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Java > Open Source Codes > org > apache > derby > impl > drda > EbcdicCcsidManager


1 /*
2
3    Derby - Class org.apache.derby.impl.drda.EbcdicCcsidManager
4
5    Licensed to the Apache Software Foundation (ASF) under one or more
6    contributor license agreements. See the NOTICE file distributed with
7    this work for additional information regarding copyright ownership.
8    The ASF licenses this file to You under the Apache License, Version 2.0
9    (the "License"); you may not use this file except in compliance with
10    the License. You may obtain a copy of the License at
11
12       http://www.apache.org/licenses/LICENSE-2.0
13
14    Unless required by applicable law or agreed to in writing, software
15    distributed under the License is distributed on an "AS IS" BASIS,
16    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17    See the License for the specific language governing permissions and
18    limitations under the License.
19
20  */
21
22 package org.apache.derby.impl.drda;
23
24 /**
25  * A concrete implementation of a CcsidMgr used to convert
26  * between Java UCS2 and Ebcdic as needed to handle character
27  * DDM Parameters. This implementation only supports converting
28  * from the ASCII invariant of UNICODE to Ebcdic. This should
29  * be fine since this class is intended for converting
30  * DDM Parameter data only.
31  */
32 class EbcdicCcsidManager extends CcsidManager
33 {
34     private static final int[] conversionArrayToEbcdic = {
35         0x0000,0x0001,0x0002,0x0003,0x0037,0x002d,0x002e,0x002f
36         ,0x0016,0x0005,0x0025,0x000b,0x000c,0x000d,0x000e,0x000f
37         ,0x0010,0x0011,0x0012,0x0013,0x003c,0x003d,0x0032,0x0026
38         ,0x0018,0x0019,0x003f,0x0027,0x001c,0x001d,0x001e,0x001f
39         ,0x0040,0x004f,0x007f,0x007b,0x005b,0x006c,0x0050,0x007d
40         ,0x004d,0x005d,0x005c,0x004e,0x006b,0x0060,0x004b,0x0061
41         ,0x00f0,0x00f1,0x00f2,0x00f3,0x00f4,0x00f5,0x00f6,0x00f7
42         ,0x00f8,0x00f9,0x007a,0x005e,0x004c,0x007e,0x006e,0x006f
43         ,0x007c,0x00c1,0x00c2,0x00c3,0x00c4,0x00c5,0x00c6,0x00c7
44         ,0x00c8,0x00c9,0x00d1,0x00d2,0x00d3,0x00d4,0x00d5,0x00d6
45         ,0x00d7,0x00d8,0x00d9,0x00e2,0x00e3,0x00e4,0x00e5,0x00e6
46         ,0x00e7,0x00e8,0x00e9,0x004a,0x00e0,0x005a,0x005f,0x006d
47         ,0x0079,0x0081,0x0082,0x0083,0x0084,0x0085,0x0086,0x0087
48         ,0x0088,0x0089,0x0091,0x0092,0x0093,0x0094,0x0095,0x0096
49         ,0x0097,0x0098,0x0099,0x00a2,0x00a3,0x00a4,0x00a5,0x00a6
50         ,0x00a7,0x00a8,0x00a9,0x00c0,0x00bb,0x00d0,0x00a1,0x0007
51         ,0x0020,0x0021,0x0022,0x0023,0x0024,0x0015,0x0006,0x0017
52         ,0x0028,0x0029,0x002a,0x002b,0x002c,0x0009,0x000a,0x001b
53         ,0x0030,0x0031,0x001a,0x0033,0x0034,0x0035,0x0036,0x0008
54         ,0x0038,0x0039,0x003a,0x003b,0x0004,0x0014,0x003e,0x00ff
55         ,0x0041,0x00aa,0x00b0,0x00b1,0x009f,0x00b2,0x006a,0x00b5
56         ,0x00bd,0x00b4,0x009a,0x008a,0x00ba,0x00ca,0x00af,0x00bc
57         ,0x0090,0x008f,0x00ea,0x00fa,0x00be,0x00a0,0x00b6,0x00b3
58         ,0x009d,0x00da,0x009b,0x008b,0x00b7,0x00b8,0x00b9,0x00ab
59         ,0x0064,0x0065,0x0062,0x0066,0x0063,0x0067,0x009e,0x0068
60         ,0x0074,0x0071,0x0072,0x0073,0x0078,0x0075,0x0076,0x0077
61         ,0x00ac,0x0069,0x00ed,0x00ee,0x00eb,0x00ef,0x00ec,0x00bf
62         ,0x0080,0x00fd,0x00fe,0x00fb,0x00fc,0x00ad,0x00ae,0x0059
63         ,0x0044,0x0045,0x0042,0x0046,0x0043,0x0047,0x009c,0x0048
64         ,0x0054,0x0051,0x0052,0x0053,0x0058,0x0055,0x0056,0x0057
65         ,0x008c,0x0049,0x00cd,0x00ce,0x00cb,0x00cf,0x00cc,0x00e1
66         ,0x0070,0x00dd,0x00de,0x00db,0x00dc,0x008d,0x008e,0x00df
67     };
68
69     private static final int[] conversionArrayToUCS2 = {
70         0x0000,0x0001,0x0002,0x0003,0x009C,0x0009,0x0086,0x007F
71         ,0x0097,0x008D,0x008E,0x000B,0x000C,0x000D,0x000E,0x000F
72         ,0x0010,0x0011,0x0012,0x0013,0x009D,0x0085,0x0008,0x0087
73         ,0x0018,0x0019,0x0092,0x008F,0x001C,0x001D,0x001E,0x001F
74         ,0x0080,0x0081,0x0082,0x0083,0x0084,0x000A,0x0017,0x001B
75         ,0x0088,0x0089,0x008A,0x008B,0x008C,0x0005,0x0006,0x0007
76         ,0x0090,0x0091,0x0016,0x0093,0x0094,0x0095,0x0096,0x0004
77         ,0x0098,0x0099,0x009A,0x009B,0x0014,0x0015,0x009E,0x001A
78         ,0x0020,0x00A0,0x00E2,0x00E4,0x00E0,0x00E1,0x00E3,0x00E5
79         ,0x00E7,0x00F1,0x005B,0x002E,0x003C,0x0028,0x002B,0x0021
80         ,0x0026,0x00E9,0x00EA,0x00EB,0x00E8,0x00ED,0x00EE,0x00EF
81         ,0x00EC,0x00DF,0x005D,0x0024,0x002A,0x0029,0x003B,0x005E
82         ,0x002D,0x002F,0x00C2,0x00C4,0x00C0,0x00C1,0x00C3,0x00C5
83         ,0x00C7,0x00D1,0x00A6,0x002C,0x0025,0x005F,0x003E,0x003F
84         ,0x00F8,0x00C9,0x00CA,0x00CB,0x00C8,0x00CD,0x00CE,0x00CF
85         ,0x00CC,0x0060,0x003A,0x0023,0x0040,0x0027,0x003D,0x0022
86         ,0x00D8,0x0061,0x0062,0x0063,0x0064,0x0065,0x0066,0x0067
87         ,0x0068,0x0069,0x00AB,0x00BB,0x00F0,0x00FD,0x00FE,0x00B1
88         ,0x00B0,0x006A,0x006B,0x006C,0x006D,0x006E,0x006F,0x0070
89         ,0x0071,0x0072,0x00AA,0x00BA,0x00E6,0x00B8,0x00C6,0x00A4
90         ,0x00B5,0x007E,0x0073,0x0074,0x0075,0x0076,0x0077,0x0078
91         ,0x0079,0x007A,0x00A1,0x00BF,0x00D0,0x00DD,0x00DE,0x00AE
92         ,0x00A2,0x00A3,0x00A5,0x00B7,0x00A9,0x00A7,0x00B6,0x00BC
93         ,0x00BD,0x00BE,0x00AC,0x007C,0x00AF,0x00A8,0x00B4,0x00D7
94         ,0x007B,0x0041,0x0042,0x0043,0x0044,0x0045,0x0046,0x0047
95         ,0x0048,0x0049,0x00AD,0x00F4,0x00F6,0x00F2,0x00F3,0x00F5
96         ,0x007D,0x004A,0x004B,0x004C,0x004D,0x004E,0x004F,0x0050
97         ,0x0051,0x0052,0x00B9,0x00FB,0x00FC,0x00F9,0x00FA,0x00FF
98         ,0x005C,0x00F7,0x0053,0x0054,0x0055,0x0056,0x0057,0x0058
99         ,0x0059,0x005A,0x00B2,0x00D4,0x00D6,0x00D2,0x00D3,0x00D5
100         ,0x0030,0x0031,0x0032,0x0033,0x0034,0x0035,0x0036,0x0037
101         ,0x0038,0x0039,0x00B3,0x00DB,0x00DC,0x00D9,0x00DA,0x009F
102     };
103
104     EbcdicCcsidManager ()
105     {
106         super ((byte) 0x40, // 0x40 is the ebcdic space character
107 (byte) 0x4B,
108                new byte[] {
109         // '0', '1', '2', '3', '4',
110 (byte)0xf0,(byte)0xf1,(byte)0xf2,(byte)0xf3,(byte)0xf4,
111         // '5', '6', '7', '8', '9',
112 (byte)0xf5,(byte)0xf6,(byte)0xf7,(byte)0xf8,(byte)0xf9,
113         // 'A', 'B', 'C', 'D', 'E',
114 (byte)0xc1,(byte)0xc2,(byte)0xc3,(byte)0xc4,(byte)0xc5,
115         // 'F', 'G', 'H', 'I', 'J',
116 (byte)0xc6,(byte)0xc7,(byte)0xc8,(byte)0xc9,(byte)0xd1,
117         // 'K', 'L', 'M', 'N', 'O',
118 (byte)0xd2,(byte)0xd3,(byte)0xd4,(byte)0xd5,(byte)0xd6,
119         // 'P'
120 (byte)0xd7
121         }
122       );
123     }
124
125     byte[] convertFromUCS2 (String JavaDoc sourceString)
126     {
127         byte[] bytes = new byte[sourceString.length()];
128         convertFromUCS2 (sourceString, bytes, 0);
129         return bytes;
130     }
131
132     int convertFromUCS2 (String JavaDoc sourceString,
133                byte[] buffer,
134                int offset)
135     {
136         for (int i=0; i < sourceString.length(); i++) {
137             char c = sourceString.charAt (i);
138             if (c > 0xff)
139                 buffer[offset++] = (byte) 63; // what's this ???
140 else
141                 buffer[offset++] = (byte) (conversionArrayToEbcdic [c]); ;
142         }
143
144         return offset;
145     }
146
147     String JavaDoc convertToUCS2 (byte[] sourceBytes)
148     {
149         int i = 0;
150         char[] theChars = new char[sourceBytes.length];
151         int num = 0;
152
153         for (i=0; i < sourceBytes.length; i++) {
154             num = (sourceBytes[i] < 0) ? (sourceBytes[i] + 256) : sourceBytes[i];
155             theChars[i] = (char) conversionArrayToUCS2[num];
156         }
157
158         return new String JavaDoc (theChars);
159     }
160
161     String JavaDoc convertToUCS2 (byte[] sourceBytes, int offset, int numToConvert)
162     {
163         int i = 0,j = 0;
164         char[] theChars = new char[numToConvert];
165         int num = 0;
166
167         for (i = offset; i < (offset + numToConvert); i++) {
168             num = (sourceBytes[i] < 0 ) ? (sourceBytes[i] + 256) : sourceBytes[i];
169             theChars[j] = (char) conversionArrayToUCS2[num];
170             j++;
171         }
172         return new String JavaDoc (theChars);
173     }
174
175 }
176
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