org.neo4j.graphdb.traversal

Enum Uniqueness

    • Enum Constant Detail

      • NODE_GLOBAL

        public static final Uniqueness NODE_GLOBAL
        A node cannot be traversed more than once. This is what the legacy traversal framework does.
      • NODE_PATH

        public static final Uniqueness NODE_PATH
        For each returned node there's a unique path from the start node to it.
      • NODE_RECENT

        public static final Uniqueness NODE_RECENT
        This is like NODE_GLOBAL, but only guarantees uniqueness among the most recent visited nodes, with a configurable count. Traversing a huge graph is quite memory intensive in that it keeps track of all the nodes it has visited. For huge graphs a traverser can hog all the memory in the JVM, causing OutOfMemoryError. Together with this Uniqueness you can supply a count, which is the number of most recent visited nodes. This can cause a node to be visited more than once, but scales infinitely.
      • NODE_LEVEL

        public static final Uniqueness NODE_LEVEL
        Entities on the same level are guaranteed to be unique.
      • RELATIONSHIP_GLOBAL

        public static final Uniqueness RELATIONSHIP_GLOBAL
        A relationship cannot be traversed more than once, whereas nodes can.
      • RELATIONSHIP_PATH

        public static final Uniqueness RELATIONSHIP_PATH
        For each returned node there's a (relationship wise) unique path from the start node to it.
      • RELATIONSHIP_RECENT

        public static final Uniqueness RELATIONSHIP_RECENT
        Same as for NODE_RECENT, but for relationships.
      • RELATIONSHIP_LEVEL

        public static final Uniqueness RELATIONSHIP_LEVEL
        Entities on the same level are guaranteed to be unique.
      • NONE

        public static final Uniqueness NONE
        No restriction (the user will have to manage it).
    • Method Detail

      • values

        public static Uniqueness[] values()
        Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:
        for (Uniqueness c : Uniqueness.values())
            System.out.println(c);
        
        Returns:
        an array containing the constants of this enum type, in the order they are declared
      • valueOf

        public static Uniqueness valueOf(String name)
        Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)
        Parameters:
        name - the name of the enum constant to be returned.
        Returns:
        the enum constant with the specified name
        Throws:
        IllegalArgumentException - if this enum type has no constant with the specified name
        NullPointerException - if the argument is null

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