ExtensionManager (JGraphT : a free Java graph library)

java.lang.Object
- org.jgrapht.alg.util.extension.ExtensionManager<T,B>

Type Parameters:

T - class-type to be extended (class-type of original)

B - class-type of extension
```
public class ExtensionManager<T,B extends Extension>
extends Object
```
Convenience class to manage extensions/encapsulations. This class creates and manages object extensions and encapsulations. An object, from here on denoted as 'original', can be encapsulated in or extended by another object. An example would be the relation between an edge (original) and an annotated edge. The annotated edge encapsulates/extends an edge, thereby augmenting it with additional data. In symbolic form, if b is the original class, then a(b) would be its extension. This concept is similar to java's extension where one class is derived from (extends) another class (original).

Constructor Summary

Constructors
Constructor Description

ExtensionManager(ExtensionFactory<B> factory)
Create a new extension manager.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`B`	`createExtension()`	Creates and returns an extension object.
`B`	`getExtension(T t)`	Creates a new singleton extension object for original t if no such object exists, returns the old one otherwise.

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

- Constructor Detail
  - ExtensionManager
```
public ExtensionManager(ExtensionFactory<B> factory)
```
    Create a new extension manager.
    
    Parameters:
    
    factory - the extension factory to use
- Method Detail
  - createExtension
```
public B createExtension()
```
    Creates and returns an extension object.
    
    Returns:
    
    Extension object
  - getExtension
```
public B getExtension(T t)
```
    Creates a new singleton extension object for original t if no such object exists, returns the old one otherwise.
    
    Parameters:
    
    t - the original object
    
    Returns:
    
    the extension object