Fix equalsTopo predicate for empty

dr-jts · Oct 11, 2024 · dbc537d · dbc537d
1 parent 2b2baf1
commit dbc537d
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/modules/core/src/main/java/org/locationtech/jts/operation/relateng/RelatePredicate.java b/modules/core/src/main/java/org/locationtech/jts/operation/relateng/RelatePredicate.java
@@ -482,11 +482,20 @@ public static TopologyPredicate equalsTopo() {
       @Override
       public void init(int dimA, int dimB) {
         super.init(dimA, dimB);
-        require(dimA == dimB);
+        //-- don't require equal dims, because EMPTY = EMPTY for all dims
       }
 
+      @Override
+      public boolean requireInteraction() {
+        //-- allow EMPTY = EMPTY
+        return false;
+      };
+
       @Override
       public void init(Envelope envA, Envelope envB) {
+        //-- handle EMPTY = EMPTY cases
+        setValueIf(true, envA.isNull() && envB.isNull());
+
         require(envA.equals(envB));
       }