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

Class ScalarMapStep<S,E>

java.lang.Object

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

org.apache.tinkerpop.gremlin.process.traversal.step.map.MapStep<S,E>

org.apache.tinkerpop.gremlin.process.traversal.step.map.ScalarMapStep<S,E>

All Implemented Interfaces:

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

Direct Known Subclasses:

AbstractAddElementStepPlaceholder, AddEdgeStep, AddVertexStep, AsBoolStep, AsDateStep, AsNumberStep, AsStringGlobalStep, AsStringLocalStep, CombineStep, ConcatStep, ConjoinStep, ConstantStep, CountLocalStep, DateAddStep, DateDiffStep, DedupLocalStep, DifferenceStep, DisjunctStep, EdgeOtherVertexStep, ElementMapStep, ElementStep, IdStep, IndexStep, IntersectStep, LabelStep, LambdaMapStep, LengthGlobalStep, LoopsStep, LTrimGlobalStep, MergeStep, OrderLocalStep, ProductStep, ProjectStep, PropertyKeyStep, PropertyMapStep, PropertyValueStep, RangeLocalStep, RangeLocalStepPlaceholder, ReferenceElementStrategy.ReferenceElementStep, ReplaceGlobalStep, ReverseStep, RTrimGlobalStep, SackStep, SampleLocalStep, SplitGlobalStep, StringLocalStep, SubstringGlobalStep, TailLocalStep, TailLocalStepPlaceholder, ToLowerGlobalStep, ToUpperGlobalStep, TrimGlobalStep, WhereTraversalStep.WhereStartStep

public abstract class ScalarMapStep<S,E>
extends MapStep<S,E>

A type of MapStep class which will transform the object of one Traverser into another. This class simply requires the implementation of the map(Traverser.Admin) method to extract the object of the given Traverser and return the transformation of that object as E.

Author:

Marko A. Rodriguez (http://markorodriguez.com), Stephen Mallette (http://stephen.genoprime.com)

See Also:

• Serialized Form

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
ScalarMapStep(Traversal.Admin traversal)

Method Summary

Modifier and Type	Method	Description
protected abstract E	map(Traverser.Admin<S> traverser)
protected Traverser.Admin<E>	processNextStart()

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

addLabel, addStart, addStarts, clearLabels, clone, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hashCode, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, reset, setId, setNextStep, setPreviousStep, setTraversal, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

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

equals, getRequirements

Constructor Details

ScalarMapStep

public ScalarMapStep(Traversal.Admin traversal)

Method Details

processNextStart

protected Traverser.Admin<E> processNextStart()

Specified by:

processNextStart in class AbstractStep<S,E>

map

protected abstract E map(Traverser.Admin<S> traverser)