Variable.java

/**
  * This program (working title: MAS Prover) is an automated tableaux prover
  * for epistemic logic (S5n).
  * Copyright (C) 2007  Elske van der Vaart and Gert van Valkenhoef

  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation.

  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.

  * You should have received a copy of the GNU General Public License along
  * with this program; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */

package nl.rug.ai.mas.oops.formula;

import java.util.*;

public class Variable<T> {
	private String d_name;
	private Vector<VariableReference<T>> d_refs;
	
	public Variable(String name) {
		d_name = name;
		d_refs = new Vector<VariableReference<T>>();
	}

	public void add(VariableReference<T> r) {
		d_refs.add(r);
	}

	public void remove(VariableReference<T> r) {
		d_refs.remove(r);
	}

	public void merge(Variable<T> other) {
		for (VariableReference<T> r : other.d_refs)
			r.set(this);
	}

	public String getName() {
		return d_name;
	}

	public String toString() {
		return d_name;
	}

	public boolean equals(Object other) {
		return other == this;
	}
}