object TraversalHelper
Gremlin IR manipulation utilities
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def
countInTraversals[R](extractor: PartialFunction[Seq[GremlinStep], R])(steps: Seq[GremlinStep]): Map[R, Int]
Count occurrences in top-level and all nested traversals starting from the bottom and going up.
Count occurrences in top-level and all nested traversals starting from the bottom and going up.
- extractor
matching and mapping function
- steps
top-level traversal
- returns
map with number of occurrences of extractor result
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def
extract[R](extractor: PartialFunction[Seq[GremlinStep], R])(steps: Seq[GremlinStep]): Seq[R]
Finds matching parts of an IR sequence and maps occurrences.
Finds matching parts of an IR sequence and maps occurrences.
- R
mapping result
- extractor
matching and mapping function
- steps
IR sequence
- returns
list of extracted values
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def
foldTraversals[R](z: R)(op: (R, Seq[GremlinStep]) ⇒ R)(steps: Seq[GremlinStep]): R
Folds top-level and all nested traversals starting from the top and going down.
Folds top-level and all nested traversals starting from the top and going down.
- R
folding result type
- z
start value
- op
folding operator
- steps
top-level traversal
- returns
folding result
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isInstanceOf[T0]: Boolean
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def
mapTraversals(f: (Seq[GremlinStep]) ⇒ Seq[GremlinStep])(steps: Seq[GremlinStep]): Seq[GremlinStep]
Maps top-level and all nested traversals starting from the bottom and going up.
Maps top-level and all nested traversals starting from the bottom and going up.
- f
mapping function
- steps
top-level traversal
- returns
mapping result
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def
replace(replacer: PartialFunction[Seq[GremlinStep], Seq[GremlinStep]])(steps: Seq[GremlinStep]): Seq[GremlinStep]
Finds matching parts of an IR sequence and replaces them.
Finds matching parts of an IR sequence and replaces them.
- replacer
matching and replacing function
- steps
IR sequence
- returns
rewritten IR sequence
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def
split(splitMode: SplitMode, splitter: (GremlinStep) ⇒ Boolean)(steps: Seq[GremlinStep]): Seq[Seq[GremlinStep]]
Finds matching steps in the IR sequence and splits the sequence in segments, with each matching step marking the end of a segment.
Finds matching steps in the IR sequence and splits the sequence in segments, with each matching step marking the end of a segment.
- splitter
matching function
- steps
IR sequence
- returns
IR sequence segments
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- object AfterStep extends SplitMode with Product with Serializable
- object BeforeStep extends SplitMode with Product with Serializable