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/*
* Copyright Dept. of Mathematics & Computer Science Univ. Paris-Descartes
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software. You can use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty and the software's author, the holder of the
* economic rights, and the successive licensors have only limited
* liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading, using, modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean that it is complicated to manipulate, and that also
* therefore means that it is reserved for developers and experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and, more generally, to use and operate it in the
* same conditions as regards security.
*
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*/
package pddl4j.exp.fexp;
import pddl4j.EvaluationException;
import pddl4j.exp.term.Term;
import pddl4j.exp.term.TermID;
/**
* This class implements the numeric operation multiply of the pddl langage.
*
* @author Damien Pellier
* @version 1.0
*/
public final class BinaryMultiply extends BinaryOp {
/**
* The serial version id of the class.
*/
private static final long serialVersionUID = 7717661917841761928L;
/**
* Creates a new multiply numeric operation with two arguements.
*
* @param arg1 the first argument of the multiply operation. The arguement
* must be a not null reference.
* @param arg2 the second argument of the multiply operation. The arguement
* must be a not null reference.
*/
public BinaryMultiply(final Term arg1, final Term arg2) {
super(Op.MULTIPLY, arg1, arg2);
}
/**
* Return a deep copy of this binary operation.
*
* @return a deep copy of this binary operation.
* @see pddl4j.exp.term.Term#clone()
*/
public BinaryMultiply clone() {
return (BinaryMultiply) super.clone();
}
/**
* Evaluates this binary multiply arithmetic expression.
*
* @return the result of the evaluation.
* @throws EvaluationException if the function is not evaluable or if an
* arithmetic error occurs during the evaluation.
* @see pddl4j.exp.fexp.OpExp#isEvaluable()
*/
public Number evaluate() throws EvaluationException {
if (!this.isGround())
throw new EvaluationException("arithmetic function "
+ this.toString() + " not ground");
try {
Number arg1 = null;
if (this.getArg1().getTermID().equals(TermID.ARITHMETIC_FUNCTION)) {
OpExp func = (OpExp) this.getArg1();
arg1 = func.evaluate();
} else if (this.getArg1().getTermID().equals(TermID.NUMBER)) {
arg1 = (Number) this.getArg1();
} else {
throw new EvaluationException("arithmetic function "
+ this.toString() + ": argument " + this.getArg1()
+ " is not evaluable");
}
Number arg2 = null;
if (this.getArg2().getTermID().equals(TermID.ARITHMETIC_FUNCTION)) {
OpExp func = (OpExp) this.getArg2();
arg2 = func.evaluate();
} else if (this.getArg2().getTermID().equals(TermID.NUMBER)) {
arg2 = (Number) this.getArg2();
} else {
throw new EvaluationException("arithmetic function "
+ this.toString() + ": argument " + this.getArg2()
+ " is not evaluable");
}
return new Number(arg1.getValue() * arg2.getValue());
} catch (ArithmeticException e) {
throw new EvaluationException("arithmetic function "
+ this.toString() + ": " + e.getMessage(), e);
}
}
}
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