edu.ucsb.nceas.metacat.service

Class XMLNamespaceParser

java.lang.Object

org.xml.sax.helpers.DefaultHandler

edu.ucsb.nceas.metacat.service.XMLNamespaceParser

All Implemented Interfaces:

org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

public class XMLNamespaceParser
extends org.xml.sax.helpers.DefaultHandler

This class will parse the root element to figure out the namespace of the root element(we also call it the namespace of the element). If it doesn't have a namespace, but it does have an attribute of noNamespaceSchemaLocation at the root element, it will get the value as well.

Author:

tao

Constructor Summary

Constructors

Constructor and Description
XMLNamespaceParser(java.io.Reader xml) Constructor

Method Summary

Modifier and Type	Method and Description
java.lang.String	getNamespace() Get the namespace of the document (root element).
java.lang.String	getNoNamespaceSchemaLocation() Get the value of noNamespaceSchemaLocation of the document (root element).
void	parse() Parse the xml file
void	startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes atts) SAX Handler that is called at the start of each XML element

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

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

Methods inherited from class java.lang.Object

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

Constructor Detail

XMLNamespaceParser

public XMLNamespaceParser(java.io.Reader xml)
                   throws org.xml.sax.SAXException,
                          edu.ucsb.nceas.utilities.PropertyNotFoundException

Constructor

Parameters:

xml - the xml object which will be parsed

Throws:

org.xml.sax.SAXException

edu.ucsb.nceas.utilities.PropertyNotFoundException

Method Detail

parse

public void parse()
           throws org.xml.sax.SAXException,
                  java.io.IOException

Parse the xml file

Throws:

org.xml.sax.SAXException - if some sax related exception happens

java.io.IOException - if the schema content couldn't be found

startElement

public void startElement(java.lang.String uri,
                         java.lang.String localName,
                         java.lang.String qName,
                         org.xml.sax.Attributes atts)
                  throws org.xml.sax.SAXException

SAX Handler that is called at the start of each XML element

Specified by:

startElement in interface org.xml.sax.ContentHandler

Overrides:

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

Throws:

org.xml.sax.SAXException

getNamespace

public java.lang.String getNamespace()

Get the namespace of the document (root element). The parse() method should be called first

Returns:

the value of the namespace. A null will be returned if it can't be found.

getNoNamespaceSchemaLocation

public java.lang.String getNoNamespaceSchemaLocation()

Get the value of noNamespaceSchemaLocation of the document (root element). The parse() method should be called first

Returns:

the value of the noNamespaceSchemaLocation. A null will be returned if it can't be found.