Class TraversalMergeStep<S,E>
- java.lang.Object
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- org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep<S,E>
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- org.apache.tinkerpop.gremlin.process.traversal.step.map.MapStep<S,E>
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- org.apache.tinkerpop.gremlin.process.traversal.step.map.ScalarMapStep<S,E>
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- org.apache.tinkerpop.gremlin.process.traversal.step.map.TraversalMergeStep<S,E>
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- All Implemented Interfaces:
Serializable
,AutoCloseable
,Cloneable
,Iterator<Traverser.Admin<E>>
,Step<S,E>
,TraversalParent
,ListFunction
public final class TraversalMergeStep<S,E> extends ScalarMapStep<S,E> implements TraversalParent, ListFunction
A map step that returns the merger of the traverser and the provided arguments without duplicates. This is commonly known as a union.- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep
id, labels, nextEnd, nextStep, previousStep, starts, traversal, traverserStepIdAndLabelsSetByChild
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Constructor Summary
Constructors Constructor Description TraversalMergeStep(Traversal.Admin traversal, Object values)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description TraversalMergeStep<S,E>
clone()
Cloning is used to duplicate steps for the purpose of traversal optimization and OLTP replication.List<Traversal.Admin<S,E>>
getLocalChildren()
Set<TraverserRequirement>
getRequirements()
Provide the necessaryTraverserRequirement
that must be met by the traverser in order for the step to function properly.String
getStepName()
Template method used for retrieving the implementing Step's name.int
hashCode()
protected E
map(Traverser.Admin<S> traverser)
void
setTraversal(Traversal.Admin<?,?> parentTraversal)
Set theTraversal
that this step is contained within.-
Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.map.ScalarMapStep
processNextStart
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Methods inherited from class org.apache.tinkerpop.gremlin.process.traversal.step.util.AbstractStep
addLabel, addStart, addStarts, clearLabels, equals, getId, getLabels, getNextStep, getPreviousStep, getStarts, getTraversal, hasNext, hasStarts, isTraverserStepIdAndLabelsSetByChild, next, prepareTraversalForNextStep, removeLabel, reset, setId, setNextStep, setPreviousStep, toString
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Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface java.util.Iterator
forEachRemaining, remove
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Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.util.ListFunction
convertArgumentToCollection, convertArgumentToSet, convertTraversalToCollection, convertTraversalToSet, convertTraverserToCollection, convertTraverserToSet
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Methods inherited from interface org.apache.tinkerpop.gremlin.process.traversal.step.TraversalParent
addGlobalChild, addLocalChild, asStep, close, getGlobalChildren, getSelfAndChildRequirements, integrateChild, removeGlobalChild, removeLocalChild, replaceLocalChild
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Constructor Detail
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TraversalMergeStep
public TraversalMergeStep(Traversal.Admin traversal, Object values)
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Method Detail
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getStepName
public String getStepName()
Description copied from interface:ListFunction
Template method used for retrieving the implementing Step's name.- Specified by:
getStepName
in interfaceListFunction
- Returns:
- this step's name.
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map
protected E map(Traverser.Admin<S> traverser)
- Specified by:
map
in classScalarMapStep<S,E>
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getLocalChildren
public List<Traversal.Admin<S,E>> getLocalChildren()
- Specified by:
getLocalChildren
in interfaceTraversalParent
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getRequirements
public Set<TraverserRequirement> getRequirements()
Description copied from interface:Step
Provide the necessaryTraverserRequirement
that must be met by the traverser in order for the step to function properly. The provided default implements returns an empty set.- Specified by:
getRequirements
in interfaceStep<S,E>
- Returns:
- the set of requirements
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setTraversal
public void setTraversal(Traversal.Admin<?,?> parentTraversal)
Description copied from interface:Step
Set theTraversal
that this step is contained within.- Specified by:
setTraversal
in interfaceStep<S,E>
- Overrides:
setTraversal
in classAbstractStep<S,E>
- Parameters:
parentTraversal
- the new traversal for this step
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clone
public TraversalMergeStep<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 whenStep.reset()
is called. Moreover, the previous and next steps should be set toEmptyStep
.
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hashCode
public int hashCode()
- Overrides:
hashCode
in classAbstractStep<S,E>
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