Examples with ScalarFunction io.prestosql.spi.function.ScalarFunction used on opensource projects

Example 21 with ScalarFunction

use of io.prestosql.spi.function.ScalarFunction in project hetu-core by openlookeng.

the class GeoFunctions method stInteriorRingN.

@SqlNullable
@Description("Returns the interior ring element at the specified index (indices start at 1)")
@ScalarFunction("ST_InteriorRingN")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stInteriorRingN(@SqlType(GEOMETRY_TYPE_NAME) Slice input, @SqlType(INTEGER) long index) {
    OGCGeometry geometry = deserialize(input);
    validateType("ST_InteriorRingN", geometry, EnumSet.of(POLYGON));
    OGCPolygon polygon = (OGCPolygon) geometry;
    if (index < 1 || index > polygon.numInteriorRing()) {
        return null;
    }
    OGCGeometry interiorRing = polygon.interiorRingN(toIntExact(index) - 1);
    return serialize(interiorRing);
}

Example 22 with ScalarFunction

use of io.prestosql.spi.function.ScalarFunction in project hetu-core by openlookeng.

the class GeoFunctions method stCentroid.

@Description("Returns the Point value that is the mathematical centroid of a Geometry")
@ScalarFunction("ST_Centroid")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stCentroid(@SqlType(GEOMETRY_TYPE_NAME) Slice input) {
    OGCGeometry geometry = deserialize(input);
    validateType("ST_Centroid", geometry, EnumSet.of(POINT, MULTI_POINT, LINE_STRING, MULTI_LINE_STRING, POLYGON, MULTI_POLYGON));
    GeometryType geometryType = GeometryType.getForEsriGeometryType(geometry.geometryType());
    if (geometryType == GeometryType.POINT) {
        return input;
    }
    int pointCount = ((MultiVertexGeometry) geometry.getEsriGeometry()).getPointCount();
    if (pointCount == 0) {
        return serialize(createFromEsriGeometry(new Point(), geometry.getEsriSpatialReference()));
    }
    Point centroid;
    switch(geometryType) {
        case MULTI_POINT:
            centroid = computePointsCentroid((MultiVertexGeometry) geometry.getEsriGeometry());
            break;
        case LINE_STRING:
        case MULTI_LINE_STRING:
            centroid = computeLineCentroid((Polyline) geometry.getEsriGeometry());
            break;
        case POLYGON:
            centroid = computePolygonCentroid((Polygon) geometry.getEsriGeometry());
            break;
        case MULTI_POLYGON:
            centroid = computeMultiPolygonCentroid((OGCMultiPolygon) geometry);
            break;
        default:
            throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "Unexpected geometry type: " + geometryType);
    }
    return serialize(createFromEsriGeometry(centroid, geometry.getEsriSpatialReference()));
}

Example 23 with ScalarFunction

use of io.prestosql.spi.function.ScalarFunction in project hetu-core by openlookeng.

the class GeoFunctions method spatialPartitions.

@ScalarFunction
@SqlNullable
@Description("Returns an array of spatial partition IDs for a geometry representing a set of points within specified distance from the input geometry")
@SqlType("array(integer)")
public static Block spatialPartitions(@SqlType(KdbTreeType.NAME) Object kdbTree, @SqlType(GEOMETRY_TYPE_NAME) Slice geometry, @SqlType(DOUBLE) double distance) {
    if (isNaN(distance)) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "distance is NaN");
    }
    if (isInfinite(distance)) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "distance is infinite");
    }
    if (distance < 0) {
        throw new PrestoException(INVALID_FUNCTION_ARGUMENT, "distance is negative");
    }
    Envelope envelope = deserializeEnvelope(geometry);
    if (envelope == null) {
        return null;
    }
    Rectangle expandedEnvelope2D = new Rectangle(envelope.getXMin() - distance, envelope.getYMin() - distance, envelope.getXMax() + distance, envelope.getYMax() + distance);
    return spatialPartitions((KdbTree) kdbTree, expandedEnvelope2D);
}

Example 24 with ScalarFunction

use of io.prestosql.spi.function.ScalarFunction in project hetu-core by openlookeng.

the class GeoFunctions method parseLine.

@Description("Returns a Geometry type LineString object from Well-Known Text representation (WKT)")
@ScalarFunction("ST_LineFromText")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice parseLine(@SqlType(VARCHAR) Slice input) {
    OGCGeometry geometry = geometryFromText(input);
    validateType("ST_LineFromText", geometry, EnumSet.of(LINE_STRING));
    return serialize(geometry);
}

Example 25 with ScalarFunction

use of io.prestosql.spi.function.ScalarFunction in project hetu-core by openlookeng.

the class GeoFunctions method stIsClosed.

@SqlNullable
@Description("Returns TRUE if the LineString or Multi-LineString's start and end points are coincident")
@ScalarFunction("ST_IsClosed")
@SqlType(BOOLEAN)
public static Boolean stIsClosed(@SqlType(GEOMETRY_TYPE_NAME) Slice input) {
    OGCGeometry geometry = deserialize(input);
    validateType("ST_IsClosed", geometry, EnumSet.of(LINE_STRING, MULTI_LINE_STRING));
    MultiPath lines = (MultiPath) geometry.getEsriGeometry();
    int pathCount = lines.getPathCount();
    for (int i = 0; i < pathCount; i++) {
        Point start = lines.getPoint(lines.getPathStart(i));
        Point end = lines.getPoint(lines.getPathEnd(i) - 1);
        if (!end.equals(start)) {
            return false;
        }
    }
    return true;
}