/protocols/ss7/map/map-impl/src/main/java/org/mobicents/protocols/ss7/map/GSMCharset.java

http://mobicents.googlecode.com/ · Java · 120 lines · 69 code · 15 blank · 36 comment · 0 complexity · 903fef9649ee85a5b0c25f7864035120 MD5 · raw file 

    

  1. /*
    2. 

  2.  * JBoss, Home of Professional Open Source
    3. 

  3.  * Copyright 2011, Red Hat, Inc. and individual contributors
    4. 

  4.  * by the @authors tag. See the copyright.txt in the distribution for a
    5. 

  5.  * full listing of individual contributors.
    6. 

  6.  *
    7. 

  7.  * This is free software; you can redistribute it and/or modify it
    8. 

  8.  * under the terms of the GNU Lesser General Public License as
    9. 

  9.  * published by the Free Software Foundation; either version 2.1 of
    10. 

  10.  * the License, or (at your option) any later version.
    11. 

  11.  *
    12. 

  12.  * This software is distributed in the hope that it will be useful,
    13. 

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
    14. 

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
    15. 

  15.  * Lesser General Public License for more details.
    16. 

  16.  *
    17. 

  17.  * You should have received a copy of the GNU Lesser General Public
    18. 

  18.  * License along with this software; if not, write to the Free
    19. 

  19.  * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
    20. 

  20.  * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
    21. 

  21.  */
    22. 

  22. 

  23. package org.mobicents.protocols.ss7.map;
    24. 

  24. 

  25. import java.nio.charset.Charset;
    26. 

  26. import java.nio.charset.CharsetDecoder;
    27. 

  27. import java.nio.charset.CharsetEncoder;
    28. 

  28. 

  29. /**
    30. 

  30.  * <p>
    31. 

  31.  * The encoding/decoding of 7 bits characters in USSD strings is used doing
    32. 

  32.  * GSMCharset.
    33. 

  33.  * </p>
    34. 

  34.  * <br/>
    35. 

  35.  * <p>
    36. 

  36.  * For further details look at GSM 03.38 Specs
    37. 

  37.  * </p>
    38. 

  38.  * 
    39. 

  39.  * @author amit bhayani
    40. 

  40.  * @author sergey vetyutnev
    41. 

  41.  * 
    42. 

  42.  */
    43. 

  43. public class GSMCharset extends Charset {
    44. 

  44. 

  45. 	protected static final float averageCharsPerByte = 8 / 7f;
    46. 

  46. 	protected static final float maxCharsPerByte = 2f;
    47. 

  47. 

  48. 	protected static final float averageBytesPerChar = 2f;
    49. 

  49. 	protected static final float maxBytesPerChar = 2f;
    50. 

  50. 

  51. 	protected static final int BUFFER_SIZE = 256;
    52. 

  52. 

  53. 	public static final byte ESCAPE = 0x1B;
    54. 

  54. 	
    55. 

  55. 	protected int[] mainTable; 
    56. 

  56. 	protected int[] extensionTable; 
    57. 

  57. 

  58. 	public GSMCharset(String canonicalName, String[] aliases) {
    59. 

  59. 		this(canonicalName, aliases, BYTE_TO_CHAR_DefaultAlphabet, BYTE_TO_CHAR_DefaultAlphabetExtentionTable);
    60. 

  60. 	}
    61. 

  61. 

  62. 	public GSMCharset(String canonicalName, String[] aliases, int[] mainTable, int[] extentionTable) {
    63. 

  63. 		super(canonicalName, aliases);
    64. 

  64. 		
    65. 

  65. 		this.mainTable = mainTable; 
    66. 

  66. 		this.extensionTable = extentionTable; 
    67. 

  67. 	}
    68. 

  68. 

  69. 	@Override
    70. 

  70. 	public boolean contains(Charset cs) {
    71. 

  71. 		return this.getClass().isInstance(cs);
    72. 

  72. 	}
    73. 

  73. 

  74. 	@Override
    75. 

  75. 	public CharsetDecoder newDecoder() {
    76. 

  76. 		return new GSMCharsetDecoder(this, averageCharsPerByte, maxCharsPerByte);
    77. 

  77. 	}
    78. 

  78. 

  79. 	@Override
    80. 

  80. 	public CharsetEncoder newEncoder() {
    81. 

  81. 		return new GSMCharsetEncoder(this, averageBytesPerChar, maxBytesPerChar);
    82. 

  82. 	}
    83. 

  83. 

  84. 	// Look at http://www.unicode.org/Public/MAPPINGS/ETSI/GSM0338.TXT
    85. 

  85. 	static final int[] BYTE_TO_CHAR_DefaultAlphabet = { 
    86. 

  86. 		0x0040, 0x00A3, 0x0024, 0x00A5, 0x00E8, 0x00E9, 0x00F9, 0x00EC, 
    87. 

  87. 		0x00F2, 0x00E7, 0x000A, 0x00D8, 0x00F8, 0x000D, 0x00C5, 0x00E5, 
    88. 

  88. 		0x0394, 0x005F, 0x03A6, 0x0393, 0x039B, 0x03A9, 0x03A0, 0x03A8, 
    89. 

  89. 		0x03A3, 0x0398, 0x039E, 0x00A0, 0x00C6, 0x00E6, 0x00DF, 0x00C9, 
    90. 

  90. 		0x0020, 0x0021, 0x0022, 0x0023, 0x00A4, 0x0025, 0x0026, 0x0027, 
    91. 

  91. 		0x0028, 0x0029, 0x002A, 0x002B, 0x002C, 0x002D, 0x002E, 0x002F, 
    92. 

  92. 		0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037, 
    93. 

  93. 		0x0038, 0x0039, 0x003A, 0x003B, 0x003C, 0x003D, 0x003E, 0x003F, 
    94. 

  94. 		0x00A1, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047, 
    95. 

  95. 		0x0048, 0x0049, 0x004A, 0x004B, 0x004C, 0x004D, 0x004E, 0x004F, 
    96. 

  96. 		0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057, 
    97. 

  97. 		0x0058, 0x0059, 0x005A, 0x00C4, 0x00D6, 0x00D1, 0x00DC, 0x00A7, 
    98. 

  98. 		0x00BF, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067, 
    99. 

  99. 		0x0068, 0x0069, 0x006A, 0x006B, 0x006C, 0x006D, 0x006E, 0x006F, 
    100. 

  100. 		0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077, 
    101. 

  101. 		0x0078, 0x0079, 0x007A, 0x00E4, 0x00F6, 0x00F1, 0x00FC, 0x00E0 };
    102. 

  102. 	static final int[] BYTE_TO_CHAR_DefaultAlphabetExtentionTable = { 
    103. 

  103. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    104. 

  104. 		0x0000, 0x0000, 0x000C, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    105. 

  105. 		0x0000, 0x0000, 0x0000, 0x0000, 0x005E, 0x0000, 0x0000, 0x0000, 
    106. 

  106. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    107. 

  107. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    108. 

  108. 		0x007B, 0x007D, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x005C, 
    109. 

  109. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    110. 

  110. 		0x0000, 0x0000, 0x0000, 0x0000, 0x005B, 0x007E, 0x005D, 0x0000, 
    111. 

  111. 		0x007C, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    112. 

  112. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    113. 

  113. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    114. 

  114. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    115. 

  115. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x20AC, 0x0000, 0x0000, 
    116. 

  116. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    117. 

  117. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    118. 

  118. 		0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 
    119. 

  119.    };
    120. 

  120. }
    121.