From c3e947c273b9a9b8633699f165fbc24a9f8bb457 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=9C=B0=E5=B9=B3=E7=BA=BF?= <22250530@qq.com>
Date: Mon, 13 Jul 2015 14:17:17 +0800
Subject: [PATCH]

---
 src/com/wentch/redkale/source/DataJDBCSource.java | 15 +++++++++++++++
 src/com/wentch/redkale/source/DataSource.java     |  6 ++++++
 2 files changed, 21 insertions(+)

diff --git a/src/com/wentch/redkale/source/DataJDBCSource.java b/src/com/wentch/redkale/source/DataJDBCSource.java
index a8d76d2dd..e51a35322 100644
--- a/src/com/wentch/redkale/source/DataJDBCSource.java
+++ b/src/com/wentch/redkale/source/DataJDBCSource.java
@@ -1000,6 +1000,21 @@ public final class DataJDBCSource implements DataSource {
         return sheet.isEmpty() ? null : sheet.list().get(0);
     }
 
+    @Override
+    public <T> boolean exists(Class<T> clazz, Serializable pk) {
+        return find(clazz, pk) != null;
+    }
+
+    @Override
+    public <T> boolean exists(final Class<T> clazz, final FilterNode node) {
+        return find(clazz, node) != null;
+    }
+
+    @Override
+    public <T> boolean exists(final Class<T> clazz, final FilterBean bean) {
+        return find(clazz, bean) != null;
+    }
+
     //-----------------------list set----------------------------
     @Override
     public <T, V> Set<V> queryColumnSet(String selectedColumn, Class<T> clazz, String column, Serializable key) {
diff --git a/src/com/wentch/redkale/source/DataSource.java b/src/com/wentch/redkale/source/DataSource.java
index 3c5a427ab..2bebbcae6 100644
--- a/src/com/wentch/redkale/source/DataSource.java
+++ b/src/com/wentch/redkale/source/DataSource.java
@@ -133,6 +133,12 @@ public interface DataSource {
 
     public <T> T find(final Class<T> clazz, final FilterBean bean);
 
+    public <T> boolean exists(Class<T> clazz, Serializable pk);
+
+    public <T> boolean exists(final Class<T> clazz, final FilterNode node);
+
+    public <T> boolean exists(final Class<T> clazz, final FilterBean bean);
+
     //-----------------------list set----------------------------
     /**
      * 根据指定字段值查询对象某个字段的集合