ArrayUtil - remove unused method

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1876205 13f79535-47bb-0310-9956-ffa450edef68

src/java/org/apache/poi/util/ArrayUtil.java

@@ -20,35 +20,13 @@ package org.apache.poi.util;
 
 /**
  * Utility classes for dealing with arrays.
- *
- * @author Glen Stampoultzis
  */
-public class ArrayUtil
+@Internal
-{
+public final class ArrayUtil {
-    /**
-     * This is really a debugging version of <code>System.arraycopy()</code>.
-     * Use it to provide better exception messages when copying arrays around.
-     * For production use it's better to use the original for speed.
-     */
-    public static void arraycopy(byte[] src, int src_position, byte[] dst, int dst_position, int length)
-    {
-        if (src_position < 0)
-            throw new IllegalArgumentException("src_position was less than 0.  Actual value " + src_position);
-        if (src_position >= src.length)
-            throw new IllegalArgumentException( "src_position was greater than src array size.  Tried to write starting at position " + src_position + " but the array length is " + src.length );
-        if (src_position + length > src.length)
-            throw new IllegalArgumentException("src_position + length would overrun the src array.  Expected end at " + (src_position + length) + " actual end at " + src.length);
-        if (dst_position < 0)
-            throw new IllegalArgumentException("dst_position was less than 0.  Actual value " + dst_position);
-        if (dst_position >= dst.length)
-            throw new IllegalArgumentException( "dst_position was greater than dst array size.  Tried to write starting at position " + dst_position + " but the array length is " + dst.length );
-        if (dst_position + length > dst.length)
-            throw new IllegalArgumentException("dst_position + length would overrun the dst array.  Expected end at " + (dst_position + length) + " actual end at " + dst.length);
 
-        System.arraycopy( src, src_position, dst, dst_position, length);
+	private ArrayUtil() {}
-    }
 
-    /**
+	/**
      * Moves a number of entries in an array to another point in the array,
      *  shifting those inbetween as required.
      * @param array The array to alter
@@ -60,7 +38,7 @@ public class ArrayUtil
     	// If we're not asked to do anything, return now
     	if(numToMove <= 0) { return; }
     	if(moveFrom == moveTo) { return; }
-    	
+
     	// Check that the values supplied are valid
     	if(moveFrom < 0 || moveFrom >= array.length) {
     		throw new IllegalArgumentException("The moveFrom must be a valid array index");
@@ -74,11 +52,11 @@ public class ArrayUtil
     	if(moveTo+numToMove > array.length) {
     		throw new IllegalArgumentException("Asked to move to a position that doesn't have enough space");
     	}
-    	
+
-    	// Grab the bit to move 
+    	// Grab the bit to move
     	Object[] toMove = new Object[numToMove];
     	System.arraycopy(array, moveFrom, toMove, 0, numToMove);
-    	
+
     	// Grab the bit to be shifted
     	Object[] toShift;
     	int shiftTo;
@@ -95,14 +73,14 @@ public class ArrayUtil
     		System.arraycopy(array, moveFrom+numToMove, toShift, 0, toShift.length);
     		shiftTo = moveFrom;
     	}
-    	
+
     	// Copy the moved block to its new location
     	System.arraycopy(toMove, 0, array, moveTo, toMove.length);
-    	
+
     	// And copy the shifted block to the shifted location
     	System.arraycopy(toShift, 0, array, shiftTo, toShift.length);
-    	
+
-    	
+
     	// We're done - array will now have everything moved as required
     }
 

src/testcases/org/apache/poi/util/TestArrayUtil.java

@@ -29,22 +29,6 @@ import org.junit.Test;
  * Unit test for ArrayUtil
  */
 public class TestArrayUtil {
-	/**
-	 * Test to ensure that our own arraycopy behaves as it should do
-	 */
-	@Test
-	public void testarraycopy() {
-		byte[] bytes = new byte[] { 0x01, 0x02, 0x03, 0x04 };
-
-		// Test copy whole thing
-		byte[] dest = new byte[4];
-		ArrayUtil.arraycopy(bytes, 0, dest, 0, 4);
-
-		assertArrayEquals(dest, bytes);
-		// ToDo - test exceptions are as expected
-	}
-
-
 	/**
 	 * Helper for testArrayMoveWithin
 	 */