org.apache.tinkerpop.gremlin.structure

Interface Graph.Features

All Known Implementing Classes:

EmptyGraph.EmptyGraphFeatures, HadoopGraph.HadoopGraphFeatures, Neo4jGraph.Neo4jGraphFeatures, RemoteGraph.RemoteFeatures, StarGraph.StarGraphFeatures, TinkerGraph.TinkerGraphFeatures

Enclosing interface:

Graph

public static interface Graph.Features

An interface that represents the capabilities of a Graph implementation. By default all methods of features return true and it is up to implementers to disable feature they don't support. Users should check features prior to using various functions of TinkerPop to help ensure code portability across implementations. For example, a common usage would be to check if a graph supports transactions prior to calling the commit method on Graph.tx().

As an additional notice to Graph Providers, feature methods will be used by the test suite to determine which tests will be ignored and which will be executed, therefore proper setting of these features is essential to maximizing the amount of testing performed by the suite. Further note, that these methods may be called by the TinkerPop core code to determine what operations may be appropriately executed which will have impact on features utilized by users.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	Graph.Features.DataTypeFeatures Base interface for features that relate to supporting different data types.
static interface	Graph.Features.EdgeFeatures Features that are related to Edge operations.
static interface	Graph.Features.EdgePropertyFeatures Features that are related to Edge Property objects.
static interface	Graph.Features.ElementFeatures Features that are related to Element objects.
static interface	Graph.Features.FeatureSet A marker interface to identify any set of Features.
static interface	Graph.Features.GraphFeatures Features specific to a operations of a "graph".
static interface	Graph.Features.PropertyFeatures A base interface for Edge or Vertex Property features.
static interface	Graph.Features.VariableFeatures Features for Graph.Variables.
static interface	Graph.Features.VertexFeatures Features that are related to Vertex operations.
static interface	Graph.Features.VertexPropertyFeatures Features that are related to Vertex Property objects.

Method Summary

Modifier and Type	Method and Description
default Graph.Features.EdgeFeatures	edge() Gets the features related to "edge" operation.
default Graph.Features.GraphFeatures	graph() Gets the features related to "graph" operation.
default boolean	supports(Class<? extends Graph.Features.FeatureSet> featureClass, String feature) Implementers should not override this method.
default Graph.Features.VertexFeatures	vertex() Gets the features related to "vertex" operation.

Method Detail

graph

default Graph.Features.GraphFeatures graph()

Gets the features related to "graph" operation.

vertex

default Graph.Features.VertexFeatures vertex()

Gets the features related to "vertex" operation.

edge

default Graph.Features.EdgeFeatures edge()

Gets the features related to "edge" operation.

supports

default boolean supports(Class<? extends Graph.Features.FeatureSet> featureClass,
                         String feature)
                  throws NoSuchMethodException,
                         IllegalAccessException,
                         InvocationTargetException

Implementers should not override this method. Note that this method utilizes reflection to check for feature support.

Throws:

NoSuchMethodException

IllegalAccessException

InvocationTargetException