Mercurial > dive4elements > river
comparison artifacts/src/main/java/org/dive4elements/river/artifacts/datacage/templating/FunctionResolver.java @ 7968:09c9920e6f24
Added dc:coalesce(a, b). Returns first element which is not empty or not zero.
| author | Sascha L. Teichmann <teichmann@intevation.de> |
|---|---|
| date | Thu, 26 Jun 2014 12:54:31 +0200 |
| parents | 6d5cbd69511a |
| children | 912cf4ec09d1 |
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| 7967:6d5cbd69511a | 7968:09c9920e6f24 |
|---|---|
| 84 public FunctionResolver(Builder.BuildHelper buildHelper) { | 84 public FunctionResolver(Builder.BuildHelper buildHelper) { |
| 85 this.buildHelper = buildHelper; | 85 this.buildHelper = buildHelper; |
| 86 | 86 |
| 87 functions = new HashMap<String, Entry>(); | 87 functions = new HashMap<String, Entry>(); |
| 88 | 88 |
| 89 addFunction("coalesce", 2, new XPathFunction() { | |
| 90 @Override | |
| 91 public Object evaluate(List args) throws XPathFunctionException { | |
| 92 return coalesce(args); | |
| 93 } | |
| 94 }); | |
| 95 | |
| 89 addFunction("lowercase", 1, new XPathFunction() { | 96 addFunction("lowercase", 1, new XPathFunction() { |
| 90 @Override | 97 @Override |
| 91 public Object evaluate(List args) throws XPathFunctionException { | 98 public Object evaluate(List args) throws XPathFunctionException { |
| 92 return args.get(0).toString().toLowerCase(); | 99 return args.get(0).toString().toLowerCase(); |
| 93 } | 100 } |
| 544 | 551 |
| 545 return list instanceof Number | 552 return list instanceof Number |
| 546 ? (Number)list | 553 ? (Number)list |
| 547 : Double.valueOf(-Double.MAX_VALUE); | 554 : Double.valueOf(-Double.MAX_VALUE); |
| 548 } | 555 } |
| 556 | |
| 557 public static Object coalesce(List list) { | |
| 558 for (Object x: list) { | |
| 559 if (x instanceof String && ((String)x).length() != 0) { | |
| 560 return x; | |
| 561 } | |
| 562 if (x instanceof Number && ((Number)x).doubleValue() != 0.0) { | |
| 563 return x; | |
| 564 } | |
| 565 } | |
| 566 return StackFrames.NULL; | |
| 567 } | |
| 549 } | 568 } |
| 550 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : | 569 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |