MATH-424

Safe handling of internal data.


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1003606 13f79535-47bb-0310-9956-ffa450edef68

src/main/java/org/apache/commons/math/exception/MatrixDimensionMismatchException.java

@@ -50,24 +50,24 @@ public class MatrixDimensionMismatchException extends MultiDimensionMismatchExce
      * @return the expected row dimension.
      */
     public int getWrongRowDimension() {
-        return getWrongDimensions()[0];
+        return getWrongDimension(0);
     }
     /**
      * @return the expected row dimension.
      */
     public int getExpectedRowDimension() {
-        return getExpectedDimensions()[0];
+        return getExpectedDimension(0);
     }
     /**
      * @return the wrong column dimension.
      */
     public int getWrongColumnDimension() {
-        return getWrongDimensions()[1];
+        return getWrongDimension(1);
     }
     /**
      * @return the expected column dimension.
      */
     public int getExpectedColumnDimension() {
-        return getExpectedDimensions()[1];
+        return getExpectedDimension(1);
     }
 }

src/main/java/org/apache/commons/math/exception/MultiDimensionMismatchException.java

@@ -62,15 +62,29 @@ public class MultiDimensionMismatchException extends MathIllegalArgumentExceptio
     }
 
     /**
-     * @return a reference to the array containing the wrong dimensions.
+     * @return an array containing the wrong dimensions.
      */
     public Integer[] getWrongDimensions() {
-        return wrong;
+        return wrong.clone();
     }
     /**
-     * @return a reference to the array containing the expected dimensions.
+     * @return an array containing the expected dimensions.
      */
     public Integer[] getExpectedDimensions() {
-        return expected;
+        return expected.clone();
+    }
+
+    /**
+     * @param index Dimension index.
+     * @return the wrong dimension stored at {@code index}.
+     */
+    public int getWrongDimension(int index) {
+        return wrong[index];
+    }
+    /**
+     * @return an the expected dimension stored at {@code index}..
+     */
+    public int getExpectedDimension(int index) {
+        return expected[index];
     }
 }