/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE369_Divide_by_Zero__int_database_divide_07.java
Label Definition File: CWE369_Divide_by_Zero__int.label.xml
Template File: sources-sinks-07.tmpl.java
*/
/*
* @description
* CWE: 369 Divide by zero
* BadSource: database Read data from a database
* GoodSource: A hardcoded non-zero, non-min, non-max, even number
* Sinks: divide
*    GoodSink: Check for zero before dividing
*    BadSink : Dividing by a value that may be zero
* Flow Variant: 07 Control flow: if(privateFive==5) and if(privateFive!=5)
*
* */






import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import java.util.logging.Level;

public class CWE369_Divide_by_Zero__int_database_divide_07 extends AbstractTestCase
{
    /* The variable below is not declared "final", but is never assigned
     * any other value so a tool should be able to identify that reads of
     * this will always give its initialized value. */
    private int privateFive = 5;

    public void bad() throws Throwable
    {
        int data;
        if (privateFive==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            /* Read data from a database */
            {
                Connection connection = null;
                PreparedStatement preparedStatement = null;
                ResultSet resultSet = null;
                try
                {
                    /* setup the connection */
                    connection = IO.getDBConnection();
                    /* prepare and execute a (hardcoded) query */
                    preparedStatement = connection.prepareStatement("select name from users where id=0");
                    resultSet = preparedStatement.executeQuery();
                    /* POTENTIAL FLAW: Read data from a database query resultset */
                    String stringNumber = resultSet.getString(1);
                    if (stringNumber != null) /* avoid NPD incidental warnings */
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch (NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                catch (SQLException exceptSql)
                {
                    IO.logger.log(Level.WARNING, "Error with SQL statement", exceptSql);
                }
                finally
                {
                    /* Close database objects */
                    try
                    {
                        if (resultSet != null)
                        {
                            resultSet.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing ResultSet", exceptSql);
                    }

                    try
                    {
                        if (preparedStatement != null)
                        {
                            preparedStatement.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
                    }

                    try
                    {
                        if (connection != null)
                        {
                            connection.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (privateFive==5)
        {
            /* POTENTIAL FLAW: Zero denominator will cause an issue.  An integer division will
            result in an exception. */
            IO.writeLine("bad: 100/" + data + " = " + (100 / data) + "\n");
        }
    }

    /* goodG2B1() - use goodsource and badsink by changing first privateFive==5 to privateFive!=5 */
    private void goodG2B1() throws Throwable
    {
        int data;
        if (privateFive!=5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }
        else
        {

            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;

        }

        if (privateFive==5)
        {
            /* POTENTIAL FLAW: Zero denominator will cause an issue.  An integer division will
            result in an exception. */
            IO.writeLine("bad: 100/" + data + " = " + (100 / data) + "\n");
        }
    }

    /* goodG2B2() - use goodsource and badsink by reversing statements in first if */
    private void goodG2B2() throws Throwable
    {
        int data;
        if (privateFive==5)
        {
            /* FIX: Use a hardcoded number that won't cause underflow, overflow, divide by zero, or loss-of-precision issues */
            data = 2;
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (privateFive==5)
        {
            /* POTENTIAL FLAW: Zero denominator will cause an issue.  An integer division will
            result in an exception. */
            IO.writeLine("bad: 100/" + data + " = " + (100 / data) + "\n");
        }
    }

    /* goodB2G1() - use badsource and goodsink by changing second privateFive==5 to privateFive!=5 */
    private void goodB2G1() throws Throwable
    {
        int data;
        if (privateFive==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            /* Read data from a database */
            {
                Connection connection = null;
                PreparedStatement preparedStatement = null;
                ResultSet resultSet = null;
                try
                {
                    /* setup the connection */
                    connection = IO.getDBConnection();
                    /* prepare and execute a (hardcoded) query */
                    preparedStatement = connection.prepareStatement("select name from users where id=0");
                    resultSet = preparedStatement.executeQuery();
                    /* POTENTIAL FLAW: Read data from a database query resultset */
                    String stringNumber = resultSet.getString(1);
                    if (stringNumber != null) /* avoid NPD incidental warnings */
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch (NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                catch (SQLException exceptSql)
                {
                    IO.logger.log(Level.WARNING, "Error with SQL statement", exceptSql);
                }
                finally
                {
                    /* Close database objects */
                    try
                    {
                        if (resultSet != null)
                        {
                            resultSet.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing ResultSet", exceptSql);
                    }

                    try
                    {
                        if (preparedStatement != null)
                        {
                            preparedStatement.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
                    }

                    try
                    {
                        if (connection != null)
                        {
                            connection.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (privateFive!=5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
            IO.writeLine("Benign, fixed string");
        }
        else
        {

            /* FIX: test for a zero denominator */
            if (data != 0)
            {
                IO.writeLine("100/" + data + " = " + (100 / data) + "\n");
            }
            else
            {
                IO.writeLine("This would result in a divide by zero");
            }

        }
    }

    /* goodB2G2() - use badsource and goodsink by reversing statements in second if  */
    private void goodB2G2() throws Throwable
    {
        int data;
        if (privateFive==5)
        {
            data = Integer.MIN_VALUE; /* Initialize data */
            /* Read data from a database */
            {
                Connection connection = null;
                PreparedStatement preparedStatement = null;
                ResultSet resultSet = null;
                try
                {
                    /* setup the connection */
                    connection = IO.getDBConnection();
                    /* prepare and execute a (hardcoded) query */
                    preparedStatement = connection.prepareStatement("select name from users where id=0");
                    resultSet = preparedStatement.executeQuery();
                    /* POTENTIAL FLAW: Read data from a database query resultset */
                    String stringNumber = resultSet.getString(1);
                    if (stringNumber != null) /* avoid NPD incidental warnings */
                    {
                        try
                        {
                            data = Integer.parseInt(stringNumber.trim());
                        }
                        catch (NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                catch (SQLException exceptSql)
                {
                    IO.logger.log(Level.WARNING, "Error with SQL statement", exceptSql);
                }
                finally
                {
                    /* Close database objects */
                    try
                    {
                        if (resultSet != null)
                        {
                            resultSet.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing ResultSet", exceptSql);
                    }

                    try
                    {
                        if (preparedStatement != null)
                        {
                            preparedStatement.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing PreparedStatement", exceptSql);
                    }

                    try
                    {
                        if (connection != null)
                        {
                            connection.close();
                        }
                    }
                    catch (SQLException exceptSql)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Connection", exceptSql);
                    }
                }
            }
        }
        else
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run
             * but ensure data is inititialized before the Sink to avoid compiler errors */
            data = 0;
        }

        if (privateFive==5)
        {
            /* FIX: test for a zero denominator */
            if (data != 0)
            {
                IO.writeLine("100/" + data + " = " + (100 / data) + "\n");
            }
            else
            {
                IO.writeLine("This would result in a divide by zero");
            }
        }
    }

    public void good() throws Throwable
    {
        goodG2B1();
        goodG2B2();
        goodB2G1();
        goodB2G2();
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
