支持HA

git-svn-id: http://code.alibabatech.com/svn/druid/trunk@460 b9813039-fb51-4c41-a8b9-e21c2acb5095

src/main/java/com/alibaba/druid/pool/WrapperAdapter.java

@@ -0,0 +1,38 @@
+package com.alibaba.druid.pool;
+
+import java.sql.SQLException;
+import java.sql.Wrapper;
+
+public class WrapperAdapter implements Wrapper {
+
+    public WrapperAdapter(){
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        if (iface == null) {
+            return false;
+        }
+
+        if (iface.isInstance(this)) {
+            return true;
+        }
+
+        return false;
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> T unwrap(Class<T> iface) throws SQLException {
+        if (iface == null) {
+            return null;
+        }
+
+        if (iface.isInstance(this)) {
+            return (T) this;
+        }
+
+        return null;
+    }
+
+}