io.micronaut.validation.validator.constraints.DecimalMinValidator Maven / Gradle / Ivy
/*
* Copyright 2017-2020 original authors
*
* 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
*
* https://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 io.micronaut.validation.validator.constraints;
import io.micronaut.core.annotation.AnnotationValue;
import io.micronaut.core.convert.ConversionService;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import javax.validation.ValidationException;
import javax.validation.constraints.DecimalMin;
import java.math.BigDecimal;
/**
* Abstract implementation of a validator for {@link DecimalMin}.
*
* @param The target type.
* @since 1.2
* @author graemerocher
*/
@FunctionalInterface
public interface DecimalMinValidator extends ConstraintValidator {
@Override
default boolean isValid(@Nullable T value, @NonNull AnnotationValue annotationMetadata, @NonNull ConstraintValidatorContext context) {
if (value == null) {
// null considered valid according to spec
return true;
}
final BigDecimal bigDecimal = annotationMetadata.getValue(String.class)
.map(s ->
ConversionService.SHARED.convert(s, BigDecimal.class)
.orElseThrow(() -> new ValidationException(s + " does not represent a valid BigDecimal format.")))
.orElseThrow(() -> new ValidationException("null does not represent a valid BigDecimal format."));
int result;
try {
result = doComparison(value, bigDecimal);
} catch (NumberFormatException nfe) {
return false;
}
final boolean inclusive = annotationMetadata.get("inclusive", boolean.class).orElse(true);
return inclusive ? result >= 0 : result > 0;
}
/**
* Perform the comparison for the given value.
* @param value The value
* @param bigDecimal The big decimal
* @return The result
*/
int doComparison(@NonNull T value, @NonNull BigDecimal bigDecimal);
}