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/**
* Layer factory (Singleton)
*
* @author ETSI / STF424
* @version $URL$
* $Id$
*
*/
package org.etsi.its.adapter.layers;
import java.lang.reflect.Constructor;
import java.util.Map;
import java.util.Stack;
import java.util.TreeMap;
import org.etsi.its.adapter.IManagementLayers;
import org.etsi.its.adapter.layers.test.BtpSourceLayer;
import org.etsi.its.adapter.layers.test.CamSourceLayer;
import org.etsi.its.adapter.layers.test.DebugLayer;
import org.etsi.its.adapter.layers.test.DenmSourceLayer;
import org.etsi.its.adapter.layers.test.Gn6SourceLayer;
import org.etsi.its.adapter.layers.test.GnSourceLayer;
import org.etsi.its.adapter.layers.test.LoopbackLayer;
/**
* Layer factory (Singleton)
*/
public class LayerFactory {
/**
* Unique instance of the factory
*/
private static LayerFactory instance = new LayerFactory();
/**
* List of the registered layer types
*/
protected Map<String, Class<? extends Layer>> layers = new TreeMap<String, Class<? extends Layer>>();
/**
* Private constructor (Singleton pattern)
*/
private LayerFactory() {
// Register the layers
layers.put("BTP", BtpLayer.class);
layers.put("GN", GnLayer.class);
layers.put("G5", G5Layer.class);
layers.put("ETH", EthernetLayer.class);
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layers.put("Loopback", LoopbackLayer.class);
layers.put("Debug", DebugLayer.class);
layers.put("CamSource", CamSourceLayer.class);
layers.put("DenmSource", DenmSourceLayer.class);
layers.put("GnSource", GnSourceLayer.class);
layers.put("BtpSource", BtpSourceLayer.class);
layers.put("Gn6Source", Gn6SourceLayer.class);
}
/**
* Gets the unique factory instance
* @return LayerFactory instance
*/
public static LayerFactory getInstance(){
return instance;
}
/**
* Creates a port of the desired type
* @param management Layer management instance
* @param layerName Name of the layer
* @param lowerStack Lower protocol stack
* @return Protocol port instance
*/
public Layer createLayer(IManagementLayers management, String layerName, Stack<String> lowerStack) {
Layer layer = null;
Class<?>[] ctorParams = {IManagementLayers.class, lowerStack.getClass()};
try {
Class<? extends Layer> cls = layers.get(layerName);
if (cls == null) {
throw new RuntimeException("No class registered under " + layerName);
}
Constructor<? extends Layer> ctor = cls.getConstructor(ctorParams);
layer = ctor.newInstance(management, lowerStack);
} catch (Exception ex) {
ex.printStackTrace();
}
return layer;
}
}