com.vaadin.flow.data.validator

Class RangeValidator<T>

java.lang.Object

com.vaadin.flow.data.validator.AbstractValidator<T>

com.vaadin.flow.data.validator.RangeValidator<T>

Type Parameters:

T - the type to validate

All Implemented Interfaces:

Validator<T>, Serializable, BiFunction<T,ValueContext,ValidationResult>

Direct Known Subclasses:

BigDecimalRangeValidator, BigIntegerRangeValidator, ByteRangeValidator, DateRangeValidator, DateTimeRangeValidator, DoubleRangeValidator, FloatRangeValidator, IntegerRangeValidator, LongRangeValidator, ShortRangeValidator

public class RangeValidator<T>
extends AbstractValidator<T>

Verifies that a value is within the given range.

Since:

1.0.

Author:

Vaadin Ltd

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RangeValidator(String errorMessage, Comparator<? super T> comparator, T minValue, T maxValue) Creates a new range validator of the given type.

Method Summary

Modifier and Type	Method and Description
ValidationResult	apply(T value, ValueContext context) Returns Result.ok if the value is within the specified bounds, Result.error otherwise.
T	getMaxValue() Gets the maximum value of the range.
T	getMinValue() Returns the minimum value of the range.
boolean	isMaxValueIncluded() Returns whether the maximum value is part of the accepted range.
boolean	isMinValueIncluded() Returns whether the minimum value is part of the accepted range.
protected boolean	isValid(T value) Returns whether the given value lies in the valid range.
static <C extends Comparable<? super C>> RangeValidator<C>	of(String errorMessage, C minValue, C maxValue) Returns a RangeValidator comparing values of a Comparable type using their natural order.
void	setMaxValue(T maxValue) Sets the maximum value of the range.
void	setMaxValueIncluded(boolean maxValueIncluded) Sets whether the maximum value is part of the accepted range.
void	setMinValue(T minValue) Sets the minimum value of the range.
void	setMinValueIncluded(boolean minValueIncluded) Sets whether the minimum value is part of the accepted range.
String	toString()

Methods inherited from class com.vaadin.flow.data.validator.AbstractValidator

getMessage, toResult

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.vaadin.flow.data.binder.Validator

alwaysPass, from, from, from, from

Methods inherited from interface java.util.function.BiFunction

andThen

Constructor Detail

RangeValidator

public RangeValidator(String errorMessage,
                      Comparator<? super T> comparator,
                      T minValue,
                      T maxValue)

Creates a new range validator of the given type. Passing null to either minValue or maxValue means there is no limit in that direction. Both limits may be null; this can be useful if the limits are resolved programmatically. The result of passing null to apply depends on the given comparator.

Parameters:

errorMessage - the error message to return if validation fails, not null

comparator - the comparator to compare with, not null

minValue - the least value of the accepted range or null for no limit

maxValue - the greatest value of the accepted range or null for no limit

Method Detail

of

public static <C extends Comparable<? super C>> RangeValidator<C> of(String errorMessage,
                                                                     C minValue,
                                                                     C maxValue)

Returns a RangeValidator comparing values of a Comparable type using their natural order. Passing null to either minValue or maxValue means there is no limit in that direction. Both limits may be null; this can be useful if the limits are resolved programmatically.

Null is considered to be less than any non-null value. This means null never passes validation if a minimum value is specified.

Type Parameters:

C - the Comparable value type

Parameters:

errorMessage - the error message to return if validation fails, not null

minValue - the least value of the accepted range or null for no limit

maxValue - the greatest value of the accepted range or null for no limit

Returns:

the new validator

apply

public ValidationResult apply(T value,
                              ValueContext context)

Returns Result.ok if the value is within the specified bounds, Result.error otherwise. If null is passed to apply, the behavior depends on the used comparator.

Parameters:

value - the input value to validate

context - the value context for validation

Returns:

the validation result

isMinValueIncluded

public boolean isMinValueIncluded()

Returns whether the minimum value is part of the accepted range.

Returns:

true if the minimum value is part of the range, false otherwise

setMinValueIncluded

public void setMinValueIncluded(boolean minValueIncluded)

Sets whether the minimum value is part of the accepted range.

Parameters:

minValueIncluded - true if the minimum value should be part of the range, false otherwise

isMaxValueIncluded

public boolean isMaxValueIncluded()

Returns whether the maximum value is part of the accepted range.

Returns:

true if the maximum value is part of the range, false otherwise

setMaxValueIncluded

public void setMaxValueIncluded(boolean maxValueIncluded)

Sets whether the maximum value is part of the accepted range.

Parameters:

maxValueIncluded - true if the maximum value should be part of the range, false otherwise

getMinValue

public T getMinValue()

Returns the minimum value of the range.

Returns:

the minimum value

setMinValue

public void setMinValue(T minValue)

Sets the minimum value of the range. Use setMinValueIncluded(boolean) to control whether this value is part of the range or not.

Parameters:

minValue - the minimum value

getMaxValue

public T getMaxValue()

Gets the maximum value of the range.

Returns:

the maximum value

setMaxValue

public void setMaxValue(T maxValue)

Sets the maximum value of the range. Use setMaxValueIncluded(boolean) to control whether this value is part of the range or not.

Parameters:

maxValue - the maximum value

toString

public String toString()

Overrides:

toString in class Object

isValid

protected boolean isValid(T value)

Returns whether the given value lies in the valid range.

Parameters:

value - the value to validate

Returns:

true if the value is valid, false otherwise