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 com.esri.core.geometry.ogc.OGCGeometry;
@Description(
name = "ST_Relate",
value = "_FUNC_(ST_Geometry1, ST_Geometry2) - return true if ST_Geometry1 has the specified DE-9IM relationship with ST_Geometry2",
extended = "Example:\n" +
" SELECT _FUNC_(st_polygon(2,0, 2,1, 3,1), ST_Polygon(1,1, 1,4, 4,4, 4,1), '****T****') from src LIMIT 1; -- true\n" +
" SELECT _FUNC_(st_polygon(2,0, 2,1, 3,1), ST_Polygon(1,1, 1,4, 4,4, 4,1), 'T********') from src LIMIT 1; -- false\n" +
" SELECT _FUNC_(st_linestring(0,0, 3,3), ST_linestring(1,1, 4,4), 'T********') from src LIMIT 1; -- true\n" +
" SELECT _FUNC_(st_linestring(0,0, 3,3), ST_linestring(1,1, 4,4), '****T****') from src LIMIT 1; -- false\n"
)
public class ST_Relate extends ST_GeometryRelational {
public static final BooleanWritable resultBoolean = new BooleanWritable();
static final Log LOG = LogFactory.getLog(ST_Relate.class.getName());
public BooleanWritable evaluate(BytesWritable geometryref1, BytesWritable geometryref2, String relation)
{
if (geometryref1 == null || geometryref2 == null || relation == null ||
geometryref1.getLength() == 0 || geometryref2.getLength() == 0) {
LogUtils.Log_ArgumentsNull(LOG);
return null;
}
if (!GeometryUtils.compareSpatialReferences(geometryref1, geometryref2)) {
LogUtils.Log_SRIDMismatch(LOG, geometryref1, geometryref2);
return null;
}
OGCGeometry ogcGeom1 = GeometryUtils.geometryFromEsriShape(geometryref1);
OGCGeometry ogcGeom2 = GeometryUtils.geometryFromEsriShape(geometryref2);
if (ogcGeom1 == null || ogcGeom2 == null){
LogUtils.Log_ArgumentsNull(LOG);
return null;
}
try {
resultBoolean.set(ogcGeom1.relate(ogcGeom2, relation));
return resultBoolean;
} catch (Exception e) {
LogUtils.Log_InternalError(LOG, "ST_Relate: " + e);
return null;
}
}
}