org.mmbase.util.functions

Class FunctionSets

java.lang.Object

org.mmbase.util.functions.FunctionSets

public class FunctionSets
extends Object

A utility class for maintaining and querying functionsets. A set function belongs to a certain namespace of functions ('sets'), and therefore is identified by two strings: The name of the 'set' and the name of the function.
Function sets can be defined in the functions/functionsets.xml configuration file.
This class implements a number of static methods for maintaining FunctionSet objects, and filling these with FunctionSet objects that match the namespace. It also implements a getFunction(java.lang.String, java.lang.String) method for obtaining a function from such a set.

Since:

MMBase-1.8

Version:

$Id$

Author:

Daniël Ockeloen, Michiel Meeuwissen

Field Summary

Fields

Modifier and Type	Field and Description
static String	DTD_FUNCTIONSET_1_0
static String	DTD_FUNCTIONSETS_1_0
static String	FUNCTIONSET_NS
static String	PUBLIC_ID_FUNCTIONSET_1_0
static String	PUBLIC_ID_FUNCTIONSETS_1_0

Constructor Summary

Constructors

Constructor and Description
FunctionSets()

Method Summary

Modifier and Type	Method and Description
static Function<?>	getFunction(String setName, String functionName) Returns the Function with the given function name, and which exists in the set with the given set name.
static FunctionSet	getFunctionSet(String setName) Returns the FunctionSet with the given set name.
static Map<String,FunctionSet>	getFunctionSets()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DTD_FUNCTIONSET_1_0

public static final String DTD_FUNCTIONSET_1_0

See Also:

Constant Field Values

DTD_FUNCTIONSETS_1_0

public static final String DTD_FUNCTIONSETS_1_0

See Also:

Constant Field Values

PUBLIC_ID_FUNCTIONSET_1_0

public static final String PUBLIC_ID_FUNCTIONSET_1_0

See Also:

Constant Field Values

PUBLIC_ID_FUNCTIONSETS_1_0

public static final String PUBLIC_ID_FUNCTIONSETS_1_0

See Also:

Constant Field Values

FUNCTIONSET_NS

public static final String FUNCTIONSET_NS

See Also:

Constant Field Values

Constructor Detail

FunctionSets

public FunctionSets()

Method Detail

getFunction

public static Function<?> getFunction(String setName,
                                      String functionName)

Returns the Function with the given function name, and which exists in the set with the given set name. If this is the first call, or if the set does not exist in the cache, the cache is refreshed by reading the functionset.xml configuration file.

Parameters:

setName - the name of the function set

functionName - the name of the function

Returns:

the Function, or nulll if either the fucntion or set is not defined

getFunctionSet

public static FunctionSet getFunctionSet(String setName)

Returns the FunctionSet with the given set name. If this is the first call, or if the set does not exist in the cache, the cache is refreshed by reading the functionset.xml configuration file. configuration file.

Parameters:

setName - the name of the function set

Returns:

the FunctionSet, or null if the set is not defined

getFunctionSets

public static Map<String,FunctionSet> getFunctionSets()

Since:

MMBase-1.9