util

Class KeyIntervals

java.lang.Object

util.KeyIntervals

All Implemented Interfaces:

java.io.Serializable

public class KeyIntervals
extends java.lang.Object
implements java.io.Serializable

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Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static int	DESTROY
static int	GET
static int	INVALIDATE
static int	LOCAL_DESTROY
static int	LOCAL_INVALIDATE
static int	NONE
static int	UPDATE_EXISTING_KEY

Constructor Summary

Constructors

Constructor and Description
KeyIntervals(int numKeys) Constructor to create an instance of KeyInterval using the given number of keys and all intervals defined in this class.
KeyIntervals(int[] includeIntervals, int numKeys) Constructor to create an instance of KeyInterval using the given number of keys and the intervals in includeIntervals.

Method Summary

Modifier and Type	Method and Description
int	getFirstKey(int whichInterval) Given an interval, return its first key index.
int	getLastKey(int whichInterval) Given an interval, return its last key index.
int	getNumKeys() Return the total number of keys for all intervals.
int	getNumKeys(int whichInterval) Return the total number of keys for the given interval.
java.lang.String	intervalToString(int whichInterval) Given an interval, return a String describing it
boolean	keyInRange(int whichInterval, long keyIndex) Determine if a key index is in range of an interval.
int	opForKeyIndex(long keyIndex) Return the op for the given keyIndex, or -1 if none
java.lang.String	toString() Return a string describing the intervals in this instance

Methods inherited from class java.lang.Object

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

Field Detail

NONE

public static final int NONE

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Constant Field Values

INVALIDATE

public static final int INVALIDATE

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Constant Field Values

LOCAL_INVALIDATE

public static final int LOCAL_INVALIDATE

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Constant Field Values

DESTROY

public static final int DESTROY

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Constant Field Values

LOCAL_DESTROY

public static final int LOCAL_DESTROY

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Constant Field Values

UPDATE_EXISTING_KEY

public static final int UPDATE_EXISTING_KEY

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Constant Field Values

GET

public static final int GET

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Constant Field Values

Constructor Detail

KeyIntervals

public KeyIntervals(int[] includeIntervals,
                    int numKeys)

Constructor to create an instance of KeyInterval using the given number of keys and the intervals in includeIntervals.

Parameters:

includeIntervals - - the intervals to use when dividing numKeys into intervals

numKeys - - the total number of keys to use to divide among the intervals.

KeyIntervals

public KeyIntervals(int numKeys)

Constructor to create an instance of KeyInterval using the given number of keys and all intervals defined in this class.

Parameters:

numKeys - - the total number of keys to use to divide among the intervals.

Method Detail

getFirstKey

public int getFirstKey(int whichInterval)

Given an interval, return its first key index.

Parameters:

whichInterval - - the interval to get the first key for.

Returns:

The first key index for this interval.

getLastKey

public int getLastKey(int whichInterval)

Given an interval, return its last key index.

Parameters:

whichInterval - - the interval to get the last key for.

Returns:

The last key index for this interval.

getNumKeys

public int getNumKeys()

Return the total number of keys for all intervals.

getNumKeys

public int getNumKeys(int whichInterval)

Return the total number of keys for the given interval.

intervalToString

public java.lang.String intervalToString(int whichInterval)

Given an interval, return a String describing it

toString

public java.lang.String toString()

Return a string describing the intervals in this instance

Overrides:

toString in class java.lang.Object

keyInRange

public boolean keyInRange(int whichInterval,
                          long keyIndex)

Determine if a key index is in range of an interval.

Parameters:

whichInterval - The interval to consider for the range.

keyIndex - The specific key index.

Returns:

True if the keyIndex is in range for the given interval, false otherwise.

opForKeyIndex

public int opForKeyIndex(long keyIndex)

Return the op for the given keyIndex, or -1 if none

Parameters:

keyIndex - Find the op for this keyIndex

Returns:

The op for keyIndex or -1 if none.