Module org.jpo

Package org.jpo.datamodel

Class SaxEventHandler

java.lang.Object

org.xml.sax.helpers.DefaultHandler

org.jpo.datamodel.SaxEventHandler

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class SaxEventHandler
extends DefaultHandler

A xml parser to load the collections.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	INDEX	constant

Constructor Summary

Constructors

Constructor	Description
SaxEventHandler(SortableDefaultMutableTreeNode startNode, LabelFrame loadProgressGui, StringBuilder lowresUrls)	Constructs the Sax XML parser

Method Summary

Modifier and Type	Method	Description
void	characters(char[] buf, int offset, int len)	method invoked by the parser when characters are read between tags.
void	endElement(String namespaceURI, String sName, String qName)	method that gets invoked by the parser when an end element is discovered; used here to go back to the parent group if a <group> tag is found.
static InputSource	getCollectionDtdInputSource()	Returns the collection.dtd definition as an InputSource.
InputSource	resolveEntity(String publicId, String systemId)	try to resolve where the file belongs
void	startElement(String namespaceURI, String lName, String qName, Attributes attrs)	method that gets invoked by the parser when a new element is discovered

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

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

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xml.sax.ContentHandler

declaration

Field Details

INDEX

public static final String INDEX

constant

See Also:

• Constant Field Values

Constructor Details

SaxEventHandler

public SaxEventHandler(SortableDefaultMutableTreeNode startNode,
 LabelFrame loadProgressGui,
 StringBuilder lowresUrls)

Constructs the Sax XML parser

Parameters:

startNode - The starting node

loadProgressGui - the progress GUI to update

lowresUrls - the lowresUrls to pick up on

Method Details

startElement

public void startElement(String namespaceURI,
 String lName,
 String qName,
 Attributes attrs)

method that gets invoked by the parser when a new element is discovered

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Parameters:

namespaceURI - Namespace

lName - local name

qName - qualified name

attrs - attributes

endElement

public void endElement(String namespaceURI,
 String sName,
 String qName)

method that gets invoked by the parser when an end element is discovered; used here to go back to the parent group if a <group> tag is found.

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class DefaultHandler

Parameters:

namespaceURI - the URI

sName - the simple name

qName - the qualified name

characters

public void characters(char[] buf,
 int offset,
 int len)

method invoked by the parser when characters are read between tags. The variable interpretChars is set so that the characters can be put in the right place

Specified by:

characters in interface ContentHandler

Overrides:

characters in class DefaultHandler

Parameters:

buf - The buffer

offset - Start offset

len - Length

resolveEntity

public InputSource resolveEntity(String publicId,
 String systemId)
                          throws IOException

try to resolve where the file belongs

Specified by:

resolveEntity in interface EntityResolver

Overrides:

resolveEntity in class DefaultHandler

Parameters:

publicId - public id

systemId - system id

Returns:

the dtd as an input source

Throws:

IOException

getCollectionDtdInputSource

public static InputSource getCollectionDtdInputSource()
                                               throws IOException

Returns the collection.dtd definition as an InputSource.

Returns:

The collection. dtd file

Throws:

IOException - If something went wrong