From 1da62db6ab2a2f7b1b87dda11782e0f293119beb Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=9C=B0=E5=B9=B3=E7=BA=BF?= <22250530@qq.com>
Date: Tue, 15 Sep 2015 15:27:43 +0800
Subject: [PATCH]

---
 src/com/wentch/redkale/source/Flipper.java | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/com/wentch/redkale/source/Flipper.java b/src/com/wentch/redkale/source/Flipper.java
index cb193cf95..1e34daa90 100644
--- a/src/com/wentch/redkale/source/Flipper.java
+++ b/src/com/wentch/redkale/source/Flipper.java
@@ -52,7 +52,7 @@ public final class Flipper implements Serializable {
         this.size = copy.size;
         this.sort = copy.sort;
     }
-    
+
     public Flipper next() {
         this.page++;
         return this;
@@ -91,10 +91,11 @@ public final class Flipper implements Serializable {
         return sort;
     }
 
-    public void putSortIfEmpty(String sort) {
+    public Flipper putSortIfEmpty(String sort) {
         if (this.sort == null || this.sort.isEmpty()) {
             this.sort = sort;
         }
+        return this;
     }
 
     public void setSort(String sort) {