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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.ql.udf.esri;
import com.esri.core.geometry.Envelope;
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_MinX",
value = "_FUNC_(geometry) - returns the minimum X coordinate of geometry",
extended = "Example:\n" + " > SELECT _FUNC_(ST_Point(1.5, 2.5)) FROM src LIMIT 1; -- 1.5\n"
+ " > SELECT _FUNC_(ST_LineString(1.5,2.5, 3.0,2.2)) FROM src LIMIT 1; -- 3.0\n")
//@HivePdkUnitTests(
// cases = {
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_Point(1,2)) from onerow",
// result = "1"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_LineString(1.5,2.5, 3.0,2.2)) from onerow",
// result = "1.5"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_Polygon(1, 1, 1, 4, 4, 4, 4, 1)) from onerow",
// result = "1"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_MultiPoint(0,0, 2,2)) from onerow",
// result = "0"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_MultiLineString(array(1, 1, 2, 2), array(10, 10, 20, 20))) from onerow",
// result = "1"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(ST_MultiPolygon(array(1,1, 1,2, 2,2, 2,1), array(3,3, 3,4, 4,4, 4,3))) from onerow",
// result = "1"
// ),
// @HivePdkUnitTest(
// query = "select ST_MinX(null) from onerow",
// result = "null"
// )
// }
//)
public class ST_MinX extends ST_GeometryAccessor {
final DoubleWritable resultDouble = new DoubleWritable();
static final Logger LOG = LoggerFactory.getLogger(ST_MinX.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;
}
Envelope envBound = new Envelope();
ogcGeometry.getEsriGeometry().queryEnvelope(envBound);
resultDouble.set(envBound.getXMin());
return resultDouble;
}
}
