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/**
 * Copyright (C) 2010-2018 Gordon Fraser, Andrea Arcuri and EvoSuite
 * contributors
 *
 * This file is part of EvoSuite.
 *
 * EvoSuite is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published
 * by the Free Software Foundation, either version 3.0 of the License, or
 * (at your option) any later version.
 *
 * EvoSuite 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
 * Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with EvoSuite. If not, see .
 */
package org.evosuite.symbolic.expr;

import java.io.Serializable;
import java.util.Set;

public abstract interface Expression extends Serializable {

	/**
	 * 
	 * getParent
	 * 
	 * 
	 * @param 
	 *            a T object.
	 * @return a {@link org.evosuite.symbolic.expr.Expression} object.
	 */
	public Expression getParent();

	/**
	 * 
	 * setParent
	 * 
	 * 
	 * @param expr
	 *            a {@link org.evosuite.symbolic.expr.Expression} object.
	 */
	public void setParent(Expression expr);

	/**
	 * 
	 * getConcreteValue
	 * 
	 * 
	 * @return a {@link java.lang.Object} object.
	 */
	public T getConcreteValue();

	/**
	 * 
	 * getSize
	 * 
	 * 
	 * @return a int.
	 */
	public int getSize();

	/**
	 * Returns true iif
	 */
	public boolean containsSymbolicVariable();

	public Set> getVariables();

	public Set