diff options
Diffstat (limited to 'java/client/src/org/apache/commons/codec/binary/StringUtils.java')
| -rw-r--r-- | java/client/src/org/apache/commons/codec/binary/StringUtils.java | 343 |
1 files changed, 343 insertions, 0 deletions
diff --git a/java/client/src/org/apache/commons/codec/binary/StringUtils.java b/java/client/src/org/apache/commons/codec/binary/StringUtils.java new file mode 100644 index 0000000..14a362f --- /dev/null +++ b/java/client/src/org/apache/commons/codec/binary/StringUtils.java | |||
| @@ -0,0 +1,343 @@ | |||
| 1 | /* | ||
| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| 3 | * contributor license agreements. See the NOTICE file distributed with | ||
| 4 | * this work for additional information regarding copyright ownership. | ||
| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| 6 | * (the "License"); you may not use this file except in compliance with | ||
| 7 | * the License. You may obtain a copy of the License at | ||
| 8 | * | ||
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 | ||
| 10 | * | ||
| 11 | * Unless required by applicable law or agreed to in writing, software | ||
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, | ||
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| 14 | * See the License for the specific language governing permissions and | ||
| 15 | * limitations under the License. | ||
| 16 | */ | ||
| 17 | |||
| 18 | package org.apache.commons.codec.binary; | ||
| 19 | |||
| 20 | import java.io.UnsupportedEncodingException; | ||
| 21 | import java.nio.charset.Charset; | ||
| 22 | |||
| 23 | import org.apache.commons.codec.CharEncoding; | ||
| 24 | import org.apache.commons.codec.Charsets; | ||
| 25 | |||
| 26 | /** | ||
| 27 | * Converts String to and from bytes using the encodings required by the Java specification. These encodings are | ||
| 28 | * specified in <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html"> | ||
| 29 | * Standard charsets</a>. | ||
| 30 | * | ||
| 31 | * <p>This class is immutable and thread-safe.</p> | ||
| 32 | * | ||
| 33 | * @see CharEncoding | ||
| 34 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 35 | * @version $Id$ | ||
| 36 | * @since 1.4 | ||
| 37 | */ | ||
| 38 | public class StringUtils { | ||
| 39 | |||
| 40 | /** | ||
| 41 | * Calls {@link String#getBytes(Charset)} | ||
| 42 | * | ||
| 43 | * @param string | ||
| 44 | * The string to encode (if null, return null). | ||
| 45 | * @param charset | ||
| 46 | * The {@link Charset} to encode the {@code String} | ||
| 47 | * @return the encoded bytes | ||
| 48 | */ | ||
| 49 | private static byte[] getBytes(final String string, final Charset charset) { | ||
| 50 | if (string == null) { | ||
| 51 | return null; | ||
| 52 | } | ||
| 53 | return string.getBytes(charset); | ||
| 54 | } | ||
| 55 | |||
| 56 | /** | ||
| 57 | * Encodes the given string into a sequence of bytes using the ISO-8859-1 charset, storing the result into a new | ||
| 58 | * byte array. | ||
| 59 | * | ||
| 60 | * @param string | ||
| 61 | * the String to encode, may be {@code null} | ||
| 62 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 63 | * @throws NullPointerException | ||
| 64 | * Thrown if {@link Charsets#ISO_8859_1} is not initialized, which should never happen since it is | ||
| 65 | * required by the Java platform specification. | ||
| 66 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 67 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 68 | * @see #getBytesUnchecked(String, String) | ||
| 69 | */ | ||
| 70 | public static byte[] getBytesIso8859_1(final String string) { | ||
| 71 | return getBytes(string, Charsets.ISO_8859_1); | ||
| 72 | } | ||
| 73 | |||
| 74 | |||
| 75 | /** | ||
| 76 | * Encodes the given string into a sequence of bytes using the named charset, storing the result into a new byte | ||
| 77 | * array. | ||
| 78 | * <p> | ||
| 79 | * This method catches {@link UnsupportedEncodingException} and rethrows it as {@link IllegalStateException}, which | ||
| 80 | * should never happen for a required charset name. Use this method when the encoding is required to be in the JRE. | ||
| 81 | * </p> | ||
| 82 | * | ||
| 83 | * @param string | ||
| 84 | * the String to encode, may be {@code null} | ||
| 85 | * @param charsetName | ||
| 86 | * The name of a required {@link java.nio.charset.Charset} | ||
| 87 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 88 | * @throws IllegalStateException | ||
| 89 | * Thrown when a {@link UnsupportedEncodingException} is caught, which should never happen for a | ||
| 90 | * required charset name. | ||
| 91 | * @see CharEncoding | ||
| 92 | * @see String#getBytes(String) | ||
| 93 | */ | ||
| 94 | public static byte[] getBytesUnchecked(final String string, final String charsetName) { | ||
| 95 | if (string == null) { | ||
| 96 | return null; | ||
| 97 | } | ||
| 98 | try { | ||
| 99 | return string.getBytes(charsetName); | ||
| 100 | } catch (final UnsupportedEncodingException e) { | ||
| 101 | throw StringUtils.newIllegalStateException(charsetName, e); | ||
| 102 | } | ||
| 103 | } | ||
| 104 | |||
| 105 | /** | ||
| 106 | * Encodes the given string into a sequence of bytes using the US-ASCII charset, storing the result into a new byte | ||
| 107 | * array. | ||
| 108 | * | ||
| 109 | * @param string | ||
| 110 | * the String to encode, may be {@code null} | ||
| 111 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 112 | * @throws NullPointerException | ||
| 113 | * Thrown if {@link Charsets#US_ASCII} is not initialized, which should never happen since it is | ||
| 114 | * required by the Java platform specification. | ||
| 115 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 116 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 117 | * @see #getBytesUnchecked(String, String) | ||
| 118 | */ | ||
| 119 | public static byte[] getBytesUsAscii(final String string) { | ||
| 120 | return getBytes(string, Charsets.US_ASCII); | ||
| 121 | } | ||
| 122 | |||
| 123 | /** | ||
| 124 | * Encodes the given string into a sequence of bytes using the UTF-16 charset, storing the result into a new byte | ||
| 125 | * array. | ||
| 126 | * | ||
| 127 | * @param string | ||
| 128 | * the String to encode, may be {@code null} | ||
| 129 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 130 | * @throws NullPointerException | ||
| 131 | * Thrown if {@link Charsets#UTF_16} is not initialized, which should never happen since it is | ||
| 132 | * required by the Java platform specification. | ||
| 133 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 134 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 135 | * @see #getBytesUnchecked(String, String) | ||
| 136 | */ | ||
| 137 | public static byte[] getBytesUtf16(final String string) { | ||
| 138 | return getBytes(string, Charsets.UTF_16); | ||
| 139 | } | ||
| 140 | |||
| 141 | /** | ||
| 142 | * Encodes the given string into a sequence of bytes using the UTF-16BE charset, storing the result into a new byte | ||
| 143 | * array. | ||
| 144 | * | ||
| 145 | * @param string | ||
| 146 | * the String to encode, may be {@code null} | ||
| 147 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 148 | * @throws NullPointerException | ||
| 149 | * Thrown if {@link Charsets#UTF_16BE} is not initialized, which should never happen since it is | ||
| 150 | * required by the Java platform specification. | ||
| 151 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 152 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 153 | * @see #getBytesUnchecked(String, String) | ||
| 154 | */ | ||
| 155 | public static byte[] getBytesUtf16Be(final String string) { | ||
| 156 | return getBytes(string, Charsets.UTF_16BE); | ||
| 157 | } | ||
| 158 | |||
| 159 | /** | ||
| 160 | * Encodes the given string into a sequence of bytes using the UTF-16LE charset, storing the result into a new byte | ||
| 161 | * array. | ||
| 162 | * | ||
| 163 | * @param string | ||
| 164 | * the String to encode, may be {@code null} | ||
| 165 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 166 | * @throws NullPointerException | ||
| 167 | * Thrown if {@link Charsets#UTF_16LE} is not initialized, which should never happen since it is | ||
| 168 | * required by the Java platform specification. | ||
| 169 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 170 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 171 | * @see #getBytesUnchecked(String, String) | ||
| 172 | */ | ||
| 173 | public static byte[] getBytesUtf16Le(final String string) { | ||
| 174 | return getBytes(string, Charsets.UTF_16LE); | ||
| 175 | } | ||
| 176 | |||
| 177 | /** | ||
| 178 | * Encodes the given string into a sequence of bytes using the UTF-8 charset, storing the result into a new byte | ||
| 179 | * array. | ||
| 180 | * | ||
| 181 | * @param string | ||
| 182 | * the String to encode, may be {@code null} | ||
| 183 | * @return encoded bytes, or {@code null} if the input string was {@code null} | ||
| 184 | * @throws NullPointerException | ||
| 185 | * Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is | ||
| 186 | * required by the Java platform specification. | ||
| 187 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 188 | * @see <a href="http://download.oracle.com/javase/6/docs/api/java/nio/charset/Charset.html">Standard charsets</a> | ||
| 189 | * @see #getBytesUnchecked(String, String) | ||
| 190 | */ | ||
| 191 | public static byte[] getBytesUtf8(final String string) { | ||
| 192 | return getBytes(string, Charsets.UTF_8); | ||
| 193 | } | ||
| 194 | |||
| 195 | private static IllegalStateException newIllegalStateException(final String charsetName, | ||
| 196 | final UnsupportedEncodingException e) { | ||
| 197 | return new IllegalStateException(charsetName + ": " + e); | ||
| 198 | } | ||
| 199 | |||
| 200 | /** | ||
| 201 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the given charset. | ||
| 202 | * | ||
| 203 | * @param bytes | ||
| 204 | * The bytes to be decoded into characters | ||
| 205 | * @param charset | ||
| 206 | * The {@link Charset} to encode the {@code String} | ||
| 207 | * @return A new <code>String</code> decoded from the specified array of bytes using the given charset, | ||
| 208 | * or {@code null} if the input byte array was {@code null}. | ||
| 209 | * @throws NullPointerException | ||
| 210 | * Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is | ||
| 211 | * required by the Java platform specification. | ||
| 212 | */ | ||
| 213 | private static String newString(final byte[] bytes, final Charset charset) { | ||
| 214 | return bytes == null ? null : new String(bytes, charset); | ||
| 215 | } | ||
| 216 | |||
| 217 | /** | ||
| 218 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the given charset. | ||
| 219 | * <p> | ||
| 220 | * This method catches {@link UnsupportedEncodingException} and re-throws it as {@link IllegalStateException}, which | ||
| 221 | * should never happen for a required charset name. Use this method when the encoding is required to be in the JRE. | ||
| 222 | * </p> | ||
| 223 | * | ||
| 224 | * @param bytes | ||
| 225 | * The bytes to be decoded into characters, may be {@code null} | ||
| 226 | * @param charsetName | ||
| 227 | * The name of a required {@link java.nio.charset.Charset} | ||
| 228 | * @return A new <code>String</code> decoded from the specified array of bytes using the given charset, | ||
| 229 | * or {@code null} if the input byte array was {@code null}. | ||
| 230 | * @throws IllegalStateException | ||
| 231 | * Thrown when a {@link UnsupportedEncodingException} is caught, which should never happen for a | ||
| 232 | * required charset name. | ||
| 233 | * @see CharEncoding | ||
| 234 | * @see String#String(byte[], String) | ||
| 235 | */ | ||
| 236 | public static String newString(final byte[] bytes, final String charsetName) { | ||
| 237 | if (bytes == null) { | ||
| 238 | return null; | ||
| 239 | } | ||
| 240 | try { | ||
| 241 | return new String(bytes, charsetName); | ||
| 242 | } catch (final UnsupportedEncodingException e) { | ||
| 243 | throw StringUtils.newIllegalStateException(charsetName, e); | ||
| 244 | } | ||
| 245 | } | ||
| 246 | |||
| 247 | /** | ||
| 248 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the ISO-8859-1 charset. | ||
| 249 | * | ||
| 250 | * @param bytes | ||
| 251 | * The bytes to be decoded into characters, may be {@code null} | ||
| 252 | * @return A new <code>String</code> decoded from the specified array of bytes using the ISO-8859-1 charset, or | ||
| 253 | * {@code null} if the input byte array was {@code null}. | ||
| 254 | * @throws NullPointerException | ||
| 255 | * Thrown if {@link Charsets#ISO_8859_1} is not initialized, which should never happen since it is | ||
| 256 | * required by the Java platform specification. | ||
| 257 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 258 | */ | ||
| 259 | public static String newStringIso8859_1(final byte[] bytes) { | ||
| 260 | return new String(bytes, Charsets.ISO_8859_1); | ||
| 261 | } | ||
| 262 | |||
| 263 | /** | ||
| 264 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the US-ASCII charset. | ||
| 265 | * | ||
| 266 | * @param bytes | ||
| 267 | * The bytes to be decoded into characters | ||
| 268 | * @return A new <code>String</code> decoded from the specified array of bytes using the US-ASCII charset, | ||
| 269 | * or {@code null} if the input byte array was {@code null}. | ||
| 270 | * @throws NullPointerException | ||
| 271 | * Thrown if {@link Charsets#US_ASCII} is not initialized, which should never happen since it is | ||
| 272 | * required by the Java platform specification. | ||
| 273 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 274 | */ | ||
| 275 | public static String newStringUsAscii(final byte[] bytes) { | ||
| 276 | return new String(bytes, Charsets.US_ASCII); | ||
| 277 | } | ||
| 278 | |||
| 279 | /** | ||
| 280 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the UTF-16 charset. | ||
| 281 | * | ||
| 282 | * @param bytes | ||
| 283 | * The bytes to be decoded into characters | ||
| 284 | * @return A new <code>String</code> decoded from the specified array of bytes using the UTF-16 charset | ||
| 285 | * or {@code null} if the input byte array was {@code null}. | ||
| 286 | * @throws NullPointerException | ||
| 287 | * Thrown if {@link Charsets#UTF_16} is not initialized, which should never happen since it is | ||
| 288 | * required by the Java platform specification. | ||
| 289 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 290 | */ | ||
| 291 | public static String newStringUtf16(final byte[] bytes) { | ||
| 292 | return new String(bytes, Charsets.UTF_16); | ||
| 293 | } | ||
| 294 | |||
| 295 | /** | ||
| 296 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the UTF-16BE charset. | ||
| 297 | * | ||
| 298 | * @param bytes | ||
| 299 | * The bytes to be decoded into characters | ||
| 300 | * @return A new <code>String</code> decoded from the specified array of bytes using the UTF-16BE charset, | ||
| 301 | * or {@code null} if the input byte array was {@code null}. | ||
| 302 | * @throws NullPointerException | ||
| 303 | * Thrown if {@link Charsets#UTF_16BE} is not initialized, which should never happen since it is | ||
| 304 | * required by the Java platform specification. | ||
| 305 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 306 | */ | ||
| 307 | public static String newStringUtf16Be(final byte[] bytes) { | ||
| 308 | return new String(bytes, Charsets.UTF_16BE); | ||
| 309 | } | ||
| 310 | |||
| 311 | /** | ||
| 312 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the UTF-16LE charset. | ||
| 313 | * | ||
| 314 | * @param bytes | ||
| 315 | * The bytes to be decoded into characters | ||
| 316 | * @return A new <code>String</code> decoded from the specified array of bytes using the UTF-16LE charset, | ||
| 317 | * or {@code null} if the input byte array was {@code null}. | ||
| 318 | * @throws NullPointerException | ||
| 319 | * Thrown if {@link Charsets#UTF_16LE} is not initialized, which should never happen since it is | ||
| 320 | * required by the Java platform specification. | ||
| 321 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 322 | */ | ||
| 323 | public static String newStringUtf16Le(final byte[] bytes) { | ||
| 324 | return new String(bytes, Charsets.UTF_16LE); | ||
| 325 | } | ||
| 326 | |||
| 327 | /** | ||
| 328 | * Constructs a new <code>String</code> by decoding the specified array of bytes using the UTF-8 charset. | ||
| 329 | * | ||
| 330 | * @param bytes | ||
| 331 | * The bytes to be decoded into characters | ||
| 332 | * @return A new <code>String</code> decoded from the specified array of bytes using the UTF-8 charset, | ||
| 333 | * or {@code null} if the input byte array was {@code null}. | ||
| 334 | * @throws NullPointerException | ||
| 335 | * Thrown if {@link Charsets#UTF_8} is not initialized, which should never happen since it is | ||
| 336 | * required by the Java platform specification. | ||
| 337 | * @since As of 1.7, throws {@link NullPointerException} instead of UnsupportedEncodingException | ||
| 338 | */ | ||
| 339 | public static String newStringUtf8(final byte[] bytes) { | ||
| 340 | return newString(bytes, Charsets.UTF_8); | ||
| 341 | } | ||
| 342 | |||
| 343 | } | ||
