Main.java Source code

Introduction

Here is the source code for Main.java

Source

/*
JDBC Recipes: A Problem-Solution Approach (Problem-Solution Approach) (Hardcover)
by Mahmoud Parsian 
    
    
# Publisher: Apress (September 15, 2005)
# Language: English
# ISBN: 1590595203
    
*/

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;

import javax.sql.RowSet;
import javax.sql.rowset.FilteredRowSet;
import javax.sql.rowset.Predicate;

import com.sun.rowset.FilteredRowSetImpl;

public class Main {
    public static void main(String[] args) throws Exception {
        Connection conn = getHSQLConnection();
        System.out.println("Got Connection.");
        Statement st = conn.createStatement();
        st.executeUpdate("create table survey (id int,name varchar, age int);");
        st.executeUpdate("insert into survey (id,name,age ) values (1,'nameValue', 10)");
        st.executeUpdate("insert into survey (id,name,age ) values (2,'anotherValue', 100)");

        FilteredRowSet frs = new FilteredRowSetImpl();
        frs.setUsername("sa");
        frs.setPassword("");
        frs.setUrl("jdbc:hsqldb:data/tutorial");
        frs.setCommand("SELECT id, name, age FROM survey");
        frs.execute();

        System.out.println("--- Unfiltered RowSet: ---");
        while (frs.next()) {
            System.out.println(frs.getRow() + " - " + frs.getString("id") + ":" + frs.getString("name") + ":"
                    + frs.getInt("age"));
        }
        // create a filter that restricts entries in
        // the age column to be between 7 and 10
        AgeFilter filter = new AgeFilter(7, 10, 3);

        // set the filter.
        frs.beforeFirst();
        frs.setFilter(filter);

        // go to the beginning of the Rowset
        System.out.println("--- Filtered RowSet: ---");

        // show filtered data
        while (frs.next()) {
            System.out.println(frs.getRow() + " - " + frs.getString("id") + ":" + frs.getString("name") + ":"
                    + frs.getInt("age"));
        }

        System.out.println("--- Try to insert new records ---");

        // Try to add an employee with age = 90 (allowed by filter)
        frs.moveToInsertRow();
        frs.updateString(1, "999");
        frs.updateString(2, "Andre");
        frs.updateInt(3, 90);
        frs.insertRow();
        frs.moveToCurrentRow();
        frs.acceptChanges();

        // try to add an survey with age = 65 (not allowed by filter)
        frs.moveToInsertRow();
        frs.updateString(1, "123");
        frs.updateString(2, "Jeff");
        frs.updateInt(3, 65);
        frs.insertRow();
        frs.moveToCurrentRow();
        frs.acceptChanges();

        // scroll to first row of rowset
        frs.beforeFirst();
        // display rows in FilteredRowset
        System.out.println("FilteredRowSet after trying to insert Jeff (age 65) and Andre (age 90):");
        while (frs.next()) {
            System.out.println(frs.getRow() + " - " + frs.getString("id") + ":" + frs.getString("name") + ":"
                    + frs.getInt("age"));
        }

        frs.close();
        st.close();
        frs.close();
    }

    private static Connection getHSQLConnection() throws Exception {
        Class.forName("org.hsqldb.jdbcDriver");
        System.out.println("Driver Loaded.");
        String url = "jdbc:hsqldb:data/tutorial";
        return DriverManager.getConnection(url, "sa", "");
    }

    public static Connection getMySqlConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/demo2s";
        String username = "oost";
        String password = "oost";

        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static Connection getOracleConnection() throws Exception {
        String driver = "oracle.jdbc.driver.OracleDriver";
        String url = "jdbc:oracle:thin:@localhost:1521:databaseName";
        String username = "userName";
        String password = "password";

        Class.forName(driver); // load Oracle driver
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }
}

class AgeFilter implements Predicate {
    private int lowAge;

    private int highAge;

    private int columnIndex;

    private String columnName;

    public AgeFilter(int lowAge, int highAge, int columnIndex, String columnName) {
        this.lowAge = lowAge;
        this.highAge = highAge;
        this.columnName = columnName;
        this.columnIndex = columnIndex;
    }

    public AgeFilter(int lowAge, int highAge, int columnIndex) {
        this(lowAge, highAge, columnIndex, "age");
    }

    public boolean evaluate(Object value, String columnName) {
        boolean evaluation = true;
        if (columnName.equalsIgnoreCase(this.columnName)) {
            int columnValue = ((Integer) value).intValue();
            if ((columnValue >= this.lowAge) && (columnValue <= this.highAge)) {
                evaluation = true;
            } else {
                evaluation = false;
            }
        }
        return evaluation;
    }

    public boolean evaluate(Object value, int columnNumber) {
        boolean evaluation = true;
        if (columnIndex == columnNumber) {
            int columnValue = ((Integer) value).intValue();
            if ((columnValue >= this.lowAge) && (columnValue <= this.highAge)) {
                evaluation = true;
            } else {
                evaluation = false;
            }
        }
        return evaluation;
    }

    public boolean evaluate(RowSet rs) {
        if (rs == null) {
            return false;
        }

        FilteredRowSet frs = (FilteredRowSet) rs;
        boolean evaluation = false;
        try {
            int columnValue = frs.getInt(this.columnIndex);
            if ((columnValue >= this.lowAge) && (columnValue <= this.highAge)) {
                evaluation = true;
            }
        } catch (SQLException e) {
            return false;
        }
        return evaluation;
    }
}