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_CoordDim",
value = "_FUNC_(geometry) - return count of coordinate components",
extended = "Example:\n"
+ " > SELECT _FUNC_(ST_Point(1.5, 2.5)) FROM src LIMIT 1; -- 2\n"
+ " > SELECT _FUNC_(ST_PointZ(1.5,2.5, 3) FROM src LIMIT 1; -- 3\n"
+ " > SELECT _FUNC_(ST_Point(1.5, 2.5, 3., 4.)) FROM src LIMIT 1; -- 4\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_CoordDim(ST_Point(0., 3.)) from onerow",
result = "2"
),
@HivePdkUnitTest(
query = "select ST_CoordDim(ST_PointZ(0., 3., 1)) from onerow",
result = "3"
),
@HivePdkUnitTest(
query = "select ST_CoordDim(ST_Point(0., 3., 1., 2.)) from onerow",
result = "4"
),
@HivePdkUnitTest(
query = "select ST_CoordDim(null) from onerow",
result = "null"
)
}
)
public class ST_CoordDim extends ST_GeometryAccessor {
public static final IntWritable resultInt = new IntWritable();
static final Log LOG = LogFactory.getLog(ST_Is3D.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){
return null;
}
resultInt.set(ogcGeometry.coordinateDimension());
return resultInt;
}
}