java/testing/org/apache/derbyTesting/functionTests/tests/jdbc4/BlobSetMethodsTest.java

/*

   Derby - Class org.apache.derbyTesting.functionTests.tests.jdbc4.BlobSetMethodsTest

   Licensed to the Apache Software Foundation (ASF) under one
   or more contributor license agreements.  See the NOTICE file
   distributed with this work for additional information
   regarding copyright ownership.  The ASF licenses this file
   to you 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.apache.derbyTesting.functionTests.tests.jdbc4;

import java.sql.Blob;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import junit.framework.Test;
import org.apache.derbyTesting.junit.BaseJDBCTestCase;
import org.apache.derbyTesting.junit.TestConfiguration;

/**
 * tests set methods of blob
 */
public class BlobSetMethodsTest extends BaseJDBCTestCase {
    private static int BUFFER_SIZE = 1024;
    private static int UPDATE_SIZE = 100;

    public BlobSetMethodsTest (String name) {
        super (name);
    }

    protected void setUp() throws Exception {
        Connection con = getConnection();
        Statement stmt = con.createStatement();
        stmt.execute ("create table blobtest (id integer, data Blob)");
        stmt.close();
        con.close();
    }

    /**
     * Create test suite.
     */
    public static Test suite() {
        return TestConfiguration.defaultSuite (BlobSetMethodsTest.class);
    }

    /**
     * Tests large blob (more than 4k) to ensure LOBStreamControl uses file.
     */
    public void testSetBytesLargeBlob () throws SQLException {
        Connection con = getConnection();
        con.setAutoCommit (false);
        PreparedStatement pstmt = con.prepareStatement("insert into " +
                "blobtest (id, data) values (?,?)");
        Blob blob = con.createBlob();
        byte [] data = new byte [BUFFER_SIZE];
        for (int i = 0; i < BUFFER_SIZE; i++) {
            data [i] = (byte) (i % 255);
        }
     //now add more than 4k so file get in use
        for (int i = 0; i < 5; i++)
            blob.setBytes (i * BUFFER_SIZE + 1, data);
        assertEquals (BUFFER_SIZE * 5 , blob.length());
                    //update blob in the middle
        byte [] data1 = new byte [UPDATE_SIZE];
        for (int i = 0; i < UPDATE_SIZE; i++)
            data1 [i] = 120;//just any value
        blob.setBytes (BUFFER_SIZE + 1, data1);
        blob.setBytes (BUFFER_SIZE * 5 + 1, data1);
        assertEquals (5 * BUFFER_SIZE + UPDATE_SIZE, blob.length());
        //insert it into table
        pstmt.setInt (1, 3);
        pstmt.setBlob (2, blob);
        pstmt.executeUpdate ();
        Statement stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery("select data from blobtest where " +
                                "id = 3");
        assertEquals(true, rs.next());
        blob = rs.getBlob (1);
        byte [] data2 = blob.getBytes (BUFFER_SIZE + 1, UPDATE_SIZE);
        assertEquals (5 * BUFFER_SIZE + UPDATE_SIZE, blob.length());
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);
        data2 = blob.getBytes (5 * BUFFER_SIZE + 1, UPDATE_SIZE);
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);
        //test truncate
        blob.truncate (BUFFER_SIZE);
        assertEquals ("truncate failed", BUFFER_SIZE, blob.length());
        rs.close();
        con.commit();
        stmt.close();
        pstmt.close();
    }

    /**
     * tests set bytes method of blob in memory only mode (less than 4k)
     */
    public void testSetBytesSmallBlob () throws SQLException {
        Connection con = getConnection();
        con.setAutoCommit (false);
        PreparedStatement pstmt = con.prepareStatement("insert into " +
                "blobtest (id, data) values (?,?)");
        pstmt.setInt (1,1);
        Blob blob = con.createBlob();
        //add 1024 bytes
        byte [] data = new byte [BUFFER_SIZE];
        for (int i = 0; i < BUFFER_SIZE; i++) {
            data [i] = (byte) (i % 255);
        }
        blob.setBytes (1, data);
        assertEquals (BUFFER_SIZE, blob.length());
        pstmt.setBlob (2, blob);
        pstmt.executeUpdate();
        Statement stmt = con.createStatement();
        ResultSet rs = stmt.executeQuery(
                "select data from blobtest where id = 1");
        assertEquals(true, rs.next());
        blob = rs.getBlob (1);
        assertEquals (BUFFER_SIZE, blob.length());
        //update blob in the middle
        byte [] data1 = new byte [UPDATE_SIZE];
        for (int i = 0; i < UPDATE_SIZE; i++)
            data1 [i] = 120;//just any value
        blob.setBytes (UPDATE_SIZE, data1);
        byte [] data2 = blob.getBytes (100, UPDATE_SIZE);
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);
        //update it at the end
        blob.setBytes (BUFFER_SIZE + 1, data1);
        assertEquals (BUFFER_SIZE + UPDATE_SIZE, blob.length());
        data2 = blob.getBytes (BUFFER_SIZE + 1, UPDATE_SIZE);
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);
        //insert the blob and test again
        pstmt.setInt (1, 2);
        pstmt.setBlob (2, blob);
        pstmt.executeUpdate();
        rs = stmt.executeQuery("select data from blobtest where " +
                "id = 2");
        assertEquals(true, rs.next());
        blob = rs.getBlob (1);
        assertEquals (BUFFER_SIZE + UPDATE_SIZE, blob.length());
        data2 = blob.getBytes (100, UPDATE_SIZE);
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);
        data2 = blob.getBytes (BUFFER_SIZE + 1, UPDATE_SIZE);
        for (int i = 0; i < UPDATE_SIZE; i++)
            assertEquals (data1 [i], data2 [i]);

        //test truncate on small size blob
        blob = con.createBlob();
        data = new byte [100];
        for (int i = 0; i < 100; i++) {
            data [i] = (byte) i;
        }
        blob.setBytes (1, data);
        assertEquals (blob.length(), 100);
        blob.truncate (50);
        assertEquals (blob.length(), 50);
        blob.setBytes (1, data);
        assertEquals ("set failed", blob.length(), 100);
        blob.truncate (50);
        assertEquals ("truncation failed", blob.length(), 50);
        rs.close();
        con.commit();
        stmt.close();
        pstmt.close();
    }

    protected void tearDown() throws Exception {
        Connection con = getConnection();
        con.setAutoCommit (true);
        Statement stmt = con.createStatement();
        stmt.execute ("drop table blobtest");
        stmt.close();
        super.tearDown();
    }
}