improve java.sql.Wrapper support

src/test/java/com/alibaba/druid/bvt/pool/TestOracleWrap.java

@@ -0,0 +1,115 @@
+/*
+ * Copyright 1999-2011 Alibaba Group Holding Ltd.
+ *
+ * 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 com.alibaba.druid.bvt.pool;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import com.alibaba.druid.pool.DruidDataSource;
+import com.alibaba.druid.pool.DruidPooledConnection;
+import com.alibaba.druid.pool.DruidPooledPreparedStatement;
+import com.alibaba.druid.pool.DruidPooledResultSet;
+import com.alibaba.druid.test.util.OracleMockDriver;
+import com.alibaba.druid.util.JdbcUtils;
+
+public class TestOracleWrap extends TestCase {
+
+    private DruidDataSource dataSource;
+
+    protected void setUp() throws Exception {
+        dataSource = new DruidDataSource();
+
+        dataSource.setOracle(true);
+        dataSource.setUrl("jdbc:mock:xxx");
+        dataSource.setDriver(new OracleMockDriver());
+        dataSource.setPoolPreparedStatements(true);
+        dataSource.setConnectionProperties("defaultRowPrefetch=50");
+        dataSource.setDbType("oracle");
+        // dataSource.setFilters("log4j");
+    }
+
+    protected void tearDown() throws Exception {
+        JdbcUtils.close(dataSource);
+    }
+
+    public void test_oracle() throws Exception {
+
+        String sql = "SELECT 1";
+
+        {
+            Connection conn = dataSource.getConnection();
+
+            Assert.assertTrue(conn.isWrapperFor(DruidPooledConnection.class));
+            Assert.assertNotNull(conn.unwrap(DruidPooledConnection.class));
+
+            Assert.assertTrue(conn.isWrapperFor(oracle.jdbc.OracleConnection.class));
+            Assert.assertNotNull(conn.unwrap(oracle.jdbc.OracleConnection.class));
+            
+            Assert.assertTrue(conn.isWrapperFor(java.sql.Connection.class));
+            Assert.assertNotNull(conn.unwrap(java.sql.Connection.class));
+
+            // /////////////
+
+            PreparedStatement stmt = conn.prepareStatement(sql);
+
+            Assert.assertNotNull(stmt.unwrap(oracle.jdbc.OraclePreparedStatement.class));
+            Assert.assertTrue(stmt.isWrapperFor(oracle.jdbc.OraclePreparedStatement.class));
+
+            Assert.assertTrue(stmt.isWrapperFor(DruidPooledPreparedStatement.class));
+            Assert.assertNotNull(stmt.unwrap(DruidPooledPreparedStatement.class));
+            
+            Assert.assertTrue(stmt.isWrapperFor(java.sql.PreparedStatement.class));
+            Assert.assertNotNull(stmt.unwrap(java.sql.PreparedStatement.class));
+
+            ResultSet rs = stmt.executeQuery();
+
+            Assert.assertNotNull(rs.unwrap(oracle.jdbc.OracleResultSet.class));
+            Assert.assertTrue(rs.isWrapperFor(oracle.jdbc.OracleResultSet.class));
+            
+            Assert.assertTrue(rs.isWrapperFor(DruidPooledResultSet.class));
+            Assert.assertNotNull(rs.unwrap(DruidPooledResultSet.class));
+            
+            Assert.assertTrue(rs.isWrapperFor(java.sql.ResultSet.class));
+            Assert.assertNotNull(rs.unwrap(java.sql.ResultSet.class));
+
+            rs.next();
+
+            rs.close();
+            stmt.close();
+            conn.close();
+        }
+
+        for (int i = 0; i < 10; ++i) {
+            Connection conn = dataSource.getConnection();
+
+            PreparedStatement stmt = conn.prepareStatement(sql);
+
+            ResultSet rs = stmt.executeQuery();
+            rs.next();
+            rs.close();
+            stmt.close();
+
+            conn.close();
+        }
+
+        Assert.assertEquals(1, dataSource.getCachedPreparedStatementCount());
+
+    }
+}