Here's an implementation of the Blueprints API for Oracle NoSQL Database.
https://github.com/dwmclary/blueprints-oracle-nosqldb
Blueprints is a collection of interfaces, implementations,
ouplementations, and test suites for the property graph data model.
Blueprints is analogous to the JDBC, but for graph databases.
As such, it provides a common set of interfaces to allow developers to
plug-and-play their graph database backend. Moreover, software written
atop Blueprints works over all Blueprints-enabled graph databases.
Within the TinkerPop software stack, Blueprints serves as the
foundational technology for:
Pipes: A lazy, data flow framework
Gremlin: A graph traversal language
Frames: An object-to-graph mapper
Furnace: A graph algorithms package
Rexster: A graph server