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/*
 * Copyright (c) 2013, SRI International
 * All rights reserved.
 * Licensed under the The BSD 3-Clause License;
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 * 
 * http://opensource.org/licenses/BSD-3-Clause
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * Neither the name of the aic-expresso nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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package com.sri.ai.grinder.sgdpllt.theory.linearrealarithmetic;

import com.google.common.annotations.Beta;
import com.sri.ai.expresso.api.Expression;
import com.sri.ai.grinder.sgdpllt.api.Context;
import com.sri.ai.grinder.sgdpllt.rewriter.api.Simplifier;

/**
 * A simplifier that rewrites numerical comparisons in linear real arithmetic
 * to equivalent ones in which terms are cancelled out and numerical expressions are summed together.
 * It requires the specific theory to be provided in order to know
 * what expressions are variables and literals in simplified expressions.
 *
 * @author braz
 *
 */
@Beta
public class LinearRealArithmeticSimplifier implements Simplifier {

	private LinearRealArithmeticTheory theory;
	
	public LinearRealArithmeticSimplifier(LinearRealArithmeticTheory theory) {
		super();
		this.theory = theory;
	}

	@Override
	public Expression applySimplifier(Expression expression, Context context) {
		Expression result = LinearRealArithmeticUtil.simplify(expression, theory, context);
		return result;
	}
}