sascha@998: package de.intevation.flys.artifacts.datacage.templating; sascha@998: teichmann@4949: import java.util.ArrayList; sascha@998: import java.util.Collection; teichmann@4949: import java.util.List; sascha@998: import java.util.Map; sascha@998: teichmann@4949: import javax.xml.namespace.QName; teichmann@4949: sascha@998: import javax.xml.xpath.XPathFunction; sascha@998: import javax.xml.xpath.XPathFunctionException; teichmann@4949: import javax.xml.xpath.XPathFunctionResolver; sascha@998: sascha@998: import org.apache.log4j.Logger; sascha@998: felix@4594: felix@4594: /** Resolves functions (e.g. dc:contains) in Datacage/Meta-Data system. */ sascha@998: public class FunctionResolver sascha@998: implements XPathFunctionResolver sascha@998: { felix@4594: /** Home logger. */ sascha@998: private static Logger log = Logger.getLogger(FunctionResolver.class); sascha@998: sascha@998: public static final String FUNCTION_NAMESPACE_URI = "dc"; sascha@998: sascha@998: public static final class Entry { sascha@998: sascha@998: String name; sascha@998: XPathFunction function; sascha@998: int arity; sascha@998: sascha@998: public Entry() { sascha@998: } sascha@998: sascha@998: public Entry(String name, XPathFunction function, int arity) { sascha@998: this.name = name; sascha@998: this.function = function; sascha@998: this.arity = arity; sascha@998: } sascha@998: } // class Entry sascha@998: sascha@998: public static final FunctionResolver FUNCTIONS = new FunctionResolver(); sascha@998: sascha@998: static { felix@1930: /** Implementation of case-ignoring dc:contains. */ sascha@998: FUNCTIONS.addFunction("contains", 2, new XPathFunction() { sascha@998: @Override sascha@998: public Object evaluate(List args) throws XPathFunctionException { sascha@998: Object haystack = args.get(0); sascha@998: Object needle = args.get(1); sascha@1716: sascha@1716: if (needle instanceof String) { sascha@1716: needle = ((String)needle).toUpperCase(); sascha@1716: } sascha@1716: sascha@998: try { sascha@998: if (haystack instanceof Collection) { sascha@998: return Boolean.valueOf( sascha@998: ((Collection)haystack).contains(needle)); sascha@998: } sascha@998: sascha@998: if (haystack instanceof Map) { sascha@998: return Boolean.valueOf( sascha@998: ((Map)haystack).containsKey(needle)); sascha@998: } sascha@998: sascha@998: if (haystack instanceof Object []) { sascha@998: for (Object straw: (Object [])haystack) { sascha@998: if (straw.equals(needle)) { sascha@998: return Boolean.TRUE; sascha@998: } sascha@998: } sascha@998: } sascha@998: sascha@998: return Boolean.FALSE; sascha@998: } sascha@998: catch (Exception e) { sascha@998: log.error(e); sascha@998: throw new XPathFunctionException(e); sascha@998: } sascha@998: } sascha@998: }); sascha@998: } sascha@998: rrenkert@4902: static { rrenkert@4902: /** Implementation for getting the minimum value of location or distance rrenkert@4902: * dc:fromValue. */ rrenkert@4902: FUNCTIONS.addFunction("fromValue", 3, new XPathFunction() { rrenkert@4902: @Override rrenkert@4902: public Object evaluate(List args) throws XPathFunctionException { rrenkert@4902: Object mode = args.get(0); rrenkert@4902: Object locations = args.get(1); rrenkert@4902: Object from = args.get(2); rrenkert@4902: rrenkert@4902: if (!(mode instanceof String)){ rrenkert@5164: return -99999d; rrenkert@4902: } rrenkert@4902: rrenkert@4902: if (mode.equals("locations")) { rrenkert@4902: if (!(locations instanceof String)) { rrenkert@5164: return -99999d; rrenkert@4902: } teichmann@4926: String loc = ((String)locations).replace(" ", ""); teichmann@4926: String[] split = loc.split(","); teichmann@4926: if (split.length < 1) { rrenkert@5164: return -99999d; teichmann@4926: } teichmann@4926: try { teichmann@4926: double min = Double.parseDouble(split[0]); teichmann@4926: for (int i = 1; i < split.length; ++i) { teichmann@4926: double v = Double.parseDouble(split[i]); teichmann@4926: if (v < min) { teichmann@4926: min = v; teichmann@4926: } teichmann@4926: } teichmann@4926: return min; teichmann@4926: } teichmann@4926: catch (NumberFormatException nfe) { rrenkert@5164: return -99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: else if (mode.equals("distance")) { rrenkert@4902: if (!(from instanceof String)) { rrenkert@5164: return -99999d; rrenkert@4902: } rrenkert@4902: String f = (String)from; rrenkert@4902: try { rrenkert@4902: return Double.parseDouble(f); rrenkert@4902: } rrenkert@4902: catch(NumberFormatException nfe) { rrenkert@5164: return -99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: else { rrenkert@5164: return -99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: }); rrenkert@4902: } rrenkert@4902: rrenkert@4902: static { rrenkert@4902: /** Implementation for getting the maximum value of location or distance rrenkert@4902: * dc:toValue. */ rrenkert@4902: FUNCTIONS.addFunction("toValue", 3, new XPathFunction() { rrenkert@4902: @Override rrenkert@4902: public Object evaluate(List args) throws XPathFunctionException { rrenkert@4902: Object mode = args.get(0); rrenkert@4902: Object locations = args.get(1); rrenkert@4902: Object to = args.get(2); rrenkert@4902: rrenkert@4902: if (!(mode instanceof String)){ rrenkert@5164: return 99999d; rrenkert@4902: } rrenkert@4902: rrenkert@4902: if (mode.equals("locations")) { rrenkert@4902: if (!(locations instanceof String)) { rrenkert@5164: return 99999d; rrenkert@4902: } teichmann@4926: try { rrenkert@4902: String loc = ((String)locations).replace(" ", ""); rrenkert@4902: String[] split = loc.split(","); teichmann@4926: if (split.length < 1) { rrenkert@5164: return 99999d; teichmann@4926: } teichmann@4926: double max = Double.parseDouble(split[0]); teichmann@4926: for (int i = 1; i < split.length; ++i) { teichmann@4926: double v = Double.parseDouble(split[i]); teichmann@4926: if (v > max) { teichmann@4926: max = v; teichmann@4926: } teichmann@4926: } teichmann@4926: return max; teichmann@4926: } teichmann@4926: catch (NumberFormatException nfe) { rrenkert@5164: return 99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: else if (mode.equals("distance")) { rrenkert@4902: if (!(to instanceof String)) { rrenkert@5164: return 99999d; rrenkert@4902: } rrenkert@4902: else { rrenkert@4902: String t = (String)to; rrenkert@4902: try { rrenkert@4902: return Double.parseDouble(t); rrenkert@4902: } rrenkert@4902: catch(NumberFormatException nfe) { rrenkert@5164: return 99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: } rrenkert@4902: else { rrenkert@5164: return 99999d; rrenkert@4902: } rrenkert@4902: } rrenkert@4902: }); rrenkert@4902: } rrenkert@4902: felix@4594: /** List of functions. */ sascha@998: protected List functions; sascha@998: sascha@998: public FunctionResolver() { sascha@998: functions = new ArrayList(); sascha@998: } sascha@998: felix@4594: /** felix@4594: * Create a new function. felix@4594: * @param name Name of the function. felix@4594: * @param arity Number of arguments for function. felix@4594: * @param function the function itself. felix@4594: */ sascha@998: public void addFunction(String name, int arity, XPathFunction function) { sascha@998: functions.add(new Entry(name, function, arity)); sascha@998: } sascha@998: sascha@998: @Override sascha@998: public XPathFunction resolveFunction(QName functionName, int arity) { sascha@998: sascha@998: if (!functionName.getNamespaceURI().equals(FUNCTION_NAMESPACE_URI)) { sascha@998: return null; sascha@998: } sascha@998: sascha@998: String name = functionName.getLocalPart(); sascha@998: for (Entry entry: functions) { sascha@998: if (entry.arity == arity && entry.name.equals(name)) { sascha@998: return entry.function; sascha@998: } sascha@998: } sascha@998: sascha@998: return null; sascha@998: } sascha@998: } sascha@998: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :