hussam.math.operations.extra
Class CustomFunctionFactory

java.lang.Object
hussam.math.operations.factory.OperatorFactoryImpl<Function>
hussam.math.operations.extra.CustomFunctionFactory

All Implemented Interfaces:

OperatorFactory<Function>, java.lang.Comparable<Operator>

Direct Known Subclasses:

DynamicFunctionFactory

public class CustomFunctionFactory
extends OperatorFactoryImpl<Function>

This is custom function factory. This can be used to create custom function. when you create a custom factory add it to a dataSource. OperatorFactoryDB

Author:

Hussam AlMulhim حسام الملحم

See Also:

OperatorFactoryDB

CustomFunctionFactory

public CustomFunctionFactory(OperatorSource source,
                             java.lang.String name,
                             java.lang.String description,
                             java.lang.String expression)

Creates a new Factory given the expression.

CustomFunctionFactory fac=new CustomFunctionFactory(OperatorFactoryDB.getInstance(), "Add", adds two arguments", "x+y");
 Function f=fac.getNewOperator();
 f.setOperation(0, 10);
 f.setOperation(1,30);
 System.out.println(f.result()); // output: 40

Parameters:

source - The dataSource from which the expression will be evaluted.

name - The name of the function.

description - The description of the function.

expression - The expression.

createReader

protected OperationReader createReader()

Prepares the reader. This is called after the constructor is called.

prepareReader

protected void prepareReader()

getDefaultArgumentCount

public int getDefaultArgumentCount()

Description copied from interface: OperatorFactory

Returns the default number of arguments for this operator.

Specified by:

getDefaultArgumentCount in interface OperatorFactory<Function>

Overrides:

getDefaultArgumentCount in class OperatorFactoryImpl<Function>

Returns:

the default argument count for this operator.

getVariable

public java.lang.String getVariable(int i)

Returns the name of the variable at the specified index. Important note: The variables are sorted in alphbatical order.

Parameters:

i - index number.

Returns:

the name of the variable.

getNewOperator

public Function getNewOperator()

Description copied from interface: OperatorFactory

Returns a new Operator.

Returns:

The new Operator.

getExpression

public java.lang.String getExpression()

Returns the expression.

Returns:

The expression.

setExpression

protected void setExpression(java.lang.String exp)

changes the expression.

Parameters:

exp - The new expression for this factory.

getOperatorSource

public OperatorSource getOperatorSource()

Returns the operator source used by this factory.

Returns:

the operatorsource.

toString

public java.lang.String toString()

Description copied from class: OperatorFactoryImpl

Returns a description of this factory.

Overrides:

toString in class OperatorFactoryImpl<Function>

Returns:

a description.