Expression.Function (Apache Felix Gogo Runtime 0.16.2 API)

java.lang.Object
- org.apache.felix.gogo.runtime.Expression.Function

Enclosing class:

Expression
```
public abstract class Expression.Function
extends java.lang.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(java.lang.String name, int numParams)
Creates a new function with given name and parameter count.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract java.math.BigDecimal`	`eval(java.util.List<java.math.BigDecimal> parameters)`	Implementation for this function.
`java.math.BigDecimal`	`eval(java.util.Map<java.lang.String,java.lang.Object> variables, java.util.List<java.lang.Object> parameters)`
`java.lang.String`	`getName()`
`int`	`getNumParams()`
`java.lang.String`	`toString()`

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

- Constructor Detail
  - Function
```
public Function(java.lang.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 Detail
  - getName
```
public java.lang.String getName()
```
  - getNumParams
```
public int getNumParams()
```
  - eval
```
public java.math.BigDecimal eval(java.util.Map<java.lang.String,java.lang.Object> variables,
                                 java.util.List<java.lang.Object> parameters)
```
  - eval
```
public abstract java.math.BigDecimal eval(java.util.List<java.math.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 java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object