Class OffHeapLongIntMapImpl

java.lang.Object

express.mvp.roray.utils.collections.OffHeapLongIntMapImpl

All Implemented Interfaces:

OffHeapLongIntMap, AutoCloseable

public class OffHeapLongIntMapImpl
extends Object
implements OffHeapLongIntMap

A linear-probing, open-addressing hash map with off-heap keys and off-heap int values.

Not thread-safe. Designed for single-threaded hot paths.

Constructor Summary

Constructors

Constructor	Description
OffHeapLongIntMapImpl(int capacity)
OffHeapLongIntMapImpl(int capacity, int missingValue)	Creates a new off-heap long-to-int map with specified capacity and missing value.

Method Summary

Modifier and Type	Method	Description
void	clear()
void	close()	Releases the underlying off-heap memory.
boolean	containsKey(long key)
int	get(long key)	Gets the value for the given key.
boolean	isEmpty()
void	put(long key, int value)
int	remove(long key)	Removes the key and returns its value.
int	size()

Methods inherited from class Object

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

Constructor Details

OffHeapLongIntMapImpl

public OffHeapLongIntMapImpl(int capacity,
 int missingValue)

Creates a new off-heap long-to-int map with specified capacity and missing value.

Parameters:

capacity - the capacity (must be a power of 2)

missingValue - the value returned for missing keys

OffHeapLongIntMapImpl

public OffHeapLongIntMapImpl(int capacity)

Method Details

get

public int get(long key)

Description copied from interface: OffHeapLongIntMap

Gets the value for the given key.

Specified by:

get in interface OffHeapLongIntMap

Parameters:

key - The key.

Returns:

The value, or the configured "missing value" (default -1) if not found.

put

public void put(long key,
 int value)

Specified by:

put in interface OffHeapLongIntMap

remove

public int remove(long key)

Description copied from interface: OffHeapLongIntMap

Removes the key and returns its value.

Specified by:

remove in interface OffHeapLongIntMap

Parameters:

key - The key to remove.

Returns:

The value, or the "missing value" if not found.

clear

public void clear()

Specified by:

clear in interface OffHeapLongIntMap

size

public int size()

Specified by:

size in interface OffHeapLongIntMap

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface OffHeapLongIntMap

containsKey

public boolean containsKey(long key)

Specified by:

containsKey in interface OffHeapLongIntMap

close

public void close()

Description copied from interface: OffHeapLongIntMap

Releases the underlying off-heap memory.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface OffHeapLongIntMap