package jcircus.complementaryenvs;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Stack;
import java.util.Vector;

import jcircus.environment.NameTypeEnv;
public class MuStackEnv {
	private HashMap <String, Stack <NameTypeEnv>> map;
	public MuStackEnv () {
		this.map = new LinkedHashMap <String, Stack <NameTypeEnv>> ();
	}
	private Vector <String> keys () {
		Vector <String> keys = new Vector <String> ();
		Object [] objkeys = this.map.keySet().toArray();
		for (int i = 0; i < objkeys.length; i++) {
			keys.addElement((String) objkeys [i]);
		}
		return keys;
	}
	public void push (String muname, NameTypeEnv nte) {
		if (map.containsKey(muname)) {
			this.map.get(muname).push(nte);
		}
		else {
			Stack <NameTypeEnv> stack = new Stack <NameTypeEnv> ();
			stack.push(nte);
			this.map.put(muname, stack);
		}
		if (muname.equals("XActivateZone")) {
			System.out.print ("");
		}
	}
	public void pop (String muname) {
		if (map.containsKey(muname)) {
			this.map.get(muname).pop();
		}
		if (muname.equals("XActivateZone")) {
			System.out.print ("");
		}
	}
	public NameTypeEnv getCurrentNameTypeEnv (String muname) {
		if (this.map.get(muname).size() == 0) {
			System.out.print ("");
		}
		return this.map.get(muname).lastElement();
	}
}