| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| HgInputStream |
|
| 3.9047619047619047;3.905 |
| 1 | /* | |
| 2 | * #%L | |
| 3 | * JavaHg | |
| 4 | * %% | |
| 5 | * Copyright (C) 2011 aragost Trifork ag | |
| 6 | * %% | |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
| 8 | * of this software and associated documentation files (the "Software"), to deal | |
| 9 | * in the Software without restriction, including without limitation the rights | |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
| 11 | * copies of the Software, and to permit persons to whom the Software is | |
| 12 | * furnished to do so, subject to the following conditions: | |
| 13 | * | |
| 14 | * The above copyright notice and this permission notice shall be included in | |
| 15 | * all copies or substantial portions of the Software. | |
| 16 | * | |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
| 20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
| 23 | * THE SOFTWARE. | |
| 24 | * #L% | |
| 25 | */ | |
| 26 | package com.aragost.javahg.internals; | |
| 27 | ||
| 28 | import java.io.BufferedInputStream; | |
| 29 | import java.io.ByteArrayOutputStream; | |
| 30 | import java.io.IOException; | |
| 31 | import java.io.InputStream; | |
| 32 | import java.nio.charset.CharsetDecoder; | |
| 33 | ||
| 34 | import com.aragost.javahg.DateTime; | |
| 35 | ||
| 36 | /** | |
| 37 | * An InputStream that has some methods that make it convenient for | |
| 38 | * JavaHg to read the stdout from the command server. | |
| 39 | */ | |
| 40 | public class HgInputStream extends BufferedInputStream { | |
| 41 | ||
| 42 | private CharsetDecoder textDecoder; | |
| 43 | ||
| 44 | /** | |
| 45 | * @param in | |
| 46 | * the byte stream. | |
| 47 | * @param textDecoder | |
| 48 | * the decoder used when Strings are extracted from the | |
| 49 | * byte stream. | |
| 50 | */ | |
| 51 | public HgInputStream(InputStream in, CharsetDecoder textDecoder) { | |
| 52 | 3816 | super(in); |
| 53 | 3816 | this.textDecoder = textDecoder; |
| 54 | 3816 | } |
| 55 | ||
| 56 | /** | |
| 57 | * Return the next byte from the stream without forwarding the | |
| 58 | * position. | |
| 59 | * | |
| 60 | * @return the byte read or -1 if EOF is reached. | |
| 61 | * @throws IOException | |
| 62 | */ | |
| 63 | public int peek() throws IOException { | |
| 64 | 4187 | mark(1); |
| 65 | 4187 | int result = read(); |
| 66 | 4187 | reset(); |
| 67 | 4187 | return result; |
| 68 | } | |
| 69 | ||
| 70 | /** | |
| 71 | * @return true if no more bytes can be read from the stream | |
| 72 | * @throws IOException | |
| 73 | */ | |
| 74 | public boolean isEof() throws IOException { | |
| 75 | 3888 | return peek() == -1; |
| 76 | } | |
| 77 | ||
| 78 | /** | |
| 79 | * Get the next {@code length} bytes from the stream. | |
| 80 | * | |
| 81 | * @param length | |
| 82 | * the number of bytes to read. | |
| 83 | * @return the bytes read or {@code null} if EOF is reached before | |
| 84 | * all the bytes have been read. | |
| 85 | * @throws IOException | |
| 86 | */ | |
| 87 | public byte[] next(int length) throws IOException { | |
| 88 | 330 | byte[] bytes = new byte[length]; |
| 89 | 330 | int remaining = length; |
| 90 | 660 | while (remaining > 0) { |
| 91 | 330 | int n = read(bytes, length - remaining, remaining); |
| 92 | 330 | if (n == -1) { |
| 93 | 0 | return null; |
| 94 | } | |
| 95 | 330 | remaining = remaining - n; |
| 96 | 330 | } |
| 97 | 330 | return bytes; |
| 98 | } | |
| 99 | ||
| 100 | /** | |
| 101 | * Get the next {@code length} bytes from the stream, and return | |
| 102 | * it as a String | |
| 103 | * | |
| 104 | * @param length | |
| 105 | * @return the decoded String | |
| 106 | * @throws IOException | |
| 107 | */ | |
| 108 | public String nextAsText(int length) throws IOException { | |
| 109 | 220 | byte[] bytes = next(length); |
| 110 | 220 | if (bytes == null) { |
| 111 | 0 | return null; |
| 112 | } else { | |
| 113 | 220 | return Utils.decodeBytes(bytes, this.textDecoder); |
| 114 | } | |
| 115 | } | |
| 116 | ||
| 117 | /** | |
| 118 | * Look for a fixed set of bytes in the stream. The current | |
| 119 | * position is advanced by the length of the bytes to look for if | |
| 120 | * they are found, otherwise it is left unchanged. | |
| 121 | * | |
| 122 | * @param bytes | |
| 123 | * the bytes to look for | |
| 124 | * @return true if the bytes were found at the current position. | |
| 125 | * @throws IOException | |
| 126 | */ | |
| 127 | public boolean match(byte[] bytes) throws IOException { | |
| 128 | 346 | mark(bytes.length); |
| 129 | 2840 | for (int i = 0; i < bytes.length; i++) { |
| 130 | 2725 | int n = read(); |
| 131 | 2725 | if (n == -1 || (byte) n != bytes[i]) { |
| 132 | 231 | reset(); |
| 133 | 231 | return false; |
| 134 | } | |
| 135 | } | |
| 136 | 115 | return true; |
| 137 | } | |
| 138 | ||
| 139 | /** | |
| 140 | * Look for a fixed byte in the stream. The current position is | |
| 141 | * advanced by 1 if the byte is found, otherwise it is left | |
| 142 | * unchanged. | |
| 143 | * | |
| 144 | * @param b | |
| 145 | * the byte to look for. | |
| 146 | * @return true if the byte was found at the current position. | |
| 147 | * @throws IOException | |
| 148 | */ | |
| 149 | public boolean match(int b) throws IOException { | |
| 150 | 148 | mark(1); |
| 151 | 148 | int n = read(); |
| 152 | 148 | if (n == b) { |
| 153 | 146 | return true; |
| 154 | } else { | |
| 155 | 2 | reset(); |
| 156 | 2 | return false; |
| 157 | } | |
| 158 | } | |
| 159 | ||
| 160 | /** | |
| 161 | * Verifies that the next bytes in the stream matches the | |
| 162 | * specified bytes. | |
| 163 | * | |
| 164 | * @param bytes | |
| 165 | * @throws IOException | |
| 166 | * @throws UnexpectedCommandOutputException | |
| 167 | * if the stream doesn't match the specified bytes | |
| 168 | */ | |
| 169 | public void mustMatch(byte[] bytes) throws IOException, UnexpectedCommandOutputException { | |
| 170 | 838 | for (int i = 0; i < bytes.length; i++) { |
| 171 | 796 | mustMatch(bytes[i]); |
| 172 | } | |
| 173 | 42 | } |
| 174 | ||
| 175 | /** | |
| 176 | * Verifies that the next byte in the stream matches the specified | |
| 177 | * byte. | |
| 178 | * | |
| 179 | * @param b | |
| 180 | * the next byte | |
| 181 | * @throws IOException | |
| 182 | * @throws UnexpectedCommandOutputException | |
| 183 | * if the stream doesn't match the specified bytes | |
| 184 | */ | |
| 185 | public void mustMatch(int b) throws IOException, UnexpectedCommandOutputException { | |
| 186 | 946 | int n = read(); |
| 187 | 946 | if ((byte) n != b) { |
| 188 | 0 | throw new UnexpectedCommandOutputException("Got " + n + ", but expected " + b); |
| 189 | } | |
| 190 | 946 | } |
| 191 | ||
| 192 | /** | |
| 193 | * Read from the stream until a fixed set of bytes are found. The | |
| 194 | * current position is left after the stop bytes. | |
| 195 | * | |
| 196 | * @param stop | |
| 197 | * the bytes to look for. | |
| 198 | * @return the bytes read while looking for the stop bytes. This | |
| 199 | * does not include the stop bytes themselves. | |
| 200 | * @throws IOException | |
| 201 | */ | |
| 202 | public byte[] upTo(byte[] stop) throws IOException { | |
| 203 | 22 | if (stop.length == 0) { |
| 204 | 0 | return new byte[0]; |
| 205 | } | |
| 206 | 22 | ByteArrayOutputStream byteStream = new ByteArrayOutputStream(80); |
| 207 | 22 | int stopIndex = 0; |
| 208 | ||
| 209 | while (true) { | |
| 210 | 1087 | int b = read(); |
| 211 | 1087 | if (b == -1) { |
| 212 | 1 | return null; |
| 213 | // byteStream.write(stop, 0, stopIndex); | |
| 214 | // break; | |
| 215 | } | |
| 216 | 1086 | if (stop[stopIndex] == (byte) b) { |
| 217 | 820 | if (stopIndex == 0) { |
| 218 | 39 | mark(stop.length); |
| 219 | } | |
| 220 | 820 | stopIndex++; |
| 221 | 820 | if (stopIndex == stop.length) { |
| 222 | 21 | break; |
| 223 | } | |
| 224 | } else { | |
| 225 | 266 | if (stopIndex > 0) { |
| 226 | 17 | byteStream.write(stop, 0, 1); |
| 227 | 17 | reset(); |
| 228 | 17 | stopIndex = 0; |
| 229 | } else { | |
| 230 | 249 | byteStream.write(b); |
| 231 | } | |
| 232 | } | |
| 233 | 1065 | } |
| 234 | 21 | return byteStream.toByteArray(); |
| 235 | } | |
| 236 | ||
| 237 | /** | |
| 238 | * Read from the stream until a fixed byte is found. The current | |
| 239 | * position is left after the stop byte. | |
| 240 | * | |
| 241 | * @param stop | |
| 242 | * the byte to look for. | |
| 243 | * @return the bytes read while looking for the stop byte. This | |
| 244 | * does not include the stop byte. | |
| 245 | * @throws IOException | |
| 246 | */ | |
| 247 | public byte[] upTo(int stop) throws IOException { | |
| 248 | 1719 | ByteArrayOutputStream byteStream = new ByteArrayOutputStream(40); |
| 249 | while (true) { | |
| 250 | 21199 | int n = read(); |
| 251 | 21199 | if (n == -1) { |
| 252 | 0 | return null; |
| 253 | } | |
| 254 | 21199 | if (n == stop) { |
| 255 | 1719 | break; |
| 256 | } | |
| 257 | 19480 | byteStream.write(n); |
| 258 | 19480 | } |
| 259 | 1719 | return byteStream.toByteArray(); |
| 260 | } | |
| 261 | ||
| 262 | /** | |
| 263 | * Search for the specified bytes in the stream. If found then the | |
| 264 | * position in the stream is just after the bytes. If not found, | |
| 265 | * the stream is positioned at EOF. | |
| 266 | * | |
| 267 | * @param bytes | |
| 268 | * @return true if the bytes were found, false otherwise | |
| 269 | * @throws IOException | |
| 270 | */ | |
| 271 | public boolean find(byte[] bytes) throws IOException { | |
| 272 | 111 | int index = 0; |
| 273 | 111 | int length = bytes.length; |
| 274 | 111 | if (length == 0) { |
| 275 | 2 | throw new IllegalArgumentException("Can't search for nothing"); |
| 276 | } | |
| 277 | while (true) { | |
| 278 | 12428 | int b = read(); |
| 279 | 12428 | if (b == -1) { |
| 280 | 23 | return false; |
| 281 | } | |
| 282 | 12405 | if (bytes[index] == (byte) b) { |
| 283 | 1940 | if (index == 0) { |
| 284 | 320 | mark(length); |
| 285 | } | |
| 286 | 1940 | index++; |
| 287 | 1940 | if (index == length) { |
| 288 | 86 | return true; |
| 289 | } | |
| 290 | 10465 | } else if (index > 0) { |
| 291 | 234 | reset(); |
| 292 | 234 | index = 0; |
| 293 | } | |
| 294 | 12319 | } |
| 295 | } | |
| 296 | ||
| 297 | /** | |
| 298 | * Read from stream until the specified byte is read. | |
| 299 | * | |
| 300 | * @param b | |
| 301 | * @return true if the byte was found, otherwise false | |
| 302 | * @throws IOException | |
| 303 | */ | |
| 304 | public boolean find(int b) throws IOException { | |
| 305 | while (true) { | |
| 306 | 0 | int n = read(); |
| 307 | 0 | if (n == -1) { |
| 308 | 0 | return false; |
| 309 | } | |
| 310 | 0 | if (n == b) { |
| 311 | 0 | return true; |
| 312 | } | |
| 313 | 0 | } |
| 314 | ||
| 315 | } | |
| 316 | ||
| 317 | /** | |
| 318 | * Read a non-negative integer from the stream until a fixed byte | |
| 319 | * is found. The current position is left after the stop byte. | |
| 320 | * | |
| 321 | * @param stop | |
| 322 | * the byte to look for. | |
| 323 | * @return the integer read. | |
| 324 | * @throws IOException | |
| 325 | */ | |
| 326 | public int decimalIntUpTo(int stop) throws IOException { | |
| 327 | 339 | int result = 0; |
| 328 | while (true) { | |
| 329 | 1980 | int n = read(); |
| 330 | 1980 | if (n == -1 || n == stop) { |
| 331 | 339 | return result; |
| 332 | } | |
| 333 | 1641 | int digit = n - '0'; |
| 334 | 1641 | if (digit < 0 || digit >= 10) { |
| 335 | 0 | throw new IOException("A non-digit found: " + (char) n); |
| 336 | } | |
| 337 | 1641 | result = result * 10 + digit; |
| 338 | 1641 | } |
| 339 | } | |
| 340 | ||
| 341 | /** | |
| 342 | * Read a non-negative integer from the stream. | |
| 343 | * | |
| 344 | * All characters that are a valid digit is read. | |
| 345 | * | |
| 346 | * @return null if the next character is a non-digit, otherwise | |
| 347 | * return the integer value of the digit characters read | |
| 348 | * from stream | |
| 349 | * @throws IOException | |
| 350 | */ | |
| 351 | public Integer readDecimal() throws IOException { | |
| 352 | 49 | boolean somethingRead = false; |
| 353 | 49 | int result = 0; |
| 354 | while (true) { | |
| 355 | 103 | mark(1); |
| 356 | 103 | int n = read(); |
| 357 | 103 | if (n == -1) { |
| 358 | 2 | break; |
| 359 | } | |
| 360 | 101 | int digit = n - '0'; |
| 361 | 101 | if (digit >= 0 && digit < 10) { |
| 362 | 54 | somethingRead = true; |
| 363 | 54 | result = 10 * result + digit; |
| 364 | } else { | |
| 365 | 47 | reset(); |
| 366 | 47 | break; |
| 367 | } | |
| 368 | 54 | } |
| 369 | 49 | return somethingRead ? Integer.valueOf(result) : null; |
| 370 | } | |
| 371 | ||
| 372 | /** | |
| 373 | * Read a revision number from the stream until a fixed byte is | |
| 374 | * found. A revision number is an integer greater than or equal to | |
| 375 | * -1. The current position is left after the stop byte. | |
| 376 | * <p> | |
| 377 | * Initial spaces in the stream is skipped until a '-' or a digit is found. | |
| 378 | * | |
| 379 | * @param stop | |
| 380 | * the byte to look for. | |
| 381 | * @return the integer read. | |
| 382 | * @throws IOException | |
| 383 | */ | |
| 384 | public int revisionUpTo(int stop) throws IOException { | |
| 385 | 119 | while (peek() == ' ') { |
| 386 | 2 | read(); |
| 387 | } | |
| 388 | 117 | if (peek() == '-') { |
| 389 | 0 | read(); |
| 390 | 0 | mustMatch('1'); |
| 391 | 0 | mustMatch(stop); |
| 392 | 0 | return -1; |
| 393 | } else { | |
| 394 | 117 | return decimalIntUpTo(stop); |
| 395 | } | |
| 396 | } | |
| 397 | ||
| 398 | /** | |
| 399 | * Read a Mercurial date from the stream, stopping when a fixed | |
| 400 | * byte is met. A Mercurial date is produced with the "hgdate" | |
| 401 | * template filter and consist of two integers, the first is the | |
| 402 | * number of seconds since 1970 and the second is the time zone | |
| 403 | * offset. | |
| 404 | * | |
| 405 | * @param stopByte | |
| 406 | * the stop byte | |
| 407 | * @return a parsed date | |
| 408 | * @throws IOException | |
| 409 | */ | |
| 410 | public DateTime dateTimeUpTo(int stopByte) throws IOException { | |
| 411 | 110 | long millis = 1000L * decimalIntUpTo(' '); |
| 412 | 110 | boolean negative = match('-'); |
| 413 | 110 | int timezoneOffset = 1000 * decimalIntUpTo(stopByte); |
| 414 | 110 | if (negative) { |
| 415 | 108 | timezoneOffset = -timezoneOffset; |
| 416 | } | |
| 417 | 110 | return new DateTime(millis, timezoneOffset); |
| 418 | } | |
| 419 | ||
| 420 | /** | |
| 421 | * Read from the stream until {@code end} is found, return the | |
| 422 | * read portion as a String. The current position is left after | |
| 423 | * the {@code end} marker. | |
| 424 | * | |
| 425 | * @param end | |
| 426 | * the stop marker. | |
| 427 | * @return the decoded bytes | |
| 428 | * @throws IOException | |
| 429 | */ | |
| 430 | public String textUpTo(byte[] end) throws IOException { | |
| 431 | 7 | byte[] bytes = upTo(end); |
| 432 | 7 | if (bytes == null) { |
| 433 | 0 | return null; |
| 434 | } else { | |
| 435 | 7 | return Utils.decodeBytes(bytes, this.textDecoder); |
| 436 | } | |
| 437 | } | |
| 438 | ||
| 439 | /** | |
| 440 | * Read from the stream until the byte {@code b} is found, return | |
| 441 | * the read portion as a String. The current position is left | |
| 442 | * after the {@code b} marker. | |
| 443 | * | |
| 444 | * @param b | |
| 445 | * the stop marker. | |
| 446 | * @return the decoded bytes | |
| 447 | * @throws IOException | |
| 448 | */ | |
| 449 | public String textUpTo(int b) throws IOException { | |
| 450 | 1454 | byte[] bytes = upTo(b); |
| 451 | 1454 | if (bytes == null) { |
| 452 | 0 | return null; |
| 453 | } else { | |
| 454 | 1454 | return Utils.decodeBytes(bytes, this.textDecoder); |
| 455 | } | |
| 456 | ||
| 457 | } | |
| 458 | ||
| 459 | /** | |
| 460 | * Read until EOF and discard the bytes read | |
| 461 | * | |
| 462 | * @throws IOException | |
| 463 | */ | |
| 464 | public void consumeAll() throws IOException { | |
| 465 | 44 | Utils.consumeAll(this); |
| 466 | 44 | } |
| 467 | ||
| 468 | @Override | |
| 469 | public String toString() { | |
| 470 | // Overridden for debugability | |
| 471 | 0 | StringBuilder buffer = new StringBuilder(); |
| 472 | ||
| 473 | 0 | buffer.append(new String(buf, 0, this.pos)); |
| 474 | 0 | buffer.append(">@<"); |
| 475 | 0 | buffer.append(new String(buf, this.pos, this.count)); |
| 476 | ||
| 477 | 0 | return buffer.toString(); |
| 478 | } | |
| 479 | } |