org.hibernate.validator.internal.constraintvalidators.bv.number.sign.NegativeOrZeroValidatorForCharSequence Maven / Gradle / Ivy

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Hibernate's Jakarta Bean Validation reference implementation.

There is a newer version: 8.0.1.Final

/*
 * Hibernate Validator, declare and validate application constraints
 *
 * License: Apache License, Version 2.0
 * See the license.txt file in the root directory or .
 */
package org.hibernate.validator.internal.constraintvalidators.bv.number.sign;

import java.math.BigDecimal;

import jakarta.validation.ConstraintValidator;
import jakarta.validation.ConstraintValidatorContext;
import jakarta.validation.constraints.NegativeOrZero;

/**
 * Check that the number being validated is negative or zero.
 *
 * @author Guillaume Smet
 */
public class NegativeOrZeroValidatorForCharSequence implements ConstraintValidator {

	@Override
	public boolean isValid(CharSequence value, ConstraintValidatorContext context) {
		// null values are valid
		if ( value == null ) {
			return true;
		}

		try {
			return NumberSignHelper.signum( new BigDecimal( value.toString() ) ) <= 0;
		}
		catch (NumberFormatException nfe) {
			return false;
		}
	}
}