org.apache.giraph.graph

Interface VertexChanges<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Type Parameters:

I - Vertex index value

V - Vertex value

E - Edge value

All Known Implementing Classes:

VertexMutations

public interface VertexChanges<I extends org.apache.hadoop.io.WritableComparable,V extends org.apache.hadoop.io.Writable,E extends org.apache.hadoop.io.Writable>

Structure to hold all the possible graph mutations that can occur during a superstep.

Method Summary

Modifier and Type	Method and Description
List<Edge<I,E>>	getAddedEdgeList() Get the added edges for this particular vertex index from the previous superstep
List<Vertex<I,V,E>>	getAddedVertexList() Get the added vertices for this particular vertex index from the previous superstep.
List<I>	getRemovedEdgeList() Get the removed edges by their destination vertex index.
int	getRemovedVertexCount() Get the number of times this vertex was removed in the previous superstep.

Method Detail

getAddedVertexList

List<Vertex<I,V,E>> getAddedVertexList()

Get the added vertices for this particular vertex index from the previous superstep.

Returns:

List of vertices for this vertex index.

getRemovedVertexCount

int getRemovedVertexCount()

Get the number of times this vertex was removed in the previous superstep.

Returns:

Count of time this vertex was removed in the previous superstep

getAddedEdgeList

List<Edge<I,E>> getAddedEdgeList()

Get the added edges for this particular vertex index from the previous superstep

Returns:

List of added edges for this vertex index

getRemovedEdgeList

List<I> getRemovedEdgeList()

Get the removed edges by their destination vertex index.

Returns:

List of destination edges for removal from this vertex index