org.expressionj.functions

Class ConstantsDefinitions

java.lang.Object

org.expressionj.functions.ConstantsDefinitions

public class ConstantsDefinitions
extends java.lang.Object

This singleton class allows to bind names in the mathematical expressions to global constants.

Method Summary

Modifier and Type	Method and Description
void	addConstant(java.lang.String name, Constant constant) Add a new global constant binding.
Constant	getConstant(java.lang.String name) Return the constant of a given name.
java.util.Map<java.lang.String,Constant>	getConstants() Return the Map of constants.
static ConstantsDefinitions	getInstance() Return the unique instance.
boolean	hasConstant(java.lang.String name) Return true if there is a constant with a specified name.
void	reset() Reset all the bindings.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static ConstantsDefinitions getInstance()

Return the unique instance.

Returns:

the unique instance

reset

public void reset()

Reset all the bindings.

getConstants

public java.util.Map<java.lang.String,Constant> getConstants()

Return the Map of constants.

Returns:

the Map of constants

hasConstant

public boolean hasConstant(java.lang.String name)

Return true if there is a constant with a specified name.

Parameters:

name - the constant name

Returns:

true if there is a constant with the specified name

getConstant

public Constant getConstant(java.lang.String name)

Return the constant of a given name.

Parameters:

name - the constant name

Returns:

the constant

addConstant

public void addConstant(java.lang.String name,
                        Constant constant)

Add a new global constant binding.

Parameters:

name - the constant name

constant - the constant