SqliteGraph class

A persistent graph implementation backed by SQLite.

Stores Node and Relation objects with their properties as key/value pairs in separate tables:

  • nodes: id, type, labelProperty, uniqueProperty, urlProperty, icon
  • relations: id, type, fromNodeId, toNodeId, labelProperty
  • node_properties: nodeId, key, value (key/value pairs for each node)
  • relation_properties: relationId, key, value (key/value pairs for each relation)
Inheritance

Constructors

SqliteGraph({required String dbPath})
Creates a SqliteGraph storing data at dbPath.

Properties

dbPath → String
final
hashCode → int
The hash code for this object.
no setterinherited
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

addNode(Node node, {bool replaceIfExists = true}) → void
Add a new node to graph
override
addRelation(Relation relation, {bool replaceIfExists = true}) → void
Add a new relation to the graph
override
allNodes() → Iterable<Node>
Get all nodes.
override
allRelations() → Iterable<Relation>
Get all relations.
override
clear() → void
Clear the graph. This removes all nodes and relations from the graph.
override
dispose() → void
Closes the database connection and releases associated resources.
getNode(String nodeId) → Node
Get node (by id)
override
getRelation(String relationId) → Relation
Get a relation (by id)
override
getRelationsBetween(String fromNodeId, String toNodeId, {bool bothDirections = true}) → Iterable<Relation>
Get relations from a given node to another (by id)
override
getRelationsFrom(String nodeId) → Iterable<Relation>
Get relations starting from this node
override
getRelationsTo(String nodeId) → Iterable<Relation>
Get relations ending at this node
override
nodeDoesNotExist(String nodeId) → bool
Opposite of nodeDoesNotExist
inherited
nodeExists(String nodeId) → bool
Check if a node exists (by id)
override
nodeIsConnected(String nodeId) → bool
Check if a Node has at least one Relation to or from it.
override
nodeIsDisconnected(String nodeId) → bool
Opposite of nodeIsConnected
inherited
nodeIsLeaf(String nodeId) → bool
Check if a Node has at least one Relation to it, but none from it.
override
nodeIsNotLeaf(String nodeId) → bool
Opposite of nodeIsLeaf
inherited
nodeIsNotOrphan(String nodeId) → bool
Opposite of nodeIsOrphan
inherited
nodeIsOrphan(String nodeId) → bool
Check if a Node has no Relations to or from it.
inherited
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
relationExists(String relationId) → bool
Check if a relation exists (by id)
override
removeNode(String nodeId) → void
Remove a node from the graph (by id)
override
removeRelation(String relationId) → void
Remove a relation (by id)
override
toString() → String
A string representation of this object.
inherited

Operators

operator ==(Object other) → bool
The equality operator.
inherited