org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration

Class SeedStrategy

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy<TraversalStrategy.DecorationStrategy>

org.apache.tinkerpop.gremlin.process.traversal.strategy.decoration.SeedStrategy

All Implemented Interfaces:

Serializable, Comparable<Class<? extends TraversalStrategy>>, TraversalStrategy<TraversalStrategy.DecorationStrategy>, TraversalStrategy.DecorationStrategy

public class SeedStrategy
extends AbstractTraversalStrategy<TraversalStrategy.DecorationStrategy>
implements TraversalStrategy.DecorationStrategy

A strategy that resets the specified seed value for Seedable steps, which in turn will produce deterministic results from those steps. It is important to note that when using this strategy that it only guarantees deterministic results from a step but not from an entire traversal. For example, if a graph does no guarantee iteration order for g.V() then repeated runs of g.V().coin(0.5) with this strategy will return the same number of results but not necessarily the same ones. The same problem can occur in OLAP-based traversals where iteration order is not explicitly guaranteed. The only way to ensure completely deterministic results in that sense is to apply some form of order() in these cases

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

TraversalStrategy.DecorationStrategy, TraversalStrategy.FinalizationStrategy, TraversalStrategy.OptimizationStrategy, TraversalStrategy.ProviderOptimizationStrategy, TraversalStrategy.VerificationStrategy

Field Summary

Fields

Modifier and Type	Field and Description
static String	ID_SEED

Fields inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

STRATEGY

Constructor Summary

Constructors

Constructor and Description
SeedStrategy(long seed)

Method Summary

Modifier and Type	Method and Description
void	apply(Traversal.Admin<?,?> traversal)
static SeedStrategy	create(org.apache.commons.configuration2.Configuration configuration)
org.apache.commons.configuration2.Configuration	getConfiguration() Get the configuration representation of this strategy.
long	getSeed()

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.strategy.AbstractTraversalStrategy

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy.DecorationStrategy

compareTo, getTraversalCategory

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.TraversalStrategy

applyPost, applyPrior

Field Detail

ID_SEED

public static final String ID_SEED

See Also:

Constant Field Values

Constructor Detail

SeedStrategy

public SeedStrategy(long seed)

Method Detail

getSeed

public long getSeed()

apply

public void apply(Traversal.Admin<?,?> traversal)

Specified by:

apply in interface TraversalStrategy<TraversalStrategy.DecorationStrategy>

create

public static SeedStrategy create(org.apache.commons.configuration2.Configuration configuration)

getConfiguration

public org.apache.commons.configuration2.Configuration getConfiguration()

Description copied from interface: TraversalStrategy

Get the configuration representation of this strategy. This is useful for converting a strategy into a serialized form.

Specified by:

getConfiguration in interface TraversalStrategy<TraversalStrategy.DecorationStrategy>

Returns:

the configuration used to create this strategy