Package org.djutils.eval

Class F2

java.lang.Object

org.djutils.eval.F2

All Implemented Interfaces:

Identifiable, Function

class F2
extends Object
implements Function

F2.java. Minimal implementation of two-argument Function with description.

Copyright (c) 2023-2025 Delft University of Technology, Jaffalaan 5, 2628 BX Delft, the Netherlands. All rights reserved. See for project information https://djutils.org. The DJUTILS project is distributed under a three-clause BSD-style license, which can be found at https://djutils.org/docs/license.html.

Author:

Peter Knoppers

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static interface	F2.TwoArgumentFunction	Interface for two-argument functions.

Field Summary

Fields

Modifier and Type	Field	Description
(package private) final F2.TwoArgumentFunction	f2	The zero argument function.
(package private) final String	id	Id of the function.
(package private) final MetaData	metaData	Type of the parameters of this function (also contains name and description).

Constructor Summary

Constructors

Constructor	Description
F2(String id, MetaData metaData, F2.TwoArgumentFunction f2)	Construct a new two-argument function.

Method Summary

Modifier and Type	Method	Description
Object	function(Object[] arguments)	The function itself.
String	getId()
MetaData	getMetaData()	Specifies the types of the arguments expected by the function.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.djutils.eval.Function

getDescription, getName

Field Details

id

final String id

Id of the function.

metaData

final MetaData metaData

Type of the parameters of this function (also contains name and description).

f2

final F2.TwoArgumentFunction f2

The zero argument function.

Constructor Details

F2

F2(String id,
 MetaData metaData,
 F2.TwoArgumentFunction f2)

Construct a new two-argument function.

Parameters:

id - name of the function as it must be written in expressions

metaData - meta data of the function

f2 - two argument function

Method Details

getId

public String getId()

Specified by:

getId in interface Identifiable

getMetaData

public MetaData getMetaData()

Description copied from interface: Function

Specifies the types of the arguments expected by the function.

Specified by:

getMetaData in interface Function

Returns:

specification of the arguments expected by the function

function

public Object function(Object[] arguments)
                throws RuntimeException

Description copied from interface: Function

The function itself.

Specified by:

function in interface Function

Parameters:

arguments - the arguments of the function

Returns:

the result of the function (must currently be either some type of DoubleScalar or Boolean).

Throws:

RuntimeException - thrown when the function is unable to produce a result