All Known Implementing Classes:
This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY. See http://www.saxproject.org for further information.
This is an optional extension handler for SAX2 to provide lexical information about an XML document, such as comments and CDATA section boundaries. XML readers are not required to recognize this handler, and it is not part of core-only SAX2 distributions.
The events in the lexical handler apply to the entire document, not just to the document element, and all lexical handler events must appear between the content handler's startDocument and endDocument events.
To set the LexicalHandler for an XML reader, use the
with the property name
and an object implementing this interface (or null) as the value.
If the reader does not report lexical events, it will throw a
when you attempt to register the handler.
SAX- 2.0 (extensions 1.0)
|Method from org.xml.sax.ext.LexicalHandler Summary:|
|comment, endCDATA, endDTD, endEntity, startCDATA, startDTD, startEntity|
|Method from org.xml.sax.ext.LexicalHandler Detail:|
abstract public void comment(char ch, int start, int length) throws SAXException
This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read). Comments in the DTD must be properly nested inside start/endDTD and start/endEntity events (if used).
abstract public void endCDATA() throws SAXException
abstract public void endDTD() throws SAXException
This method is intended to report the end of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.
abstract public void endEntity(String name) throws SAXException
abstract public void startCDATA() throws SAXException
The contents of the CDATA section will be reported through the regular characters event; this event is intended only to report the boundary.
abstract public void startDTD(String name, String publicId, String systemId) throws SAXException
This method is intended to report the beginning of the DOCTYPE declaration; if the document has no DOCTYPE declaration, this method will not be invoked.
All declarations reported through DTDHandler or DeclHandler events must appear between the startDTD and endDTD events. Declarations are assumed to belong to the internal DTD subset unless they appear between startEntity and endEntity events. Comments and processing instructions from the DTD should also be reported between the startDTD and endDTD events, in their original order of (logical) occurrence; they are not required to appear in their correct locations relative to DTDHandler or DeclHandler events, however.
Note that the start/endDTD events will appear within the start/endDocument events from ContentHandler and before the first startElement event.
abstract public void startEntity(String name) throws SAXException
The reporting of parameter entities (including
the external DTD subset) is optional, and SAX2 drivers that
report LexicalHandler events may not implement it; you can use the
General entities are reported with their regular names, parameter entities have '%' prepended to their names, and the external DTD subset has the pseudo-entity name "[dtd]".
When a SAX2 driver is providing these events, all other events must be properly nested within start/end entity events. There is no additional requirement that events from DeclHandler or DTDHandler be properly ordered.
Note that skipped entities will be reported through the skippedEntity event, which is part of the ContentHandler interface.
Because of the streaming event model that SAX uses, some entity boundaries cannot be reported under any circumstances:
These will be silently expanded, with no indication of where the original entity boundaries were.
Note also that the boundaries of character references (which are not really entities anyway) are not reported.
All start/endEntity events must be properly nested.