Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/FunctionResolver.java @ 7383:36a194156f15
Datacage: Added dc:min-number(list) and dc:max-number(list) to extract the numerical
minimum/maximum from a list of numbers.
Example:
dc:min-number(dc:find-all('\d{4}', '1919 1291 1299 3029'))
returns
1291
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Fri, 18 Oct 2013 18:36:18 +0200 |
| parents | 420eb5a5fde4 |
| children | ef310e272fb5 |
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| 7382:420eb5a5fde4 | 7383:36a194156f15 |
|---|---|
| 183 && needle instanceof String | 183 && needle instanceof String |
| 184 ? findAll((String)needle, (String)haystack) | 184 ? findAll((String)needle, (String)haystack) |
| 185 : Collections.<String>emptyList(); | 185 : Collections.<String>emptyList(); |
| 186 } | 186 } |
| 187 }); | 187 }); |
| 188 | |
| 189 addFunction("max-number", 1, new XPathFunction() { | |
| 190 @Override | |
| 191 public Object evaluate(List args) throws XPathFunctionException { | |
| 192 return maxNumber(args.get(0)); | |
| 193 } | |
| 194 }); | |
| 195 | |
| 196 addFunction("min-number", 1, new XPathFunction() { | |
| 197 @Override | |
| 198 public Object evaluate(List args) throws XPathFunctionException { | |
| 199 return minNumber(args.get(0)); | |
| 200 } | |
| 201 }); | |
| 188 } | 202 } |
| 189 | 203 |
| 190 /** | 204 /** |
| 191 * Create a new function. | 205 * Create a new function. |
| 192 * @param name Name of the function. | 206 * @param name Name of the function. |
| 435 while (matcher.find()) { | 449 while (matcher.find()) { |
| 436 result.add(matcher.group()); | 450 result.add(matcher.group()); |
| 437 } | 451 } |
| 438 return result; | 452 return result; |
| 439 } | 453 } |
| 454 | |
| 455 public Number maxNumber(Object list) { | |
| 456 if (list instanceof Collection) { | |
| 457 Collection collection = (Collection)list; | |
| 458 double max = -Double.MAX_VALUE; | |
| 459 for (Object x: collection) { | |
| 460 Number n; | |
| 461 if (x instanceof Number) { | |
| 462 n = (Number)x; | |
| 463 } | |
| 464 else if (x instanceof String) { | |
| 465 try { | |
| 466 n = Double.valueOf((String)x); | |
| 467 } | |
| 468 catch (NumberFormatException nfe) { | |
| 469 log.warn("'" + x + "' is not a number."); | |
| 470 continue; | |
| 471 } | |
| 472 } | |
| 473 else { | |
| 474 log.warn("'" + x + "' is not a number."); | |
| 475 continue; | |
| 476 } | |
| 477 | |
| 478 double v = n.doubleValue(); | |
| 479 | |
| 480 if (v > max) { | |
| 481 max = v; | |
| 482 } | |
| 483 } | |
| 484 | |
| 485 return Double.valueOf(max == -Double.MAX_VALUE | |
| 486 ? Double.MAX_VALUE | |
| 487 : max); | |
| 488 } | |
| 489 | |
| 490 return list instanceof Number | |
| 491 ? (Number)list | |
| 492 : Double.valueOf(Double.MAX_VALUE); | |
| 493 } | |
| 494 | |
| 495 public Number minNumber(Object list) { | |
| 496 if (list instanceof Collection) { | |
| 497 Collection collection = (Collection)list; | |
| 498 double min = Double.MAX_VALUE; | |
| 499 for (Object x: collection) { | |
| 500 Number n; | |
| 501 if (x instanceof Number) { | |
| 502 n = (Number)x; | |
| 503 } | |
| 504 else if (x instanceof String) { | |
| 505 try { | |
| 506 n = Double.valueOf((String)x); | |
| 507 } | |
| 508 catch (NumberFormatException nfe) { | |
| 509 log.warn("'" + x + "' is not a number."); | |
| 510 continue; | |
| 511 } | |
| 512 } | |
| 513 else { | |
| 514 log.warn("'" + x + "' is not a number."); | |
| 515 continue; | |
| 516 } | |
| 517 | |
| 518 double v = n.doubleValue(); | |
| 519 | |
| 520 if (v < min) { | |
| 521 min = v; | |
| 522 } | |
| 523 } | |
| 524 | |
| 525 return Double.valueOf(min == Double.MAX_VALUE | |
| 526 ? -Double.MAX_VALUE | |
| 527 : min); | |
| 528 } | |
| 529 | |
| 530 return list instanceof Number | |
| 531 ? (Number)list | |
| 532 : Double.valueOf(-Double.MAX_VALUE); | |
| 533 } | |
| 440 } | 534 } |
| 441 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : | 535 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |