ObjectDoubleHashMap.KeysContainer (HPPC v0.7.1 API Documentation)

java.lang.Object
- com.carrotsearch.hppc.ObjectDoubleHashMap.KeysContainer

All Implemented Interfaces:

ObjectCollection<KType>, ObjectContainer<KType>, ObjectLookupContainer<KType>, java.lang.Iterable<ObjectCursor<KType>>

Enclosing class:

ObjectDoubleHashMap<KType>
```
public final class ObjectDoubleHashMap.KeysContainer
extends java.lang.Object
implements ObjectLookupContainer<KType>
```
A view of the keys inside this hash map.

Constructor Summary

Constructors
Constructor and Description

KeysContainer()

Constructors
Constructor and Description
`KeysContainer()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`clear()` Removes all elements from this collection.
`boolean`	`contains(KType e)` Lookup a given element in the container.
`protected boolean`	`equals(java.lang.Object v1, java.lang.Object v2)`
`<T extends ObjectPredicate<? super KType>> T`	`forEach(T predicate)` Applies a `predicate` to container elements as long, as the predicate returns `true`.
`<T extends ObjectProcedure<? super KType>> T`	`forEach(T procedure)` Applies a `procedure` to all container elements.
`boolean`	`isEmpty()` Shortcut for `size() == 0`.
`java.util.Iterator<ObjectCursor<KType>>`	`iterator()` Returns an iterator to a cursor traversing the collection.
`void`	`release()` Removes all elements from the collection and additionally releases any internal buffers.
`int`	`removeAll(KType e)` Removes all occurrences of `e` from this collection.
`int`	`removeAll(ObjectLookupContainer<? super KType> c)` Default implementation uses a predicate for removal.
`int`	`removeAll(ObjectPredicate<? super KType> predicate)` Removes all elements in this collection for which the given predicate returns `true`.
`int`	`retainAll(ObjectLookupContainer<? super KType> c)` Default implementation uses a predicate for retaining.
`int`	`retainAll(ObjectPredicate<? super KType> predicate)` Default implementation redirects to `ObjectCollection.removeAll(ObjectPredicate)` and negates the predicate.
`int`	`size()` Return the current number of elements in this container.
`java.lang.Object[]`	`toArray()` Default implementation of copying to an array.
`<T> T[]`	`toArray(java.lang.Class<T> componentClass)` Copies all elements of this container to a dynamically created array of the given component type.
`java.lang.String`	`toString()` Convert the contents of this container to a human-friendly string.

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

Methods inherited from interface com.carrotsearch.hppc.ObjectContainer
toArray, toArray

Methods inherited from interface java.lang.Iterable
forEach, spliterator

- Constructor Detail
  - KeysContainer
```
public KeysContainer()
```
- Method Detail
  - contains
```
public boolean contains(KType e)
```
    Description copied from interface: ObjectContainer
    
    Lookup a given element in the container. This operation has no speed guarantees (may be linear with respect to the size of this container).
    
    Specified by:
    
    contains in interface ObjectContainer<KType>
    
    Specified by:
    
    contains in interface ObjectLookupContainer<KType>
    
    Returns:
    
    Returns true if this container has an element equal to e.
  - forEach
```
public <T extends ObjectProcedure<? super KType>> T forEach(T procedure)
```
    Description copied from interface: ObjectContainer
    Applies a procedure to all container elements. Returns the argument (any subclass of ObjectProcedure. This lets the caller to call methods of the argument by chaining the call (even if the argument is an anonymous type) to retrieve computed values, for example (IntContainer):
```
 int count = container.forEach(new IntProcedure() {
   int count; // this is a field declaration in an anonymous class.
 
   public void apply(int value) {
     count++;
   }
 }).count;
 
```
    Specified by:
    
    forEach in interface ObjectContainer<KType>
  - forEach
```
public <T extends ObjectPredicate<? super KType>> T forEach(T predicate)
```
    Description copied from interface: ObjectContainer
    
    Applies a predicate to container elements as long, as the predicate returns true. The iteration is interrupted otherwise.
    
    Specified by:
    
    forEach in interface ObjectContainer<KType>
  - isEmpty
```
public boolean isEmpty()
```
    Description copied from interface: ObjectContainer
    
    Shortcut for size() == 0.
    
    Specified by:
    
    isEmpty in interface ObjectContainer<KType>
  - iterator
```
public java.util.Iterator<ObjectCursor<KType>> iterator()
```
    Description copied from interface: ObjectContainer
    Returns an iterator to a cursor traversing the collection. The order of traversal is not defined. More than one cursor may be active at a time. The behavior of iterators is undefined if structural changes are made to the underlying collection.
    The iterator is implemented as a cursor and it returns the same cursor instance on every call to Iterator.next() (to avoid boxing of primitive types). To read the current list's value (or index in the list) use the cursor's public fields. An example is shown below.
```
 for (ObjectCursor<Object> c : container) {
   System.out.println("index=" + c.index + " value=" + c.value);
 }
 
```
    Specified by:
    
    iterator in interface ObjectContainer<KType>
    
    Specified by:
    
    iterator in interface java.lang.Iterable<ObjectCursor<KType>>
  - size
```
public int size()
```
    Description copied from interface: ObjectContainer
    
    Return the current number of elements in this container. The time for calculating the container's size may take O(n) time, although implementing classes should try to maintain the current size and return in constant time.
    
    Specified by:
    
    size in interface ObjectContainer<KType>
  - clear
```
public void clear()
```
    Description copied from interface: ObjectCollection
    
    Removes all elements from this collection.
    
    Specified by:
    
    clear in interface ObjectCollection<KType>
    
    See Also:
    
    ObjectCollection.release()
  - release
```
public void release()
```
    Description copied from interface: ObjectCollection
    
    Removes all elements from the collection and additionally releases any internal buffers. Typically, if the object is to be reused, a simple ObjectCollection.clear() should be a better alternative since it'll avoid reallocation.
    
    Specified by:
    
    release in interface ObjectCollection<KType>
    
    See Also:
    
    ObjectCollection.clear()
  - removeAll
```
public int removeAll(ObjectPredicate<? super KType> predicate)
```
    Description copied from interface: ObjectCollection
    
    Removes all elements in this collection for which the given predicate returns true.
    
    Specified by:
    
    removeAll in interface ObjectCollection<KType>
    
    Returns:
    
    Returns the number of removed elements.
  - removeAll
```
public int removeAll(KType e)
```
    Description copied from interface: ObjectCollection
    
    Removes all occurrences of e from this collection.
    
    Specified by:
    
    removeAll in interface ObjectCollection<KType>
    
    Parameters:
    
    e - Element to be removed from this collection, if present.
    
    Returns:
    
    The number of removed elements as a result of this call.
  - removeAll
```
public int removeAll(ObjectLookupContainer<? super KType> c)
```
    Default implementation uses a predicate for removal.
    
    Specified by:
    
    removeAll in interface ObjectCollection<KType>
    
    Returns:
    
    Returns the number of removed elements.
  - retainAll
```
public int retainAll(ObjectLookupContainer<? super KType> c)
```
    Default implementation uses a predicate for retaining.
    
    Specified by:
    
    retainAll in interface ObjectCollection<KType>
    
    Returns:
    
    Returns the number of removed elements.
  - retainAll
```
public int retainAll(ObjectPredicate<? super KType> predicate)
```
    Default implementation redirects to ObjectCollection.removeAll(ObjectPredicate) and negates the predicate.
    
    Specified by:
    
    retainAll in interface ObjectCollection<KType>
    
    Returns:
    
    Returns the number of removed elements.
  - toArray
```
public java.lang.Object[] toArray()
```
    Default implementation of copying to an array.
    
    Specified by:
    
    toArray in interface ObjectContainer<KType>
  - toArray
```
public <T> T[] toArray(java.lang.Class<T> componentClass)
```
    Description copied from interface: ObjectContainer
    
    Copies all elements of this container to a dynamically created array of the given component type.
    
    Specified by:
    
    toArray in interface ObjectContainer<KType>
  - toString
```
public java.lang.String toString()
```
    Convert the contents of this container to a human-friendly string.
    
    Overrides:
    
    toString in class java.lang.Object
  - equals
```
protected boolean equals(java.lang.Object v1,
                         java.lang.Object v2)
```

Class ObjectDoubleHashMap.KeysContainer

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Methods inherited from interface com.carrotsearch.hppc.ObjectContainer

Methods inherited from interface java.lang.Iterable

Constructor Detail

KeysContainer

Method Detail

contains

forEach

forEach

isEmpty

iterator

size

clear

release

removeAll

removeAll

removeAll

retainAll

retainAll

toArray

toArray

toString

equals