java.lang.Object

org.apache.felix.gogo.runtime.Expression.Function

Enclosing class:: Expression

public abstract class Expression.Function extends Object

Abstract definition of a supported expression function. A function is defined by a name, the number of parameters and the actual processing implementation.

Constructor Summary

Constructors

Constructor

Description

Function(String name, int numParams)

Creates a new function with given name and parameter count.
Method Summary

Modifier and Type

Method

Description

abstract BigDecimal

eval(List<BigDecimal> parameters)

Implementation for this function.

BigDecimal

eval(Map<String,Object> variables, List<Object> parameters)

String

getName()

int

getNumParams()

String

toString()

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details
- Function
  
  public Function(String name, int numParams)
  
  Creates a new function with given name and parameter count.
  
  Parameters:
  
  name - The name of the function.
  
  numParams - The number of parameters for this function.
Method Details
- getName
  
  public String getName()
- getNumParams
  
  public int getNumParams()
- eval
  
  public BigDecimal eval(Map<String,Object> variables, List<Object> parameters)
- eval
  
  public abstract BigDecimal eval(List<BigDecimal> parameters)
  
  Implementation for this function.
  
  Parameters:
  
  parameters - Parameters will be passed by the expression evaluator as a List of BigDecimal values.
  
  Returns:
  
  The function must return a new BigDecimal value as a computing result.
- toString
  
  public String toString()
  
  Overrides:
  
  toString in class Object

Class Expression.Function

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Details

Function

Method Details

getName

getNumParams

eval

eval

toString