GenericHigherOrderFunctionFactory (org.ow2.authzforce:authzforce-ce-core-pdp-api 18.0.1 API)

java.lang.Object
- org.ow2.authzforce.core.pdp.api.func.GenericHigherOrderFunctionFactory

All Implemented Interfaces:

PdpExtension
```
public abstract class GenericHigherOrderFunctionFactory
extends Object
implements PdpExtension
```
Interface for generic higher-order function factories, such as the one used for the standard map function in Authzforce PDP engine. A generic function is a function class with a type parameter depending on the sub-function's return type, e.g. the standard map function, therefore the function is instantiated for a specific sub-function's return type.

Version:

$Id: $

Field Summary
- Fields inherited from interface org.ow2.authzforce.core.pdp.api.PdpExtension
  AUTHZFORCE_EXTENSION_PREFIX

Constructor Summary

Constructors
Constructor Description

GenericHigherOrderFunctionFactory()

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods
Modifier and Type	Method	Description
`abstract <SUB_RETURN_T extends AttributeValue> HigherOrderBagFunction<?,SUB_RETURN_T>`	`getInstance(Datatype<SUB_RETURN_T> subFunctionReturnType)`	Returns instance of the Higher-order function
`String`	`toString()`

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

Methods inherited from interface org.ow2.authzforce.core.pdp.api.PdpExtension
getId

- Constructor Detail
  - GenericHigherOrderFunctionFactory
```
public GenericHigherOrderFunctionFactory()
```
- Method Detail
  - getInstance
```
public abstract <SUB_RETURN_T extends AttributeValue> HigherOrderBagFunction<?,SUB_RETURN_T> getInstance(Datatype<SUB_RETURN_T> subFunctionReturnType)
                                                                                                        throws IllegalArgumentException
```
    Returns instance of the Higher-order function
    
    Parameters:
    
    subFunctionReturnType - sub-function's return datatype
    
    Returns:
    
    higher-order function instance (non-null, throw exceptions below if cannot return instance)
    
    Throws:
    
    IllegalArgumentException - iff subFunctionReturnType == null or subFunctionReturnType is not compatible with this factory (i.e. map function only accepts primitive datatype as subfunction's return type
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object