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
|
/*
* Copyright 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.zxing.common;
import java.util.Hashtable;
/**
* Encapsulates a Character Set ECI, according to "Extended Channel Interpretations" 5.3.1.1
* of ISO 18004.
*
* @author Sean Owen
*/
public final class CharacterSetECI extends ECI {
private static Hashtable VALUE_TO_ECI;
private static Hashtable NAME_TO_ECI;
private static void initialize() {
VALUE_TO_ECI = new Hashtable(29);
NAME_TO_ECI = new Hashtable(29);
// TODO figure out if these values are even right!
addCharacterSet(0, "Cp437");
addCharacterSet(1, new String[] {"ISO8859_1", "ISO-8859-1"});
addCharacterSet(2, "Cp437");
addCharacterSet(3, new String[] {"ISO8859_1", "ISO-8859-1"});
addCharacterSet(4, "ISO8859_2");
addCharacterSet(5, "ISO8859_3");
addCharacterSet(6, "ISO8859_4");
addCharacterSet(7, "ISO8859_5");
addCharacterSet(8, "ISO8859_6");
addCharacterSet(9, "ISO8859_7");
addCharacterSet(10, "ISO8859_8");
addCharacterSet(11, "ISO8859_9");
addCharacterSet(12, "ISO8859_10");
addCharacterSet(13, "ISO8859_11");
addCharacterSet(15, "ISO8859_13");
addCharacterSet(16, "ISO8859_14");
addCharacterSet(17, "ISO8859_15");
addCharacterSet(18, "ISO8859_16");
addCharacterSet(20, new String[] {"SJIS", "Shift_JIS"});
}
private final String encodingName;
private CharacterSetECI(int value, String encodingName) {
super(value);
this.encodingName = encodingName;
}
public String getEncodingName() {
return encodingName;
}
private static void addCharacterSet(int value, String encodingName) {
CharacterSetECI eci = new CharacterSetECI(value, encodingName);
VALUE_TO_ECI.put(new Integer(value), eci); // can't use valueOf
NAME_TO_ECI.put(encodingName, eci);
}
private static void addCharacterSet(int value, String[] encodingNames) {
CharacterSetECI eci = new CharacterSetECI(value, encodingNames[0]);
VALUE_TO_ECI.put(new Integer(value), eci); // can't use valueOf
for (int i = 0; i < encodingNames.length; i++) {
NAME_TO_ECI.put(encodingNames[i], eci);
}
}
/**
* @param value character set ECI value
* @return CharacterSetECI representing ECI of given value, or null if it is legal but
* unsupported
* @throws IllegalArgumentException if ECI value is invalid
*/
public static CharacterSetECI getCharacterSetECIByValue(int value) {
if (VALUE_TO_ECI == null) {
initialize();
}
if (value < 0 || value >= 900) {
throw new IllegalArgumentException("Bad ECI value: " + value);
}
return (CharacterSetECI) VALUE_TO_ECI.get(new Integer(value));
}
/**
* @param name character set ECI encoding name
* @return CharacterSetECI representing ECI for character encoding, or null if it is legal
* but unsupported
*/
public static CharacterSetECI getCharacterSetECIByName(String name) {
if (NAME_TO_ECI == null) {
initialize();
}
return (CharacterSetECI) NAME_TO_ECI.get(name);
}
}
|
