org.apache.hadoop.hive.ql.udf.esri.ST_LineFromWKB Maven / Gradle / Ivy
/*
* 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.SpatialReference;
import com.esri.core.geometry.ogc.OGCGeometry;
import org.apache.hadoop.hive.ql.exec.Description;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.io.BytesWritable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.nio.ByteBuffer;
@Description(name = "ST_LineFromWKB",
value = "_FUNC_(wkb) - construct an ST_LineString from OGC well-known binary",
extended = "Example:\n"
+ " SELECT _FUNC_(ST_AsBinary(ST_GeomFromText('linestring (1 0, 2 3)'))) FROM src LIMIT 1; -- constructs ST_Linestring\n")
//@HivePdkUnitTests(
// cases = {
// @HivePdkUnitTest(
// query = "select ST_GeometryType(ST_LineFromWKB(ST_AsBinary(ST_GeomFromText('linestring (10 10, 20 20)')))) from onerow",
// result = "ST_LINESTRING"
// ),
// @HivePdkUnitTest(
// query = "select ST_Equals(ST_LineFromWKB(ST_AsBinary(ST_GeomFromText('linestring (10 10, 20 20)'))), ST_GeomFromText('linestring (10 10, 20 20)')) from onerow",
// result = "true"
// )
// }
// )
public class ST_LineFromWKB extends ST_Geometry {
static final Logger LOG = LoggerFactory.getLogger(ST_LineFromWKB.class.getName());
public BytesWritable evaluate(BytesWritable wkb) throws UDFArgumentException {
return evaluate(wkb, 0);
}
public BytesWritable evaluate(BytesWritable wkb, int wkid) throws UDFArgumentException {
try {
SpatialReference spatialReference = null;
if (wkid != GeometryUtils.WKID_UNKNOWN) {
spatialReference = SpatialReference.create(wkid);
}
byte[] byteArr = wkb.getBytes();
ByteBuffer byteBuf = ByteBuffer.allocate(byteArr.length);
byteBuf.put(byteArr);
OGCGeometry ogcObj = OGCGeometry.fromBinary(byteBuf);
ogcObj.setSpatialReference(spatialReference);
if (ogcObj.geometryType().equals("LineString")) {
return GeometryUtils.geometryToEsriShapeBytesWritable(ogcObj);
} else {
LogUtils.Log_InvalidType(LOG, GeometryUtils.OGCType.ST_LINESTRING, GeometryUtils.OGCType.UNKNOWN);
return null;
}
} catch (Exception e) { // IllegalArgumentException, GeometryException
LOG.error(e.getMessage());
return null;
}
}
}