org.hibernate.validator.internal.constraintvalidators.NotBlankValidator Maven / Gradle / Ivy
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* Copyright 2010, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.hibernate.validator.internal.constraintvalidators;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import org.hibernate.validator.constraints.NotBlank;
/**
* Check that a character sequence's (e.g. string) trimmed length is not empty.
*
* @author Hardy Ferentschik
*/
public class NotBlankValidator implements ConstraintValidator {
public void initialize(NotBlank annotation) {
}
/**
* Checks that the trimmed string is not empty.
*
* @param charSequence The character sequence to validate.
* @param constraintValidatorContext context in which the constraint is evaluated.
*
* @return Returns true
if the string is null
or the length of charSequence
between the specified
* min
and max
values (inclusive), false
otherwise.
*/
public boolean isValid(CharSequence charSequence, ConstraintValidatorContext constraintValidatorContext) {
if ( charSequence == null ) {
return true;
}
return charSequence.toString().trim().length() > 0;
}
}