org.apache.jackrabbit.oak.plugins.segment

Class RecordIdMap

java.lang.Object

org.apache.jackrabbit.oak.plugins.segment.RecordIdMap

public class RecordIdMap
extends Object

A memory optimised map of short key to RecordId values.

Constructor Summary

Constructors

Constructor and Description
RecordIdMap()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	containsKey(short key) Check whether key is present is this map.
RecordId	get(short key) Returns the value associated with a given key or null if none.
short	getKey(int index) Retrieve the key at a given index.
RecordId	getRecordId(int index) Retrieve the value at a given index.
boolean	put(short key, RecordId value) Associates key with value if not already present
int	size()

Methods inherited from class java.lang.Object

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

Constructor Detail

RecordIdMap

public RecordIdMap()

Method Detail

put

public boolean put(short key,
          @Nonnull
          RecordId value)

Associates key with value if not already present

Parameters:

key -

value -

Returns:

true if added, false if already present

get

@CheckForNull
public RecordId get(short key)

Returns the value associated with a given key or null if none.

Parameters:

key - the key to retrieve

Returns:

the value associated with a given key or null if none.

containsKey

public boolean containsKey(short key)

Check whether key is present is this map.

Parameters:

key - the key to check for

Returns:

true iff key is present.

size

public int size()

Returns:

the number of keys in this map

getKey

public short getKey(int index)

Retrieve the key at a given index. Keys are ordered according the natural ordering of shorts.

Parameters:

index -

Returns:

the key at index

Throws:

ArrayIndexOutOfBoundsException - if not 0 <= index < size()

getRecordId

@Nonnull
public RecordId getRecordId(int index)

Retrieve the value at a given index. Keys are ordered according the natural ordering of shorts.

Parameters:

index -

Returns:

the value at index

Throws:

ArrayIndexOutOfBoundsException - if not 0 <= index < size()