[sis] 01/02: Avoid creating inverse transform when not needed.

[desruisseaux]

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

desruisseaux pushed a commit to branch geoapi-4.0
in repository https://gitbox.apache.org/repos/asf/sis.git

commit 5959330e5f2a7ab42c1824b018729e23c142a595
Author: Martin Desruisseaux <martin.desruisse...@geomatys.com>
AuthorDate: Sat Feb 5 18:31:55 2022 +0100

    Avoid creating inverse transform when not needed.
---
 .../sis/referencing/operation/transform/AbstractMathTransform.java  | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git 
a/core/sis-referencing/src/main/java/org/apache/sis/referencing/operation/transform/AbstractMathTransform.java
 
b/core/sis-referencing/src/main/java/org/apache/sis/referencing/operation/transform/AbstractMathTransform.java
index fa74432..27f051d 100644
--- 
a/core/sis-referencing/src/main/java/org/apache/sis/referencing/operation/transform/AbstractMathTransform.java
+++ 
b/core/sis-referencing/src/main/java/org/apache/sis/referencing/operation/transform/AbstractMathTransform.java
@@ -78,7 +78,7 @@ import static 
org.apache.sis.util.ArgumentChecks.ensureDimensionMatches;
  * running the same SIS version.
  *
  * @author  Martin Desruisseaux (IRD, Geomatys)
- * @version 1.0
+ * @version 1.2
  *
  * @see DefaultMathTransformFactory
  * @see org.apache.sis.referencing.operation.AbstractCoordinateOperation
@@ -805,6 +805,10 @@ public abstract class AbstractMathTransform extends 
FormattableObject
         {
             return false;
         }
+        if ((tr1 instanceof LinearTransform) != (tr2 instanceof 
LinearTransform)) {
+            // For avoiding creation of inverse transform for a result that 
should be false.
+            return false;
+        }
         try {
             tr1 = tr1.inverse();
         } catch (NoninvertibleTransformException e) {