/*
 *    Copyright 2010 The myBatis Team
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.spring;

import org.apache.ibatis.session.SqlSession;
import org.springframework.transaction.support.ResourceHolderSupport;
import org.springframework.util.Assert;

/**
 * 
 * @version $Id$
 */
public final class SqlSessionHolder extends ResourceHolderSupport {

    private final SqlSession sqlSession;

    public SqlSessionHolder(SqlSession sqlSession) {
        Assert.notNull(sqlSession, "SqlSession must not be null");
        this.sqlSession = sqlSession;
    }

    public SqlSession getSqlSession() {
        return sqlSession;
    }

}

/*
 *    Copyright 2010 The myBatis Team
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.mybatis.spring;

import org.apache.ibatis.session.SqlSession;
import org.springframework.transaction.support.ResourceHolderSupport;

/**
 * 
 * @version $Id$
 */
public final class SqlSessionHolder extends ResourceHolderSupport {

    private final SqlSession session;

    public SqlSessionHolder(SqlSession session) {
        assert session != null;
        this.session = session;
    }

    public SqlSession getSqlSession() {
        return session;
    }

}

--- 
+++ 
@@ -17,6 +17,7 @@
 
 import org.apache.ibatis.session.SqlSession;
 import org.springframework.transaction.support.ResourceHolderSupport;
+import org.springframework.util.Assert;
 
 /**
  * 
@@ -24,15 +25,15 @@
  */
 public final class SqlSessionHolder extends ResourceHolderSupport {
 
-    private final SqlSession session;
+    private final SqlSession sqlSession;
 
-    public SqlSessionHolder(SqlSession session) {
-        assert session != null;
-        this.session = session;
+    public SqlSessionHolder(SqlSession sqlSession) {
+        Assert.notNull(sqlSession, "SqlSession must not be null");
+        this.sqlSession = sqlSession;
     }
 
     public SqlSession getSqlSession() {
-        return session;
+        return sqlSession;
     }
 
 }
Replace 'assert session != null' with Assert.notnull(Object, String)
