Manipulating the edge collection

ArangoGraph.edgeCollection

ArangoGraph.edgeCollection(String name) : ArangoEdgeCollection

Returns a ArangoEdgeCollection instance for the given edge collection name.

Arguments

  • name: String

    Name of the edge collection

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoGraph graph = db.graph("some-graph");

ArangoEdgeCollection collection = graph.edgeCollection("some-edge-collection");

ArangoGraph.getEdgeDefinitions

ArangoGraph.getEdgeDefinitions() : Collection<String>

Fetches all edge collections from the graph and returns a list of collection names.

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoGraph graph = db.graph("some-graph");

Collection<String> collections = graph.getEdgeDefinitions();

ArangoGraph.addEdgeDefinition

ArangoGraph.addEdgeDefinition(EdgeDefinition definition) : GraphEntity

Adds the given edge definition to the graph.

Arguments

  • definition: EdgeDefinition

    The edge definition

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoGraph graph = db.graph("some-graph");

EdgeDefinition edgeDefinition = new EdgeDefinition()
                                  .collection("edges")
                                  .from("start-vertices")
                                  .to("end-vertices");
graph.addEdgeDefinition(edgeDefinition);
// the edge definition has been added to the graph

ArangoGraph.replaceEdgeDefinition

ArangoGraph.replaceEdgeDefinition(EdgeDefinition definition) : GraphEntity

Change one specific edge definition. This will modify all occurrences of this definition in all graphs known to your database.

Arguments

  • definition: EdgeDefinition

    The edge definition

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoGraph graph = db.graph("some-graph");

EdgeDefinition edgeDefinition = new EdgeDefinition()
                                  .collection("edges")
                                  .from("start-vertices")
                                  .to("end-vertices");
graph.replaceEdgeDefinition(edgeDefinition);
// the edge definition has been modified

ArangoGraph.removeEdgeDefinition

ArangoGraph.removeEdgeDefinition(String definitionName) : GraphEntity

Remove one edge definition from the graph. This will only remove the edge collection, the vertex collections remain untouched and can still be used in your queries.

Arguments

  • definitionName: String

    The name of the edge collection used in the definition

Examples

ArangoDB arango = new ArangoDB.Builder().build();
ArangoDatabase db = arango.db("myDB");
ArangoGraph graph = db.graph("some-graph");

EdgeDefinition edgeDefinition = new EdgeDefinition()
                                  .collection("edges")
                                  .from("start-vertices")
                                  .to("end-vertices");
graph.addEdgeDefinition(edgeDefinition);
// the edge definition has been added to the graph

graph.removeEdgeDefinition("edges");
// the edge definition has been removed