org.hibernate.validator.internal.constraintvalidators.bv.DigitsValidatorForNumber Maven / Gradle / Ivy
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JSR 380's RI, Hibernate Validator version ${hibernate-validator.version} and its dependencies repackaged as OSGi bundle
/*
* 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;
import java.lang.invoke.MethodHandles;
import java.math.BigDecimal;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
import javax.validation.constraints.Digits;
import org.hibernate.validator.internal.util.logging.Log;
import org.hibernate.validator.internal.util.logging.LoggerFactory;
/**
* Validates that the {@code Number} being validated matches the pattern
* defined in the constraint.
*
* @author Alaa Nassef
* @author Hardy Ferentschik
*/
public class DigitsValidatorForNumber implements ConstraintValidator {
private static final Log LOG = LoggerFactory.make( MethodHandles.lookup() );
private int maxIntegerLength;
private int maxFractionLength;
@Override
public void initialize(Digits constraintAnnotation) {
this.maxIntegerLength = constraintAnnotation.integer();
this.maxFractionLength = constraintAnnotation.fraction();
validateParameters();
}
@Override
public boolean isValid(Number num, ConstraintValidatorContext constraintValidatorContext) {
//null values are valid
if ( num == null ) {
return true;
}
BigDecimal bigNum;
if ( num instanceof BigDecimal ) {
bigNum = (BigDecimal) num;
}
else {
bigNum = new BigDecimal( num.toString() ).stripTrailingZeros();
}
int integerPartLength = bigNum.precision() - bigNum.scale();
int fractionPartLength = bigNum.scale() < 0 ? 0 : bigNum.scale();
return ( maxIntegerLength >= integerPartLength && maxFractionLength >= fractionPartLength );
}
private void validateParameters() {
if ( maxIntegerLength < 0 ) {
throw LOG.getInvalidLengthForIntegerPartException();
}
if ( maxFractionLength < 0 ) {
throw LOG.getInvalidLengthForFractionPartException();
}
}
}