org.apache.tinkerpop.gremlin.process.traversal.util

Class ScriptTraversal<S,E>

java.lang.Object

org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal<S,E>

org.apache.tinkerpop.gremlin.process.traversal.util.ScriptTraversal<S,E>

All Implemented Interfaces:

Serializable, AutoCloseable, Cloneable, Iterator<E>, Traversal<S,E>, Traversal.Admin<S,E>

public final class ScriptTraversal<S,E>
extends DefaultTraversal<S,E>

ScriptTraversal encapsulates a ScriptEngine and a script which is compiled into a Traversal at Admin#applyStrategies(). This is useful for serializing traversals as the compilation can happen on the remote end where the traversal will ultimately be processed.

Author:

Marko A. Rodriguez (http://markorodriguez.com)

See Also:

Serialized Form

Nested Class Summary

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

Traversal.Admin<S,E>, Traversal.Exceptions, Traversal.Symbols

Field Summary

Fields inherited from class org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal

bytecode, generator, graph, locked, parent, requirements, sideEffects, steps, strategies, unmodifiableSteps

Constructor Summary

Constructors

Constructor and Description
ScriptTraversal(TraversalSource traversalSource, String scriptEngine, String script, Object... bindings)

Method Summary

Modifier and Type	Method and Description
void	applyStrategies() Apply the registered TraversalStrategies to the traversal.

Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.util.DefaultTraversal

addStart, addStarts, addStep, asAdmin, clone, equals, getBytecode, getEndStep, getGraph, getParent, getSideEffects, getStartStep, getSteps, getStrategies, getTraverserGenerator, getTraverserRequirements, hashCode, hasNext, isLocked, next, nextTraverser, removeStep, reset, setGraph, setParent, setSideEffects, setStrategies, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.Traversal.Admin

addStep, equals, removeStep

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

close, explain, fill, forEachRemaining, forEachRemaining, iterate, next, profile, promise, toBulkSet, toList, toSet, toStream, tryNext

Methods inherited from interface java.util.Iterator

remove

Constructor Detail

ScriptTraversal

public ScriptTraversal(TraversalSource traversalSource,
                       String scriptEngine,
                       String script,
                       Object... bindings)

Method Detail

applyStrategies

public void applyStrategies()
                     throws IllegalStateException

Description copied from interface: Traversal.Admin

Apply the registered TraversalStrategies to the traversal. Once the strategies are applied, the traversal is "locked" and can no longer have steps added to it. The order of operations for strategy applications should be: globally id steps, apply strategies to root traversal, then to nested traversals.

Specified by:

applyStrategies in interface Traversal.Admin<S,E>

Overrides:

applyStrategies in class DefaultTraversal<S,E>

Throws:

IllegalStateException - if the TraversalStrategies have already been applied