| java.lang.Object
 org.mmbase.util.functions.Functions
| Functions | | public class Functions (Code) | | This class defines static methods for defining Function and Parameters objects.
These methods include ways to retrieve Function definitions for a class using reflection,
and methods to convert a List to a Parameters object, and a Parameter array to a
List.
since:
MMBase-1.8
author:
Pierre van Rooden
author:
Daniel Ockeloen
author:
Michiel Meeuwissen
version:
$Id: Functions.java,v 1.17 2007/11/25 18:25:49 nklasens Exp $ |
| buildParameters | | public static Parameters buildParameters(Parameter[] def, List args)(Code) | | Converts a certain List to an Parameters if it is not already one.
|
| getParameterDefinitonsByReflection | | public static Map<String, Parameter<?>[]> getParameterDefinitonsByReflection(Class clazz, Map<String, Parameter<?>[]> map)(Code) | | Generates a map of Parameter[] objects for a given class through reflection.
The map keys are the names of te function the Parameter[] object belongs to.
The method parses the given class for constants (final static public members)
of type Parameter[]. The member name up to the first underscore in that name
is considered the name for a function supported by that class.
i.e. :
public final static Parameter[] AGE_PARAMETERS = {};
defines a function 'age' which takes no parameters.
public final static Parameter[] GUI_PARAMETERS = {
new Parameter("field", String.class),
Parameter.LANGUAGE
}
defines a function 'gui' which two parameters: 'field' and 'language'.
Results form reflection are stored in an internal cache.
The method returns the Parameter[] value (if any) of the function whose
name was given in the call. If the function cannot be derived through
reflection, the method returns null.
Note that, since this way of determining functions cannot determine
return value types, it is advised to use
FunctionProvider.addFunction instead.
See Also: Parameter
Parameters:
clazz - the class to perform reflection on.
Parameters:
map - A map of parameter definitions (Parameter[] objects), keys by function name (String) |
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