package org.simantics.datatypes.utils;

import org.simantics.databoard.annotations.Optional;
import org.simantics.db.Resource;
import org.simantics.db.exception.DatabaseException;
import org.simantics.db.service.SerialisationSupport;

final class PossibleResource {
	
	@Optional
	public Resource r;
	
	public long longValue() {
		if(r == null) return 0L;
		return r.getResourceId();
	}

	public static PossibleResource read(SerialisationSupport ss, long l) throws DatabaseException {
		PossibleResource pr = new PossibleResource();
		if(l != 0) pr.r = ss.getResource(l); 
		return pr;
	}
	
}