Examples with DirectionalStep nl.knaw.huygens.timbuctoo.v5.graphql.defaultconfiguration.DirectionalStep used on opensource projects

Example 1 with DirectionalStep

use of nl.knaw.huygens.timbuctoo.v5.graphql.defaultconfiguration.DirectionalStep in project timbuctoo by HuygensING.

the class SummaryPropDataRetriever method getDataQuad.

private Optional<CursorQuad> getDataQuad(List<DirectionalStep> path, String uri, Optional<Graph> graph, QuadStore quadStore) {
    /*
     * A collect of the data might look a bit nicer, but that will cause all the data to be loaded from the database.
     * This way only the data needed is retrieved.
     * See https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html#StreamOps for more info.
     */
    Optional<CursorQuad> foundQuad;
    DirectionalStep firstStep = path.get(0);
    try (Stream<CursorQuad> quads = quadStore.getQuadsInGraph(uri, firstStep.getStep(), firstStep.getDirection(), "", graph)) {
        foundQuad = quads.map(quad -> {
            if (path.size() > 1) {
                /*
           * make sure paths are not further retrieved, when the object has a value type
           * this could lead to false positives if the value of the property is a uri used as part of the path
           */
                if (quad.getValuetype().isPresent()) {
                    return Optional.<CursorQuad>empty();
                }
                return getDataQuad(path.subList(1, path.size()), quad.getObject(), graph, quadStore);
            } else {
                return Optional.of(quad);
            }
        }).filter(Optional::isPresent).findFirst().map(Optional::get);
    }
    return foundQuad;
}

Example 2 with DirectionalStep

use of nl.knaw.huygens.timbuctoo.v5.graphql.defaultconfiguration.DirectionalStep in project timbuctoo by HuygensING.

the class SummaryPropDataRetriever method getDataQuad.

private Optional<CursorQuad> getDataQuad(List<DirectionalStep> path, String uri, QuadStore quadStore) {
    /*
     * A collect of the data might look a bit nicer, but that will cause all the data to be loaded from the database.
     * This way only the data needed is retrieved.
     * See https://docs.oracle.com/javase/8/docs/api/java/util/stream/package-summary.html#StreamOps for more info.
     */
    Optional<CursorQuad> foundQuad;
    DirectionalStep firstStep = path.get(0);
    try (Stream<CursorQuad> quads = quadStore.getQuads(uri, firstStep.getStep(), firstStep.getDirection(), "")) {
        foundQuad = quads.map(quad -> {
            if (path.size() > 1) {
                /*
           * make sure paths are not further retrieved, when the object has a value type
           * this could lead to false positives if the value of the property is a uri used as part of the path
           */
                if (quad.getValuetype().isPresent()) {
                    return Optional.<CursorQuad>empty();
                }
                return getDataQuad(path.subList(1, path.size()), quad.getObject(), quadStore);
            } else {
                return Optional.of(quad);
            }
        }).filter(Optional::isPresent).findFirst().map(Optional::get);
    }
    return foundQuad;
}