Druid/src/test/java/com/alibaba/druid/bvt/proxy/ClobTest.java

package com.alibaba.druid.bvt.proxy;

import java.io.StringReader;
import java.sql.Clob;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import junit.framework.Assert;
import junit.framework.TestCase;

import com.alibaba.druid.proxy.jdbc.ClobProxy;
import com.alibaba.druid.util.JdbcUtils;

public class ClobTest extends TestCase {
	private static String create_url = "jdbc:wrap-jdbc:filters=default,commonLogging,log4j:name=clobTest:jdbc:derby:memory:clobTestDB;create=true";

	protected void setUp() throws Exception {
		Class.forName("com.alibaba.druid.proxy.DruidDriver");

		Connection conn = DriverManager.getConnection(create_url);

		createTable();

		conn.close();
	}

	private void createTable() throws SQLException {
		Connection conn = DriverManager.getConnection(create_url);
		Statement stmt = conn.createStatement();
		stmt.execute("CREATE TABLE T_CLOB (ID INTEGER, DATA CLOB)");
		stmt.close();
		conn.close();
	}

	private void dropTable() throws SQLException {
		Connection conn = DriverManager.getConnection(create_url);
		Statement stmt = conn.createStatement();
		stmt.execute("DROP TABLE T_CLOB");
		stmt.close();
		conn.close();
	}

	protected void tearDown() throws Exception {
		dropTable();
	}

	public void test_clob() throws Exception {

		Connection conn = null;
		PreparedStatement pstmt = null;
		Statement stmt = null;
		ResultSet rs = null;

		try {
			conn = DriverManager.getConnection(create_url);

			pstmt = conn.prepareStatement("INSERT INTO T_CLOB (ID, DATA) VALUES (?, ?)");
			
			Clob clob = conn.createClob();
			
			ClobProxy clobWrapper = (ClobProxy) clob;
			Assert.assertNotNull(clobWrapper.getConnectionWrapper());
			clob.setAsciiStream(1);
			clob.setCharacterStream(1);
			
			clob.setString(1, "ABCAAAAAAAAAAA");
			clob.setString(1, "ABCAAAAAAAAAAA", 1, 5);

			pstmt.setInt(1, 1);
			pstmt.setClob(2, clob);
			int updateCount = pstmt.executeUpdate();
			Assert.assertEquals(1, updateCount);
			
			pstmt.setInt(1, 1);
			pstmt.setClob(2, new StringReader("XXXXXXX"));
			updateCount = pstmt.executeUpdate();
			Assert.assertEquals(1, updateCount);
			
			pstmt.setInt(1, 1);
			pstmt.setClob(2, new StringReader("ABCAAAAAAAAAAABCAAAAAAAAAAAAABCAAAAAAAAAAABCAAAAAAAAAAAA"), "ABCAAAAAAAAAAABCAAAAAAAAAAAAABCAAAAAAAAAAABCAAAAAAAAAAAA".length());
			updateCount = pstmt.executeUpdate();
			Assert.assertEquals(1, updateCount);
			
			stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_UPDATABLE, ResultSet.CLOSE_CURSORS_AT_COMMIT);
			
			////////
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			rs.getStatement(); // just call
			while (rs.next()) {
				Clob readClob = rs.getClob(2);
				readClob.length();
				readClob.position("abc", 1);
				readClob.getCharacterStream().close();
				readClob.getAsciiStream().close();
				readClob.getCharacterStream(1, 1).close();
				readClob.getSubString(1, 2);
				readClob.truncate(2);
				readClob.free();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.getCharacterStream(2).close();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.getCharacterStream("DATA").close();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				Clob searchstr = conn.createClob();
				searchstr.setString(1, "AB");
				Clob x = rs.getClob("DATA");
				x.position(searchstr, 1);
				x.free();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.getAsciiStream(2).close();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.getAsciiStream("DATA").close();
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				Clob x = conn.createClob();
				x.setString(1, "XXSDDSLF");
				rs.updateClob(2, x);
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				Clob x = conn.createClob();
				x.setString(1, "XXSDDSLF");
				rs.updateClob("DATA", x);
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.updateClob(2, new StringReader("XDSFLA"));
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.updateClob("DATA", new StringReader("XDSFLA"));
			}
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.updateClob(2, new StringReader("XDSFLA"), "XDSFLA".length());
			}
			JdbcUtils.close(rs);
			
			rs = stmt.executeQuery("SELECT ID, DATA FROM T_CLOB");
			while (rs.next()) {
				rs.updateClob("DATA", new StringReader("XDSFLA"), "XDSFLA".length());
			}
			JdbcUtils.close(rs);
		} finally {
			JdbcUtils.close(rs);
			JdbcUtils.close(stmt);
			JdbcUtils.close(pstmt);
			JdbcUtils.close(conn);
		}
	}
	

	
}