rice.p2p.multiring
Class RingId

java.lang.Object
  rice.p2p.multiring.RingId

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable, Id

public class RingId

extends java.lang.Object

implements Id

Version:

$Id: RingId.java 2302 2005-03-11 00:58:26Z jeffh $

Author:

Alan Mislove

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface rice.p2p.commonapi.Id

Id.Distance

Field Summary

protected Id	id The id which this ringId represents
protected Id	ringId The ringId which this ringId represents

Method Summary

Id	addToId(Id.Distance offset) Returns an Id corresponding to this Id plus a given distance
static RingId	build(Id ringId, Id id) Constructor.
static RingId	build(java.lang.String s) Method which splits apart a ringid string and returns the RingID
boolean	clockwise(Id nid) Checks to see if the Id nid is clockwise or counterclockwise from this, on the ring.
int	compareTo(java.lang.Object o) Returns this id compared to the target
Id.Distance	distanceFromId(Id nid) Returns the shorter numerical distance on the ring between a pair of Ids.
boolean	equals(java.lang.Object o) Returns whether or not this object is equal to the provided one
int	getByteArrayLength() Returns the length of the byte[] representing this Id
Id	getId() Returns this ringid's id
Id	getRingId() Returns this ringid's ring id
int	hashCode() Returns the hashCode
boolean	isBetween(Id ccw, Id cw) Checks if this Id is between two given ids ccw (inclusive) and cw (exclusive) on the circle
Id.Distance	longDistanceFromId(Id nid) Returns the longer numerical distance on the ring between a pair of Ids.
byte[]	toByteArray() Returns a (mutable) byte array representing this Id
void	toByteArray(byte[] array, int offset) Stores the byte[] value of this Id in the provided byte array
java.lang.String	toString() Returns a string representing this ring Id.
java.lang.String	toStringFull() Returns a string representing the full length of this Id.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

id

protected Id id

The id which this ringId represents

ringId

protected Id ringId

The ringId which this ringId represents

Method Detail

build

public static RingId build(Id ringId,
                           Id id)

Constructor.

Parameters:

material - an array of length at least IdBitLength/32 containing raw Id material.

build

public static RingId build(java.lang.String s)

Method which splits apart a ringid string and returns the RingID

Parameters:

s - The ring to parse

Returns:

The result

getId

public Id getId()

Returns this ringid's id

Returns:

The id of this ringid

getRingId

public Id getRingId()

Returns this ringid's ring id

Returns:

The ring id of this ringid

isBetween

public boolean isBetween(Id ccw,
                         Id cw)

Checks if this Id is between two given ids ccw (inclusive) and cw (exclusive) on the circle

Specified by:

isBetween in interface Id

Parameters:

ccw - the counterclockwise id

cw - the clockwise id

Returns:

true if this is between ccw (inclusive) and cw (exclusive), false otherwise

clockwise

public boolean clockwise(Id nid)

Checks to see if the Id nid is clockwise or counterclockwise from this, on the ring. An Id is clockwise if it is within the half circle clockwise from this on the ring. An Id is considered counter-clockwise from itself.

Specified by:

clockwise in interface Id

Parameters:

nid - The id to compare to

Returns:

true if clockwise, false otherwise.

addToId

public Id addToId(Id.Distance offset)

Returns an Id corresponding to this Id plus a given distance

Specified by:

addToId in interface Id

Parameters:

offset - the distance to add

Returns:

the new Id

distanceFromId

public Id.Distance distanceFromId(Id nid)

Returns the shorter numerical distance on the ring between a pair of Ids.

Specified by:

distanceFromId in interface Id

Parameters:

nid - the other node id.

Returns:

the distance between this and nid.

longDistanceFromId

public Id.Distance longDistanceFromId(Id nid)

Returns the longer numerical distance on the ring between a pair of Ids.

Specified by:

longDistanceFromId in interface Id

Parameters:

nid - the other node id.

Returns:

the distance between this and nid.

toByteArray

public byte[] toByteArray()

Returns a (mutable) byte array representing this Id

Specified by:

toByteArray in interface Id

Returns:

A byte[] representing this Id

toByteArray

public void toByteArray(byte[] array,
                        int offset)

Stores the byte[] value of this Id in the provided byte array

Specified by:

toByteArray in interface Id

getByteArrayLength

public int getByteArrayLength()

Returns the length of the byte[] representing this Id

Specified by:

getByteArrayLength in interface Id

Returns:

The length of the byte[] representing this Id

equals

public boolean equals(java.lang.Object o)

Returns whether or not this object is equal to the provided one

Overrides:

equals in class java.lang.Object

Parameters:

o - The object to compare to

Returns:

Whether or not this is object is equal

hashCode

public int hashCode()

Returns the hashCode

Overrides:

hashCode in class java.lang.Object

Returns:

hashCode

toString

public java.lang.String toString()

Returns a string representing this ring Id.

Overrides:

toString in class java.lang.Object

Returns:

A string with all of this Id

toStringFull

public java.lang.String toStringFull()

Returns a string representing the full length of this Id.

Specified by:

toStringFull in interface Id

Returns:

A string with all of this Id

compareTo

public int compareTo(java.lang.Object o)

Returns this id compared to the target

Specified by:

compareTo in interface java.lang.Comparable

Returns:

The comparison