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## org.neo4j.graphdb.traversal
Interface TraversalContext

All Superinterfaces:
  TraversalMetadata

    public interface TraversalContext

extends TraversalMetadata

Provides a context for `TraversalBranch`es which they need to move further and report their progress.

Author:
  Mattias Persson

Method Summary
`Evaluation` | `evaluate(TraversalBranch branch, BranchState state)` Evaluates a `TraversalBranch` whether or not to include it in the result and whether or not to continue further down this branch or not.
`boolean` | `isUnique(TraversalBranch branch)` Used for all except branches to check adherence to the traversal uniqueness.
`boolean` | `isUniqueFirst(TraversalBranch branch)` Used for start branches to check adherence to the traversal uniqueness.
`void` | `relationshipTraversed()` Reports that one more relationship has been traversed in this traversal.
`void` | `unnecessaryRelationshipTraversed()` Reports that one more relationship has been traversed, albeit a relationship that hasn't provided any benefit to the traversal.

Methods inherited from interface org.neo4j.graphdb.traversal.TraversalMetadata
`getNumberOfPathsReturned, getNumberOfRelationshipsTraversed`

Method Detail

### relationshipTraversed

    void relationshipTraversed()

  Reports that one more relationship has been traversed in this traversal.

### unnecessaryRelationshipTraversed

    void unnecessaryRelationshipTraversed()

  Reports that one more relationship has been traversed, albeit a relationship that hasn't provided any benefit to the traversal.

### isUniqueFirst

    boolean isUniqueFirst(TraversalBranch branch)

  Used for start branches to check adherence to the traversal uniqueness.

  Parameters:
    `branch` - the `TraversalBranch` to check for uniqueness.
  Returns:
    `true` if the branch is considered unique and is allowed to progress in this traversal.

### isUnique

    boolean isUnique(TraversalBranch branch)

  Used for all except branches to check adherence to the traversal uniqueness.

  Parameters:
    `branch` - the `TraversalBranch` to check for uniqueness.
  Returns:
    `true` if the branch is considered unique and is allowed to progress in this traversal.

### evaluate

    Evaluation evaluate(TraversalBranch branch,
                        BranchState state)

  Evaluates a `TraversalBranch` whether or not to include it in the result and whether or not to continue further down this branch or not.

  Parameters:
    `branch` - the `TraversalBranch` to evaluate.
    `state` - the `BranchState` for the branch.
  Returns:
    an `Evaluation` of the branch in this traversal.

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