HSQLDB example source code file (DatabaseManagerCommon.java)

This example HSQLDB source code file (DatabaseManagerCommon.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

create, customer, drop, from, from, invoice, io, jdbc, select, set, set, sql, string, string, table, table, util, where

The HSQLDB DatabaseManagerCommon.java source code

/*
 * For work developed by the HSQL Development Group:
 *
 * Copyright (c) 2001-2010, 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.
 *
 *
 *
 * For work originally developed by the Hypersonic SQL Group:
 *
 * Copyright (c) 1995-2000, The Hypersonic SQL 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 Hypersonic SQL 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 THE HYPERSONIC SQL GROUP,
 * 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.
 *
 * This software consists of voluntary contributions made by many individuals
 * on behalf of the Hypersonic SQL Group.
 */


package org.hsqldb.util;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Random;

// sqlbob@users 20020401 - patch 1.7.0 by sqlbob (RMP) - enhancements
// sqlbob@users 20020407 - patch 1.7.0 - reengineering
// nickferguson@users 20021005 - patch 1.7.1 - enhancements
// fredt@users 20021012 - patch 1.7.1 - changes to test database DDL
// weconsultants@users 20041116 - patch 1.8.0 - in 'TestHelp' added 'IF EXISTS for both DROPS.
//                                Now catching the execption that was never caught before.

/**
 * Common code in Swing and AWT versions of DatabaseManager
 *
 * New class based on Hypersonic original
 *
 * @author Thomas Mueller (Hypersonic SQL Group)
 * @author Bob Preston (sqlbob@users dot sourceforge.net)
 * @version 1.8.0
 * @since 1.7.0
 */
class DatabaseManagerCommon {

    private static Random rRandom    = new Random(100);
    static String[]       selectHelp = {
        "SELECT * FROM ",

        "SELECT [LIMIT n m] [DISTINCT] \n"
        + "{ selectExpression | table.* | * } [, ... ] \n"
        + "[INTO [CACHED|TEMP|TEXT] newTable] \n" + "FROM tableList \n"
        + "[WHERE Expression] \n"
        + "[ORDER BY selectExpression [{ASC | DESC}] [, ...] ] \n"
        + "[GROUP BY Expression [, ...] ] \n"                             //
        + "[UNION [ALL] selectStatement]"
    };
    static String[] insertHelp = {
        "INSERT INTO ",
        "INSERT INTO table [ (column [,...] ) ] \n"
        + "{ VALUES(Expression [,...]) | SelectStatement }"
    };
    static String[] updateHelp = {
        "UPDATE ",
        "UPDATE table SET column = Expression [, ...] \n"
        + "[WHERE Expression]"
    };
    static String[] deleteHelp      = {
        "DELETE FROM ", "DELETE FROM table [WHERE Expression]"
    };
    static String[] createTableHelp = {
        "CREATE TABLE ",
        "CREATE [TEMP] [CACHED|MEMORY|TEXT] TABLE name \n"
        + "( columnDefinition [, ...] ) \n\n" + "columnDefinition: \n"
        + "column DataType [ [NOT] NULL] [PRIMARY KEY] \n" + "DataType: \n"
        + "{ INTEGER | DOUBLE | VARCHAR | DATE | TIME |... }"
    };
    static String[] dropTableHelp   = {
        "DROP TABLE ", "DROP TABLE table"
    };
    static String[] createIndexHelp = {
        "CREATE INDEX ",
        "CREATE [UNIQUE] INDEX index ON \n" + "table (column [, ...])"
    };
    static String[] dropIndexHelp  = {
        "DROP INDEX ", "DROP INDEX table.index"
    };
    static String[] checkpointHelp = {
        "CHECKPOINT", "(HSQLDB SQL only)"
    };
    static String[] scriptHelp     = {
        "SCRIPT", "SCRIPT ['file']\n\n" + "(HSQLDB SQL only)"
    };
    static String[] shutdownHelp   = {
        "SHUTDOWN",
        "SHUTDOWN [COMPACT|IMMEDIATELY|SCRIPT]\n\n" + "(HSQLDB SQL only)"
    };
    static String[] setHelp = {
        "SET ",

        "SET AUTOCOMMIT { TRUE | FALSE }\n"
        + "SET DATABASE COLLATION \"<collationname>\"\n"
        + "SET CHECKPOINT DEFRAG <size>\n"
        + "SET INITIAL SCHEMA <schemaname>\n"                             //
        + "SET LOGSIZE <size>\n"                                          //
        + "SET MAXROWS maxrows\n"                                         //
        + "SET PASSWORD <password>\n"                                     //
        + "SET PROPERTY \"<propname>\" \n"
        + "SET READONLY { TRUE | FALSE }\n"
        + "SET SCHEMA <schemaname>\n"
        + "SET TABLE <tablename> READONLY { TRUE | FALSE }\n"
        + "SET TABLE <tablename> SOURCE \"\" [DESC]\n"
        + "\n\n"                                                          //
        + "(HSQLDB SQL only)"
    };
    static String[] testHelp = {
        "-->>>TEST<<<-- ;\n" + "--#1000;\n" + "DROP TABLE Test IF EXISTS;\n"
        + "CREATE TABLE Test(\n" + "  Id INTEGER PRIMARY KEY,\n"
        + "  FirstName VARCHAR(20),\n" + "  Name VARCHAR(50),\n"
        + "  ZIP INTEGER) ;\n" + "INSERT INTO Test \n"
        + "  VALUES(#,'Julia','Peterson-Clancy',#) ;\n"
        + "UPDATE Test SET Name='Hans' WHERE Id=# ;\n"
        + "SELECT * FROM Test WHERE Id=# ;\n"
        + "DELETE FROM Test WHERE Id=# ;\n" + "DROP TABLE Test IF EXISTS;",
        "This test script is parsed by the DatabaseManager\n"
        + "It may be changed manually. Rules:\n"
        + "- it must start with -->>>TEST<<<--.\n"
        + "- each line must end with ';' (no spaces after)\n"
        + "- lines starting with -- are comments\n"
        + "- lines starting with --#<count> means set new count\n"
    };
    static String[] testDataSql = {
        "SELECT * FROM Product",                                          //
        "SELECT * FROM Invoice",                                          //
        "SELECT * FROM Item",
        "SELECT * FROM Customer a INNER JOIN Invoice i ON a.ID=i.CustomerID",
        "SELECT * FROM Customer a LEFT OUTER JOIN Invoice i ON a.ID=i.CustomerID",
        "SELECT * FROM Invoice d INNER JOIN Item i ON d.ID=i.InvoiceID",
        "SELECT * FROM Customer WHERE Street LIKE '1%' ORDER BY Lastname",
        "SELECT a.id, a.firstname, a.lastname, count(i.Total) \"COUNT\", "
        + "COALESCE(sum(i.Total), 0) \"TOTAL\", COALESCE(AVG(i.Total),0) \"AVG\" FROM Customer a "
        + "LEFT OUTER JOIN Invoice i ON a.ID=i.CustomerID GROUP BY a.id, a.firstname, a.lastname"
    };

    static String random(String[] s) {
        return s[random(s.length)];
    }

    static int random(int i) {

        i = rRandom.nextInt() % i;

        return i < 0 ? -i
                     : i;
    }

    static void createTestTables(Statement sStatement) {

        String[] demo = {
            "DROP TABLE Item IF EXISTS;", "DROP TABLE Invoice IF EXISTS;",
            "DROP TABLE Product IF EXISTS;", "DROP TABLE Customer IF EXISTS;",
            "CREATE TABLE Customer(ID INTEGER PRIMARY KEY,FirstName VARCHAR(20),"
            + "LastName VARCHAR(20),Street VARCHAR(20),City VARCHAR(20));",
            "CREATE TABLE Product(ID INTEGER PRIMARY KEY,Name VARCHAR(20),"
            + "Price DECIMAL(10,2));",
            "CREATE TABLE Invoice(ID INTEGER PRIMARY KEY,CustomerID INTEGER,"
            + "Total DECIMAL(10,2), FOREIGN KEY (CustomerId) "
            + "REFERENCES Customer(ID) ON DELETE CASCADE);",
            "CREATE TABLE Item(InvoiceID INTEGER,Item INTEGER,"
            + "ProductID INTEGER,Quantity INTEGER,Cost DECIMAL(10,2),"
            + "PRIMARY KEY(InvoiceID,Item), "
            + "FOREIGN KEY (InvoiceId) REFERENCES "
            + "Invoice (ID) ON DELETE CASCADE, FOREIGN KEY (ProductId) "
            + "REFERENCES Product(ID) ON DELETE CASCADE);"
        };

        for (int i = 0; i < demo.length; i++) {

            // drop table may fail
            try {
                sStatement.execute(demo[i]);
            } catch (SQLException e) {
                ;
            }
        }
    }

    static String createTestData(Statement sStatement) throws SQLException {

        String[] name = {
            "White", "Karsen", "Smith", "Ringer", "May", "King", "Fuller",
            "Miller", "Ott", "Sommer", "Schneider", "Steel", "Peterson",
            "Heiniger", "Clancy"
        };
        String[] firstname = {
            "Mary", "James", "Anne", "George", "Sylvia", "Robert", "Janet",
            "Michael", "Andrew", "Bill", "Susanne", "Laura", "Bob", "Julia",
            "John"
        };
        String[] street = {
            "Upland Pl.", "College Av.", "- 20th Ave.", "Seventh Av."
        };
        String[] city   = {
            "New York", "Dallas", "Boston", "Chicago", "Seattle",
            "San Francisco", "Berne", "Oslo", "Paris", "Lyon", "Palo Alto",
            "Olten"
        };
        String[] product = {
            "Iron", "Ice Tea", "Clock", "Chair", "Telephone", "Shoe"
        };
        int      max     = 50;

        for (int i = 0; i < max; i++) {
            sStatement.execute("INSERT INTO Customer VALUES(" + i + ",'"
                               + random(firstname) + "','" + random(name)
                               + "','" + random(554) + " " + random(street)
                               + "','" + random(city) + "')");
            sStatement.execute("INSERT INTO Product VALUES(" + i + ",'"
                               + random(product) + " " + random(product)
                               + "'," + (20 + 2 * random(120)) + ")");
        }

        for (int i = 0; i < max; i++) {
            sStatement.execute("INSERT INTO Invoice VALUES(" + i + ","
                               + random(max) + ",0.0)");

            for (int j = random(20) + 2; j >= 0; j--) {
                sStatement.execute("INSERT INTO Item VALUES(" + i + "," + j
                                   + "," + random(max) + ","
                                   + (1 + random(24)) + ",1.5)");
            }
        }

        sStatement.execute("UPDATE Product SET Price=ROUND(Price*.1,2)");
        sStatement.execute(
            "UPDATE Item SET Cost=Cost*"
            + "(SELECT Price FROM Product prod WHERE ProductID=prod.ID)");
        sStatement.execute(
            "UPDATE Invoice SET Total=(SELECT SUM(Cost*"
            + "Quantity) FROM Item WHERE InvoiceID=Invoice.ID)");

        return ("SELECT * FROM Customer");
    }

    /**
     * Redid this file to remove sizing requirements and to make it faster
     * Speeded it up 10 fold.
     *
     * @param file
     */
    static String readFile(String file) {

        try {
            FileReader     reader = new FileReader(file);
            BufferedReader read   = new BufferedReader(reader);
            StringBuffer   b      = new StringBuffer();
            String         s      = null;
            int            count  = 0;

            while ((s = read.readLine()) != null) {
                count++;

                b.append(s);
                b.append('\n');
            }

            read.close();
            reader.close();

            return b.toString();
        } catch (IOException e) {
            return e.getMessage();
        }
    }

    static void writeFile(String file, String text) {

        try {
            FileWriter write = new FileWriter(file);

            write.write(text.toCharArray());
            write.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * @throws SQLException
     */
    static long testStatement(Statement sStatement, String sql,
                              int max) throws SQLException {

        long start = System.currentTimeMillis();

        if (sql.indexOf('#') == -1) {
            max = 1;
        }

        for (int i = 0; i < max; i++) {
            String s = sql;

            while (true) {
                int j = s.indexOf("#r#");

                if (j == -1) {
                    break;
                }

                s = s.substring(0, j) + ((int) (Math.random() * i))
                    + s.substring(j + 3);
            }

            while (true) {
                int j = s.indexOf('#');

                if (j == -1) {
                    break;
                }

                s = s.substring(0, j) + i + s.substring(j + 1);
            }

            sStatement.execute(s);
        }

        return (System.currentTimeMillis() - start);
    }

    private DatabaseManagerCommon() {}
}