| Constructs a live GetMapProducer.
An instance of this interface should exist for all map producers which want
to take advantage of the dynamic plugin system. In addition to implementing
this interface GetMap producers should have a services file:
org.vfny.geoserver.responses.wms.GetMapProducerFactorySpi
The file should contain a single line which gives the full name of the
implementing class.
example:
e.g.
org.vfny.geoserver.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 GetMapProducer capable
of generating a map image in GIF format and send the generated legend to a
file:
WMSConfig config = getServletContext().getAttribute(WMSConfig.CONFIG_KEY);
GetMapProducerSpi gmpf = null;
Iterator it = FactoryFinder.factories(GeMapProducerFactorySpi.class);
while (it.hasNext()) {
GeMapProducerFactorySpi tmpGmpf = (GeMapProducerFactorySpi) it.next();
if (tmpGmpf.canProduce("image/gif")) {
gmpf = tmpGmpf;
break;
}
}
...
GetMapProducer producer = gmpf.createMapProducer("image/gif");
WMSMapContext ctx = ...
producer.produceMap(ctx);
OutputStream out = new FileOutputStream("/map.gif");
producer.writeTo(out);
author:
Gabriel Roldan, Axios Engineering
version:
$Id: GetMapProducerFactorySpi.java 6326 2007-03-15 18:36:40Z jdeolive $ | 
