com.vaadin.data.validator.

Class NullValidator

  • All Implemented Interfaces:

    Validator, Serializable


    public class NullValidator
extends Object
implements Validator

    This validator is used for validating properties that do or do not allow null values. By default, nulls are not allowed.

    Since:

    3.0

    Author:

    Vaadin Ltd.

    See Also:

    Serialized Form

    • Constructor Detail

      • NullValidator

        public NullValidator(String errorMessage,
                     boolean onlyNullAllowed)

        Creates a new NullValidator.

        Parameters:

        errorMessage - the error message to display on invalidation.

        onlyNullAllowed - Are only nulls allowed?

    • Method Detail

      • validate

        public void validate(Object value)
              throws Validator.InvalidValueException

        Validates the data given in value.

        Specified by:

        validate in interface Validator

        Parameters:

        value - the value to validate.

        Throws:

        Validator.InvalidValueException - if the value was invalid.

      • isNullAllowed

        public final boolean isNullAllowed()

        Returns true if nulls are allowed otherwise false.

      • setNullAllowed

        public void setNullAllowed(boolean onlyNullAllowed)

        Sets if nulls (and only nulls) are to be allowed.

        Parameters:

        onlyNullAllowed - If true, only nulls are allowed. If false only non-nulls are allowed. Do we allow nulls?

      • getErrorMessage

        public String getErrorMessage()

        Gets the error message that is displayed in case the value is invalid.

        Returns:

        the Error Message.

      • setErrorMessage

        public void setErrorMessage(String errorMessage)

        Sets the error message to be displayed on invalid value.

        Parameters:

        errorMessage - the Error Message to set.