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1 package jfun.yan.xml;
2
3 import java.util.Set  ;
4
5 import jfun.util.StringUtils;
6
7 class StringPredicates{
8 private static final StringPredicate one = new StringPredicate(){
9 public boolean isString(String s){return true;}
10 public String toString(){return "true";}
11 };
12 private static final StringPredicate zero = new StringPredicate(){
13 public boolean isString(String s){return false;}
14 public String toString(){return "false";}
15 };
16 public static StringPredicate always(){
17 return one;
18 }
19 public static StringPredicate never(){
20 return zero;
21 }
22 public static StringPredicate startsWith(final String prefix){
23 return new StringPredicate(){
24 public boolean isString(String s){
25 return s.startsWith(prefix);
26 }
27 public String toString(){return prefix+"*";}
28 };
29 }
30 public static StringPredicate equals(final String target){
31 return new StringPredicate(){
32 public boolean isString(String s){
33 return target.equals(s);
34 }
35 public String toString(){return target;}
36 };
37 }
38 public static StringPredicate in(final Set set){
39 return new StringPredicate(){
40 public boolean isString(String s){
41 return set.contains(s);
42 }
43 public String toString(){return set.toString();}
44 };
45 }
46 public static StringPredicate and(final StringPredicate[] preds){
47 return new StringPredicate(){
48 public boolean isString(String s){
49 for(int i=0; i<preds.length; i++){
50 if(!preds[i].isString(s))
51 return false;
52 }
53 return true;
54 }
55 public String toString(){
56 return StringUtils.listArray("(","&&",")",preds);
57 }
58 };
59 }
60 public static StringPredicate or(final StringPredicate[] preds){
61 return new StringPredicate(){
62 public boolean isString(String s){
63 for(int i=0; i<preds.length; i++){
64 if(preds[i].isString(s))
65 return true;
66 }
67 return false;
68 }
69 public String toString(){
70 return StringUtils.listArray("(","||",")",preds);
71 }
72 };
73 }
74 public static StringPredicate not(final StringPredicate pred){
75 return new StringPredicate(){
76 public boolean isString(String s){
77 return !pred.isString(s);
78 }
79 public String toString(){
80 return "!"+pred;
81 }
82 };
83 }
84 }
85 |
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