com.thinkaurelius.titan.graphdb.database.idhandling

Class IDHandler

java.lang.Object

com.thinkaurelius.titan.graphdb.database.idhandling.IDHandler

public class IDHandler
extends Object

Author:

Matthias Broecheler (me@matthiasb.com)

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	IDHandler.DirectionID
static class	IDHandler.EdgeTypeParse

Field Summary

Fields

Modifier and Type	Field and Description
static StaticBuffer	MAX_KEY
static StaticBuffer	MIN_KEY

Constructor Summary

Constructors

Constructor and Description
IDHandler()

Method Summary

Methods

Modifier and Type	Method and Description
static int	edgeTypeLength(long etid)
static StaticBuffer[]	getBounds(RelationCategory type, boolean systemTypes)
static StaticBuffer	getEdgeType(long etid, IDHandler.DirectionID dirID, boolean hidden)
static IDHandler.EdgeTypeParse	readEdgeType(ReadBuffer in)
static long	readInlineEdgeType(ReadBuffer in)
static void	writeEdgeType(WriteBuffer out, long etid, IDHandler.DirectionID dirID, boolean hidden) The edge type is written as follows: [ Hidden & System (2 bit) | Relation-Type-ID (1 bit) | Relation-Type-Count (variable) | Direction-ID (1 bit)] Would only need 1 bit to store relation-type-id, but using two so we can upper bound.
static void	writeInlineEdgeType(WriteBuffer out, long etid)

Methods inherited from class java.lang.Object

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

Field Detail

MIN_KEY

public static final StaticBuffer MIN_KEY

MAX_KEY

public static final StaticBuffer MAX_KEY

Constructor Detail

IDHandler

public IDHandler()

Method Detail

edgeTypeLength

public static int edgeTypeLength(long etid)

writeEdgeType

public static void writeEdgeType(WriteBuffer out,
                 long etid,
                 IDHandler.DirectionID dirID,
                 boolean hidden)

The edge type is written as follows: [ Hidden & System (2 bit) | Relation-Type-ID (1 bit) | Relation-Type-Count (variable) | Direction-ID (1 bit)] Would only need 1 bit to store relation-type-id, but using two so we can upper bound.

Parameters:

out -

etid -

dirID -

getEdgeType

public static StaticBuffer getEdgeType(long etid,
                       IDHandler.DirectionID dirID,
                       boolean hidden)

readEdgeType

public static IDHandler.EdgeTypeParse readEdgeType(ReadBuffer in)

writeInlineEdgeType

public static void writeInlineEdgeType(WriteBuffer out,
                       long etid)

readInlineEdgeType

public static long readInlineEdgeType(ReadBuffer in)

getBounds

public static StaticBuffer[] getBounds(RelationCategory type,
                       boolean systemTypes)