edu.vt.middleware.password
Class AbstractSequenceRule

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

All Implemented Interfaces:

Rule

Direct Known Subclasses:

AlphabeticalSequenceRule, NumericalSequenceRule, QwertySequenceRule

public abstract class AbstractSequenceRule
extends java.lang.Object
implements Rule

AbstractSequenceRule contains functionality common to keyboard sequence rules.

Version:

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

Author:

Middleware Services

Field Summary

static int	DEFAULT_SEQUENCE_LENGTH Default length of keyboard sequence, value is 5.
static int	MINIMUM_SEQUENCE_LENGTH Minimum length of keyboard sequence, value is 3.
protected int	sequenceLength Number of characters in sequence to match.
protected boolean	wrapSequence Whether or not to wrap a sequence when searching for matches.

Constructor Summary

AbstractSequenceRule()

Method Summary

protected abstract char[][]	getSequence(int n) Get the sequence of character pairs for which to search.
protected abstract int	getSequenceCount() Get the number of character sequences used in this implementation.
protected void	setSequenceLength(int sl) Sets the sequence length.
java.lang.String	toString() This returns a string representation of this object.
RuleResult	validate(PasswordData passwordData) This returns whether or not the supplied password data meets the requirements of this rule.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_SEQUENCE_LENGTH

public static final int DEFAULT_SEQUENCE_LENGTH

Default length of keyboard sequence, value is 5.

See Also:

Constant Field Values

MINIMUM_SEQUENCE_LENGTH

public static final int MINIMUM_SEQUENCE_LENGTH

Minimum length of keyboard sequence, value is 3.

See Also:

Constant Field Values

sequenceLength

protected int sequenceLength

Number of characters in sequence to match.

wrapSequence

protected boolean wrapSequence

Whether or not to wrap a sequence when searching for matches.

Constructor Detail

AbstractSequenceRule

public AbstractSequenceRule()

Method Detail

validate

public RuleResult validate(PasswordData passwordData)

This returns whether or not the supplied password data meets the requirements of this rule.

Specified by:

validate in interface Rule

Parameters:

passwordData - PasswordData to verify (not null).

Returns:

RuleResult - details on password verification

toString

public java.lang.String toString()

This returns a string representation of this object.

Overrides:

toString in class java.lang.Object

Returns:

String

setSequenceLength

protected void setSequenceLength(int sl)

Sets the sequence length.

Parameters:

sl - int sequence length

getSequence

protected abstract char[][] getSequence(int n)

Get the sequence of character pairs for which to search.

Parameters:

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

Returns:

char[][] character sequence.

getSequenceCount

protected abstract int getSequenceCount()

Get the number of character sequences used in this implementation.

Returns:

int number of character sequences.