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.io.BytesWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hive.pdk.HivePdkUnitTest;
import org.apache.hive.pdk.HivePdkUnitTests;
import com.esri.core.geometry.ogc.OGCGeometry;
import com.esri.core.geometry.ogc.OGCPolygon;
@Description(
name = "ST_NumInteriorRing",
value = "_FUNC_(ST_Polygon) - return the number of interior rings in the polygon",
extended = "Example:\n"
+ " SELECT _FUNC_(ST_Polygon(1,1, 1,4, 4,1)) FROM src LIMIT 1; -- 0\n"
+ " SELECT _FUNC_(ST_Polygon('polygon ((0 0, 8 0, 0 8, 0 0), (1 1, 1 5, 5 1, 1 1))')) FROM src LIMIT 1; -- 1\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_NumInteriorRing(ST_Polygon('polygon ((1 1, 4 1, 1 4))')) from onerow",
result = "0"
),
@HivePdkUnitTest(
query = "select ST_NumInteriorRing(ST_Polygon('polygon ((0 0, 8 0, 0 8, 0 0), (1 1, 1 5, 5 1, 1 1))')) from onerow",
result = "1"
),
@HivePdkUnitTest(
query = "select ST_NumInteriorRing(null) from onerow",
result = "null"
)
}
)
public class ST_NumInteriorRing extends ST_GeometryAccessor {
static final Log LOG = LogFactory.getLog(ST_NumInteriorRing.class.getName());
public static final IntWritable resultInt = new IntWritable();
public IntWritable 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 (GeometryUtils.getType(geomref) == GeometryUtils.OGCType.ST_POLYGON) {
try {
resultInt.set(((OGCPolygon)(ogcGeometry)).numInteriorRing());
return resultInt;
} catch (Exception e) {
LogUtils.Log_InternalError(LOG, "ST_NumInteriorRing: " + e);
return null;
}
} else {
LogUtils.Log_InvalidType(LOG, GeometryUtils.OGCType.ST_POLYGON, GeometryUtils.getType(geomref));
return null;
}
}
}