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1 package JSci.maths.symbolic;
2
3 import java.util.*;
4 import JSci.maths.*;
5 import JSci.maths.groups.*;
6 import JSci.maths.fields.*;
7
8
10 public class Constant extends Expression {
11 private final Member value;
12
13
16 public Constant(Member x) {
17 value=x;
18 }
19
20 public String  toString() {
21 return value.toString();
22 }
23
24 public Expression differentiate(Variable x) {
25 return new Constant(((AbelianGroup)getSet()).zero());
26 }
27
28 public Expression evaluate() {
29 return this;
30 }
31
32 protected int getPriority() {
33 String sv=value.toString();
34 if (
35 sv.indexOf("+")!=-1 ||
36 sv.indexOf("-")!=-1
37 ) return 0;
38 if (sv.indexOf("*")!=-1) return 10;
39 if (sv.indexOf("^")!=-1) return 15;
40 return 20;
41 }
42
43 public Object getSet() {
44 return value.getSet();
45 }
46
47 public Member getValue() { return value; }
48
49 public boolean equals(Object o) {
50 Object op;
51 if (o instanceof Constant) op=((Constant)o).getValue();
52 else op=o;
53 return (value.equals(op));
54 }
55
56 }
57
58
59
60
61 |
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