fr.expression4j.core.impl
Class CatalogImpl

java.lang.Object
  fr.expression4j.core.impl.CatalogImpl

All Implemented Interfaces:

Catalog

public class CatalogImpl
extends java.lang.Object
implements Catalog

Implementation of catalog interface.

 All catalog store the default functions derived from java Math class:
        - abs(x)
  - acos(x)
  - asin(x)
  - atan(x)
  - ceil(x)
  - cos(x)
  - cosh(x)
  - exp(x)
  - floor(x)
  - log(x)
  - random()
  - sin(x)
  - sinh(x)
  - sqrt(x)
  - tan(x)  
 
 and default constant
  - pi = 3.14159 ...
  - e  = 2,71828182845904523536028747135266249
 
 

Author:

SGINER

Field Summary

protected java.util.Map	catalog
protected java.util.Map	constant
protected java.lang.String	name

Constructor Summary

CatalogImpl(java.lang.String catalogName)

Method Summary

void	addConstant(java.lang.String name, MathematicalElement value) Add a constant to the catalog.
void	addExpression(Expression expression) add an expression to catalog.
MathematicalElement	getConstant(java.lang.String name) Get a constant from the catalog
Expression	getExpression(java.lang.String name) Get an expression from the catalog.
java.lang.String	getName() Get the catalog name.
java.util.List	listConstant() List all constant stored in catalog.
java.util.List	listExpression() List the content of the catalog
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

catalog

protected java.util.Map catalog

constant

protected java.util.Map constant

name

protected java.lang.String name

Constructor Detail

CatalogImpl

public CatalogImpl(java.lang.String catalogName)

Method Detail

addExpression

public void addExpression(Expression expression)

Description copied from interface: Catalog

add an expression to catalog.

Specified by:

addExpression in interface Catalog

Parameters:

expression - expression to add.

getExpression

public Expression getExpression(java.lang.String name)

Description copied from interface: Catalog

Get an expression from the catalog.

Specified by:

getExpression in interface Catalog

Parameters:

name - name of the expression to get

Returns:

the expression if found, null otherwise.

listExpression

public java.util.List listExpression()

Description copied from interface: Catalog

List the content of the catalog

Specified by:

listExpression in interface Catalog

Returns:

list of functions name.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

addConstant

public void addConstant(java.lang.String name,
                        MathematicalElement value)

Description copied from interface: Catalog

Add a constant to the catalog.

Specified by:

addConstant in interface Catalog

Parameters:

name - name of the constant.

value - value of the constant.

getConstant

public MathematicalElement getConstant(java.lang.String name)

Description copied from interface: Catalog

Get a constant from the catalog

Specified by:

getConstant in interface Catalog

Parameters:

name - constant name to get.

Returns:

the constant if found, null if not found.

listConstant

public java.util.List listConstant()

Description copied from interface: Catalog

List all constant stored in catalog.

Specified by:

listConstant in interface Catalog

Returns:

list of all constant stored in catalog a String.

getName

public java.lang.String getName()

Description copied from interface: Catalog

Get the catalog name.

Specified by:

getName in interface Catalog

Returns:

catalog name.