blob: 07172337d2f07d86e6f8771997f3cc6b825ee651 (
plain)
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
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
package bjc.rgens.newparser;
import bjc.utils.funcdata.FunctionalList;
import bjc.utils.funcdata.IList;
import java.util.Random;
/**
* A rule in a randomized grammar.
*
* @author EVE
*/
public class Rule {
/** The name of this grammar rule. */
public final String name;
/* The cases for this rule. */
private IList<RuleCase> cases;
/**
* Create a new grammar rule.
*
* @param ruleName
* The name of the grammar rule.
*
* @throws IllegalArgumentException
* If the rule name is invalid.
*/
public Rule(String ruleName) {
if (ruleName == null) {
throw new NullPointerException("Rule name must not be null");
} else if (ruleName.equals("")) {
throw new IllegalArgumentException("The empty string is not a valid rule name");
}
name = ruleName;
cases = new FunctionalList<>();
}
/**
* Adds a case to the rule.
*
* @param cse
* The case to add.
*/
public void addCase(RuleCase cse) {
if (cse == null) {
throw new NullPointerException("Case must not be null");
}
cases.add(cse);
}
/**
* Get a random case from this rule.
*
* @return
* A random case from this rule.
*/
public RuleCase getCase() {
return cases.randItem();
}
/**
* Get a random case from this rule.
*
* @param rnd
* The random number generator to use.
*
* @return
* A random case from this rule.
*/
public RuleCase getCase(Random rnd) {
return cases.randItem(rnd::nextInt);
}
/**
* Get all the cases of this rule.
*
* @return
* All the cases in this rule.
*/
public IList<RuleCase> getCases() {
return cases;
}
/**
* Replace the current list of cases with a new one.
*
* @param cases
* The new list of cases.
*/
public void replaceCases(IList<RuleCase> cases) {
this.cases = cases;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((cases == null) ? 0 : cases.hashCode());
result = prime * result + ((name == null) ? 0 : name.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj) return true;
if (obj == null) return false;
if (!(obj instanceof Rule)) return false;
Rule other = (Rule) obj;
if (cases == null) {
if (other.cases != null) return false;
} else if (!cases.equals(other.cases)) return false;
if (name == null) {
if (other.name != null) return false;
} else if (!name.equals(other.name)) return false;
return true;
}
@Override
public String toString() {
return String.format("Rule [ruleName='%s', ruleCases=%s]", name, cases);
}
}
|
