1 /* |
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2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Oracle designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Oracle in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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22 * or visit www.oracle.com if you need additional information or have any |
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23 * questions. |
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24 */ |
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25 |
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26 package sun.nio.cs.ext; |
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27 |
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28 import java.util.Collections; |
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29 import java.util.ArrayList; |
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30 import java.util.HashMap; |
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31 import java.util.List; |
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32 import java.util.Map; |
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33 import java.nio.charset.*; |
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34 |
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35 final class CompoundTextSupport { |
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36 |
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37 private static final class ControlSequence { |
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38 |
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39 final int hash; |
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40 final byte[] escSequence; |
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41 final byte[] encoding; |
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42 |
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43 ControlSequence(byte[] escSequence) { |
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44 this(escSequence, null); |
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45 } |
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46 ControlSequence(byte[] escSequence, byte[] encoding) { |
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47 if (escSequence == null) { |
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48 throw new NullPointerException(); |
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49 } |
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50 |
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51 this.escSequence = escSequence; |
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52 this.encoding = encoding; |
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53 |
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54 int hash = 0; |
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55 int length = escSequence.length; |
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56 |
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57 for (int i = 0; i < escSequence.length; i++) { |
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58 hash += (((int)escSequence[i]) & 0xff) << (i % 4); |
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59 } |
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60 if (encoding != null) { |
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61 for (int i = 0; i < encoding.length; i++) { |
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62 hash += (((int)encoding[i]) & 0xff) << (i % 4); |
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63 } |
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64 length += 2 /* M L */ + encoding.length + 1 /* 0x02 */; |
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65 } |
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66 |
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67 this.hash = hash; |
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68 |
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69 if (MAX_CONTROL_SEQUENCE_LEN < length) { |
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70 MAX_CONTROL_SEQUENCE_LEN = length; |
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71 } |
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72 } |
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73 |
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74 public boolean equals(Object obj) { |
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75 if (this == obj) { |
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76 return true; |
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77 } |
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78 if (!(obj instanceof ControlSequence)) { |
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79 return false; |
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80 } |
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81 ControlSequence rhs = (ControlSequence)obj; |
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82 if (escSequence != rhs.escSequence) { |
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83 if (escSequence.length != rhs.escSequence.length) { |
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84 return false; |
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85 } |
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86 for (int i = 0; i < escSequence.length; i++) { |
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87 if (escSequence[i] != rhs.escSequence[i]) { |
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88 return false; |
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89 } |
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90 } |
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91 } |
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92 if (encoding != rhs.encoding) { |
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93 if (encoding == null || rhs.encoding == null || |
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94 encoding.length != rhs.encoding.length) |
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95 { |
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96 return false; |
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97 } |
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98 for (int i = 0; i < encoding.length; i++) { |
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99 if (encoding[i] != rhs.encoding[i]) { |
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100 return false; |
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101 } |
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102 } |
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103 } |
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104 return true; |
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105 } |
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106 |
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107 public int hashCode() { |
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108 return hash; |
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109 } |
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110 |
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111 ControlSequence concatenate(ControlSequence rhs) { |
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112 if (encoding != null) { |
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113 throw new IllegalArgumentException |
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114 ("cannot concatenate to a non-standard charset escape " + |
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115 "sequence"); |
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116 } |
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117 |
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118 int len = escSequence.length + rhs.escSequence.length; |
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119 byte[] newEscSequence = new byte[len]; |
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120 System.arraycopy(escSequence, 0, newEscSequence, 0, |
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121 escSequence.length); |
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122 System.arraycopy(rhs.escSequence, 0, newEscSequence, |
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123 escSequence.length, rhs.escSequence.length); |
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124 return new ControlSequence(newEscSequence, rhs.encoding); |
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125 } |
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126 } |
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127 |
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128 static int MAX_CONTROL_SEQUENCE_LEN; |
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129 |
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130 /** |
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131 * Maps a GL or GR escape sequence to an encoding. |
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132 */ |
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133 private static final Map<ControlSequence, String> sequenceToEncodingMap; |
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134 |
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135 /** |
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136 * Indicates whether a particular encoding wants the high bit turned on |
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137 * or off. |
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138 */ |
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139 private static final Map<ControlSequence, Boolean> highBitsMap; |
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140 |
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141 /** |
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142 * Maps an encoding to an escape sequence. Rather than manage two |
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143 * converters in CharToByteCOMPOUND_TEXT, we output escape sequences which |
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144 * modify both GL and GR if necessary. This makes the output slightly less |
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145 * efficient, but our code much simpler. |
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146 */ |
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147 private static final Map<String, ControlSequence> encodingToSequenceMap; |
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148 |
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149 /** |
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150 * The keys of 'encodingToSequenceMap', sorted in preferential order. |
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151 */ |
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152 private static final List<String> encodings; |
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153 |
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154 static { |
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155 HashMap<ControlSequence, String> tSequenceToEncodingMap = |
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156 new HashMap<>(33, 1.0f); |
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157 HashMap<ControlSequence, Boolean> tHighBitsMap = |
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158 new HashMap<>(31, 1.0f); |
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159 HashMap<String, ControlSequence> tEncodingToSequenceMap = |
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160 new HashMap<>(21, 1.0f); |
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161 ArrayList<String> tEncodings = new ArrayList<>(21); |
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162 |
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163 if (!(isEncodingSupported("US-ASCII") && |
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164 isEncodingSupported("ISO-8859-1"))) |
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165 { |
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166 throw new ExceptionInInitializerError |
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167 ("US-ASCII and ISO-8859-1 unsupported"); |
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168 } |
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169 |
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170 ControlSequence leftAscii = // high bit off, leave off |
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171 new ControlSequence(new byte[] { 0x1B, 0x28, 0x42 }); |
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172 tSequenceToEncodingMap.put(leftAscii, "US-ASCII"); |
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173 tHighBitsMap.put(leftAscii, Boolean.FALSE); |
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174 |
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175 { |
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176 ControlSequence rightAscii = // high bit on, turn off |
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177 new ControlSequence(new byte[] { 0x1B, 0x29, 0x42 }); |
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178 tSequenceToEncodingMap.put(rightAscii, "US-ASCII"); |
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179 tHighBitsMap.put(rightAscii, Boolean.FALSE); |
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180 } |
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181 |
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182 { |
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183 ControlSequence rightHalf = // high bit on, leave on |
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184 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x41 }); |
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185 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-1"); |
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186 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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187 |
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188 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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189 tEncodingToSequenceMap.put("ISO-8859-1", fullSet); |
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190 tEncodings.add("ISO-8859-1"); |
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191 } |
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192 if (isEncodingSupported("ISO-8859-2")) { |
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193 ControlSequence rightHalf = // high bit on, leave on |
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194 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x42 }); |
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195 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-2"); |
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196 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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197 |
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198 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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199 tEncodingToSequenceMap.put("ISO-8859-2", fullSet); |
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200 tEncodings.add("ISO-8859-2"); |
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201 } |
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202 if (isEncodingSupported("ISO-8859-3")) { |
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203 ControlSequence rightHalf = // high bit on, leave on |
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204 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x43 }); |
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205 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-3"); |
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206 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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207 |
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208 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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209 tEncodingToSequenceMap.put("ISO-8859-3", fullSet); |
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210 tEncodings.add("ISO-8859-3"); |
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211 } |
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212 if (isEncodingSupported("ISO-8859-4")) { |
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213 ControlSequence rightHalf = // high bit on, leave on |
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214 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x44 }); |
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215 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-4"); |
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216 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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217 |
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218 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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219 tEncodingToSequenceMap.put("ISO-8859-4", fullSet); |
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220 tEncodings.add("ISO-8859-4"); |
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221 } |
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222 if (isEncodingSupported("ISO-8859-5")) { |
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223 ControlSequence rightHalf = // high bit on, leave on |
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224 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x4C }); |
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225 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-5"); |
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226 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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227 |
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228 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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229 tEncodingToSequenceMap.put("ISO-8859-5", fullSet); |
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230 tEncodings.add("ISO-8859-5"); |
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231 } |
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232 if (isEncodingSupported("ISO-8859-6")) { |
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233 ControlSequence rightHalf = // high bit on, leave on |
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234 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x47 }); |
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235 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-6"); |
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236 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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237 |
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238 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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239 tEncodingToSequenceMap.put("ISO-8859-6", fullSet); |
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240 tEncodings.add("ISO-8859-6"); |
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241 } |
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242 if (isEncodingSupported("ISO-8859-7")) { |
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243 ControlSequence rightHalf = // high bit on, leave on |
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244 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x46 }); |
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245 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-7"); |
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246 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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247 |
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248 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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249 tEncodingToSequenceMap.put("ISO-8859-7", fullSet); |
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250 tEncodings.add("ISO-8859-7"); |
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251 } |
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252 if (isEncodingSupported("ISO-8859-8")) { |
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253 ControlSequence rightHalf = // high bit on, leave on |
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254 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x48 }); |
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255 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-8"); |
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256 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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257 |
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258 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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259 tEncodingToSequenceMap.put("ISO-8859-8", fullSet); |
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260 tEncodings.add("ISO-8859-8"); |
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261 } |
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262 if (isEncodingSupported("ISO-8859-9")) { |
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263 ControlSequence rightHalf = // high bit on, leave on |
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264 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x4D }); |
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265 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-9"); |
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266 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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267 |
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268 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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269 tEncodingToSequenceMap.put("ISO-8859-9", fullSet); |
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270 tEncodings.add("ISO-8859-9"); |
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271 } |
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272 if (isEncodingSupported("JIS_X0201")) { |
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273 ControlSequence glLeft = // high bit off, leave off |
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274 new ControlSequence(new byte[] { 0x1B, 0x28, 0x4A }); |
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275 ControlSequence glRight = // high bit off, turn on |
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276 new ControlSequence(new byte[] { 0x1B, 0x28, 0x49 }); |
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277 ControlSequence grLeft = // high bit on, turn off |
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278 new ControlSequence(new byte[] { 0x1B, 0x29, 0x4A }); |
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279 ControlSequence grRight = // high bit on, leave on |
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280 new ControlSequence(new byte[] { 0x1B, 0x29, 0x49 }); |
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281 tSequenceToEncodingMap.put(glLeft, "JIS_X0201"); |
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282 tSequenceToEncodingMap.put(glRight, "JIS_X0201"); |
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283 tSequenceToEncodingMap.put(grLeft, "JIS_X0201"); |
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284 tSequenceToEncodingMap.put(grRight, "JIS_X0201"); |
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285 tHighBitsMap.put(glLeft, Boolean.FALSE); |
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286 tHighBitsMap.put(glRight, Boolean.TRUE); |
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287 tHighBitsMap.put(grLeft, Boolean.FALSE); |
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288 tHighBitsMap.put(grRight, Boolean.TRUE); |
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289 |
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290 ControlSequence fullSet = glLeft.concatenate(grRight); |
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291 tEncodingToSequenceMap.put("JIS_X0201", fullSet); |
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292 tEncodings.add("JIS_X0201"); |
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293 } |
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294 if (isEncodingSupported("X11GB2312")) { |
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295 ControlSequence leftHalf = // high bit off, leave off |
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296 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x41 }); |
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297 ControlSequence rightHalf = // high bit on, turn off |
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298 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x41 }); |
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299 tSequenceToEncodingMap.put(leftHalf, "X11GB2312"); |
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300 tSequenceToEncodingMap.put(rightHalf, "X11GB2312"); |
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301 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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302 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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303 |
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304 tEncodingToSequenceMap.put("X11GB2312", leftHalf); |
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305 tEncodings.add("X11GB2312"); |
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306 } |
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307 if (isEncodingSupported("x-JIS0208")) { |
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308 ControlSequence leftHalf = // high bit off, leave off |
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309 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x42 }); |
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310 ControlSequence rightHalf = // high bit on, turn off |
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311 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x42 }); |
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312 tSequenceToEncodingMap.put(leftHalf, "x-JIS0208"); |
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313 tSequenceToEncodingMap.put(rightHalf, "x-JIS0208"); |
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314 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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315 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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316 |
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317 tEncodingToSequenceMap.put("x-JIS0208", leftHalf); |
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318 tEncodings.add("x-JIS0208"); |
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319 } |
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320 if (isEncodingSupported("X11KSC5601")) { |
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321 ControlSequence leftHalf = // high bit off, leave off |
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322 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x43 }); |
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323 ControlSequence rightHalf = // high bit on, turn off |
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324 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x43 }); |
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325 tSequenceToEncodingMap.put(leftHalf, "X11KSC5601"); |
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326 tSequenceToEncodingMap.put(rightHalf, "X11KSC5601"); |
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327 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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328 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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329 |
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330 tEncodingToSequenceMap.put("X11KSC5601", leftHalf); |
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331 tEncodings.add("X11KSC5601"); |
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332 } |
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333 |
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334 // Encodings not listed in Compound Text Encoding spec |
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335 |
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336 // Esc seq: -b |
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337 if (isEncodingSupported("ISO-8859-15")) { |
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338 ControlSequence rightHalf = // high bit on, leave on |
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339 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x62 }); |
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340 tSequenceToEncodingMap.put(rightHalf, "ISO-8859-15"); |
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341 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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342 |
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343 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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344 tEncodingToSequenceMap.put("ISO-8859-15", fullSet); |
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345 tEncodings.add("ISO-8859-15"); |
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346 } |
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347 // Esc seq: -T |
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348 if (isEncodingSupported("TIS-620")) { |
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349 ControlSequence rightHalf = // high bit on, leave on |
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350 new ControlSequence(new byte[] { 0x1B, 0x2D, 0x54 }); |
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351 tSequenceToEncodingMap.put(rightHalf, "TIS-620"); |
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352 tHighBitsMap.put(rightHalf, Boolean.TRUE); |
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353 |
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354 ControlSequence fullSet = leftAscii.concatenate(rightHalf); |
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355 tEncodingToSequenceMap.put("TIS-620", fullSet); |
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356 tEncodings.add("TIS-620"); |
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357 } |
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358 if (isEncodingSupported("JIS_X0212-1990")) { |
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359 ControlSequence leftHalf = // high bit off, leave off |
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360 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x44 }); |
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361 ControlSequence rightHalf = // high bit on, turn off |
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362 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x44 }); |
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363 tSequenceToEncodingMap.put(leftHalf, "JIS_X0212-1990"); |
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364 tSequenceToEncodingMap.put(rightHalf, "JIS_X0212-1990"); |
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365 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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366 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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367 |
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368 tEncodingToSequenceMap.put("JIS_X0212-1990", leftHalf); |
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369 tEncodings.add("JIS_X0212-1990"); |
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370 } |
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371 if (isEncodingSupported("X11CNS11643P1")) { |
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372 ControlSequence leftHalf = // high bit off, leave off |
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373 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x47 }); |
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374 ControlSequence rightHalf = // high bit on, turn off |
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375 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x47 }); |
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376 tSequenceToEncodingMap.put(leftHalf, "X11CNS11643P1"); |
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377 tSequenceToEncodingMap.put(rightHalf, "X11CNS11643P1"); |
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378 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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379 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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380 |
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381 tEncodingToSequenceMap.put("X11CNS11643P1", leftHalf); |
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382 tEncodings.add("X11CNS11643P1"); |
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383 } |
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384 if (isEncodingSupported("X11CNS11643P2")) { |
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385 ControlSequence leftHalf = // high bit off, leave off |
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386 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x48 }); |
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387 ControlSequence rightHalf = // high bit on, turn off |
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388 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x48 }); |
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389 tSequenceToEncodingMap.put(leftHalf, "X11CNS11643P2"); |
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390 tSequenceToEncodingMap.put(rightHalf, "X11CNS11643P2"); |
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391 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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392 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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393 |
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394 tEncodingToSequenceMap.put("X11CNS11643P2", leftHalf); |
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395 tEncodings.add("X11CNS11643P2"); |
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396 } |
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397 if (isEncodingSupported("X11CNS11643P3")) { |
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398 ControlSequence leftHalf = // high bit off, leave off |
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399 new ControlSequence(new byte[] { 0x1B, 0x24, 0x28, 0x49 }); |
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400 ControlSequence rightHalf = // high bit on, turn off |
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401 new ControlSequence(new byte[] { 0x1B, 0x24, 0x29, 0x49 }); |
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402 tSequenceToEncodingMap.put(leftHalf, "X11CNS11643P3"); |
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403 tSequenceToEncodingMap.put(rightHalf, "X11CNS11643P3"); |
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404 tHighBitsMap.put(leftHalf, Boolean.FALSE); |
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405 tHighBitsMap.put(rightHalf, Boolean.FALSE); |
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406 |
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407 tEncodingToSequenceMap.put("X11CNS11643P3", leftHalf); |
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408 tEncodings.add("X11CNS11643P3"); |
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409 } |
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410 // Esc seq: %/2??SUN-KSC5601.1992-3 |
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411 if (isEncodingSupported("x-Johab")) { |
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412 // 0x32 looks wrong. It's copied from the Sun X11 Compound Text |
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413 // support code. It implies that all Johab characters comprise two |
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414 // octets, which isn't true. Johab supports the ASCII/KS-Roman |
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415 // characters from 0x21-0x7E with single-byte representations. |
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416 ControlSequence johab = new ControlSequence( |
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417 new byte[] { 0x1b, 0x25, 0x2f, 0x32 }, |
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418 new byte[] { 0x53, 0x55, 0x4e, 0x2d, 0x4b, 0x53, 0x43, 0x35, |
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419 0x36, 0x30, 0x31, 0x2e, 0x31, 0x39, 0x39, 0x32, |
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420 0x2d, 0x33 }); |
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421 tSequenceToEncodingMap.put(johab, "x-Johab"); |
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422 tEncodingToSequenceMap.put("x-Johab", johab); |
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423 tEncodings.add("x-Johab"); |
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424 } |
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425 // Esc seq: %/2??SUN-BIG5-1 |
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426 if (isEncodingSupported("Big5")) { |
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427 // 0x32 looks wrong. It's copied from the Sun X11 Compound Text |
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428 // support code. It implies that all Big5 characters comprise two |
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429 // octets, which isn't true. Big5 supports the ASCII/CNS-Roman |
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430 // characters from 0x21-0x7E with single-byte representations. |
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431 ControlSequence big5 = new ControlSequence( |
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432 new byte[] { 0x1b, 0x25, 0x2f, 0x32 }, |
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433 new byte[] { 0x53, 0x55, 0x4e, 0x2d, 0x42, 0x49, 0x47, 0x35, |
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434 0x2d, 0x31 }); |
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435 tSequenceToEncodingMap.put(big5, "Big5"); |
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436 tEncodingToSequenceMap.put("Big5", big5); |
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437 tEncodings.add("Big5"); |
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438 } |
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439 |
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440 sequenceToEncodingMap = |
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441 Collections.unmodifiableMap(tSequenceToEncodingMap); |
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442 highBitsMap = Collections.unmodifiableMap(tHighBitsMap); |
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443 encodingToSequenceMap = |
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444 Collections.unmodifiableMap(tEncodingToSequenceMap); |
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445 encodings = Collections.unmodifiableList(tEncodings); |
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446 } |
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447 |
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448 private static boolean isEncodingSupported(String encoding) { |
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449 try { |
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450 if (Charset.isSupported(encoding)) |
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451 return true; |
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452 } catch (IllegalArgumentException x) { } |
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453 return (getDecoder(encoding) != null && |
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454 getEncoder(encoding) != null); |
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455 } |
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456 |
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457 |
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458 // For Decoder |
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459 static CharsetDecoder getStandardDecoder(byte[] escSequence) { |
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460 return getNonStandardDecoder(escSequence, null); |
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461 } |
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462 static boolean getHighBit(byte[] escSequence) { |
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463 Boolean bool = highBitsMap.get(new ControlSequence(escSequence)); |
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464 return (bool == Boolean.TRUE); |
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465 } |
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466 static CharsetDecoder getNonStandardDecoder(byte[] escSequence, |
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467 byte[] encoding) { |
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468 return getDecoder(sequenceToEncodingMap.get |
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469 (new ControlSequence(escSequence, encoding))); |
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470 } |
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471 static CharsetDecoder getDecoder(String enc) { |
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472 if (enc == null) { |
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473 return null; |
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474 } |
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475 Charset cs = null; |
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476 try { |
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477 cs = Charset.forName(enc); |
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478 } catch (IllegalArgumentException e) { |
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479 Class<?> cls; |
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480 try { |
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481 cls = Class.forName("sun.awt.motif." + enc); |
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482 } catch (ClassNotFoundException ee) { |
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483 return null; |
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484 } |
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485 try { |
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486 cs = (Charset)cls.newInstance(); |
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487 } catch (InstantiationException ee) { |
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488 return null; |
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489 } catch (IllegalAccessException ee) { |
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490 return null; |
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491 } |
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492 } |
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493 try { |
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494 return cs.newDecoder(); |
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495 } catch (UnsupportedOperationException e) {} |
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496 return null; |
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497 } |
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498 |
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499 |
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500 // For Encoder |
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501 static byte[] getEscapeSequence(String encoding) { |
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502 ControlSequence seq = encodingToSequenceMap.get(encoding); |
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503 if (seq != null) { |
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504 return seq.escSequence; |
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505 } |
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506 return null; |
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507 } |
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508 static byte[] getEncoding(String encoding) { |
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509 ControlSequence seq = encodingToSequenceMap.get(encoding); |
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510 if (seq != null) { |
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511 return seq.encoding; |
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512 } |
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513 return null; |
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514 } |
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515 static List<String> getEncodings() { |
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516 return encodings; |
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517 } |
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518 static CharsetEncoder getEncoder(String enc) { |
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519 if (enc == null) { |
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520 return null; |
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521 } |
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522 Charset cs = null; |
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523 try { |
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524 cs = Charset.forName(enc); |
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525 } catch (IllegalArgumentException e) { |
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526 Class<?> cls; |
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527 try { |
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528 cls = Class.forName("sun.awt.motif." + enc); |
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529 } catch (ClassNotFoundException ee) { |
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530 return null; |
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531 } |
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532 try { |
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533 cs = (Charset)cls.newInstance(); |
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534 } catch (InstantiationException ee) { |
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535 return null; |
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536 } catch (IllegalAccessException ee) { |
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537 return null; |
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538 } |
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539 } |
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540 try { |
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541 return cs.newEncoder(); |
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542 } catch (Throwable e) {} |
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543 return null; |
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544 } |
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545 |
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546 // Not an instantiable class |
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547 private CompoundTextSupport() {} |
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548 } |
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