KeyedCollection

java.lang.Object
- java.util.AbstractCollection<V>
- - org.apache.openejb.jee.KeyedCollection<K,V>

All Implemented Interfaces:

java.lang.Iterable<V>, java.util.Collection<V>

Direct Known Subclasses:

LocalCollection
```
public class KeyedCollection<K,V>
extends java.util.AbstractCollection<V>
```
A KeyedCollection is a light weight wrapper around a Map (LinkedHashMap) values set. When a value is added using the add method of this class a key is obtained for the value using either the provided KeyExtractor, or if no KeyExtractor was provided, the value is cast to Keyable and the getKey() method is called.
The underlying Map can be obtainded with the toMap method. Any changes to this map are directly reflected in this collection. Additions to the map do not need to implement Keyable, nor do the values need to be keyed using the key returned from the KeyExtractor.getKey(value) or the key returned from the Keyable.getKey() Method.

Constructor Summary

Constructors
Constructor and Description
`KeyedCollection()`
`KeyedCollection(java.util.Collection<? extends V> c)`
`KeyedCollection(int initialCapacity)`
`KeyedCollection(KeyExtractor<? extends K,? super V> keyExtractor)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`add(V value)`
`void`	`clear()`
`protected K`	`getKey(V value)`
`boolean`	`isEmpty()`
`java.util.Iterator<V>`	`iterator()`
`int`	`size()`
`java.util.Map<K,V>`	`toMap()` Get the underlying map used by this collection.
`java.lang.String`	`toString()`

Methods inherited from class java.util.AbstractCollection
addAll, contains, containsAll, remove, removeAll, retainAll, toArray, toArray

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

Methods inherited from interface java.util.Collection
equals, hashCode, parallelStream, removeIf, spliterator, stream

Methods inherited from interface java.lang.Iterable
forEach

- Constructor Detail
  - KeyedCollection
```
public KeyedCollection()
```
  - KeyedCollection
```
public KeyedCollection(KeyExtractor<? extends K,? super V> keyExtractor)
```
  - KeyedCollection
```
public KeyedCollection(java.util.Collection<? extends V> c)
```
  - KeyedCollection
```
public KeyedCollection(int initialCapacity)
```
- Method Detail
  - toMap
```
public java.util.Map<K,V> toMap()
```
    Get the underlying map used by this collection.
    Any changes to this map are directly reflected in this collection. Additions to the map do not need to implement Keyable, nor do the values need to be keyed using the key returned from the KeyExtractor.getKey(value) or the key returned from the Keyable.getKey() Method.
    
    Returns:
    
    the indexed contents of this collection
  - add
```
public boolean add(V value)
```
    Specified by:
    
    add in interface java.util.Collection<V>
    
    Overrides:
    
    add in class java.util.AbstractCollection<V>
  - iterator
```
public java.util.Iterator<V> iterator()
```
    Specified by:
    
    iterator in interface java.lang.Iterable<V>
    
    Specified by:
    
    iterator in interface java.util.Collection<V>
    
    Specified by:
    
    iterator in class java.util.AbstractCollection<V>
  - size
```
public int size()
```
    Specified by:
    
    size in interface java.util.Collection<V>
    
    Specified by:
    
    size in class java.util.AbstractCollection<V>
  - isEmpty
```
public boolean isEmpty()
```
    Specified by:
    
    isEmpty in interface java.util.Collection<V>
    
    Overrides:
    
    isEmpty in class java.util.AbstractCollection<V>
  - clear
```
public void clear()
```
    Specified by:
    
    clear in interface java.util.Collection<V>
    
    Overrides:
    
    clear in class java.util.AbstractCollection<V>
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.util.AbstractCollection<V>
  - getKey
```
protected K getKey(V value)
```

Class KeyedCollection<K,V>

Constructor Summary

Method Summary

Methods inherited from class java.util.AbstractCollection

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Constructor Detail

KeyedCollection

KeyedCollection

KeyedCollection

KeyedCollection

Method Detail

toMap

add

iterator

size

isEmpty

clear

toString

getKey