bug 59340: lookup IndexedColors by index

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1739539 13f79535-47bb-0310-9956-ffa450edef68

1 files changed, 28 insertions, 0 deletions

diff --git a/src/java/org/apache/poi/ss/usermodel/IndexedColors.java b/src/java/org/apache/poi/ss/usermodel/IndexedColors.java
index 61d7f6818c..92ebc08a1f 100644
--- a/src/java/org/apache/poi/ss/usermodel/IndexedColors.java
+++ b/src/java/org/apache/poi/ss/usermodel/IndexedColors.java
@@ -31,6 +31,7 @@ package org.apache.poi.ss.usermodel;
  */
 public enum IndexedColors {
 
+    // 0-7?
     BLACK(8),
     WHITE(9),
     RED(10),
@@ -50,6 +51,7 @@ public enum IndexedColors {
     CORNFLOWER_BLUE(24),
     MAROON(25),
     LEMON_CHIFFON(26),
+    // 27?
     ORCHID(28),
     CORAL(29),
     ROYAL_BLUE(30),
@@ -80,6 +82,13 @@ public enum IndexedColors {
     GREY_80_PERCENT(63),
     AUTOMATIC(64);
 
+    private final static IndexedColors[] _values = new IndexedColors[65];
+    static {
+        for (IndexedColors color : values()) {
+            _values[color.index] = color;
+        }
+    }
+    
     public final short index;
 
     IndexedColors(int idx){
@@ -94,4 +103,23 @@ public enum IndexedColors {
     public short getIndex(){
         return index;
     }
+    
+    /**
+     * 
+     *
+     * @param index the index of the color
+     * @return the corresponding IndexedColors enum
+     * @throws IllegalArgumentException if index is not a valid IndexedColors
+     * @since 3.15-beta2
+     */
+    public static IndexedColors fromInt(int index) {
+        if (index < 0 || index >= _values.length) {
+            throw new IllegalArgumentException("Illegal IndexedColor index: " + index);
+        }
+        IndexedColors color = _values[index];
+        if (color == null) {
+            throw new IllegalArgumentException("Illegal IndexedColor index: " + index);
+        }
+        return color;
+    }
 }