org.htmlparser.sax
public class XMLReader extends Object implements XMLReader
org.xml.sax.XMLReader reader = org.xml.sax.helpers.XMLReaderFactory.createXMLReader ("org.htmlparser.sax.XMLReader"); org.xml.sax.ContentHandler content = new MyContentHandler (); reader.setContentHandler (content); org.xml.sax.ErrorHandler errors = new MyErrorHandler (); reader.setErrorHandler (errors); reader.parse ("http://cbc.ca");
Field Summary | |
---|---|
protected ContentHandler | mContentHandler
The content callback object. |
protected DTDHandler | mDTDHandler
not implemented |
protected EntityResolver | mEntityResolver
not implemented |
protected ErrorHandler | mErrorHandler
The error handler object. |
protected boolean | mNameSpacePrefixes
Determines if namespace prefix handling is on. |
protected boolean | mNameSpaces
Determines if namespace handling is on.
|
protected Parser | mParser
The underlying DOM parser. |
protected String[] | mParts
Qualified name parts. |
protected NamespaceSupport | mSupport
Namspace utility object. |
Constructor Summary | |
---|---|
XMLReader()
Create an SAX parser. |
Method Summary | |
---|---|
protected void | doSAX(Node node)
Process nodes recursively on the DocumentHandler.
|
ContentHandler | getContentHandler()
Return the current content handler.
|
DTDHandler | getDTDHandler()
Return the current DTD handler.
|
EntityResolver | getEntityResolver()
Return the current entity resolver.
|
ErrorHandler | getErrorHandler()
Return the current error handler.
|
boolean | getFeature(String name)
Look up the value of a feature flag.
|
Object | getProperty(String name)
Look up the value of a property.
|
void | parse(InputSource input)
Parse an XML document.
|
void | parse(String systemId)
Parse an XML document from a system identifier (URI).
|
void | setContentHandler(ContentHandler handler)
Allow an application to register a content event handler.
|
void | setDTDHandler(DTDHandler handler)
Allow an application to register a DTD event handler.
|
void | setEntityResolver(EntityResolver resolver)
Allow an application to register an entity resolver.
|
void | setErrorHandler(ErrorHandler handler)
Allow an application to register an error event handler.
|
void | setFeature(String name, boolean value)
Set the value of a feature flag.
|
void | setProperty(String name, Object value)
Set the value of a property.
|
See Also: mNameSpaces
http://xml.org/sax/features/namespaces
-
a value of "true" indicates namespace URIs and unprefixed
local names for element and attribute names will be availablehttp://xml.org/sax/features/namespace-prefixes
-
a value of "true" indicates that XML qualified names (with
prefixes) and attributes (including xmlns* attributes) will
be available.
Parameters: node The htmlparser node to traverse.
Throws: ParserException If a parse error occurs. SAXException If a SAX error occurs.
Returns: The current content handler, or null if none has been registered.
See Also: XMLReader
Returns: The current DTD handler, or null if none has been registered.
See Also: XMLReader
Returns: The current entity resolver, or null if none has been registered.
See Also: XMLReader
Returns: The current error handler, or null if none has been registered.
See Also: XMLReader
The feature name is any fully-qualified URI. It is possible for an XMLReader to recognize a feature name but temporarily be unable to return its value. Some feature values may be available only in specific contexts, such as before, during, or after a parse. Also, some feature values may not be programmatically accessible. (In the case of an adapter for SAX1 {@link Parser}, there is no implementation-independent way to expose whether the underlying parser is performing validation, expanding external entities, and so forth.)
All XMLReaders are required to recognize the http://xml.org/sax/features/namespaces and the http://xml.org/sax/features/namespace-prefixes feature names.
Typical usage is something like this:
XMLReader r = new MySAXDriver(); // try to activate validation try { r.setFeature("http://xml.org/sax/features/validation", true); } catch (SAXException e) { System.err.println("Cannot activate validation."); } // register event handlers r.setContentHandler(new MyContentHandler()); r.setErrorHandler(new MyErrorHandler()); // parse the first document try { r.parse("http://www.foo.com/mydoc.xml"); } catch (IOException e) { System.err.println("I/O exception reading XML document"); } catch (SAXException e) { System.err.println("XML exception reading document."); }
Implementors are free (and encouraged) to invent their own features, using names built on their own URIs.
Parameters: name The feature name, which is a fully-qualified URI.
Returns: The current value of the feature (true or false).
Throws: org.xml.sax.SAXNotRecognizedException If the feature value can't be assigned or retrieved. org.xml.sax.SAXNotSupportedException When the XMLReader recognizes the feature name but cannot determine its value at this time.
See Also: XMLReader
The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but temporarily be unable to return its value. Some property values may be available only in specific contexts, such as before, during, or after a parse.
XMLReaders are not required to recognize any specific property names, though an initial core set is documented for SAX2.
Implementors are free (and encouraged) to invent their own properties, using names built on their own URIs.
Parameters: name The property name, which is a fully-qualified URI.
Returns: The current value of the property.
Throws: org.xml.sax.SAXNotRecognizedException If the property value can't be assigned or retrieved. org.xml.sax.SAXNotSupportedException When the XMLReader recognizes the property name but cannot determine its value at this time.
See Also: XMLReader
The application can use this method to instruct the XML reader to begin parsing an XML document from any valid input source (a character stream, a byte stream, or a URI).
Applications may not invoke this method while a parse is in progress (they should create a new XMLReader instead for each nested XML document). Once a parse is complete, an application may reuse the same XMLReader object, possibly with a different input source. Configuration of the XMLReader object (such as handler bindings and values established for feature flags and properties) is unchanged by completion of a parse, unless the definition of that aspect of the configuration explicitly specifies other behavior. (For example, feature flags or properties exposing characteristics of the document being parsed.)
During the parse, the XMLReader will provide information about the XML document through the registered event handlers.
This method is synchronous: it will not return until parsing has ended. If a client application wants to terminate parsing early, it should throw an exception.
Parameters: input The input source for the top-level of the XML document.
Throws: org.xml.sax.SAXException Any SAX exception, possibly wrapping another exception. java.io.IOException An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.
See Also: org.xml.sax.InputSource XMLReader XMLReader XMLReader XMLReader XMLReader
This method is a shortcut for the common case of reading a document from a system identifier. It is the exact equivalent of the following:
parse(new InputSource(systemId));
If the system identifier is a URL, it must be fully resolved by the application before it is passed to the parser.
Parameters: systemId The system identifier (URI).
Throws: org.xml.sax.SAXException Any SAX exception, possibly wrapping another exception. java.io.IOException An IO exception from the parser, possibly from a byte stream or character stream supplied by the application.
See Also: parse
If the application does not register a content handler, all content events reported by the SAX parser will be silently ignored.
Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.
Parameters: handler The content handler.
See Also: XMLReader
If the application does not register a DTD handler, all DTD events reported by the SAX parser will be silently ignored.
Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.
Parameters: handler The DTD handler.
See Also: XMLReader
If the application does not register an entity resolver, the XMLReader will perform its own default resolution.
Applications may register a new or different resolver in the middle of a parse, and the SAX parser must begin using the new resolver immediately.
Parameters: resolver The entity resolver.
See Also: XMLReader
If the application does not register an error handler, all error events reported by the SAX parser will be silently ignored; however, normal processing may not continue. It is highly recommended that all SAX applications implement an error handler to avoid unexpected bugs.
Applications may register a new or different handler in the middle of a parse, and the SAX parser must begin using the new handler immediately.
Parameters: handler The error handler.
See Also: XMLReader
The feature name is any fully-qualified URI. It is possible for an XMLReader to expose a feature value but to be unable to change the current value. Some feature values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.
All XMLReaders are required to support setting http://xml.org/sax/features/namespaces to true and http://xml.org/sax/features/namespace-prefixes to false.
Parameters: name The feature name, which is a fully-qualified URI. value The requested value of the feature (true or false).
Throws: org.xml.sax.SAXNotRecognizedException If the feature value can't be assigned or retrieved. org.xml.sax.SAXNotSupportedException When the XMLReader recognizes the feature name but cannot set the requested value.
See Also: XMLReader
The property name is any fully-qualified URI. It is possible for an XMLReader to recognize a property name but to be unable to change the current value. Some property values may be immutable or mutable only in specific contexts, such as before, during, or after a parse.
XMLReaders are not required to recognize setting any specific property names, though a core set is defined by SAX2.
This method is also the standard mechanism for setting extended handlers.
Parameters: name The property name, which is a fully-qualified URI. value The requested value for the property.
Throws: org.xml.sax.SAXNotRecognizedException If the property value can't be assigned or retrieved. org.xml.sax.SAXNotSupportedException When the XMLReader recognizes the property name but cannot set the requested value.
HTML Parser is an open source library released under LGPL. | |