LongSparseArray (library API)

java.lang.Object
- org.andengine.util.adt.map.LongSparseArray<E>

```
public class LongSparseArray<E>
extends java.lang.Object
```
SparseArrays map longs to Objects. Unlike a normal array of Objects, there can be gaps in the indices. It is intended to be more efficient than using a HashMap to map Longs to Objects.

Constructor Summary

Constructors
Constructor and Description
`LongSparseArray()` Creates a new SparseArray containing no mappings.
`LongSparseArray(int initialCapacity)` Creates a new SparseArray containing no mappings that will not require any additional memory allocation to store the specified number of mappings.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`append(long key, E value)` Puts a key/value pair into the array, optimizing for the case where the key is greater than all existing keys in the array.
`void`	`clear()` Removes all key-value mappings from this SparseArray.
`void`	`delete(long key)` Removes the mapping from the specified key, if there was any.
`E`	`get(long key)` Gets the Object mapped from the specified key, or `null` if no such mapping has been made.
`E`	`get(long key, E valueIfKeyNotFound)` Gets the Object mapped from the specified key, or the specified Object if no such mapping has been made.
`long[]`	`getKeys()`
`int`	`indexOfKey(long key)` Returns the index for which `keyAt(int)` would return the specified key, or a negative number if the specified key is not mapped.
`int`	`indexOfValue(E value)` Returns an index for which `valueAt(int)` would return the specified key, or a negative number if no keys map to the specified value.
`long`	`keyAt(int index)` Given an index in the range `0...size()-1`, returns the key from the `index`th key-value mapping that this SparseArray stores.
`void`	`put(long key, E value)` Adds a mapping from the specified key to the specified value, replacing the previous mapping from the specified key if there was one.
`void`	`remove(long key)` Alias for `delete(long)`.
`void`	`setValueAt(int index, E value)` Given an index in the range `0...size()-1`, sets a new value for the `index`th key-value mapping that this SparseArray stores.
`void`	`setValues(long[] keys, E uniqueValue)` Sets all supplied keys to the given unique value.
`int`	`size()` Returns the number of key-value mappings that this SparseArray currently stores.
`E`	`valueAt(int index)` Given an index in the range `0...size()-1`, returns the value from the `index`th key-value mapping that this SparseArray stores.

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

- Constructor Detail
  - LongSparseArray
```
public LongSparseArray()
```
    Creates a new SparseArray containing no mappings.
  - LongSparseArray
```
public LongSparseArray(int initialCapacity)
```
    Creates a new SparseArray containing no mappings that will not require any additional memory allocation to store the specified number of mappings.
- Method Detail
  - getKeys
```
public long[] getKeys()
```
    Returns:
    
    A copy of all keys contained in the sparse array.
  - setValues
```
public void setValues(long[] keys,
                      E uniqueValue)
```
    Sets all supplied keys to the given unique value.
    
    Parameters:
    
    keys - Keys to set
    
    uniqueValue - Value to set all supplied keys to
  - get
```
public E get(long key)
```
    Gets the Object mapped from the specified key, or null if no such mapping has been made.
  - get
```
public E get(long key,
             E valueIfKeyNotFound)
```
    Gets the Object mapped from the specified key, or the specified Object if no such mapping has been made.
  - delete
```
public void delete(long key)
```
    Removes the mapping from the specified key, if there was any.
  - remove
```
public void remove(long key)
```
    Alias for delete(long).
  - put
```
public void put(long key,
                E value)
```
    Adds a mapping from the specified key to the specified value, replacing the previous mapping from the specified key if there was one.
  - size
```
public int size()
```
    Returns the number of key-value mappings that this SparseArray currently stores.
  - keyAt
```
public long keyAt(int index)
```
    Given an index in the range 0...size()-1, returns the key from the indexth key-value mapping that this SparseArray stores.
  - valueAt
```
public E valueAt(int index)
```
    Given an index in the range 0...size()-1, returns the value from the indexth key-value mapping that this SparseArray stores.
  - setValueAt
```
public void setValueAt(int index,
                       E value)
```
    Given an index in the range 0...size()-1, sets a new value for the indexth key-value mapping that this SparseArray stores.
  - indexOfKey
```
public int indexOfKey(long key)
```
    Returns the index for which keyAt(int) would return the specified key, or a negative number if the specified key is not mapped.
  - indexOfValue
```
public int indexOfValue(E value)
```
    Returns an index for which valueAt(int) would return the specified key, or a negative number if no keys map to the specified value. Beware that this is a linear search, unlike lookups by key, and that multiple keys can map to the same value and this will find only one of them.
  - clear
```
public void clear()
```
    Removes all key-value mappings from this SparseArray.
  - append
```
public void append(long key,
                   E value)
```
    Puts a key/value pair into the array, optimizing for the case where the key is greater than all existing keys in the array.

Class LongSparseArray<E>

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

LongSparseArray

LongSparseArray

Method Detail

getKeys

setValues

get

get

delete

remove

put

size

keyAt

valueAt

setValueAt

indexOfKey

indexOfValue

clear

append