Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/templating/FunctionResolver.java @ 998:b81626b10cb7
Datacage: Moved templating in a better suited package.
flys-artifacts/trunk@2434 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 01 Aug 2011 08:31:09 +0000 |
| parents | |
| children | 3ca999f507b7 |
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| 997:4c82609824c8 | 998:b81626b10cb7 |
|---|---|
| 1 package de.intevation.flys.artifacts.datacage.templating; | |
| 2 | |
| 3 import java.util.List; | |
| 4 import java.util.Collection; | |
| 5 import java.util.Map; | |
| 6 import java.util.ArrayList; | |
| 7 | |
| 8 import javax.xml.xpath.XPathFunctionResolver; | |
| 9 import javax.xml.xpath.XPathFunction; | |
| 10 import javax.xml.xpath.XPathFunctionException; | |
| 11 | |
| 12 import javax.xml.namespace.QName; | |
| 13 | |
| 14 import org.apache.log4j.Logger; | |
| 15 | |
| 16 public class FunctionResolver | |
| 17 implements XPathFunctionResolver | |
| 18 { | |
| 19 private static Logger log = Logger.getLogger(FunctionResolver.class); | |
| 20 | |
| 21 public static final String FUNCTION_NAMESPACE_URI = "dc"; | |
| 22 | |
| 23 public static final class Entry { | |
| 24 | |
| 25 String name; | |
| 26 XPathFunction function; | |
| 27 int arity; | |
| 28 | |
| 29 public Entry() { | |
| 30 } | |
| 31 | |
| 32 public Entry(String name, XPathFunction function, int arity) { | |
| 33 this.name = name; | |
| 34 this.function = function; | |
| 35 this.arity = arity; | |
| 36 } | |
| 37 } // class Entry | |
| 38 | |
| 39 public static final FunctionResolver FUNCTIONS = new FunctionResolver(); | |
| 40 | |
| 41 static { | |
| 42 FUNCTIONS.addFunction("contains", 2, new XPathFunction() { | |
| 43 @Override | |
| 44 public Object evaluate(List args) throws XPathFunctionException { | |
| 45 Object haystack = args.get(0); | |
| 46 Object needle = args.get(1); | |
| 47 try { | |
| 48 if (haystack instanceof Collection) { | |
| 49 return Boolean.valueOf( | |
| 50 ((Collection)haystack).contains(needle)); | |
| 51 } | |
| 52 | |
| 53 if (haystack instanceof Map) { | |
| 54 return Boolean.valueOf( | |
| 55 ((Map)haystack).containsKey(needle)); | |
| 56 } | |
| 57 | |
| 58 if (haystack instanceof Object []) { | |
| 59 for (Object straw: (Object [])haystack) { | |
| 60 if (straw.equals(needle)) { | |
| 61 return Boolean.TRUE; | |
| 62 } | |
| 63 } | |
| 64 } | |
| 65 | |
| 66 return Boolean.FALSE; | |
| 67 } | |
| 68 catch (Exception e) { | |
| 69 log.error(e); | |
| 70 throw new XPathFunctionException(e); | |
| 71 } | |
| 72 } | |
| 73 }); | |
| 74 } | |
| 75 | |
| 76 protected List<Entry> functions; | |
| 77 | |
| 78 public FunctionResolver() { | |
| 79 functions = new ArrayList<Entry>(); | |
| 80 } | |
| 81 | |
| 82 public void addFunction(String name, int arity, XPathFunction function) { | |
| 83 functions.add(new Entry(name, function, arity)); | |
| 84 } | |
| 85 | |
| 86 @Override | |
| 87 public XPathFunction resolveFunction(QName functionName, int arity) { | |
| 88 | |
| 89 if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) { | |
| 90 return null; | |
| 91 } | |
| 92 | |
| 93 String name = functionName.getLocalPart(); | |
| 94 for (Entry entry: functions) { | |
| 95 if (entry.arity == arity && entry.name.equals(name)) { | |
| 96 return entry.function; | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 return null; | |
| 101 } | |
| 102 } | |
| 103 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |