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/*
* Copyright 2017 ~ 2025 the original author or authors. James Wong
*
* 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 com.wl4g.infra.common.validation;
import static com.wl4g.infra.common.reflect.ReflectionUtils2.findField;
import static com.wl4g.infra.common.reflect.ReflectionUtils2.getField;
import static com.wl4g.infra.common.reflect.ReflectionUtils2.makeAccessible;
import static java.util.Objects.nonNull;
import static org.apache.commons.lang3.StringUtils.equalsIgnoreCase;
import static org.apache.commons.lang3.StringUtils.isBlank;
import java.lang.reflect.Field;
import javax.validation.ConstraintValidator;
import javax.validation.ConstraintValidatorContext;
/**
* {@link EnumValidator}
*
* @author James Wong
* @version 2022-09-16
* @since v3.0.0
*/
public class EnumValidator implements ConstraintValidator {
private Class[] enumClass;
private String fieldName;
private boolean caseSensitive;
@Override
public void initialize(EnumValue constraintAnnotation) {
this.enumClass = constraintAnnotation.enumCls();
this.fieldName = constraintAnnotation.enumField();
this.caseSensitive = constraintAnnotation.caseSensitive();
}
@SuppressWarnings("rawtypes")
@Override
public boolean isValid(Object value, ConstraintValidatorContext context) {
if (nonNull(value) && !isBlank(value.toString())) {
if (enumClass.length > 0) {
for (Class cl : enumClass) {
if (cl.isEnum()) {
try {
// Match enum constant name.
Enum[] constants = (Enum[]) cl.getEnumConstants();
for (Enum constant : constants) {
String constantName = constant.name();
if (caseSensitive ? constantName.equals(value.toString())
: equalsIgnoreCase(constantName, value.toString())) {
return true;
}
}
// Matches property values of enum constants.
if (!isBlank(fieldName)) {
Field field = findField(cl, fieldName);
if (nonNull(field)) {
makeAccessible(field);
for (Object constant : constants) {
Object fieldValue = getField(field, constant);
if (nonNull(fieldValue)) {
String fieldValueStr = fieldValue.toString();
if (caseSensitive ? fieldValueStr.equals(value.toString())
: equalsIgnoreCase(fieldValueStr, value.toString())) {
return true;
}
}
}
}
}
} catch (Exception e) {
throw new IllegalStateException(e);
}
}
}
} else {
return true;
}
}
// When the value is null, the assertion check is ignored. If you need
// to assert that it is not empty, you should add annotations such as
// @NotNull
return true;
}
}