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 oracle.jdbc.OracleConnection;
import oracle.jdbc.internal.OraclePreparedStatement;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.PreparedStatementHolder;
import com.alibaba.druid.test.util.OracleMockDriver;
import com.alibaba.druid.util.JdbcUtils;

public class TestOraclePrefetch 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");
    }

    protected void tearDown() throws Exception {
        JdbcUtils.close(dataSource);
    }

    public void test_oracle() throws Exception {

        String sql = "SELECT 1";

        OracleConnection oracleConn;
        OraclePreparedStatement oracleStmt;
        PreparedStatementHolder stmtHolder;
        {
            Connection conn = dataSource.getConnection();

            {
                oracleConn = conn.unwrap(OracleConnection.class);
                Assert.assertEquals(50, oracleConn.getDefaultRowPrefetch());
            }

            PreparedStatement stmt = conn.prepareStatement(sql);

            oracleStmt = stmt.unwrap(OraclePreparedStatement.class);
            Assert.assertEquals(50, oracleStmt.getRowPrefetch());
            
            stmtHolder = stmt.unwrap(PreparedStatementHolder.class);
            Assert.assertNotNull(stmtHolder);
            Assert.assertEquals(0, stmtHolder.getHitCount());

            ResultSet rs = stmt.executeQuery();
            rs.next();

            rs.close();
            stmt.close();
            conn.close();
        }

        {
            Connection conn = dataSource.getConnection();

            {
                OracleConnection oracleConn2 = conn.unwrap(OracleConnection.class);
                Assert.assertEquals(50, oracleConn2.getDefaultRowPrefetch());
                Assert.assertSame(oracleConn, oracleConn2);
            }

            PreparedStatement stmt = conn.prepareStatement(sql);
            
            {
                PreparedStatementHolder stmtHolder2 = stmt.unwrap(PreparedStatementHolder.class);
                Assert.assertSame(stmtHolder2, stmtHolder);
                Assert.assertEquals(1, stmtHolder.getHitCount());
            }

            ResultSet rs = stmt.executeQuery();
            rs.next();
            rs.close();
            stmt.close();
            {
                OraclePreparedStatement oracleStmt2 = stmt.unwrap(OraclePreparedStatement.class);
                Assert.assertSame(oracleStmt, oracleStmt2);
                Assert.assertEquals(2, oracleStmt.getRowPrefetch());
            }

            conn.close();
        }

    }
}