1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
|
/*
* 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 n-arity arithmetic function multiply.
*
* @author Damien Pellier
* @version 1.0
*/
public final class NArityMultiply extends NArityOp {
/**
* The serial version id of the class.
*/
private static final long serialVersionUID = 2899553544531715200L;
/**
* Creates a new divide numeric function without arguments.
*/
public NArityMultiply() {
super(Op.MULTIPLY);
}
/**
* Return a deep copy of this function.
*
* @return a deep copy of this function.
* @see pddl4j.exp.term.Term#clone()
*/
public NArityMultiply clone() {
return (NArityMultiply) super.clone();
}
/**
* Evaluates this 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 {
double result = 1;
for (Term arg : this) {
if (arg.getTermID().equals(TermID.ARITHMETIC_FUNCTION)) {
OpExp func = (OpExp) arg;
result *= func.evaluate().getValue();
} else if (arg.getTermID().equals(TermID.NUMBER)) {
result *= ((Number) arg).getValue();
} else {
throw new EvaluationException("arithmetic function "
+ this.toString() + ": argument " + arg
+ " is not evaluable");
}
}
return new Number(result);
} catch (ArithmeticException e) {
throw new EvaluationException("arithmetic function "
+ this.toString() + ": " + e.getMessage(), e);
}
}
}
|
