(sedona) 27/35: [GH-1922] ST_X/Y/Z ON null geometries (#1923)

[jiayu]

This is an automated email from the ASF dual-hosted git repository.

jiayu pushed a commit to branch prepare-1.7.2
in repository https://gitbox.apache.org/repos/asf/sedona.git

commit e55714fe8fb001afcb754e438780ab7a8fe233d9
Author: Javier Goday <jgo...@gmail.com>
AuthorDate: Wed Apr 23 20:29:41 2025 +0200

    [GH-1922] ST_X/Y/Z ON null geometries (#1923)
---
 .../main/java/org/apache/sedona/common/Functions.java  | 12 ++++++------
 .../java/org/apache/sedona/common/FunctionsTest.java   | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/common/src/main/java/org/apache/sedona/common/Functions.java 
b/common/src/main/java/org/apache/sedona/common/Functions.java
index 97e08b7b0f..4e14055d8c 100644
--- a/common/src/main/java/org/apache/sedona/common/Functions.java
+++ b/common/src/main/java/org/apache/sedona/common/Functions.java
@@ -603,28 +603,28 @@ public class Functions {
   }
 
   public static Double x(Geometry geometry) {
-    if (geometry instanceof Point) {
+    if (geometry instanceof Point && geometry.getCoordinate() != null) {
       return geometry.getCoordinate().x;
     }
     return null;
   }
 
   public static Double y(Geometry geometry) {
-    if (geometry instanceof Point) {
+    if (geometry instanceof Point && geometry.getCoordinate() != null) {
       return geometry.getCoordinate().y;
     }
     return null;
   }
 
   public static Double z(Geometry geometry) {
-    if (geometry instanceof Point) {
+    if (geometry instanceof Point && geometry.getCoordinate() != null) {
       return geometry.getCoordinate().z;
     }
     return null;
   }
 
   public static Double m(Geometry geom) {
-    if (geom instanceof Point) {
+    if (geom instanceof Point && geom.getCoordinate() != null) {
       return geom.getCoordinate().getM();
     }
     return null;
@@ -708,12 +708,12 @@ public class Functions {
 
   public static boolean hasM(Geometry geom) {
     Coordinate coord = geom.getCoordinate();
-    return !Double.isNaN(coord.getM());
+    return coord != null && !Double.isNaN(coord.getM());
   }
 
   public static boolean hasZ(Geometry geom) {
     Coordinate coord = geom.getCoordinate();
-    return !Double.isNaN(coord.getZ());
+    return coord != null && !Double.isNaN(coord.getZ());
   }
 
   public static Geometry flipCoordinates(Geometry geometry) {
diff --git a/common/src/test/java/org/apache/sedona/common/FunctionsTest.java 
b/common/src/test/java/org/apache/sedona/common/FunctionsTest.java
index 4819384e70..748c0b6c12 100644
--- a/common/src/test/java/org/apache/sedona/common/FunctionsTest.java
+++ b/common/src/test/java/org/apache/sedona/common/FunctionsTest.java
@@ -4402,4 +4402,22 @@ public class FunctionsTest extends TestBase {
     expected = 2.75;
     assertEquals(expected, actual, 1e-6);
   }
+
+  @Test
+  public void emptyPoint() throws ParseException {
+    Geometry point = Constructors.geomFromEWKT("POINT(1 1)");
+    Geometry emptyPoint = Constructors.geomFromEWKT("POINT EMPTY");
+
+    double actualX = Functions.x(point);
+    double expectedX = 1.0;
+    assertEquals(expectedX, actualX, 1e-6);
+
+    assertNull(Functions.x(emptyPoint));
+    assertNull(Functions.y(emptyPoint));
+    assertNull(Functions.z(emptyPoint));
+    assertNull(Functions.m(emptyPoint));
+
+    assertFalse(Functions.hasM(emptyPoint));
+    assertFalse(Functions.hasZ(emptyPoint));
+  }
 }