package com.esri.hadoop.hive;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hive.pdk.HivePdkUnitTest;
import org.apache.hive.pdk.HivePdkUnitTests;
import com.esri.core.geometry.SpatialReference;
import com.esri.core.geometry.ogc.OGCGeometry;
@Description(
name = "ST_GeomFromText",
value = "_FUNC_(wkt) - construct an ST_Geometry from OGC well-known text",
extended = "Example:\n"
+ " SELECT _FUNC_('linestring (1 0, 2 3)') FROM src LIMIT 1; -- constructs ST_Linestring\n"
+ " SELECT _FUNC_('multipoint ((1 0), (2 3))') FROM src LIMIT 1; -- constructs ST_MultiPoint\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('point (10.02 20.01)')) from onerow",
result = "POINT (10.02 20.01)"
),
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('linestring (10 10, 20 20)')) from onerow",
result = "LINESTRING (10 10, 20 20)"
),
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('polygon ((0 0, 0 10, 10 10, 0 0))')) from onerow",
result = "POLYGON ((0 0, 0 10, 10 10, 0 0))"
),
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('MULTIPOINT ((10 40), (40 30), (20 20), (30 10))')) from onerow",
result = "MULTIPOINT (10 40, 40 30, 20 20, 30 10)"
),
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('multilinestring ((2 4, 10 10), (20 20, 7 8))')) from onerow",
result = "MULTILINESTRING ((2 4, 10 10), (20 20, 7 8))"
),
@HivePdkUnitTest(
query = "select ST_AsText(ST_GeomFromText('multipolygon (((0 0, 0 1, 1 0, 0 0)), ((2 2, 2 3, 3 2, 2 2)))')) from onerow",
result = "MULTIPOLYGON (((0 0, 0 1, 1 0, 0 0)), ((2 2, 2 3, 3 2, 2 2)))"
)
}
)
public class ST_GeomFromText extends ST_Geometry {
static final Log LOG = LogFactory.getLog(ST_GeomFromText.class.getName());
public BytesWritable evaluate(Text wkt) throws UDFArgumentException {
return evaluate(wkt, 0);
}
public BytesWritable evaluate(Text wkwrap, int wkid) throws UDFArgumentException {
String wkt = wkwrap.toString();
try {
SpatialReference spatialReference = null;
if (wkid != GeometryUtils.WKID_UNKNOWN) {
spatialReference = SpatialReference.create(wkid);
}
OGCGeometry ogcObj = OGCGeometry.fromText(wkt);
ogcObj.setSpatialReference(spatialReference);
return GeometryUtils.geometryToEsriShapeBytesWritable(ogcObj);
} catch (Exception e) { // IllegalArgumentException, GeometryException
LogUtils.Log_InvalidText(LOG, wkt);
return null;
}
}
}