/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2004-2008, 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.handlers.xsi;
import java.util.LinkedList;
import java.util.List;
import org.geotools.xml.XSIElementHandler;
import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.SAXNotRecognizedException;
/**
* UniqueHandler purpose.
*
* <p>
* represents a unique element. This class is not currently used except as a
* placeholder.
* </p>
* TODO used this class semantically
*
* @author dzwiers, Refractions Research, Inc. http://www.refractions.net
* @author $Author:$ (last modification)
* @source $URL$
* @version $Id$
*/
public class UniqueHandler extends XSIElementHandler {
/** 'unique' */
public final static String LOCALNAME = "unique";
private String id;
private String xpath;
private SelectorHandler selector;
private List fields;
/**
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return LOCALNAME.hashCode() * ((id == null) ? 1 : id.hashCode()) * ((xpath == null)
? 1 : xpath.hashCode()) * ((fields == null) ? 1 : fields.hashCode());
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandler(java.lang.String,
* java.lang.String)
*/
public XSIElementHandler getHandler(String namespaceURI, String localName)
throws SAXException {
if (SchemaHandler.namespaceURI.equalsIgnoreCase(namespaceURI)) {
// child types
//
// annotation
// field
if (FieldHandler.LOCALNAME.equalsIgnoreCase(localName)) {
if (fields == null) {
fields = new LinkedList();
}
FieldHandler fh = new FieldHandler();
fields.add(fh);
return fh;
}
// selector
if (SelectorHandler.LOCALNAME.equalsIgnoreCase(localName)) {
SelectorHandler sth = new SelectorHandler();
if (selector == null) {
selector = sth;
} else {
throw new SAXNotRecognizedException(LOCALNAME
+ " may only have one child.");
}
return sth;
}
}
return null;
}
/**
* @see org.geotools.xml.XSIElementHandler#startElement(java.lang.String,
* java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String namespaceURI, String localName,
Attributes atts){
id = atts.getValue("", "id");
if (id == null) {
id = atts.getValue(namespaceURI, "id");
}
xpath = atts.getValue("", "xpath");
if (xpath == null) {
xpath = atts.getValue(namespaceURI, "xpath");
}
}
/**
* @see org.geotools.xml.XSIElementHandler#getLocalName()
*/
public String getLocalName() {
return LOCALNAME;
}
/**
* DOCUMENT ME!
*
* @return the id attribute value
*/
public String getId() {
return id;
}
/**
* DOCUMENT ME!
*
* @return the xpath attribute value
*/
public String getXpath() {
return xpath;
}
/**
* DOCUMENT ME!
*
* @return List of FieldHandlers representing sub-elements
*/
public List getFields() {
return fields;
}
/**
* DOCUMENT ME!
*
* @return the selector sub-element
*/
public SelectorHandler getSelector() {
return selector;
}
/**
* @see org.geotools.xml.XSIElementHandler#getHandlerType()
*/
public int getHandlerType() {
return DEFAULT;
}
/**
* @see org.geotools.xml.XSIElementHandler#endElement(java.lang.String,
* java.lang.String)
*/
public void endElement(String namespaceURI, String localName){
// do nothing
}
}