bug 58671: change MissingCellPolicy from class to enum

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1717157 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/java/org/apache/poi/ss/usermodel/Row.java b/src/java/org/apache/poi/ss/usermodel/Row.java
index db9fb3e4fcf064406c24549c1dc712170632c54f..f3ea9c9c1a368f15cc008ac7563f8af70dce6bb8 100644 (file)
--- a/src/java/org/apache/poi/ss/usermodel/Row.java
+++ b/src/java/org/apache/poi/ss/usermodel/Row.java
@@ -221,19 +221,23 @@ public interface Row extends Iterable<Cell> {
      * Used to specify the different possible policies
      *  if for the case of null and blank cells
      */
-    public static final class MissingCellPolicy {
-       private static int NEXT_ID = 1;
+    public static enum MissingCellPolicy {
+        RETURN_NULL_AND_BLANK(),
+        RETURN_BLANK_AS_NULL(),
+        CREATE_NULL_AS_BLANK();
+        
+       private int NEXT_ID = 1;
        public final int id;
        private MissingCellPolicy() {
                this.id = NEXT_ID++;
        }
     }
     /** Missing cells are returned as null, Blank cells are returned as normal */
-    public static final MissingCellPolicy RETURN_NULL_AND_BLANK = new MissingCellPolicy();
-    /** Missing cells are returned as null, as are blank cells */
-    public static final MissingCellPolicy RETURN_BLANK_AS_NULL = new MissingCellPolicy();
+    public static final MissingCellPolicy RETURN_NULL_AND_BLANK = MissingCellPolicy.RETURN_NULL_AND_BLANK;
+    /** Missing cells and blank cells are returned as null */
+    public static final MissingCellPolicy RETURN_BLANK_AS_NULL = MissingCellPolicy.RETURN_BLANK_AS_NULL;
     /** A new, blank cell is created for missing cells. Blank cells are returned as normal */
-    public static final MissingCellPolicy CREATE_NULL_AS_BLANK = new MissingCellPolicy();
+    public static final MissingCellPolicy CREATE_NULL_AS_BLANK = MissingCellPolicy.CREATE_NULL_AS_BLANK;
     
     /**
      * Returns the rows outline level. Increased as you