package policy.rule;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import foundation.server.ObjectCreator;

public class RuleMetas implements Iterable<RuleMeta> {

	private String buId;
	private List<RuleMeta> items;
	private RuleRuntimes runtimes;
	
	public RuleMetas(String buId) {
		this.buId = buId;
		this.items = new ArrayList<RuleMeta>();
	}

	public RuleRuntimes getCheckRuntimes() {
		if (runtimes != null) {
			return runtimes;
		}
		
		synchronized (this) {
			if (runtimes != null) {
				return runtimes;
			}
			
			runtimes = new RuleRuntimes();
			
			for (RuleMeta checkMeta: items) {
				String className = checkMeta.getClassName();
				
				try {
					RuleAction checker = ObjectCreator.create(className);
					checker.setMeta(checkMeta);
					
					runtimes.loadOneChecker(checker);
				}
				catch (Exception e) {
					e.printStackTrace();
				}
			}

			return runtimes;
		}
	}

	public void loadOne(RuleMeta checker) {
		items.add(checker);
	}

	public void clear() {
		runtimes = null;
		items.clear();
	}

	public String getBuId() {
		return buId;
	}

	@Override
	public Iterator<RuleMeta> iterator() {
		return items.iterator();
	}
	
}