net.ontopia.xml
Class SAXTracker

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      net.ontopia.xml.SAXTracker

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

Direct Known Subclasses:

ActionConfigContentHandler, NavigatorConfigurationContentHandler, PluginContentHandler, RelationMapping

public abstract class SAXTracker
extends org.xml.sax.helpers.DefaultHandler

INTERNAL: A helper base class for SAX applications that makes it much easier to write SAX applications, since it helps applications keep track of the element stack and preserve the contents of various elements.

Field Summary

protected StringBuffer	content The contents of the current element, or null if not instructed to keep the contents of the current element.
protected Set	keepContentsOf
protected Locator	locator
protected Stack	openElements The stack of currently open elements.

Constructor Summary

SAXTracker()

Method Summary

void	characters(char[] chars, int start, int length)
void	endElement(String nsuri, String lname, String qname)
boolean	isParent(String localName) INTERNAL: Returns true if the parent element has the given name.
void	keepContentsOf(String elementName) INTERNAL: Instructs the tracker to keep the contents of all elements with the given name.
void	setDocumentLocator(Locator locator)
void	startElement(String nsuri, String lname, String qname, Attributes attrs)

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endDocument, endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, skippedEntity, startDocument, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

keepContentsOf

protected Set keepContentsOf

locator

protected Locator locator

content

protected StringBuffer content

The contents of the current element, or null if not instructed to keep the contents of the current element.

openElements

protected Stack openElements

The stack of currently open elements.

Constructor Detail

SAXTracker

public SAXTracker()

Method Detail

keepContentsOf

public void keepContentsOf(String elementName)

INTERNAL: Instructs the tracker to keep the contents of all elements with the given name.

isParent

public boolean isParent(String localName)

INTERNAL: Returns true if the parent element has the given name.

startElement

public void startElement(String nsuri,
                         String lname,
                         String qname,
                         Attributes attrs)
                  throws SAXException

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class org.xml.sax.helpers.DefaultHandler

Throws:

SAXException

characters

public void characters(char[] chars,
                       int start,
                       int length)

Specified by:

characters in interface ContentHandler

Overrides:

characters in class org.xml.sax.helpers.DefaultHandler

endElement

public void endElement(String nsuri,
                       String lname,
                       String qname)
                throws SAXException

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class org.xml.sax.helpers.DefaultHandler

Throws:

SAXException

setDocumentLocator

public void setDocumentLocator(Locator locator)

Specified by:

setDocumentLocator in interface ContentHandler

Overrides:

setDocumentLocator in class org.xml.sax.helpers.DefaultHandler