package org.simantics.event.util;

import java.util.UUID;

import org.simantics.databoard.Bindings;
import org.simantics.db.Resource;
import org.simantics.db.WriteGraph;
import org.simantics.db.exception.DatabaseException;
import org.simantics.event.ontology.EventResource;
import org.simantics.layer0.Layer0;

public class EventUtils {

	public static final int MAX_EVENTS = 1000;
	public static final int SLICE_SIZE = 64;
	public static final int KEEPS_SLICES = (MAX_EVENTS / SLICE_SIZE) + 2;
	public static final String MAX_SLICE_NAME = "" + (SLICE_SIZE-1);

	public static Resource createLog(WriteGraph graph) throws DatabaseException {
		Layer0 L0 = Layer0.getInstance(graph);
		EventResource EVENT = EventResource.getInstance(graph);
        Resource log = graph.newResource();
        graph.claim(log, L0.InstanceOf, null, EVENT.EventLog);
        graph.claimLiteral(log, L0.HasName, UUID.randomUUID().toString(), Bindings.STRING);
        graph.claimLiteral(log, EVENT.HasModificationCounter, 0, Bindings.INTEGER);
        return log;
	}
	
}