package com.esri.hadoop.hive;
import java.nio.ByteBuffer;
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.hive.pdk.HivePdkUnitTest;
import org.apache.hive.pdk.HivePdkUnitTests;
import com.esri.core.geometry.ogc.OGCGeometry;
@Description(
name = "ST_AsBinary",
value = "_FUNC_(ST_Geometry) - return Well-Known Binary (WKB) representation of geometry\n",
extended = "Example:\n" +
" SELECT _FUNC_(ST_Point(1, 2)) FROM onerow; -- WKB representation of POINT (1 2)\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_GeometryType(ST_GeomFromWKB(ST_AsBinary(ST_GeomFromText('linestring (10 40, 40 30)')))) from onerow",
result = "ST_LINESTRING"
)
}
)
public class ST_AsBinary extends ST_Geometry {
static final Log LOG = LogFactory.getLog(ST_AsBinary.class.getName());
public BytesWritable 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;
}
try {
ByteBuffer byteBuf = ogcGeometry.asBinary();
byte [] byteArr = byteBuf.array();
return new BytesWritable(byteArr);
} catch (Exception e){
LOG.error(e.getMessage());
return null;
}
}
}