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.BooleanWritable;
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_IsSimple",
value = "_FUNC_(geometry) - return true if geometry is simple",
extended = "Example:\n"
+ " > SELECT _FUNC_(ST_Point(1.5, 2.5)) FROM src LIMIT 1; -- true\n"
+ " > SELECT _FUNC_(ST_LineString(0.,0., 1.,1., 0.,1., 1.,0.)) FROM src LIMIT 1; -- false\n"
)
@HivePdkUnitTests(
cases = {
@HivePdkUnitTest(
query = "select ST_IsSimple(ST_Point(0,0)) from onerow",
result = "true"
),
@HivePdkUnitTest(
query = "select ST_IsSimple(ST_MultiPoint(0,0, 2,2)) from onerow",
result = "true"
),
@HivePdkUnitTest(
query = "select ST_IsSimple(ST_LineString(0.,0., 1.,1., 0.,1., 1.,0.)) from onerow",
result = "false"
),
@HivePdkUnitTest(
query = "select ST_IsSimple(ST_LineString(0,0, 1,0, 1,1, 0,2, 2,2, 1,1, 2,0)) from onerow",
result = "false"
),
@HivePdkUnitTest(
query = "select ST_IsSimple(null) from onerow",
result = "null"
)
}
)
public class ST_IsSimple extends ST_GeometryAccessor {
public static final BooleanWritable resultBoolean = new BooleanWritable();
static final Log LOG = LogFactory.getLog(ST_IsSimple.class.getName());
public BooleanWritable 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 {
resultBoolean.set(ogcGeometry.isSimple());
} catch (Exception e) {
LogUtils.Log_InternalError(LOG, "ST_IsSimple" + e);
return null;
}
return resultBoolean;
}
}