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1 package gnu.xquery.util;
2 import java.io.*;
3
4 public class NamedCollator
5
6 extends java.text.Collator 
7
8 implements Externalizable
9 {
10
11 java.text.Collator collator;
12
13
14 String name;
15
16 public static final String UNICODE_CODEPOINT_COLLATION
17 = "http://www.w3.org/2005/xpath-functions/collation/codepoint";
18
19 public static NamedCollator make (String name)
20 {
21 NamedCollator coll = new NamedCollator();
22 coll.name = name;
23 coll.resolve();
24 return coll;
25 }
26
27 public String getName ()
28 {
29 return name;
30 }
31
32 public static NamedCollator find (String name)
33 {
34 return make(name);
35 }
36
37 public static final NamedCollator codepointCollation = new NamedCollator();
38 static { codepointCollation.name = UNICODE_CODEPOINT_COLLATION; }
39
40 public void resolve ()
41 {
42 if (name != null && ! name.equals(UNICODE_CODEPOINT_COLLATION))
43 {
44 throw new RuntimeException ("unknown collation: "+name);
46 }
47 }
48
49 public int compare (String str1, String str2)
50 {
51
52 if (collator != null)
53 return collator.compare(str1, str2);
54
55 return str1.compareTo(str2);
56 }
57
58
59 public java.text.CollationKey getCollationKey (String source)
60 {
61 return collator.getCollationKey(source);
62 }
63
64
65 public int hashCode ()
66 {
67
68 if (collator != null)
69 return collator.hashCode();
70
71 return 0;
72 }
73
74 public void writeExternal(ObjectOutput out) throws IOException
75 {
76 out.writeUTF(name);
77 }
78
79 public void readExternal(ObjectInput in)
80 throws IOException, ClassNotFoundException
81 {
82 name = in.readUTF();
83 resolve();
84 }
85 }
86 |
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