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

Class ComputerAwareStep<S,E>

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, Cloneable, Iterator<Traverser.Admin<E>>, Step<S,E>, GraphComputing

Direct Known Subclasses:

BranchStep, MatchStep, RepeatStep, RepeatStep.RepeatEndStep

public abstract class ComputerAwareStep<S,E>
extends AbstractStep<S,E>
implements GraphComputing

Author:

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

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ComputerAwareStep.EndStep<S>

Field Summary

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

id, labels, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdAndLabelsSetByChild

Constructor Summary

Constructors

Constructor	Description
ComputerAwareStep(Traversal.Admin traversal)

Method Summary

Modifier and Type	Method	Description
ComputerAwareStep<S,E>	clone()	Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication.
protected abstract Iterator<Traverser.Admin<E>>	computerAlgorithm()
void	onGraphComputer()	The step will be executing on a GraphComputer.
protected Traverser.Admin<E>	processNextStart()
void	reset()	Reset the state of the step such that it has no incoming starts.
protected abstract Iterator<Traverser.Admin<E>>	standardAlgorithm()

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

addLabel, addStart, addStarts, clearLabels, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hashCode, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, setId, setNextStep, setPreviousStep, setTraversal, 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.step.GraphComputing

atMaster

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

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

equals, getRequirements

Constructor Details

ComputerAwareStep

public ComputerAwareStep(Traversal.Admin traversal)

Method Details

processNextStart

protected Traverser.Admin<E> processNextStart()
                                       throws NoSuchElementException

Specified by:

processNextStart in class AbstractStep<S,E>

Throws:

NoSuchElementException

onGraphComputer

public void onGraphComputer()

Description copied from interface: GraphComputing

The step will be executing on a GraphComputer.

Specified by:

onGraphComputer in interface GraphComputing

clone

public ComputerAwareStep<S,E> clone()

Description copied from interface: Step

Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication. When cloning a step, it is important that the steps, the cloned step is equivalent to the state of the step when Step.reset() is called. Moreover, the previous and next steps should be set to EmptyStep.

Specified by:

clone in interface Step<S,E>

Overrides:

clone in class AbstractStep<S,E>

Returns:

The cloned step

reset

public void reset()

Description copied from interface: Step

Reset the state of the step such that it has no incoming starts. Internal states are to be reset, but any sideEffect data structures are not to be recreated.

Specified by:

reset in interface Step<S,E>

Overrides:

reset in class AbstractStep<S,E>

standardAlgorithm

protected abstract Iterator<Traverser.Admin<E>> standardAlgorithm()
                                                           throws NoSuchElementException

Throws:

NoSuchElementException

computerAlgorithm

protected abstract Iterator<Traverser.Admin<E>> computerAlgorithm()
                                                           throws NoSuchElementException

Throws:

NoSuchElementException