Update.

src/main/org/insa/algo/weakconnectivity/WeaklyConnectedComponentObserver.java

@@ -0,0 +1,38 @@
+package org.insa.algo.weakconnectivity;
+
+import java.util.ArrayList;
+
+import org.insa.algo.AbstractObserver;
+import org.insa.graph.Node;
+
+public abstract class WeaklyConnectedComponentObserver extends AbstractObserver {
+
+	/**
+	 * {@inheritDoc}
+	 */
+	protected WeaklyConnectedComponentObserver(boolean isGraphic) {
+		super(isGraphic);
+	}
+	
+	/**
+	 * Notify that the algorithm is entering a new component.
+	 * 
+	 * @param curNode Starting node for the component.
+	 */
+	public abstract void notifyStartComponent(Node curNode);
+	
+	/**
+	 * Notify that a new node has been found for the current component.
+	 * 
+	 * @param node New node found for the current component.
+	 */
+	public abstract void notifyNewNodeInComponent(Node node);
+	
+	/**
+	 * Notify that the algorithm has computed a new component.
+	 * 
+	 * @param nodes List of nodes in the component.
+	 */
+	public abstract void notifyEndComponent(ArrayList<Node> nodes);
+
+}