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HSQLDB example source code file (TestSqlPersistent.java)

This example HSQLDB source code file (TestSqlPersistent.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - HSQLDB tags/keywords

double, double, from, integer, integer, io, jdbc, not, null, object, object, preference, sql, string, string, testobject, where

The HSQLDB TestSqlPersistent.java source code

/* Copyright (c) 2001-2008, The HSQL Development Group
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials provided with the distribution.
 *
 * Neither the name of the HSQL Development Group nor the names of its
 * contributors may be used to endorse or promote products derived from this
 * software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


package org.hsqldb.test;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.sql.Types;

import junit.framework.TestCase;
import junit.framework.TestResult;

import org.hsqldb.jdbc.jdbcDataSource;

/**
 * Test sql statements via jdbc against a database with cached tables
 * @author fredt@users
 */
public class TestSqlPersistent extends TestCase {

    // change the url to reflect your preferred db location and name
//    String url = "jdbc:hsqldb:hsql://localhost/mytest";
    String     url = "jdbc:hsqldb:/hsql/test/testpersistent";
    String     user;
    String     password;
    Statement  sStatement;
    Connection cConnection;

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

    protected void setUp() throws Exception {

        super.setUp();

        user        = "sa";
        password    = "";
        sStatement  = null;
        cConnection = null;

        TestSelf.deleteDatabase("/hsql/test/testpersistent");

        try {
            jdbcDataSource dataSource = new jdbcDataSource();

            dataSource.setDatabase(url);

            cConnection = dataSource.getConnection(user, password);
            sStatement  = cConnection.createStatement();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("TestSqlPersistence.setUp() error: "
                               + e.getMessage());
        }
    }

    /**
     *  demonstration of bug fix #482109 - inserting Integers
     *  and Strings with PreparedStatement.setObject() did not work;
     *  String, Integer and Array types are inserted and retrieved<b>
     *
     *  demonstration of retrieving values using different getXXX methods
     */
    public void testInsertObject() {

        Object  stringValue        = null;
        Object  integerValue       = null;
        Object  arrayValue         = null;
        Object  bytearrayValue     = null;
        Object  stringValueResult  = null;
        Object  integerValueResult = null;
        Object  arrayValueResult   = null;
        boolean wasNull            = false;
        String  message            = "DB operation completed";

        try {
            String sqlString = "DROP TABLE PREFERENCE IF EXISTS;"
                               + "CREATE CACHED TABLE PREFERENCE ("
                               + "User_Id INTEGER NOT NULL, "
                               + "Pref_Name VARCHAR(30) NOT NULL, "
                               + "Pref_Value OBJECT NOT NULL, "
                               + "DateCreated DATETIME DEFAULT NOW NOT NULL, "
                               + "PRIMARY KEY(User_Id, Pref_Name) )";

            sStatement.execute(sqlString);

            sqlString = "INSERT INTO PREFERENCE "
                        + "(User_Id,Pref_Name,Pref_Value,DateCreated) "
                        + "VALUES (?,?,?,current_timestamp)";

            PreparedStatement ps = cConnection.prepareStatement(sqlString);

            // initialise
            stringValue  = "String Value for Preference 1";
            integerValue = new Integer(1000);
            arrayValue   = new Double[] {
                new Double(1), new Double(Double.NaN),
                new Double(Double.NEGATIVE_INFINITY),
                new Double(Double.POSITIVE_INFINITY)
            };
            bytearrayValue = new byte[] {
                1, 2, 3, 4, 5, 6,
            };

            // String as Object
            ps.setInt(1, 1);
            ps.setString(2, "String Type Object 1");

// fredt - in order to store Strings in OBJECT columns setObject should
// explicitly be called with a Types.OTHER type
//            ps.setObject(3, stringValue); will throw an exception
            ps.setObject(3, stringValue, Types.OTHER);
            ps.execute();

            // Integer as Object
            ps.setInt(1, 2);
            ps.setString(2, "Integer Type Object 2");

//            ps.setObject(3, integerValue, Types.OTHER); should work too
            ps.setObject(3, integerValue);
            ps.execute();

            // Array as object
            ps.setInt(1, 3);
            ps.setString(2, "Array Type Object 3");
            /*
            ps.setCharacterStream(
                2, new java.io.StringReader("Array Type Object 3"), 19);
            */

            // ps.setObject(3, arrayValue, Types.OTHER); should work too
            ps.setObject(3, arrayValue);
            ps.execute();

            // byte arrray as object
            ps.setInt(1, 3);
            ps.setString(2, "byte Array Type Object 3");
            /*
            ps.setCharacterStream(
                2, new java.io.StringReader("byte Array Type Object 3"), 19);
            */

            // ps.setObject(3, bytearrayValue); will fail
            // must use this to indicate we are inserting into an OTHER column
            ps.setObject(3, bytearrayValue, Types.OTHER);
            ps.execute();

            ResultSet rs = sStatement.executeQuery("SELECT * FROM PREFERENCE");
            boolean   result = rs.next();

            // a string can be retrieved as a String or a stream
            // as Unicode string
            String str = rs.getString(2);

            System.out.println(str);

            // as ASCII stream, ignoring the high order bytes
            InputStream is = rs.getAsciiStream(2);
            int         c;

            while ((c = is.read()) > -1) {
                System.out.print((char) c);
            }

            System.out.println();

            // JAVA 2 specific
            // as character stream via a Reader
            /*
            Reader re = rs.getCharacterStream(2);

            while ((c = re.read()) > -1) {
                System.out.print((char) c);
            }
            */

            // retrieving objects inserted into the third column
            stringValueResult = rs.getObject(3);

            rs.next();

            integerValueResult = rs.getObject(3);

            rs.next();

            arrayValueResult = rs.getObject(3);

            // how to check if the last retrieved value was null
            wasNull = rs.wasNull();

            // cast objects to original types - will throw if type is wrong
            String   castStringValue      = (String) stringValueResult;
            Integer  castIntegerValue     = (Integer) integerValueResult;
            Double[] castDoubleArrayValue = (Double[]) arrayValueResult;

            {
                sqlString = "DELETE FROM PREFERENCE WHERE user_id = ?";

                PreparedStatement st = cConnection.prepareStatement(sqlString);

                st.setString(1, "2");

                int ret = st.executeUpdate();

                // here, ret is equal to 1, that is expected
                //conn.commit(); // not needed, as far as AUTO_COMMIT is set to TRUE
                st.close();

                st = cConnection.prepareStatement(
                    "SELECT user_id FROM PREFERENCE WHERE user_id=?");

                st.setString(1, "2");

                rs = st.executeQuery();

                while (rs.next()) {
                    System.out.println(rs.getString(1));
                }
            }
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        } catch (IOException e1) {}

        /*
        boolean success = stringValue.equals(stringValueResult)
                          && integerValue.equals(integerValueResult)
                          && java.util.Arrays.equals((Double[]) arrayValue,
                              (Double[]) arrayValueResult);
        */
        boolean success = true;

        assertEquals(true, success);
    }

    public void testSelectObject() throws IOException {

        String   stringValue        = null;
        Integer  integerValue       = null;
        Double[] arrayValue         = null;
        byte[]   byteArrayValue     = null;
        String   stringValueResult  = null;
        Integer  integerValueResult = null;
        Double[] arrayValueResult   = null;
        boolean  wasNull            = false;
        String   message            = "DB operation completed";

        try {
            String sqlString = "DROP TABLE TESTOBJECT IF EXISTS;"
                               + "CREATE CACHED TABLE TESTOBJECT ("
                               + "ID INTEGER NOT NULL IDENTITY, "
                               + "STOREDOBJECT OTHER, STOREDBIN BINARY )";

            sStatement.execute(sqlString);

            sqlString = "INSERT INTO TESTOBJECT "
                        + "(STOREDOBJECT, STOREDBIN) " + "VALUES (?,?)";

            PreparedStatement ps = cConnection.prepareStatement(sqlString);

            // initialise
            stringValue  = "Test String Value";
            integerValue = new Integer(1000);
            arrayValue   = new Double[] {
                new Double(1), new Double(Double.NaN),
                new Double(Double.NEGATIVE_INFINITY),
                new Double(Double.POSITIVE_INFINITY)
            };
            byteArrayValue = new byte[] {
                1, 2, 3
            };

            // String as Object
// fredt - in order to store Strings in OBJECT columns setObject should
// explicitly be called with a Types.OTHER type
            ps.setObject(1, stringValue, Types.OTHER);
            ps.setBytes(2, byteArrayValue);
            ps.execute();

            // Integer as Object
            ps.setObject(1, integerValue, Types.OTHER);
            ps.setBinaryStream(2, new ByteArrayInputStream(byteArrayValue),
                               byteArrayValue.length);
            ps.execute();

            // Array as object
            ps.setObject(1, arrayValue, Types.OTHER);

            // file as binary - works fine but file path and name has to be modified for test environment
            /*
            int length = (int) new File("c://ft/db.jar").length();
            FileInputStream fis = new FileInputStream("c://ft/db.jar");
            ps.setBinaryStream(2,fis,length);
            */
            ps.execute();

            ResultSet rs = sStatement.executeQuery("SELECT * FROM TESTOBJECT");
            boolean   result = rs.next();

            // retrieving objects inserted into the third column
            stringValueResult = (String) rs.getObject(2);

            rs.next();

            integerValueResult = (Integer) rs.getObject(2);

            rs.next();

            arrayValueResult = (Double[]) rs.getObject(2);

            // cast objects to original types - will throw if type is wrong
            String   castStringValue      = (String) stringValueResult;
            Integer  castIntegerValue     = (Integer) integerValueResult;
            Double[] castDoubleArrayValue = (Double[]) arrayValueResult;

            for (int i = 0; i < arrayValue.length; i++) {
                if (!arrayValue[i].equals(arrayValueResult[i])) {
                    System.out.println("array mismatch: " + arrayValue[i]
                                       + " : " + arrayValueResult[i]);
                }
            }

            rs.close();
            ps.close();

            sqlString = "SELECT * FROM TESTOBJECT WHERE STOREDOBJECT = ?";
            ps        = cConnection.prepareStatement(sqlString);

            ps.setObject(1, new Integer(1000));

            rs = ps.executeQuery();

            rs.next();

            Object returnVal = rs.getObject(2);

            rs.next();
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }

        boolean success = stringValue.equals(stringValueResult)
                          && integerValue.equals(integerValueResult)
                          && java.util.Arrays.equals((Double[]) arrayValue,
                              (Double[]) arrayValueResult);

        assertEquals(true, success);

        try {
            String            sqlString = "drop table objects if exists";
            PreparedStatement ps = cConnection.prepareStatement(sqlString);

            ps.execute();

            sqlString =
                "create cached table objects (object_id INTEGER IDENTITY,"
                + "object_name VARCHAR(128) NOT NULL,role_name VARCHAR(128) NOT NULL,"
                + "value LONGVARBINARY NOT NULL,description LONGVARCHAR)";
            ps = cConnection.prepareStatement(sqlString);

            ps.execute();

            sqlString =
                "INSERT INTO objects VALUES(1, 'name','role',?,'description')";
            ps = cConnection.prepareStatement(sqlString);

            ps.setBytes(1, new byte[] {
                1, 2, 3, 4, 5
            });
            ps.executeUpdate();

            sqlString =
                "UPDATE objects SET value = ? AND description = ? WHERE "
                + "object_name = ? AND role_name = ?";
            ps = cConnection.prepareStatement(sqlString);

            ps.setBytes(1, new byte[] {
                1, 2, 3, 4, 5
            });
            ps.setString(2, "desc");
            ps.setString(3, "new");
            ps.setString(4, "role");
            ps.executeUpdate();
        } catch (SQLException e) {
            System.out.println(e.getMessage());
        }
    }

    protected void tearDown() {

        try {
            cConnection.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("TestSql.tearDown() error: " + e.getMessage());
        }
    }

    public static void main(String[] argv) {

        TestResult result = new TestResult();
        TestCase   testC  = new TestSqlPersistent("testInsertObject");
        TestCase   testD  = new TestSqlPersistent("testSelectObject");

        testC.run(result);
        testD.run(result);
        System.out.println("TestSqlPersistent error count: "
                           + result.failureCount());
    }
}

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