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
setProperty
method
with the property name
http://xml.org/sax/properties/lexical-handler
and an object implementing this interface (or null) as the value.
If the reader does not report lexical events, it will throw a
SAXNotRecognizedException
when you attempt to register the handler.
Modifier and Type | Method and Description |
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public void | comment(char[]
An array holding the characters in the comment. ch, int The starting position in the array. start, int The number of characters to use from the array. length)Report an XML comment anywhere in the document. |
public void | |
public void | |
public void | |
public void | |
public void | startDTD(String
The document type name. name, String The declared public identifier for the
external DTD subset, or null if none was declared. publicId, String The declared system identifier for the
external DTD subset, or null if none was declared.
(Note that this is not resolved against the document
base URI.) systemId)Report the start of DTD declarations, if any. |
public void | startEntity(String
The name of the entity. If it is a parameter
entity, the name will begin with '%', and if it is the
external DTD subset, it will be "[dtd]". name)Report the beginning of some internal and external XML entities. |
comment | back to summary |
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public void comment(char[] ch, int start, int length) throws SAXException Report an XML comment anywhere in the document. 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).
|
endCDATA | back to summary |
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public void endCDATA() throws SAXException Report the end of a CDATA section.
|
endDTD | back to summary |
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public void endDTD() throws SAXException Report the end of DTD declarations. 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.
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endEntity | back to summary |
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public void endEntity(String name) throws SAXException Report the end of an entity.
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startCDATA | back to summary |
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public void startCDATA() throws SAXException Report the start of a CDATA section. The contents of the CDATA section will be reported through
the regular
|
startDTD | back to summary |
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public void startDTD(String name, String publicId, String systemId) throws SAXException Report the start of DTD declarations, if any. 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
Note that the start/endDTD events will appear within
the start/endDocument events from ContentHandler and
before the first
|
startEntity | back to summary |
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public void startEntity(String name) throws SAXException Report the beginning of some internal and external XML entities. 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
Note that skipped entities will be reported through the
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.
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