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.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.hive.ql.exec.UDFArgumentLengthException;
import org.apache.hadoop.hive.serde2.io.DoubleWritable;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hive.pdk.HivePdkUnitTest;
import org.apache.hive.pdk.HivePdkUnitTests;
import com.esri.core.geometry.MultiPoint;
import com.esri.core.geometry.ogc.OGCGeometry;
@Description(
name = "ST_MultiPoint",
value = "_FUNC_(x1, y1, x2, y2, x3, y3) - constructor for 2D multipoint\n" +
"_FUNC_('multipoint( ... )') - constructor for 2D multipoint",
extended = "Example:\n" +
" SELECT _FUNC_(1, 1, 2, 2, 3, 3) from src LIMIT 1; -- multipoint with 3 points\n" +
" SELECT _FUNC_('MULTIPOINT ((10 40), (40 30))') from src LIMIT 1; -- multipoint of 2 points")
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select st_asjson(st_multipoint(1, 1, 2, 2, 3, 3)) from onerow",
result = "{\"points\":[[1.0,1.0],[2.0,2.0],[3.0,3.0]]}"
),
@HivePdkUnitTest(
query = "select ST_GeometryType(ST_MultiPoint('MULTIPOINT ((10 40), (40 30))')) from onerow",
result = "ST_MULTIPOINT"
),
@HivePdkUnitTest(
query = "select ST_Equals(ST_MultiPoint('MULTIPOINT ((10 40), (40 30))'), ST_GeomFromText('MULTIPOINT ((10 40), (40 30))')) from onerow",
result = "true"
)
}
)
public class ST_MultiPoint extends ST_Geometry {
static final Log LOG = LogFactory.getLog(ST_MultiPoint.class.getName());
// Number-pairs constructor
public BytesWritable evaluate(DoubleWritable ... xyPairs) throws UDFArgumentLengthException{
if (xyPairs == null || xyPairs.length == 0 || xyPairs.length%2 != 0) {
LogUtils.Log_VariableArgumentLengthXY(LOG);
return null;
}
try {
MultiPoint mPoint = new MultiPoint();
for (int i=0;i<xyPairs.length;i+=2){
mPoint.add(xyPairs[i].get(), xyPairs[i+1].get());
}
return GeometryUtils.geometryToEsriShapeBytesWritable(OGCGeometry.createFromEsriGeometry(mPoint, null, true));
} catch (Exception e) {
LogUtils.Log_InternalError(LOG, "ST_MultiPoint: " + e);
return null;
}
}
// WKT constructor - can use SetSRID on constructed multi-point
public BytesWritable evaluate(Text wkwrap) throws UDFArgumentException {
String wkt = wkwrap.toString();
try {
OGCGeometry ogcObj = OGCGeometry.fromText(wkt);
ogcObj.setSpatialReference(null);
if (ogcObj.geometryType().equals("MultiPoint")) {
return GeometryUtils.geometryToEsriShapeBytesWritable(ogcObj);
} else {
LogUtils.Log_InvalidType(LOG, GeometryUtils.OGCType.ST_MULTIPOINT, GeometryUtils.OGCType.UNKNOWN);
return null;
}
} catch (Exception e) { // IllegalArgumentException, GeometryException
LogUtils.Log_InvalidText(LOG, wkt);
return null;
}
}
}