/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE476_NULL_Pointer_Dereference__binary_if_06.java
Label Definition File: CWE476_NULL_Pointer_Dereference.pointflaw.label.xml
Template File: point-flaw-06.tmpl.java
*/
/*
* @description
* CWE: 476 NULL Pointer Dereference
* Sinks: binary_if
*    GoodSink: Do not check for null after the object has been dereferenced
*    BadSink : Check for null after an object has already been dereferenced
* Flow Variant: 06 Control flow: if(PRIVATE_STATIC_FINAL_FIVE==5) and if(PRIVATE_STATIC_FINAL_FIVE!=5)
*
* */





public class CWE476_NULL_Pointer_Dereference__binary_if_06 extends AbstractTestCase
{
    /* The variable below is declared "final", so a tool should be able
     * to identify that reads of this will always give its initialized
     * value.
     */
    private static final int PRIVATE_STATIC_FINAL_FIVE = 5;

    public void bad() throws Throwable
    {
        if (PRIVATE_STATIC_FINAL_FIVE == 5)
        {
            {
                String myString = null;
                /* FLAW: Using a single & in the if statement will cause both sides of the expression to be evaluated
                 * thus causing a NPD */
                if ((myString != null) & (myString.length() > 0))
                {
                    IO.writeLine("The string length is greater than 0");
                }
            }
        }
    }

    /* good1() changes PRIVATE_STATIC_FINAL_FIVE==5 to PRIVATE_STATIC_FINAL_FIVE!=5 */
    private void good1() throws Throwable
    {
        if (PRIVATE_STATIC_FINAL_FIVE != 5)
        {
            /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
            IO.writeLine("Benign, fixed string");
        }
        else
        {

            {
                String myString = null;

                /* FIX: Use && in the if statement so that if the left side of the expression fails then
                 * the right side will not be evaluated */
                if ((myString != null) && (myString.length() > 0))
                {
                    IO.writeLine("The string length is greater than 0");
                }
            }

        }
    }

    /* good2() reverses the bodies in the if statement */
    private void good2() throws Throwable
    {
        if (PRIVATE_STATIC_FINAL_FIVE == 5)
        {
            {
                String myString = null;
                /* FIX: Use && in the if statement so that if the left side of the expression fails then
                 * the right side will not be evaluated */
                if ((myString != null) && (myString.length() > 0))
                {
                    IO.writeLine("The string length is greater than 0");
                }
            }
        }
    }

    public void good() throws Throwable
    {
        good1();
        good2();
    }

    /* 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);
    }
}
