package foundation.data.rule.exists;

import foundation.data.entity.Entity;
import foundation.data.entity.EntitySet;
import foundation.data.object.DataObject;
import foundation.server.Initializer;

public class ExistsLoader extends Initializer {

	private static ExistsLoader instance;
	
	private ExistsLoader() {
	}
	
	public static synchronized ExistsLoader getInstance() {
		if (instance == null) {
			instance = new ExistsLoader();
		}
		
		return instance;
	}
	
	@Override
	public void startUp() throws Exception {
		load();
	}

	private void load() throws Exception {
		ExistsBucket existsBucket = ExistsBucket.getInstance();
		
		DataObject dataObject = DataObject.getInstance("sys_data_rule_exists");
		EntitySet entitySet = dataObject.getTableEntitySet();
		
		for (Entity entity: entitySet) {
			ExistsRule rule = new ExistsRule();
			rule.load(entity);
			
			existsBucket.loadOneRule(rule);
		}
	}

	@Override
	public void shutDown() throws Exception {
		
	}

}