From 220e829b704c7dbdc57b0f5aad4aa73717e59e11 Mon Sep 17 00:00:00 2001
From: Henri Yandell <bayard@apache.org>
Date: Tue, 13 Nov 2007 02:38:48 +0000
Subject: [PATCH] Applying Dave Meikle's patch to LANG-333; adding a
 toClass(Object[]);Class[] method to ArrayUtils

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@594396 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/commons/lang/ArrayUtils.java   | 24 ++++++++++++++++++-
 .../apache/commons/lang/ArrayUtilsTest.java   | 18 ++++++++++++++
 2 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/src/java/org/apache/commons/lang/ArrayUtils.java b/src/java/org/apache/commons/lang/ArrayUtils.java
index e7571f6ea..c9116da8a 100644
--- a/src/java/org/apache/commons/lang/ArrayUtils.java
+++ b/src/java/org/apache/commons/lang/ArrayUtils.java
@@ -4413,5 +4413,27 @@ public class ArrayUtils {
         
         return result;
     }
-    
+
+    /**
+     * <p>Converts an array of <code>Object</code> in to an Array of <code>Class</code> objects.</p>
+     *
+     * <p>This method returns <code>null</code> for a <code>null</code> input array.</p>
+     *
+     * @param array an <code>Object</code> array
+     * @return a <code>Class</code> array, <code>null</code> if null array input
+     */
+    public static Class[] toClass(Object[] array)
+    {
+        if (array == null) {
+            return null;
+        } else if (array.length == 0) {
+            return EMPTY_CLASS_ARRAY;
+        }
+        Class[] classes = new Class[array.length];
+        for (int i = 0; i < array.length; i++) {
+            classes[i] = array[i].getClass();
+        }
+        return classes;
+    }
+
 }
diff --git a/src/test/org/apache/commons/lang/ArrayUtilsTest.java b/src/test/org/apache/commons/lang/ArrayUtilsTest.java
index a7a25973b..2073761b7 100644
--- a/src/test/org/apache/commons/lang/ArrayUtilsTest.java
+++ b/src/test/org/apache/commons/lang/ArrayUtilsTest.java
@@ -2420,6 +2420,24 @@ public class ArrayUtilsTest extends TestCase {
                 new double[] { Double.MIN_VALUE, Double.MAX_VALUE, 9999999 })));
     }
 
+    public void testToClass_object() {
+        assertEquals(null, ArrayUtils.toClass(null));
+
+        assertSame(
+            ArrayUtils.EMPTY_CLASS_ARRAY,
+            ArrayUtils.toClass(new Class[0]));
+
+        Object[] array = new Object[3];
+        array[0] = new String("Test");
+        array[1] = new Integer(1);
+        array[2] = new Double(99);
+
+        Class[] results = ArrayUtils.toClass(array);
+        assertEquals("String", results[0].getSimpleName());
+        assertEquals("Integer", results[1].getSimpleName());
+        assertEquals("Double", results[2].getSimpleName());
+    }
+
     //-----------------------------------------------------------------------
     /**
      * Test for {@link ArrayUtils#isEmpty(java.lang.Object[])}.