```
public interface KeyIndexableSet<T extends KeyedObject>
```
Interface for sets of graph objects which have keys such as vertices and edges.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`add(T o)`	Adds a KeyedObject to this KeyIndexableSet.
`int`	`capacity()`	Returns the number of KeyedObjects this KeyIndexableSet can hold without growing.
`boolean`	`contains(T o)`	Returns true if this KeyIndexableSet contains the specified KeyedObject.
`T`	`getKeyedObject(long key)`	Returns the KeyedObject with the specified key in this KeyIndexableSet.
`long`	`getModificationNumber()`	The modification number is a counter for the number of changes the KeyIndexableSet has undergone since its creation.
`GraphIterator<T>`	`iterator()`	Returns an iterator for this KeyIndexableSet which uses the hasNext()/next() style.
`boolean`	`remove(T o)`	Remove a KeyedObject from this KeyIndexableSet.
`int`	`size()`	Returns the number of KeyedObjects in this KeyIndexableSet
`T[]`	`toArray()`	Returns the elements of this KeyIndexableSet as an array of KeyedObjects.

- Method Detail
  - getModificationNumber
```
long getModificationNumber()
```
    The modification number is a counter for the number of changes the KeyIndexableSet has undergone since its creation.
  - size
```
int size()
```
    Returns the number of KeyedObjects in this KeyIndexableSet
  - capacity
```
int capacity()
```
    Returns the number of KeyedObjects this KeyIndexableSet can hold without growing.
  - add
```
boolean add(T o)
```
    Adds a KeyedObject to this KeyIndexableSet. The set will increase in capacity if needed.
    
    Returns:
    
    true if the KeyedObject was successfully added. Returns false if the KeyedObject is null or already in the KeyIndexableSet or addition fails for some other reason.
  - remove
```
boolean remove(T o)
```
    Remove a KeyedObject from this KeyIndexableSet.
    
    Returns:
    
    true if the KeyedObject was sucessfully removed. Returns false if the KeyedObject was not in the KeyIndexablrSet.
  - contains
```
boolean contains(T o)
```
    Returns true if this KeyIndexableSet contains the specified KeyedObject.
  - iterator
```
GraphIterator<T> iterator()
```
    Returns an iterator for this KeyIndexableSet which uses the hasNext()/next() style. See GraphIterator.
  - toArray
```
T[] toArray()
```
    Returns the elements of this KeyIndexableSet as an array of KeyedObjects.
  - getKeyedObject
```
T getKeyedObject(long key)
```
    Returns the KeyedObject with the specified key in this KeyIndexableSet. Returns null if the Set contains no object with that key.

Interface KeyIndexableSet<T extends KeyedObject>

Method Summary

Method Detail

getModificationNumber

size

capacity

add

remove

contains

iterator

toArray

getKeyedObject