de.jstacs.parameters.validation
Interface Constraint

All Superinterfaces:

Cloneable, Storable

All Known Implementing Classes:

SimpleStaticConstraint

public interface Constraint
extends Storable, Cloneable

Interface for a constraint that must be fulfilled in a ConstraintValidator.

Author:

Jan Grau

Field Summary

static int	EQUALS The condition is equality
static int	GEQ The condition is greater or equal
static int	GT The condition is greater than
static int	LEQ The condition is less or equal
static int	LT The condition is less than

Method Summary

boolean	check(Object value) Checks value for the constraint defined in the Constraint.
Constraint	clone() This method returns a deep copy of the current instance.
String	getErrorMessage() Returns the message of the last error (missed constraint) or null if the constraint was fulfilled by the last checked value.

Methods inherited from interface de.jstacs.Storable

toXML

Field Detail

EQUALS

static final int EQUALS

The condition is equality

See Also:

Constant Field Values

LT

static final int LT

The condition is less than

See Also:

Constant Field Values

GT

static final int GT

The condition is greater than

See Also:

Constant Field Values

LEQ

static final int LEQ

The condition is less or equal

See Also:

Constant Field Values

GEQ

static final int GEQ

The condition is greater or equal

See Also:

Constant Field Values

Method Detail

check

boolean check(Object value)

Checks value for the constraint defined in the Constraint. If the constraint is fulfilled, true is returned.

Parameters:

value - the Object to be checked

Returns:

true if the constraint is fulfilled, false otherwise

getErrorMessage

String getErrorMessage()

Returns the message of the last error (missed constraint) or null if the constraint was fulfilled by the last checked value.

Returns:

the message of the last error or null

clone

Constraint clone()
                 throws CloneNotSupportedException

This method returns a deep copy of the current instance.

Returns:

a deep copy of the current instance

Throws:

CloneNotSupportedException - if the Constraint could not be cloned

See Also:

Cloneable