/* | |
* Licensed to the Apache Software Foundation (ASF) under one or more | |
* contributor license agreements. See the NOTICE file distributed with | |
* this work for additional information regarding copyright ownership. | |
* The ASF licenses this file to You 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.apache.bval.util; | |
import java.lang.reflect.ParameterizedType; | |
import java.lang.reflect.Type; | |
import java.lang.reflect.WildcardType; | |
import java.util.stream.Stream; | |
import javax.validation.ConstraintDefinitionException; | |
import javax.validation.ConstraintValidator; | |
import org.apache.bval.util.reflection.TypeUtils; | |
public class ValidatorUtils { | |
private static final WildcardType UNBOUNDED = TypeUtils.wildcardType().build(); | |
private static final String CV = ConstraintValidator.class.getSimpleName(); | |
public static Class<?> getValidatedType(Class<? extends ConstraintValidator<?, ?>> validatorType) { | |
final Type result = TypeUtils.getTypeArguments(validatorType, ConstraintValidator.class) | |
.get(ConstraintValidator.class.getTypeParameters()[1]); | |
if (!isSupported(result)) { | |
Exceptions.raise(ConstraintDefinitionException::new, "Validated type %s declared by %s %s is unsupported", | |
result, CV, validatorType.getName()); | |
} | |
return TypeUtils.getRawType(result, null); | |
} | |
private static boolean isSupported(Type validatedType) { | |
if (validatedType instanceof Class<?>) { | |
return true; | |
} | |
if (validatedType instanceof ParameterizedType) { | |
return Stream.of(((ParameterizedType) validatedType).getActualTypeArguments()) | |
.allMatch(arg -> TypeUtils.equals(arg, UNBOUNDED)); | |
} | |
return false; | |
} | |
} |