OcflExtensionRegistry (OCFL Java Core 0.2.0 API)

java.lang.Object
- edu.wisc.library.ocfl.core.extension.OcflExtensionRegistry

```
public final class OcflExtensionRegistry
extends Object
```
Registry for mapping extensions to their implementations. The following out-of-the-box extensions are pre-registered with a default implementation:
- 0002-flat-direct-storage-layout: FlatLayoutExtension
- 0003-hash-and-id-n-tuple-storage-layout: HashedNTupleIdEncapsulationLayoutExtension
- 0004-hashed-n-tuple-storage-layout: HashedNTupleLayoutExtension

Method Summary

All Methods Static Methods Concrete Methods
Modifier and Type	Method	Description
`static <T extends OcflExtension> Optional<T>`	`lookup(String extensionName)`	Returns a registered extension implementation, if one exists.
`static void`	`register(String extensionId, Class<? extends OcflExtension> extensionClass)`	Registers a new extension implementation.
`static void`	`remove(String extensionName)`	Removes an extension from the registry.

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

- Method Detail
  - register
```
public static void register(String extensionId,
                            Class<? extends OcflExtension> extensionClass)
```
    Registers a new extension implementation.
    
    Parameters:
    
    extensionId - the id of the extension to register
    
    extensionClass - the class that implements the
  - remove
```
public static void remove(String extensionName)
```
    Removes an extension from the registry.
    
    Parameters:
    
    extensionName - the name of the extension to remove
  - lookup
```
public static <T extends OcflExtension> Optional<T> lookup(String extensionName)
```
    Returns a registered extension implementation, if one exists.
    
    Type Parameters:
    
    T - the extension class
    
    Parameters:
    
    extensionName - the name of the extension to load
    
    Returns:
    
    the extension