Method Detail

• getNumEdges

  int getNumEdges​(long lid)

  Get the number of outgoing edges on a vertex with its lid.

  Returns:

  the total number of outbound edges from this vertex

• getEdges

  Iterable<org.apache.giraph.edge.Edge<OID_T,​EDATA_T>> getEdges​(long lid)

  Get a read-only view of the out-edges of this vertex. Note: edge objects returned by this iterable may be invalidated as soon as the next element is requested. Thus, keeping a reference to an edge almost always leads to undesired behavior. Accessing the edges with other methods (e.g., addEdge()) during iteration leads to undefined behavior.

  Returns:

  the out edges (sort order determined by subclass implementation).

• setEdges

  void setEdges​(Iterable<org.apache.giraph.edge.Edge<OID_T,​EDATA_T>> edges)

  Set the outgoing edges for this vertex.

  Parameters:

  edges - Iterable of edges

• getMutableEdges

  Iterable<org.apache.giraph.edge.MutableEdge<OID_T,​EDATA_T>> getMutableEdges()

  Get an iterable of out-edges that can be modified in-place. This can mean changing the current edge value or removing the current edge (by using the iterator version). Note: accessing the edges with other methods (e.g., addEdge()) during iteration leads to undefined behavior.

  Returns:

  An iterable of mutable out-edges

• getEdgeValue

  EDATA_T getEdgeValue​(long lid,
                       OID_T targetVertexId)

  Return the value of the first edge with the given target vertex id, or null if there is no such edge. Note: edge value objects returned by this method may be invalidated by the next call. Thus, keeping a reference to an edge value almost always leads to undesired behavior.

  Parameters:

  targetVertexId - Target vertex id

  Returns:

  EDATA_Tdge value (or null if missing)

• setEdgeValue

  void setEdgeValue​(OID_T targetVertexId,
                    EDATA_T edgeValue)

  If an edge to the target vertex exists, set it to the given edge value. This only makes sense with strict graphs.

  Parameters:

  targetVertexId - Target vertex id

  edgeValue - EDATA_Tdge value

• getAllEdgeValues

  Iterable<EDATA_T> getAllEdgeValues​(OID_T targetVertexId)

  Get an iterable over the values of all edges with the given target vertex id. This only makes sense for multigraphs (i.e. graphs with parallel edges). Note: edge value objects returned by this method may be invalidated as soon as the next element is requested. Thus, keeping a reference to an edge value almost always leads to undesired behavior.

  Parameters:

  targetVertexId - Target vertex id

  Returns:

  Iterable of edge values

• addEdge

  void addEdge​(org.apache.giraph.edge.Edge<OID_T,​EDATA_T> edge)

  Add an edge for this vertex (happens immediately)

  Parameters:

  edge - Edge to add

• removeEdges

  void removeEdges​(OID_T targetVertexId)

  Removes all edges pointing to the given vertex id.

  Parameters:

  targetVertexId - the target vertex id

• unwrapMutableEdges

  void unwrapMutableEdges()

  If a MutableEdgesWrapper was used to provide a mutable iterator, copy any remaining edges to the new OutEdges data structure and keep a direct reference to it (thus discarding the wrapper). Called by the Giraph infrastructure after computation.