edu.vt.middleware.password
Class NumericalSequenceRule

java.lang.Object
  edu.vt.middleware.password.AbstractSequenceRule
      edu.vt.middleware.password.NumericalSequenceRule

All Implemented Interfaces:

Rule

public class NumericalSequenceRule
extends AbstractSequenceRule

NumericalSequenceRule contains methods for determining if a password contains a numerical keyboard sequence. The default sequence length is 5 characters.

• Sequences are of the form: '23456'
• If wrap=true: '90123' will match

Version:

$Revision: 1841 $ $Date: 2011-02-25 14:05:47 -0500 (Fri, 25 Feb 2011) $

Author:

Middleware Services

Field Summary

Fields inherited from class edu.vt.middleware.password.AbstractSequenceRule

DEFAULT_SEQUENCE_LENGTH, MINIMUM_SEQUENCE_LENGTH, sequenceLength, wrapSequence

Constructor Summary

NumericalSequenceRule()
This creates a new NumericalSequenceRule with the default sequence length.

NumericalSequenceRule(int length, boolean wrap)
This will create a new NumericalSequenceRule with the supplied sequence length and wrap settings.

Method Summary

protected char[][]	getSequence(int n) Get the sequence of character pairs for which to search.
protected int	getSequenceCount() Get the number of character sequences used in this implementation.

Methods inherited from class edu.vt.middleware.password.AbstractSequenceRule

setSequenceLength, toString, validate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

NumericalSequenceRule

public NumericalSequenceRule()

This creates a new NumericalSequenceRule with the default sequence length.

NumericalSequenceRule

public NumericalSequenceRule(int length,
                             boolean wrap)

This will create a new NumericalSequenceRule with the supplied sequence length and wrap settings.

Parameters:

length - Length of sequence to search for.

wrap - True to wrap sequences when searching for matches, false otherwise. Default is false.

Method Detail

getSequence

protected char[][] getSequence(int n)

Get the sequence of character pairs for which to search.

Specified by:

getSequence in class AbstractSequenceRule

Parameters:

n - int provides support for multiple character sequences that are indexed from 0 to n.

Returns:

char[][] character sequence.

getSequenceCount

protected int getSequenceCount()

Get the number of character sequences used in this implementation.

Specified by:

getSequenceCount in class AbstractSequenceRule

Returns:

int number of character sequences.