de.pangaea.metadataportal.utils
Class SaxRule

java.lang.Object
  org.apache.commons.digester.Rule
      de.pangaea.metadataportal.utils.SaxRule

Direct Known Subclasses:

OAIMetadataSaxRule

public class SaxRule
extends org.apache.commons.digester.Rule

This class is used as a rule for included documents during Digester parsing. Whenever this element matches in Digester, begin/end will be called, that then puts all further SAX events to the specified SAX ContentHandler.

Author:

Uwe Schindler

Field Summary

protected ContentHandler	destContentHandler
protected Set<String>	excludeNamespaces

Fields inherited from class org.apache.commons.digester.Rule

digester, namespaceURI

Constructor Summary

SaxRule()
Default constructor

Method Summary

void	begin(String namespace, String name, Attributes attributes)
static SaxRule	emptyRule() Creates an empty "useless" SaxRule.
void	end(String namespace, String name)
protected void	finishDocument() Closes the tags created in initDocument().
ContentHandler	getContentHandler() return the current ContentHandler.
protected void	initDocument() Add some tags when document started.
void	setContentHandler(ContentHandler ch) Sets the SAX ContentHandler that gets all SAX Events after the startElement event.
void	setDigester(org.apache.commons.digester.Digester digester) Set the Digester with which this Rule is associated.
void	setExcludeNamespaces(Set<String> excludeNamespaces) Sets a Set<String> containing all Namespace URIs that should not be feed to the target ContentHandler on match.

Methods inherited from class org.apache.commons.digester.Rule

begin, body, body, end, finish, getDigester, getNamespaceURI, setNamespaceURI

Methods inherited from class java.lang.Object

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

Field Detail

destContentHandler

protected ContentHandler destContentHandler

See Also:

setContentHandler(org.xml.sax.ContentHandler)

excludeNamespaces

protected Set<String> excludeNamespaces

See Also:

setExcludeNamespaces(java.util.Set)

Constructor Detail

SaxRule

public SaxRule()

Default constructor

Method Detail

emptyRule

public static SaxRule emptyRule()

Creates an empty "useless" SaxRule. The pupose is to not throw an exception on known but ignored tags (optional with contents).

Returns:

an instance that does nothing by feeding all SAX events to an SAX DefaultHandler

setDigester

public void setDigester(org.apache.commons.digester.Digester digester)

Set the Digester with which this Rule is associated.

Overrides:

setDigester in class org.apache.commons.digester.Rule

Throws:

IllegalArgumentException - if digester is not an ExtendedDigester instance.

setContentHandler

public void setContentHandler(ContentHandler ch)

Sets the SAX ContentHandler that gets all SAX Events after the startElement event.

getContentHandler

public ContentHandler getContentHandler()

return the current ContentHandler.

setExcludeNamespaces

public void setExcludeNamespaces(Set<String> excludeNamespaces)

Sets a Set<String> containing all Namespace URIs that should not be feed to the target ContentHandler on match. Default (or setting to null) means no restriction: All namespace prefixes visible in the current context will be reported.

initDocument

protected void initDocument()
                     throws SAXException

Add some tags when document started. The default implementation does nothing. This method should be overwritten to feed some additional tags after the startDocument SAX event.

Throws:

SAXException

finishDocument

protected void finishDocument()
                       throws SAXException

Closes the tags created in initDocument(). The default implementation does nothing. This method should be overwritten to feed some ending tags before the endDocument SAX event.

Throws:

SAXException

begin

public void begin(String namespace,
                  String name,
                  Attributes attributes)
           throws Exception

Overrides:

begin in class org.apache.commons.digester.Rule

Throws:

Exception

end

public void end(String namespace,
                String name)
         throws Exception

Overrides:

end in class org.apache.commons.digester.Rule

Throws:

Exception