VelocityGraph.Frontenac.Blueprints.Util Namespace

For those graph engines that do not support the low-level querying of the vertices or edges, then DefaultQuery can be used. DefaultQuery assumes, at minimum, that Graph.getVertices() and Graph.getEdges() is implemented by the respective Graph.

For those graph engines that do not support the low-level querying of the edges of a vertex, then DefaultVertexQuery can be used. DefaultVertexQuery assumes, at minimum, that Vertex.getOutEdges() and Vertex.getInEdges() is implemented by the respective Vertex.

The ExceptionFactory provides standard exceptions that should be used by all Blueprints implementations. This ensures that the look-and-feel of all implementations are the same in terms of terminology and punctuation.

A helper class that is used to combine multiple iterables into a single closeable IEnumerable.

This is a helper class for filtering an IEnumerable of elements by their key/value. Useful for Graph implementations that do no support automatic key indices and need to filter on Graph.getVertices/Edges(key,value).

A collection of helpful methods for creating standard toString() representations of graph-related objects.

VerticesFromEdgesIterable is a helper class that returns vertices that meet the direction/label criteria of the incident edges.