private boolean checkFieldWithLetter()

in spring-quartz/src/main/java/org/apache/archiva/redback/components/scheduler/CronExpressionValidator.java [263:359]
87 lines of code
19 McCabe index (conditional complexity)

    private boolean checkFieldWithLetter( String value, String letter, int minimalBefore, int maximalBefore,
                                          int minimalAfter, int maximalAfter )
    {
        boolean canBeAlone = false;
        boolean canHaveIntBefore = false;
        boolean canHaveIntAfter = false;
        boolean mustHaveIntBefore = false;
        boolean mustHaveIntAfter = false;

        if ( "L".equals( letter ) )
        {
            canBeAlone = true;
            canHaveIntBefore = true;
            canHaveIntAfter = false;
            mustHaveIntBefore = false;
            mustHaveIntAfter = false;
        }
        if ( "W".equals( letter ) || "C".equals( letter ) )
        {
            canBeAlone = false;
            canHaveIntBefore = true;
            canHaveIntAfter = false;
            mustHaveIntBefore = true;
            mustHaveIntAfter = false;
        }
        if ( "#".equals( letter ) )
        {
            canBeAlone = false;
            canHaveIntBefore = true;
            canHaveIntAfter = true;
            mustHaveIntBefore = true;
            mustHaveIntAfter = true;
        }

        String beforeLetter = "";
        String afterLetter = "";

        if ( value.indexOf( letter ) >= 0 )
        {
            beforeLetter = value.substring( 0, value.indexOf( letter ) );
        }

        if ( !value.endsWith( letter ) )
        {
            afterLetter = value.substring( value.indexOf( letter ) + 1 );
        }

        if ( value.indexOf( letter ) >= 0 )
        {
            if ( letter.equals( value ) )
            {
                return canBeAlone;
            }

            if ( canHaveIntBefore )
            {
                if ( mustHaveIntBefore && beforeLetter.length() == 0 )
                {
                    return false;
                }

                if ( !checkIntValue( beforeLetter, minimalBefore, maximalBefore, true ) )
                {
                    return false;
                }
            }
            else
            {
                if ( beforeLetter.length() > 0 )
                {
                    return false;
                }
            }

            if ( canHaveIntAfter )
            {
                if ( mustHaveIntAfter && afterLetter.length() == 0 )
                {
                    return false;
                }

                if ( !checkIntValue( afterLetter, minimalAfter, maximalAfter, true ) )
                {
                    return false;
                }
            }
            else
            {
                if ( afterLetter.length() > 0 )
                {
                    return false;
                }
            }
        }

        return true;
    }