com.ibm.passwordrules.standard
Class MinLengthConstraint

java.lang.Object
  |
  +--com.ibm.passwordrules.LexicalRule
        |
        +--com.ibm.passwordrules.standard.MinLengthConstraint

All Implemented Interfaces:

java.lang.Cloneable, Rule, java.io.Serializable

public class MinLengthConstraint

extends LexicalRule

This class implements built-in rule for restricting the minimum number of characters in a password.

See Also:

Serialized Form

Field Summary

static java.lang.String

TOO_SHORT Constant representing a message key in a property file

Fields inherited from class com.ibm.passwordrules.LexicalRule

DEFAULT_MAX_SEQUENTIAL_CHARACTERS, LOWER_CASE_ONLY, UPPER_CASE_ONLY

Constructor Summary

MinLengthConstraint()
Default constructor.

MinLengthConstraint(int min)
Constructor accepting int parameter representing minimum password length.

Method Summary

void	constrain(PasswordGenerator generator) Constrain the password generator to the allowed values.
int	getMin() Return minimum value of the length constraint.
boolean	join(Rule rule) Method tries to join the specified rule with one defined by this object.
boolean	validate(java.lang.String password, ValidationInfo validationInfo) Validate the given password using the given validation info.

Methods inherited from class com.ibm.passwordrules.LexicalRule

getParameter, setParameter, validateSafe

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TOO_SHORT

public static final java.lang.String TOO_SHORT

Constant representing a message key in a property file

See Also:

Constant Field Values

Constructor Detail

MinLengthConstraint

public MinLengthConstraint()

Default constructor.

MinLengthConstraint

public MinLengthConstraint(int min)

Constructor accepting int parameter representing minimum password length.

Parameters:

min - int value representing minimum password length.

Method Detail

getMin

public int getMin()

Return minimum value of the length constraint.

Returns:

int representing minimum value of the length constraint.

constrain

public void constrain(PasswordGenerator generator)

Constrain the password generator to the allowed values.

Specified by:

constrain in interface Rule

Overrides:

constrain in class LexicalRule

Parameters:

generator - including a character template to constrain.

validate

public boolean validate(java.lang.String password,
                        ValidationInfo validationInfo)
                 throws InvalidPasswordException

Validate the given password using the given validation info.

Parameters:

validationInfo - contains contextual information about the password being validated.

password - Password to validate.

Returns:

always return true

Throws:

InvalidPasswordException - thrown when password is invalid.

join

public boolean join(Rule rule)
             throws IncompatibleRulesException

Method tries to join the specified rule with one defined by this object. The more restrictive rule takes precedence.

Parameters:

rule - The rule to join

Returns:

True if the rule was successfuly joined, false otherwise.

Throws:

IncompatibleRulesException - thrown when two or more incompatible password rules are used.