com.thinkaurelius.titan.testutil.gen

Class GraphGenerator

java.lang.Object

com.thinkaurelius.titan.testutil.gen.GraphGenerator

public class GraphGenerator
extends Object

Generates Titan graphs. Requires an open, empty Titan graph.

Features:

• Creating types
• Inserting vertices and labeled, directed edges (power-law distribution)
• Setting integer-valued, standard-indexed, single-valued properties on edges and vertices

This uses a Random with a hard-coded seed. However, it also uses DistributionGenerator, which in turn uses a Random seeded with System.currentTimeMillis(). Because of this time-sensitive seed in DistributionGenerator, the output of this class is not sanely reproducible even when its inputs are fixed.

Field Summary

Fields

Modifier and Type	Field and Description
static double	GAMMA
static long	INITIAL_VERTEX_UID

Constructor Summary

Constructors

Constructor and Description
GraphGenerator(Schema schema)

Method Summary

Modifier and Type	Method and Description
void	generateData(TitanGraph g) Generate a scale-free graph using parameters specified in the Schema object provided to this instance's constructor.
void	generateTypesAndData(TitanGraph g)
void	generateTypesAndLoadData(TitanGraph g, InputStream data)
static void	main(String[] args)
static void	writeData(TitanGraph g, OutputStream data)

Methods inherited from class java.lang.Object

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

Field Detail

INITIAL_VERTEX_UID

public static final long INITIAL_VERTEX_UID

See Also:

Constant Field Values

GAMMA

public static final double GAMMA

See Also:

Constant Field Values

Constructor Detail

GraphGenerator

public GraphGenerator(Schema schema)

Method Detail

generateTypesAndData

public void generateTypesAndData(TitanGraph g)

generateData

public void generateData(TitanGraph g)

Generate a scale-free graph using parameters specified in the Schema object provided to this instance's constructor. The types must already exist. The types can be created by either calling generateTypesAndData(TitanGraph) instead of this method or by calling Schema.makeTypes(TitanGraph) before calling this method.

Parameters:

g - A graph with types predefined. If it already contains vertices or relations, they may be overwritten.

writeData

public static void writeData(TitanGraph g,
                             OutputStream data)
                      throws IOException

Throws:

IOException

generateTypesAndLoadData

public void generateTypesAndLoadData(TitanGraph g,
                                     InputStream data)
                              throws IOException

Throws:

IOException

main

public static void main(String[] args)
                 throws IOException

Throws:

IOException