystemId(String) should normally be called in order to establish a base system ID from which relative URLs may be resolved.
newXMLFilter(Source) method allows the creation of a
XMLFilter, which encapsulates the SAX2 notion of a "pull" transformation. The following illustrates several transformations chained together. Each filter points to a parent
XMLReader, and the final transformation is caused by invoking
parse(String) on the final reader in the chain.
|TemplatesHandler||A SAX ContentHandler that may be used to process SAX parse events (parsing transformation instructions) into a Templates object.|
|TransformerHandler||A TransformerHandler listens for SAX ContentHandler parse events and transforms them to a Result.|