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.io.BytesWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hive.pdk.HivePdkUnitTest;
import org.apache.hive.pdk.HivePdkUnitTests;
import com.esri.core.geometry.ogc.OGCGeometry;
@Description(
name = "ST_Dimension",
value = "_FUNC_(geometry) - return spatial dimension of geometry",
extended = "Example:\n"
+ " > SELECT _FUNC_(ST_Point(1.5, 2.5)) FROM src LIMIT 1; -- 0\n"
+ " > SELECT _FUNC_(ST_LineString(1.5,2.5, 3.0,2.2)) FROM src LIMIT 1; -- 1\n"
+ " > SELECT _FUNC_(ST_Polygon(2,0, 2,3, 3,0)) FROM src LIMIT 1; -- 2\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_Dimension(ST_Point(0,0)) from onerow",
result = "0"
),
@HivePdkUnitTest(
query = "select ST_Dimension(ST_LineString(1.5,2.5, 3.0,2.2)) from onerow",
result = "1"
),
@HivePdkUnitTest(
query = "select ST_Dimension(ST_Polygon(1.5,2.5, 3.0,2.2, 2.2,1.1)) from onerow",
result = "2"
),
@HivePdkUnitTest(
query = "select ST_Dimension(ST_MultiPoint(0,0, 2,2)) from onerow",
result = "0"
),
@HivePdkUnitTest(
query = "select ST_Dimension(ST_MultiLineString(array(1, 1, 2, 2), array(10, 10, 20, 20))) from onerow",
result = "1"
),
@HivePdkUnitTest(
query = "select ST_Dimension(ST_MultiPolygon(array(1,1, 1,2, 2,2, 2,1), array(3,3, 3,4, 4,4, 4,3))) from onerow",
result = "2"
),
@HivePdkUnitTest(
query = "select ST_Dimension(null) from onerow",
result = "null"
)
}
)
public class ST_Dimension extends ST_GeometryAccessor {
public static final IntWritable resultInt = new IntWritable();
static final Log LOG = LogFactory.getLog(ST_Dimension.class.getName());
public IntWritable evaluate(BytesWritable geomref) {
if (geomref == null || geomref.getLength() == 0) {
LogUtils.Log_ArgumentsNull(LOG);
return null;
}
OGCGeometry ogcGeometry = GeometryUtils.geometryFromEsriShape(geomref);
if (ogcGeometry == null) {
LogUtils.Log_ArgumentsNull(LOG);
return null;
}
resultInt.set(ogcGeometry.dimension());
return resultInt;
}
}