/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2002-2008, Open Source Geospatial Foundation (OSGeo)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package org.geotools.xml.impl;
import org.eclipse.xsd.XSDElementDeclaration;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import javax.xml.namespace.QName;
/**
* Classes implementing this interface serve has handlers for elements in an
* instance document as it is parsed. The element handler interface is a subset of the {@link
* org.xml.sax.ContentHandler} interface.
*
* <p>The methods <code>startElement, characters, and endElement</code> are called in
* sequence as they are for normal sax content handlers.
* </p>
*
* <p>
* An element handler corresponds to a specific element in a schema. A handler
* must return a child handler for each valid child element of its corresponding
* element.
* </p>
*
* @see org.xml.sax.ContentHandler
*
* @author Justin Deoliveira,Refractions Research Inc.,jdeolive@refractions.net
*
*
*
* @source $URL$
*/
public interface ElementHandler extends Handler {
/**
* Callback on leading edge of an element.
*
* @param qName The qualified name of the element being handled.
* @param attributes The attributes of hte elmenent being handled.
*
* @throws SAXException Any xml errors that occur.
*
* @see org.xml.sax.ContentHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
void startElement(QName qName, Attributes attributes)
throws SAXException;
/**
* Callback when characters of an element are encountered.
*
* @param ch Array containing characters.
* @param start The starting index of the characters.
* @param length The number of characters.
*
* @throws SAXException Any xml errors.
*
* @see org.xml.sax.ContentHandler#characters(char[], int, int)
*/
void characters(char[] ch, int start, int length) throws SAXException;
/**
* Callback on trailing edge of element.
*
* @param qName The qualified name of the element being handled.
*
* @throws SAXException Any xml errors.
*
* @see org.xml.sax.ContentHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
*/
void endElement(QName qName) throws SAXException;
/**
* @return The declaration of hte element being handled.
*/
XSDElementDeclaration getElementDeclaration();
}