IntHashSet (Lucene 4.0.0 API)

java.lang.Object
- org.apache.lucene.util.collections.IntHashSet

```
public class IntHashSet
extends Object
```
A Set or primitive int. Implemented as a HashMap of int->int. *

WARNING: This API is experimental and might change in incompatible ways in the next release.

Constructor Summary

Constructors
Constructor and Description

IntHashSet()
Constructs a map with default capacity.

IntHashSet(int capacity)
Constructs a map with given capacity.

Constructors
Constructor and Description
`IntHashSet()` Constructs a map with default capacity.
`IntHashSet(int capacity)` Constructs a map with given capacity.

Method Summary

Methods
Modifier and Type	Method and Description
`boolean`	`add(int value)` Add a mapping int key -> int value.
`protected int`	`calcBaseHashIndex(int key)` Calculating the baseHash index using the internal `hashFactor` .
`void`	`clear()` Empties the map.
`boolean`	`contains(int value)` Checks if a given key exists in the map.
`protected int`	`find(int key)` Find the actual index of a given key.
`protected void`	`grow()` Grows the map.
`boolean`	`isEmpty()`
`IntIterator`	`iterator()` Returns a new iterator for the mapped objects.
`boolean`	`remove(int value)` Remove a pair from the map, specified by it's key.
`int`	`size()`
`int[]`	`toArray()` Translates the mapped pairs' values into an array of Objects
`int[]`	`toArray(int[] a)` Translates the mapped pairs' values into an array of ints
`String`	`toHashString()`
`String`	`toString()` I have no idea why would anyone call it - but for debug purposes. Prints the entire map, including the index, key, object, next and prev.

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

- Constructor Detail
  - IntHashSet
```
public IntHashSet()
```
    Constructs a map with default capacity.
  - IntHashSet
```
public IntHashSet(int capacity)
```
    Constructs a map with given capacity. Capacity is adjusted to a native power of 2, with minimum of 16.
    
    Parameters:
    capacity - minimum capacity for the map.
- Method Detail
  - calcBaseHashIndex
```
protected int calcBaseHashIndex(int key)
```
    Calculating the baseHash index using the internal hashFactor .
  - clear
```
public void clear()
```
    Empties the map. Generates the "Empty" space list for later allocation.
  - contains
```
public boolean contains(int value)
```
    Checks if a given key exists in the map.
    
    Parameters:
    value - that is checked against the map data.
    
    Returns:
    true if the key exists in the map. false otherwise.
  - find
```
protected int find(int key)
```
    Find the actual index of a given key.
    
    Returns:
    index of the key. zero if the key wasn't found.
  - grow
```
protected void grow()
```
    Grows the map. Allocates a new map of double the capacity, and fast-insert the old key-value pairs.
  - isEmpty
```
public boolean isEmpty()
```
    Returns:
    true if the map is empty. false otherwise.
  - iterator
```
public IntIterator iterator()
```
    Returns a new iterator for the mapped objects.
  - add
```
public boolean add(int value)
```
    Add a mapping int key -> int value.
    If the key was already inside just updating the value it refers to as the given object.
    Otherwise if the map is full, first grow() the map.
    
    Parameters:
    value - integer which maps the given value
    
    Returns:
    true always.
  - remove
```
public boolean remove(int value)
```
    Remove a pair from the map, specified by it's key.
    
    Parameters:
    value - specify the value to be removed
    
    Returns:
    true if the map was changed (the key was found and removed). false otherwise.
  - size
```
public int size()
```
    Returns:
    number of pairs currently in the map
  - toArray
```
public int[] toArray()
```
    Translates the mapped pairs' values into an array of Objects
    
    Returns:
    an object array of all the values currently in the map.
  - toArray
```
public int[] toArray(int[] a)
```
    Translates the mapped pairs' values into an array of ints
    
    Parameters:
    a - the array into which the elements of the map are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.
    
    Returns:
    an array containing the values stored in the map
  - toString
```
public String toString()
```
    I have no idea why would anyone call it - but for debug purposes.
    Prints the entire map, including the index, key, object, next and prev.
    
    Overrides:
    
    toString in class Object
  - toHashString
```
public String toHashString()
```

Class IntHashSet

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

IntHashSet

IntHashSet

Method Detail

calcBaseHashIndex

clear

contains

find

grow

isEmpty

iterator

add

remove

size

toArray

toArray

toString

toHashString