Package org.pipservices3.expressions.calculator.functions

Class DefaultFunctionCollection

java.lang.Object

org.pipservices3.expressions.calculator.functions.FunctionCollection

org.pipservices3.expressions.calculator.functions.DefaultFunctionCollection

All Implemented Interfaces:

IFunctionCollection

public class DefaultFunctionCollection
extends FunctionCollection

Implements a list filled with standard functions.

Constructor Summary

Constructors

Constructor	Description
DefaultFunctionCollection()	Constructs this list and fills it with the standard functions.

Method Summary

Modifier and Type	Method	Description
protected void	checkParamCount(List<Variant> params, int expectedParamCount)	Checks if params contains the correct number of function parameters (must be stored on the top of the params).
protected Variant	getParameter(List<Variant> params, int paramIndex)	Gets function parameter by it's index.

Methods inherited from class org.pipservices3.expressions.calculator.functions.FunctionCollection

add, clear, findByName, findIndexByName, get, getAll, length, remove, removeByName

Methods inherited from class java.lang.Object

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

Constructor Details

DefaultFunctionCollection

public DefaultFunctionCollection()

Constructs this list and fills it with the standard functions.

Method Details

checkParamCount

protected void checkParamCount(List<Variant> params,
 int expectedParamCount)
                        throws ExpressionException

Checks if params contains the correct number of function parameters (must be stored on the top of the params).

Parameters:

params - A list of function parameters.

expectedParamCount - The expected number of function parameters.

Throws:

ExpressionException

getParameter

protected Variant getParameter(List<Variant> params,
 int paramIndex)

Gets function parameter by it's index.

Parameters:

params - A list of function parameters.

paramIndex - Index for the function parameter (0 for the first parameter).

Returns:

Function parameter value.