import java.io.File;
import java.io.IOException;
import java.util.ArrayList;

public interface IGraph {
	public ArrayList<INode> getNodes();
	public void addNode(INode node) throws GraphAdditionException;
	public void addEdge(IEdge edge) throws GraphAdditionException;
	public boolean containsNode(INode node);
	public boolean containsEdge(IEdge edge);
	public int calculateInStrenghtOfNode(INode node) throws GraphQueryException;
	public int calculateOutStrenghtOfNode(INode node) throws GraphQueryException;
	public void exportDataFile(File file) throws IOException;
}