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World Wind is a collection of components that interactively display 3D geographic information within Java applications or applets.
/*
* Copyright (C) 2012 United States Government as represented by the Administrator of the
* National Aeronautics and Space Administration.
* All Rights Reserved.
*/
package gov.nasa.worldwind.ogc.kml;
import gov.nasa.worldwind.event.Message;
import gov.nasa.worldwind.util.*;
/**
* @author tag
* @version $Id: KMLStyleUrl.java 1171 2013-02-11 21:45:02Z dcollins $
*/
public class KMLStyleUrl extends KMLAbstractObject
{
/**
* Construct an instance.
*
* @param namespaceURI the qualifying namespace URI. May be null to indicate no namespace qualification.
*/
public KMLStyleUrl(String namespaceURI)
{
super(namespaceURI);
}
/**
* Resolves a styleUrl to a style selector, which is either a style or style map.
*
* If the url refers to a remote resource and the resource has not been retrieved and cached locally, this method
* returns null and initiates a retrieval.
*
* @return the style or style map referred to by the style URL.
*/
public KMLAbstractStyleSelector resolveStyleUrl()
{
if (WWUtil.isEmpty(this.getCharacters()))
return null;
Object o = this.getRoot().resolveReference(this.getCharacters());
return o instanceof KMLAbstractStyleSelector ? (KMLAbstractStyleSelector) o : null;
}
@Override
public void applyChange(KMLAbstractObject sourceValues)
{
if (!(sourceValues instanceof KMLStyleUrl))
{
String message = Logging.getMessage("KML.InvalidElementType", sourceValues.getClass().getName());
Logging.logger().warning(message);
throw new IllegalArgumentException(message);
}
super.applyChange(sourceValues);
this.onChange(new Message(KMLAbstractObject.MSG_STYLE_CHANGED, this));
}
}