| 1 | /* |
| 2 | * Copyright 2006-2007 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package org.springframework.batch.item.file.mapping; |
| 18 | |
| 19 | import java.math.BigDecimal; |
| 20 | import java.text.ParseException; |
| 21 | import java.text.SimpleDateFormat; |
| 22 | import java.util.Arrays; |
| 23 | import java.util.Date; |
| 24 | import java.util.List; |
| 25 | import java.util.Properties; |
| 26 | |
| 27 | import org.springframework.util.Assert; |
| 28 | import org.springframework.util.StringUtils; |
| 29 | |
| 30 | /** |
| 31 | * Default implementation of {@link FieldSet} using Java using Java primitive |
| 32 | * and standard types and utilities. Strings are trimmed before parsing by |
| 33 | * default, and so are plain String values. |
| 34 | * |
| 35 | * @author Rob Harrop |
| 36 | * @author Dave Syer |
| 37 | */ |
| 38 | public class DefaultFieldSet implements FieldSet { |
| 39 | |
| 40 | private final static String DEFAULT_DATE_PATTERN = "yyyy-MM-dd"; |
| 41 | |
| 42 | /** |
| 43 | * The fields wrapped by this '<code>FieldSet</code>' instance. |
| 44 | */ |
| 45 | private String[] tokens; |
| 46 | |
| 47 | private List names; |
| 48 | |
| 49 | public DefaultFieldSet(String[] tokens) { |
| 50 | this.tokens = tokens == null ? null : (String[]) tokens.clone(); |
| 51 | } |
| 52 | |
| 53 | public DefaultFieldSet(String[] tokens, String[] names) { |
| 54 | Assert.notNull(tokens); |
| 55 | Assert.notNull(names); |
| 56 | if (tokens.length != names.length) { |
| 57 | throw new IllegalArgumentException("Field names must be same length as values: names=" |
| 58 | + Arrays.asList(names) + ", values=" + Arrays.asList(tokens)); |
| 59 | } |
| 60 | this.tokens = (String[]) tokens.clone(); |
| 61 | this.names = Arrays.asList(names); |
| 62 | } |
| 63 | |
| 64 | /* |
| 65 | * (non-Javadoc) |
| 66 | * @see org.springframework.batch.io.file.mapping.IFieldSet#getNames() |
| 67 | */ |
| 68 | public String[] getNames() { |
| 69 | if (names == null) { |
| 70 | throw new IllegalStateException("Field names are not known"); |
| 71 | } |
| 72 | return (String[]) names.toArray(); |
| 73 | } |
| 74 | |
| 75 | /* |
| 76 | * (non-Javadoc) |
| 77 | * @see org.springframework.batch.io.file.mapping.IFieldSet#getValues() |
| 78 | */ |
| 79 | public String[] getValues() { |
| 80 | return tokens; |
| 81 | } |
| 82 | |
| 83 | /* |
| 84 | * (non-Javadoc) |
| 85 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readString(int) |
| 86 | */ |
| 87 | public String readString(int index) { |
| 88 | return readAndTrim(index); |
| 89 | } |
| 90 | |
| 91 | /* |
| 92 | * (non-Javadoc) |
| 93 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readString(java.lang.String) |
| 94 | */ |
| 95 | public String readString(String name) { |
| 96 | return readString(indexOf(name)); |
| 97 | } |
| 98 | |
| 99 | /* |
| 100 | * (non-Javadoc) |
| 101 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readRawString(int) |
| 102 | */ |
| 103 | public String readRawString(int index) { |
| 104 | return tokens[index]; |
| 105 | } |
| 106 | |
| 107 | /* |
| 108 | * (non-Javadoc) |
| 109 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readRawString(java.lang.String) |
| 110 | */ |
| 111 | public String readRawString(String name) { |
| 112 | return readRawString(indexOf(name)); |
| 113 | } |
| 114 | |
| 115 | /* |
| 116 | * (non-Javadoc) |
| 117 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBoolean(int) |
| 118 | */ |
| 119 | public boolean readBoolean(int index) { |
| 120 | return readBoolean(index, "true"); |
| 121 | } |
| 122 | |
| 123 | /* |
| 124 | * (non-Javadoc) |
| 125 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBoolean(java.lang.String) |
| 126 | */ |
| 127 | public boolean readBoolean(String name) { |
| 128 | return readBoolean(indexOf(name)); |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * (non-Javadoc) |
| 133 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBoolean(int, |
| 134 | * java.lang.String) |
| 135 | */ |
| 136 | public boolean readBoolean(int index, String trueValue) { |
| 137 | Assert.notNull(trueValue, "'trueValue' cannot be null."); |
| 138 | |
| 139 | String value = readAndTrim(index); |
| 140 | |
| 141 | return trueValue.equals(value) ? true : false; |
| 142 | } |
| 143 | |
| 144 | /* |
| 145 | * (non-Javadoc) |
| 146 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBoolean(java.lang.String, |
| 147 | * java.lang.String) |
| 148 | */ |
| 149 | public boolean readBoolean(String name, String trueValue) { |
| 150 | return readBoolean(indexOf(name), trueValue); |
| 151 | } |
| 152 | |
| 153 | /* |
| 154 | * (non-Javadoc) |
| 155 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readChar(int) |
| 156 | */ |
| 157 | public char readChar(int index) { |
| 158 | String value = readAndTrim(index); |
| 159 | |
| 160 | Assert.isTrue(value.length() == 1, "Cannot convert field value '" + value + "' to char."); |
| 161 | |
| 162 | return value.charAt(0); |
| 163 | } |
| 164 | |
| 165 | /* |
| 166 | * (non-Javadoc) |
| 167 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readChar(java.lang.String) |
| 168 | */ |
| 169 | public char readChar(String name) { |
| 170 | return readChar(indexOf(name)); |
| 171 | } |
| 172 | |
| 173 | /* |
| 174 | * (non-Javadoc) |
| 175 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readByte(int) |
| 176 | */ |
| 177 | public byte readByte(int index) { |
| 178 | return Byte.parseByte(readAndTrim(index)); |
| 179 | } |
| 180 | |
| 181 | /* |
| 182 | * (non-Javadoc) |
| 183 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readByte(java.lang.String) |
| 184 | */ |
| 185 | public byte readByte(String name) { |
| 186 | return readByte(indexOf(name)); |
| 187 | } |
| 188 | |
| 189 | /* |
| 190 | * (non-Javadoc) |
| 191 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readShort(int) |
| 192 | */ |
| 193 | public short readShort(int index) { |
| 194 | return Short.parseShort(readAndTrim(index)); |
| 195 | } |
| 196 | |
| 197 | /* |
| 198 | * (non-Javadoc) |
| 199 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readShort(java.lang.String) |
| 200 | */ |
| 201 | public short readShort(String name) { |
| 202 | return readShort(indexOf(name)); |
| 203 | } |
| 204 | |
| 205 | /* |
| 206 | * (non-Javadoc) |
| 207 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readInt(int) |
| 208 | */ |
| 209 | public int readInt(int index) { |
| 210 | return Integer.parseInt(readAndTrim(index)); |
| 211 | } |
| 212 | |
| 213 | /* |
| 214 | * (non-Javadoc) |
| 215 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readInt(java.lang.String) |
| 216 | */ |
| 217 | public int readInt(String name) { |
| 218 | return readInt(indexOf(name)); |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * (non-Javadoc) |
| 223 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readInt(int, |
| 224 | * int) |
| 225 | */ |
| 226 | public int readInt(int index, int defaultValue) { |
| 227 | String value = readAndTrim(index); |
| 228 | |
| 229 | return StringUtils.hasLength(value) ? Integer.parseInt(value) : defaultValue; |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * (non-Javadoc) |
| 234 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readInt(java.lang.String, |
| 235 | * int) |
| 236 | */ |
| 237 | public int readInt(String name, int defaultValue) { |
| 238 | return readInt(indexOf(name), defaultValue); |
| 239 | } |
| 240 | |
| 241 | /* |
| 242 | * (non-Javadoc) |
| 243 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readLong(int) |
| 244 | */ |
| 245 | public long readLong(int index) { |
| 246 | return Long.parseLong(readAndTrim(index)); |
| 247 | } |
| 248 | |
| 249 | /* |
| 250 | * (non-Javadoc) |
| 251 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readLong(java.lang.String) |
| 252 | */ |
| 253 | public long readLong(String name) { |
| 254 | return readLong(indexOf(name)); |
| 255 | } |
| 256 | |
| 257 | /* |
| 258 | * (non-Javadoc) |
| 259 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readLong(int, |
| 260 | * long) |
| 261 | */ |
| 262 | public long readLong(int index, long defaultValue) { |
| 263 | String value = readAndTrim(index); |
| 264 | |
| 265 | return StringUtils.hasLength(value) ? Long.parseLong(value) : defaultValue; |
| 266 | } |
| 267 | |
| 268 | /* |
| 269 | * (non-Javadoc) |
| 270 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readLong(java.lang.String, |
| 271 | * long) |
| 272 | */ |
| 273 | public long readLong(String name, long defaultValue) { |
| 274 | return readLong(indexOf(name), defaultValue); |
| 275 | } |
| 276 | |
| 277 | /* |
| 278 | * (non-Javadoc) |
| 279 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readFloat(int) |
| 280 | */ |
| 281 | public float readFloat(int index) { |
| 282 | return Float.parseFloat(readAndTrim(index)); |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * (non-Javadoc) |
| 287 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readFloat(java.lang.String) |
| 288 | */ |
| 289 | public float readFloat(String name) { |
| 290 | return readFloat(indexOf(name)); |
| 291 | } |
| 292 | |
| 293 | /* |
| 294 | * (non-Javadoc) |
| 295 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDouble(int) |
| 296 | */ |
| 297 | public double readDouble(int index) { |
| 298 | return Double.parseDouble(readAndTrim(index)); |
| 299 | } |
| 300 | |
| 301 | /* |
| 302 | * (non-Javadoc) |
| 303 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDouble(java.lang.String) |
| 304 | */ |
| 305 | public double readDouble(String name) { |
| 306 | return readDouble(indexOf(name)); |
| 307 | } |
| 308 | |
| 309 | /* |
| 310 | * (non-Javadoc) |
| 311 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBigDecimal(int) |
| 312 | */ |
| 313 | public BigDecimal readBigDecimal(int index) { |
| 314 | return readBigDecimal(index, null); |
| 315 | } |
| 316 | |
| 317 | /* |
| 318 | * (non-Javadoc) |
| 319 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBigDecimal(java.lang.String) |
| 320 | */ |
| 321 | public BigDecimal readBigDecimal(String name) { |
| 322 | return readBigDecimal(name, null); |
| 323 | } |
| 324 | |
| 325 | /* |
| 326 | * (non-Javadoc) |
| 327 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBigDecimal(int, |
| 328 | * java.math.BigDecimal) |
| 329 | */ |
| 330 | public BigDecimal readBigDecimal(int index, BigDecimal defaultValue) { |
| 331 | String candidate = readAndTrim(index); |
| 332 | |
| 333 | try { |
| 334 | return (StringUtils.hasText(candidate)) ? new BigDecimal(candidate) : defaultValue; |
| 335 | } |
| 336 | catch (NumberFormatException e) { |
| 337 | throw new IllegalArgumentException("Unparseable number: " + candidate); |
| 338 | } |
| 339 | } |
| 340 | |
| 341 | /* |
| 342 | * (non-Javadoc) |
| 343 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readBigDecimal(java.lang.String, |
| 344 | * java.math.BigDecimal) |
| 345 | */ |
| 346 | public BigDecimal readBigDecimal(String name, BigDecimal defaultValue) { |
| 347 | try { |
| 348 | return readBigDecimal(indexOf(name), defaultValue); |
| 349 | } |
| 350 | catch (IllegalArgumentException e) { |
| 351 | throw new IllegalArgumentException(e.getMessage() + ", name: [" + name + "]"); |
| 352 | } |
| 353 | } |
| 354 | |
| 355 | /* |
| 356 | * (non-Javadoc) |
| 357 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDate(int) |
| 358 | */ |
| 359 | public Date readDate(int index) { |
| 360 | return readDate(index, DEFAULT_DATE_PATTERN); |
| 361 | } |
| 362 | |
| 363 | /* |
| 364 | * (non-Javadoc) |
| 365 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDate(java.lang.String) |
| 366 | */ |
| 367 | public Date readDate(String name) { |
| 368 | return readDate(name, DEFAULT_DATE_PATTERN); |
| 369 | } |
| 370 | |
| 371 | /* |
| 372 | * (non-Javadoc) |
| 373 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDate(int, |
| 374 | * java.lang.String) |
| 375 | */ |
| 376 | public Date readDate(int index, String pattern) { |
| 377 | SimpleDateFormat sdf = new SimpleDateFormat(pattern); |
| 378 | sdf.setLenient(false); |
| 379 | Date date; |
| 380 | String value = readAndTrim(index); |
| 381 | try { |
| 382 | date = sdf.parse(value); |
| 383 | } |
| 384 | catch (ParseException e) { |
| 385 | throw new IllegalArgumentException(e.getMessage() + ", pattern: [" + pattern + "]"); |
| 386 | } |
| 387 | return date; |
| 388 | } |
| 389 | |
| 390 | /* |
| 391 | * (non-Javadoc) |
| 392 | * @see org.springframework.batch.io.file.mapping.IFieldSet#readDate(java.lang.String, |
| 393 | * java.lang.String) |
| 394 | */ |
| 395 | public Date readDate(String name, String pattern) { |
| 396 | try { |
| 397 | return readDate(indexOf(name), pattern); |
| 398 | } |
| 399 | catch (IllegalArgumentException e) { |
| 400 | throw new IllegalArgumentException(e.getMessage() + ", name: [" + name + "]"); |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | /* |
| 405 | * (non-Javadoc) |
| 406 | * @see org.springframework.batch.io.file.mapping.IFieldSet#getFieldCount() |
| 407 | */ |
| 408 | public int getFieldCount() { |
| 409 | return tokens.length; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * Read and trim the {@link String} value at '<code>index</code>'. |
| 414 | * |
| 415 | * @throws NullPointerException if the field value is <code>null</code>. |
| 416 | */ |
| 417 | protected String readAndTrim(int index) { |
| 418 | String value = tokens[index]; |
| 419 | |
| 420 | if (value != null) { |
| 421 | return value.trim(); |
| 422 | } |
| 423 | else { |
| 424 | return null; |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | /** |
| 429 | * Read and trim the {@link String} value from column with given '<code>name</code>. |
| 430 | * |
| 431 | * @throws IllegalArgumentException if a column with given name is not |
| 432 | * defined. |
| 433 | */ |
| 434 | protected int indexOf(String name) { |
| 435 | if (names == null) { |
| 436 | throw new IllegalArgumentException("Cannot access columns by name without meta data"); |
| 437 | } |
| 438 | int index = names.indexOf(name); |
| 439 | if (index >= 0) { |
| 440 | return index; |
| 441 | } |
| 442 | throw new IllegalArgumentException("Cannot access column [" + name + "] from " + names); |
| 443 | } |
| 444 | |
| 445 | public String toString() { |
| 446 | if (names != null) { |
| 447 | return getProperties().toString(); |
| 448 | } |
| 449 | |
| 450 | return tokens == null ? "" : Arrays.asList(tokens).toString(); |
| 451 | } |
| 452 | |
| 453 | /** |
| 454 | * @see java.lang.Object#equals(java.lang.Object) |
| 455 | */ |
| 456 | public boolean equals(Object object) { |
| 457 | if (object instanceof DefaultFieldSet) { |
| 458 | DefaultFieldSet fs = (DefaultFieldSet) object; |
| 459 | |
| 460 | if (this.tokens == null) { |
| 461 | return fs.tokens == null; |
| 462 | } |
| 463 | else { |
| 464 | return Arrays.equals(this.tokens, fs.tokens); |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | return false; |
| 469 | } |
| 470 | |
| 471 | public int hashCode() { |
| 472 | // this algorithm was taken from java 1.5 jdk Arrays.hashCode(Object[]) |
| 473 | if (tokens == null) { |
| 474 | return 0; |
| 475 | } |
| 476 | |
| 477 | int result = 1; |
| 478 | |
| 479 | for (int i = 0; i < tokens.length; i++) { |
| 480 | result = 31 * result + (tokens[i] == null ? 0 : tokens[i].hashCode()); |
| 481 | } |
| 482 | |
| 483 | return result; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * (non-Javadoc) |
| 488 | * @see org.springframework.batch.io.file.mapping.IFieldSet#getProperties() |
| 489 | */ |
| 490 | public Properties getProperties() { |
| 491 | if (names == null) { |
| 492 | throw new IllegalStateException("Cannot create properties without meta data"); |
| 493 | } |
| 494 | Properties props = new Properties(); |
| 495 | for (int i = 0; i < tokens.length; i++) { |
| 496 | String value = readAndTrim(i); |
| 497 | if (value != null) { |
| 498 | props.setProperty((String) names.get(i), value); |
| 499 | } |
| 500 | } |
| 501 | return props; |
| 502 | } |
| 503 | |
| 504 | } |