Key1Collection (Brownies-Collections 0.9.15 API)

java.lang.Object
- org.magicwerk.brownies.collections.KeyCollectionImpl<E>
- - org.magicwerk.brownies.collections.Key1Collection<E,K>

Type Parameters:

E - type of elements stored in the collection

K - type of key

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Iterable<E>, java.util.Collection<E>

Direct Known Subclasses:

Key1Set
```
public class Key1Collection<E,K>
extends KeyCollectionImpl<E>
```
Key1Collection implements a collection with 1 key. This key can be accessed fast. It can provide fast access to its elements like a Set. The elements allowed in the collection can be constraint (null/duplicate values).

See Also:

Key1List, Serialized Form

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class Key1Collection.Builder<E,K>
Builder to construct Key1Collection instances.
- Nested classes/interfaces inherited from class org.magicwerk.brownies.collections.KeyCollectionImpl
  KeyCollectionImpl.BuilderImpl<E>

Nested Classes
Modifier and Type	Class and Description
`static class`	`Key1Collection.Builder<E,K>` Builder to construct Key1Collection instances.

Constructor Summary

Constructors
Modifier Constructor and Description

protected Key1Collection()
Protected constructor used by builder or derived collections.

Constructors
Modifier	Constructor and Description
`protected`	`Key1Collection()` Protected constructor used by builder or derived collections.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.util.Map<K,E>`	`asMap1()` Returns a map view to the key map.
`boolean`	`containsKey1(K key)` Checks whether an element with specified key exists.
`Key1Collection<E,K>`	`copy()` Returns a copy of this collection with all its elements.
`Key1Collection<E,K>`	`crop()` Returns a copy of this collection but without elements.
`Key1Collection<E,K>`	`getAll(E elem)` Returns all equal elements.
`Key1Collection<E,K>`	`getAllByKey1(K key)` Returns all elements with specified key.
`IList<K>`	`getAllKeys1()` Returns list containing all keys in element order.
`protected Key1Collection.Builder<E,K>`	`getBuilder()`
`E`	`getByKey1(K key)` Returns element with specified key.
`int`	`getCount(E elem)` Returns the number of equal elements.
`int`	`getCountByKey1(K key)` Returns the number of elements with specified key.
`java.util.Set<E>`	`getDistinct()` Returns all distinct elements in the same order as in the collection.
`java.util.Set<K>`	`getDistinctKeys1()` Returns all distinct keys in the same order as in the key map.
`java.util.function.Function<E,K>`	`getKey1Mapper()` Returns mapper for key map.
`void`	`invalidate(E elem)` Invalidate element, i.e. all keys of the element are extracted again and stored in the key maps.
`void`	`invalidateKey1(K oldKey, K newKey, E elem)` Invalidate key value of element.
`E`	`put(E elem)` Adds or replaces element.
`E`	`putByKey1(E elem)` Adds or replaces element by key.
`Key1Collection<E,K>`	`removeAll(E elem)` Removes all equal elements.
`Key1Collection<E,K>`	`removeAllByKey1(K key)` Removes all elements with specified key.
`E`	`removeByKey1(K key)` Removes element with specified key.

Methods inherited from class org.magicwerk.brownies.collections.KeyCollectionImpl
add, addAll, asSet, clear, clone, contains, containsAll, containsKey, doRemoveByKey, equals, getAllByKey, getAllByKey, getAllKeys, getByKey, getCountByKey, getDistinctKeys, getKeyMapper, hashCode, initClone, invalidateKey, isEmpty, isSorted, iterator, putByKey, remove, removeAll, removeAllByKey, removeAllByKey, removeByKey, retainAll, size, toArray, toArray, toList, toString

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

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

Methods inherited from interface java.lang.Iterable
forEach

- Constructor Detail
  - Key1Collection
```
protected Key1Collection()
```
    Protected constructor used by builder or derived collections.
- Method Detail
  - getBuilder
```
protected Key1Collection.Builder<E,K> getBuilder()
```
    Returns:
    
    builder to use in extending classes
  - copy
```
public Key1Collection<E,K> copy()
```
    Description copied from class: KeyCollectionImpl
    
    Returns a copy of this collection with all its elements. The new collection will use the same comparator, ordering, etc.
    
    Overrides:
    
    copy in class KeyCollectionImpl<E>
    
    Returns:
    
    a copy of this collection
  - crop
```
public Key1Collection<E,K> crop()
```
    Description copied from class: KeyCollectionImpl
    
    Returns a copy of this collection but without elements. The new collection will use the same comparator, ordering, etc.
    
    Overrides:
    
    crop in class KeyCollectionImpl<E>
    
    Returns:
    
    an empty copy of this collection
  - getAll
```
public Key1Collection<E,K> getAll(E elem)
```
    Description copied from class: KeyCollectionImpl
    
    Returns all equal elements.
    
    Overrides:
    
    getAll in class KeyCollectionImpl<E>
    
    Parameters:
    
    elem - element
    
    Returns:
    
    all equal elements (never null)
  - getCount
```
public int getCount(E elem)
```
    Description copied from class: KeyCollectionImpl
    
    Returns the number of equal elements.
    
    Overrides:
    
    getCount in class KeyCollectionImpl<E>
    
    Parameters:
    
    elem - element
    
    Returns:
    
    number of equal elements
  - removeAll
```
public Key1Collection<E,K> removeAll(E elem)
```
    Description copied from class: KeyCollectionImpl
    
    Removes all equal elements.
    
    Overrides:
    
    removeAll in class KeyCollectionImpl<E>
    
    Parameters:
    
    elem - element
    
    Returns:
    
    removed equal elements (never null)
  - getDistinct
```
public java.util.Set<E> getDistinct()
```
    Description copied from class: KeyCollectionImpl
    
    Returns all distinct elements in the same order as in the collection.
    
    Overrides:
    
    getDistinct in class KeyCollectionImpl<E>
    
    Returns:
    
    distinct elements
  - put
```
public E put(E elem)
```
    Description copied from class: KeyCollectionImpl
    Adds or replaces element. If there is no such element, the element is added. If there is such an element, the element is replaced. So said simply, it is a shortcut for the following code:
```
 if (contains(elem)) {
   remove(elem);
 }
 add(elem);
 
```
    However the method is atomic in the sense that all or none operations are executed. So if there is already such an element, but adding the new one fails due to a constraint violation, the old element remains in the list.
    Overrides:
    
    put in class KeyCollectionImpl<E>
    
    Parameters:
    
    elem - element
    
    Returns:
    
    element which has been replaced or null otherwise
  - invalidate
```
public void invalidate(E elem)
```
    Description copied from class: KeyCollectionImpl
    
    Invalidate element, i.e. all keys of the element are extracted again and stored in the key maps. Old key values are removed if needed. You must call an invalidate method if an element's key value has changed after adding it to the collection.
    
    Overrides:
    
    invalidate in class KeyCollectionImpl<E>
    
    Parameters:
    
    elem - element to invalidate
  - getKey1Mapper
```
public java.util.function.Function<E,K> getKey1Mapper()
```
    Returns mapper for key map.
    
    Returns:
    
    mapper for key map
  - asMap1
```
public java.util.Map<K,E> asMap1()
```
    Returns a map view to the key map. The collection can be modified through the map as long as the constraint are not violated. The collections returned by the methods entrySet(), keySet(), and values() are immutable however.
    
    Returns:
    
    map view to key map
    
    Throws:
    
    java.lang.IllegalArgumentException - if the key map cannot be viewed as Map
  - containsKey1
```
public boolean containsKey1(K key)
```
    Checks whether an element with specified key exists.
    
    Parameters:
    
    key - key
    
    Returns:
    
    true if element with specified key exists, otherwise false
  - getByKey1
```
public E getByKey1(K key)
```
    Returns element with specified key. If there are several elements with the same key, the one added first will be returned.
    
    Parameters:
    
    key - key
    
    Returns:
    
    element with specified key or null
  - getAllByKey1
```
public Key1Collection<E,K> getAllByKey1(K key)
```
    Returns all elements with specified key.
    
    Parameters:
    
    key - key
    
    Returns:
    
    all elements with specified key (never null)
  - getCountByKey1
```
public int getCountByKey1(K key)
```
    Returns the number of elements with specified key.
    
    Parameters:
    
    key - key
    
    Returns:
    
    number of elements with specified key
  - removeByKey1
```
public E removeByKey1(K key)
```
    Removes element with specified key. If there are several elements with the same key, the one added first will be removed.
    
    Parameters:
    
    key - key
    
    Returns:
    
    element with specified key or null
  - removeAllByKey1
```
public Key1Collection<E,K> removeAllByKey1(K key)
```
    Removes all elements with specified key.
    
    Parameters:
    
    key - key
    
    Returns:
    
    removed elements with specified key (never null)
  - getAllKeys1
```
public IList<K> getAllKeys1()
```
    Returns list containing all keys in element order.
    
    Returns:
    
    list containing all keys
  - getDistinctKeys1
```
public java.util.Set<K> getDistinctKeys1()
```
    Returns all distinct keys in the same order as in the key map.
    
    Returns:
    
    distinct keys
  - putByKey1
```
public E putByKey1(E elem)
```
    Adds or replaces element by key. If there is no such element, the element is added. If there is such an element, the element is replaced. So said simply, it is a shortcut for the following code:
```
 if (containsKey1(elem)) {
   removeByKey1(elem);
 }
 add(elem);
 
```
    However the method is atomic in the sense that all or none operations are executed. So if there is already such an element, but adding the new one fails due to a constraint violation, the old element remains in the list.
    Parameters:
    
    elem - element
    
    Returns:
    
    element which has been replaced or null otherwise
  - invalidateKey1
```
public void invalidateKey1(K oldKey,
                           K newKey,
                           E elem)
```
    Invalidate key value of element. You must call an invalidate method if an element's key value has changed after adding it to the collection.
    
    Parameters:
    
    oldKey - old key value
    
    newKey - new key value
    
    elem - element to invalidate (can be null if there are no duplicates with this key)

Class Key1Collection<E,K>

Nested Class Summary

Nested classes/interfaces inherited from class org.magicwerk.brownies.collections.KeyCollectionImpl

Constructor Summary

Method Summary

Methods inherited from class org.magicwerk.brownies.collections.KeyCollectionImpl

Methods inherited from class java.lang.Object

Methods inherited from interface java.util.Collection

Methods inherited from interface java.lang.Iterable

Constructor Detail

Key1Collection

Method Detail

getBuilder

copy

crop

getAll

getCount

removeAll

getDistinct

put

invalidate

getKey1Mapper

asMap1

containsKey1

getByKey1

getAllByKey1

getCountByKey1

removeByKey1

removeAllByKey1

getAllKeys1

getDistinctKeys1

putByKey1

invalidateKey1