Examples with IsEdgeValidator uk.gov.gchq.gaffer.data.IsEdgeValidator used on opensource projects

Example 1 with IsEdgeValidator

use of uk.gov.gchq.gaffer.data.IsEdgeValidator in project Gaffer by gchq.

the class LoadAndQuery7 method run.

public Iterable<Edge> run() throws OperationException {
    // [user] Create a user
    // ---------------------------------------------------------
    final User user = new User("user01");
    // ---------------------------------------------------------
    // [graph] create a graph using our schema and store properties
    // ---------------------------------------------------------
    final Graph graph = new Graph.Builder().addSchemas(getSchemas()).storeProperties(getStoreProperties()).build();
    // ---------------------------------------------------------
    // [add] add the edges to the graph using an operation chain consisting of:
    // generateElements - generating edges from the data (note these are directed edges)
    // addElements - add the edges to the graph
    // ---------------------------------------------------------
    final OperationChain addOpChain = new OperationChain.Builder().first(new GenerateElements.Builder<String>().generator(new DataGenerator7()).objects(DataUtils.loadData(getData())).build()).then(new AddElements()).build();
    graph.execute(addOpChain, user);
    // ---------------------------------------------------------
    // Create some starting seeds for the sub graph.
    final Iterable<EntitySeed> seeds = Lists.newArrayList(new EntitySeed("1"));
    // Create a view to return only edges that have a count more than 1
    // Note we could have used a different view for each hop in order to
    // specify the edges we wish to hop down or to attempt to prevent caching
    // duplicate edges.
    final View view = new View.Builder().edge("data", new ViewElementDefinition.Builder().preAggregationFilter(new ElementFilter.Builder().select("count").execute(new IsMoreThan(1)).build()).build()).build();
    // [extractor] Create a generator that will extract entity seeds
    // This generator will extract just the destination vertices from edges
    // and skip any entities.
    // ---------------------------------------------------------
    final EntitySeedExtractor destVerticesExtractor = new EntitySeedExtractor(new IsEdgeValidator(), new AlwaysValid<>(), true, IdentifierType.DESTINATION);
    // ---------------------------------------------------------
    // [get] Create a sub graph
    // Start getting related edges with the given seeds.
    // Then update the export with the results
    // Between each hop we need to extract the destination vertices of the
    // previous edges.
    // Finally finish off by returning all the edges in the export.
    // ---------------------------------------------------------
    final OperationChain opChain = new OperationChain.Builder().first(new GetEdges.Builder<EntitySeed>().seeds(seeds).inOutType(IncludeIncomingOutgoingType.OUTGOING).view(view).build()).then(new ExportToSet()).then(new GenerateObjects<Edge, EntitySeed>(destVerticesExtractor)).then(new GetEdges.Builder<EntitySeed>().inOutType(IncludeIncomingOutgoingType.OUTGOING).view(view).build()).then(new ExportToSet()).then(new GetSetExport()).build();
    final Iterable<Edge> subGraph = (Iterable<Edge>) graph.execute(opChain, user);
    // ---------------------------------------------------------
    log("\nSub graph:");
    for (final Edge edge : subGraph) {
        log("SUB_GRAPH", edge.toString());
    }
    return subGraph;
}