com.google.inject.internal.Nullability Maven / Gradle / Ivy
/*
* Copyright (C) 2010 Google Inc.
*
* 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.google.inject.internal;
import java.lang.annotation.Annotation;
/**
* Whether a member supports null values injected.
*
* Support for {@code Nullable} annotations in Guice is loose. Any annotation type whose
* simplename is "Nullable" is sufficient to indicate support for null values injected.
*
*
This allows support for JSR-305's
* javax.annotation.meta.Nullable annotation and IntelliJ IDEA's
* org.jetbrains.annotations.Nullable.
*
* @author [email protected] (Jesse Wilson)
*/
public class Nullability {
private Nullability() {}
/** Returns true if the given annotation array contains an annotation named {@code Nullable}. */
public static boolean hasNullableAnnotation(Annotation[] annotations) {
for (Annotation a : annotations) {
Class type = a.annotationType();
if ("Nullable".equals(type.getSimpleName())) {
return true;
}
}
return false;
}
}