Class EmptyGraphSource

packages/graph/src/Graph.ts:223–276

}

export class EmptyGraphSource<const TSchema extends GraphSchema> implements GraphSource<TSchema> {
  #config: EmptyGraphSourceConfig<TSchema>;
  public constructor(config: EmptyGraphSourceConfig<TSchema>) {
    this.#config = config;
  }
  public get schema(): TSchema {
    return this.#config.schema;
  }

  public getIncomingEdges(_vertexId: ElementId): Iterable<Edge<TSchema, any>> {
    throw new Error("Cannot get incoming edges from an empty graph source.");
  }
  public getOutgoingEdges(_vertexId: ElementId): Iterable<Edge<TSchema, any>> {
    throw new Error("Cannot get outgoing edges from an empty graph source.");
  }
  public getVertexById<TVertexLabel extends VertexLabel<TSchema>>(
    _id: ElementId,
    _options: { throwIfNotFound: true },
  ): Vertex<TSchema, TVertexLabel>;
  public getVertexById<TVertexLabel extends VertexLabel<TSchema>>(
    _id: ElementId,
    _options?: { throwIfNotFound?: false },
  ): Vertex<TSchema, TVertexLabel> | undefined;
  public getVertexById<TVertexLabel extends VertexLabel<TSchema>>(
    _id: ElementId,
    _options?: { throwIfNotFound?: boolean },
  ): Vertex<TSchema, TVertexLabel> | undefined {
    throw new Error("Cannot get vertex by id from an empty graph source.");
  }
  public getVertices<TVertexLabel extends VertexLabel<TSchema>>(
    ..._labels: TVertexLabel[]
  ): Iterable<Vertex<TSchema, TVertexLabel>> {
    throw new Error("Cannot get vertices from an empty graph source.");
  }
  public getEdges<TEdgeLabel extends EdgeLabel<TSchema>>(
    ..._labels: TEdgeLabel[]
  ): Iterable<Edge<TSchema, TEdgeLabel>> {
    throw new Error("Cannot get edges from an empty graph source.");
  }
  public getEdgeById<TEdgeLabel extends EdgeLabel<TSchema>>(
    _id: ElementId,
    _options: { throwIfNotFound: true },
  ): Edge<TSchema, TEdgeLabel>;
  public getEdgeById<TEdgeLabel extends EdgeLabel<TSchema>>(
    _id: ElementId,
    _options?: { throwIfNotFound?: false },
  ): Edge<TSchema, TEdgeLabel> | undefined;
  public getEdgeById<TEdgeLabel extends EdgeLabel<TSchema>>(
    _id: ElementId,
    _options?: { throwIfNotFound?: boolean },
  ): Edge<TSchema, TEdgeLabel> | undefined {
    throw new Error("Cannot get edge by id from an empty graph source.");
  }
}

/**
 * A function that generates a unique identifier.