FunctionRegistry (RDF4J: Query algebra - evaluation 4.3.9 API)

java.lang.Object
- org.eclipse.rdf4j.common.lang.service.ServiceRegistry<String,Function>
- - org.eclipse.rdf4j.query.algebra.evaluation.function.FunctionRegistry

```
public class FunctionRegistry
extends org.eclipse.rdf4j.common.lang.service.ServiceRegistry<String,Function>
```
A ServiceRegistry for implementations of the Function interface. Functions are registered by their IRI.

Author:

Arjohn Kampman

Field Summary
- Fields inherited from class org.eclipse.rdf4j.common.lang.service.ServiceRegistry
  logger, services

Constructor Summary

Constructors
Constructor Description

FunctionRegistry()

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static FunctionRegistry`	`getInstance()`	Gets the default FunctionRegistry.
`protected String`	`getKey(Function function)`

Methods inherited from class org.eclipse.rdf4j.common.lang.service.ServiceRegistry
add, get, getAll, getKeys, has, remove

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

- Constructor Detail
  - FunctionRegistry
```
public FunctionRegistry()
```
- Method Detail
  - getInstance
```
public static FunctionRegistry getInstance()
```
    Gets the default FunctionRegistry.
    
    Returns:
    
    The default registry.
  - getKey
```
protected String getKey(Function function)
```
    Specified by:
    
    getKey in class org.eclipse.rdf4j.common.lang.service.ServiceRegistry<String,Function>