TermVariable.h

/* 
 * File:   TermVariable.h
 * 
 * Copyright 2012 Heinrich Schuchardt <xypron.glpk@gmx.de>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef TERMVARIABLE_H
#define TERMVARIABLE_H

#include "Term.h"
#include <string>
#include <vector>

class Problem;

class TermVariable : public Term {
    friend class Problem;
public:
    static TermVariable* create(Problem* problem, const std::string &name);
    Term* differentiate(TermVariable* variable) throw
    (ProblemMismatchException);
    bool less(const Term* term) const;
    const double getLowerBound();
    void setLowerBound(const double lowerBound);
    const int getVariableIndex();
    const std::string getName();
    const double getUpperBound();
    void setUpperBound(const double upperBound);
    std::string toString() const;
protected:
    double eval(
            const DoubleVector* variableValues,
            TermValueSet* termValues);
    void setVariableIndex(const int variableIndex);
    TermVariable(Problem* problem, const std::string &name);
    virtual ~TermVariable();
private:
    int variableIndex_;
    double lowerBound_;
    std::string name_;
    double upperBound_;
};

#endif  /* TERMVARIABLE_H */