From 25a4549ceb59148ff58329b068c4c71dc20ff269 Mon Sep 17 00:00:00 2001
From: Stephen Colebourne <scolebourne@apache.org>
Date: Tue, 21 Oct 2003 20:24:22 +0000
Subject: [PATCH] Tweak deleteWhitespace to avoid creating a new String if
 possible

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@137685 13f79535-47bb-0310-9956-ffa450edef68
---
 .../org/apache/commons/lang/StringUtils.java     | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/src/java/org/apache/commons/lang/StringUtils.java b/src/java/org/apache/commons/lang/StringUtils.java
index bc56a886f..c7fbd8fa2 100644
--- a/src/java/org/apache/commons/lang/StringUtils.java
+++ b/src/java/org/apache/commons/lang/StringUtils.java
@@ -145,7 +145,7 @@ import java.util.List;
  * @author Gary Gregory
  * @author Phil Steitz
  * @since 1.0
- * @version $Id: StringUtils.java,v 1.109 2003/09/07 14:32:34 psteitz Exp $
+ * @version $Id: StringUtils.java,v 1.110 2003/10/21 20:24:22 scolebourne Exp $
  */
 public class StringUtils {
     // Performance testing notes (JDK 1.4, Jul03, scolebourne)
@@ -2439,17 +2439,21 @@ public class StringUtils {
      * @return the String without whitespaces, <code>null</code> if null String input
      */
     public static String deleteWhitespace(String str) {
-        if (str == null) {
-            return null;
+        if (str == null || str.length() == 0) {
+            return str;
         }
         int sz = str.length();
-        StringBuffer buffer = new StringBuffer(sz);
+        char[] chs = new char[sz];
+        int count = 0;
         for (int i = 0; i < sz; i++) {
             if (!Character.isWhitespace(str.charAt(i))) {
-                buffer.append(str.charAt(i));
+                chs[count++] = str.charAt(i);
             }
         }
-        return buffer.toString();
+        if (count == sz) {
+            return str;
+        }
+        return new String(chs, 0, count);
     }
 
     // Replacing