[sis] branch geoapi-4.0 updated: Fix wrong calculation of HashMap capacity.

[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


The following commit(s) were added to refs/heads/geoapi-4.0 by this push:
     new e446f48  Fix wrong calculation of HashMap capacity.
e446f48 is described below

commit e446f487af6628b32ec61e7b4b4b83a05ece6a12
Author: Martin Desruisseaux <martin.desruisse...@geomatys.com>
AuthorDate: Mon Sep 10 15:52:43 2018 +0200

    Fix wrong calculation of HashMap capacity.
---
 .../java/org/apache/sis/referencing/crs/AbstractCRS.java   |  2 +-
 .../java/org/apache/sis/util/collection/Containers.java    | 14 ++++++++++----
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git 
a/core/sis-referencing/src/main/java/org/apache/sis/referencing/crs/AbstractCRS.java
 
b/core/sis-referencing/src/main/java/org/apache/sis/referencing/crs/AbstractCRS.java
index b4994ce..c76a353 100644
--- 
a/core/sis-referencing/src/main/java/org/apache/sis/referencing/crs/AbstractCRS.java
+++ 
b/core/sis-referencing/src/main/java/org/apache/sis/referencing/crs/AbstractCRS.java
@@ -461,7 +461,7 @@ public class AbstractCRS extends AbstractReferenceSystem 
implements CoordinateRe
      * @param  formatter  the formatter where to append the coordinate system.
      * @param  cs         the coordinate system to append.
      * @param  unit       the value of {@code 
ReferencingUtilities.getUnit(cs)}.
-     * @param  isWKT1    { @code true} if formatting WKT 1, or {@code false} 
for WKT 2.
+     * @param  isWKT1     {@code true} if formatting WKT 1, or {@code false} 
for WKT 2.
      */
     final void formatCS(final Formatter formatter, final CoordinateSystem cs, 
final Unit<?> unit, final boolean isWKT1) {
         assert unit == ReferencingUtilities.getUnit(cs) : unit;
diff --git 
a/core/sis-utility/src/main/java/org/apache/sis/util/collection/Containers.java 
b/core/sis-utility/src/main/java/org/apache/sis/util/collection/Containers.java
index 9d5a1c7..5bdce5a 100644
--- 
a/core/sis-utility/src/main/java/org/apache/sis/util/collection/Containers.java
+++ 
b/core/sis-utility/src/main/java/org/apache/sis/util/collection/Containers.java
@@ -263,11 +263,17 @@ public final class Containers extends Static {
      * @return the minimal initial capacity to be given to the hash map 
constructor.
      */
     public static int hashMapCapacity(final int count) {
-        int r = count >>> 2;
-        if ((count & 0x3) != 0) {
-            r++;
+        if (count > 0) {
+            /*
+             * Dividing 'count' by 0.75 is equivalent to multiplying by 
1.333333…
+             */
+            int r = count / 3;
+            if ((count % 3) != 0) {
+                r++;
+            }
+            return count + r;
         }
-        return count + r;
+        return 0;
     }
 
     /**