org.apache.hadoop.hive.ql.udf.esri.ST_MaxM Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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*
* http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.hadoop.hive.ql.udf.esri;
import com.esri.core.geometry.ogc.OGCGeometry;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.io.BytesWritable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@Description(name = "ST_MaxM",
value = "_FUNC_(geometry) - returns the maximum M coordinate of geometry",
extended = "Example:\n" + " SELECT _FUNC_(ST_PointM(1.5, 2.5, 2)) FROM src LIMIT 1; -- 2\n"
+ " SELECT _FUNC_(ST_LineString('linestring m (1.5 2.5 2, 3.0 2.2 1)')) FROM src LIMIT 1; -- 1\n")
//@HivePdkUnitTests(
// cases = {
// @HivePdkUnitTest(
// query = "select ST_MaxM(ST_PointM(0., 3., 1.)) from onerow",
// result = "1.0"
// ),
// @HivePdkUnitTest(
// query = "select ST_MaxM(ST_GeomFromText('linestring m (10 10 2, 20 20 4)')) from onerow",
// result = "4.0"
// ),
// @HivePdkUnitTest(
// query = "select ST_MaxM(ST_MultiPoint('multipoint m((0 0 1), (2 2 3)')) from onerow",
// result = "3.0"
// ),
// @HivePdkUnitTest(
// query = "select ST_MaxM(ST_Point(1,2)) from onerow",
// result = "null"
// ),
// @HivePdkUnitTest(
// query = "select ST_MaxM(null) from onerow",
// result = "null"
// )
// }
//)
public class ST_MaxM extends ST_GeometryAccessor {
final DoubleWritable resultDouble = new DoubleWritable();
static final Logger LOG = LoggerFactory.getLogger(ST_MaxM.class.getName());
public DoubleWritable 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;
}
if (!ogcGeometry.isMeasured()) {
LogUtils.Log_NotMeasured(LOG);
return null;
}
resultDouble.set(ogcGeometry.MaxMeasure());
return resultDouble;
}
}