protected Layer doCreateFromCapabilities(OGCCapabilities caps, AVList parameters)
{
string serviceName = caps.getServiceInformation().getServiceName();
if (serviceName == null || !(serviceName.equalsIgnoreCase(OGCConstants.WMS_SERVICE_NAME) ||
serviceName.Contains("WMS")))
{
string message = Logging.getMessage("WMS.NotWMSService", serviceName != null ? serviceName : "null");
Logging.logger().severe(message);
throw new ArgumentException(message);
}
if (parameters == null)
{
parameters = new AVListImpl();
}
if (parameters.getStringValue(AVKey.LAYER_NAMES) == null)
{
// Use the first named layer since no other guidance given
List <WMSLayerCapabilities> namedLayers = ((WMSCapabilities)caps).getNamedLayers();
if (namedLayers == null || namedLayers.Count == 0 || namedLayers[0] == null)
{
String message = Logging.getMessage("WMS.NoLayersFound");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
parameters.setValue(AVKey.LAYER_NAMES, namedLayers[0].getName());
}
return(new WMSTiledImageLayer((WMSCapabilities)caps, parameters));
}
/**
* Implemented by subclasses to perform the actual object creation. This default implementation always returns
* null.
*
* @param caps the capabilities document.
* @param parameters a list of configuration properties. These properties override any specified in the capabilities
* document. The list should contain the {@link AVKey#LAYER_NAMES} property for services that define
* layers, indicating which named layers described in the capabilities document to create. If this
* argumet is null or contains no layers, the first named layer is used.
*
* @return the requested object.
*/
protected object doCreateFromCapabilities(OGCCapabilities caps, AVList parameters)
{
return(null);
}