com.facebook.presto.common.array

Class ObjectBigArray<T>

java.lang.Object

com.facebook.presto.common.array.ObjectBigArray<T>

public final class ObjectBigArray<T>
extends Object

Constructor Summary

Constructors

Constructor and Description
ObjectBigArray() Creates a new big array containing one initial segment
ObjectBigArray(Object initialValue)

Method Summary

Modifier and Type	Method and Description
void	ensureCapacity(long length) Ensures this big array is at least the specified length.
T	get(long index) Returns the element of this big array at specified index.
T	getAndSet(long index, T replacement) Gets the element of this big array at specified index and then sets the provided replacement value to the same index
long	getCapacity() Returns the current capacity of this big array
void	set(long index, T value) Sets the element of this big array at specified index.
boolean	setIfNull(long index, T value) Sets the element of this big array at specified index if and only if the existing value at that index is null
long	sizeOf() Returns the size of this big array in bytes.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ObjectBigArray

public ObjectBigArray()

Creates a new big array containing one initial segment

ObjectBigArray

public ObjectBigArray(Object initialValue)

Method Detail

sizeOf

public long sizeOf()

Returns the size of this big array in bytes.

getCapacity

public long getCapacity()

Returns the current capacity of this big array

get

public T get(long index)

Returns the element of this big array at specified index.

Parameters:

index - a position in this big array.

Returns:

the element of this big array at the specified position.

getAndSet

public T getAndSet(long index,
                   T replacement)

Gets the element of this big array at specified index and then sets the provided replacement value to the same index

Parameters:

index - a position in this big array.

Returns:

the previously stored value for the specified index

set

public void set(long index,
                T value)

Sets the element of this big array at specified index.

Parameters:

index - a position in this big array.

setIfNull

public boolean setIfNull(long index,
                         T value)

Sets the element of this big array at specified index if and only if the existing value at that index is null

Parameters:

index - a position in this big array.

Returns:

whether the previous value was null and the new value stored

ensureCapacity

public void ensureCapacity(long length)

Ensures this big array is at least the specified length. If the array is smaller, segments are added until the array is larger then the specified length.