| Constructs a live GetLegendGraphicProducer.
An instance of this interface should exist for all legend producers which
want to take advantage of the dynamic plugin system. In addition to
implementing this interface GetLegendGraphic producers should have a
services file:
org.vfny.geoserver.responses.wms.GetLegendGraphicProducerSpi
The file should contain a single line which gives the full name of the
implementing class.
example:
e.g.
org.vfny.geoserver.responses.wms.GIFLegendGraphicProducerSpi
The factories are never called directly by client code, instead the
GeoTools' FactoryFinder class is used.
The following example shows how a user might obtain GetLegendGraphicProducer
capable of generating a legend graphic image in GIF format and send the
generated legend to a file:
GetLegendGraphicProducerSpi glf = null;
Iterator it = FactoryFinder.factories(GetLegendGraphicProducerSpi.class);
while (it.hasNext()) {
GetLegendGraphicProducerSpi tmpGlf = (GetLegendGraphicProducerSpi) it.next();
if (tmpGlf.canProduce("image/gif")) {
glf = tmpGlf;
break;
}
}
GetLegendGraphicProducer producer = glf.createLegendProducer("image/gif");
GetLegendGraphicRequest request = ...
producer.produceLegendGraphic(request);
OutputStream out = new FileOutputStream("/legend.gif");
producer.writeTo(out);
author:
Gabriel Roldan, Axios Engineering
version:
$Revision: 1.1 $ | 
