org.factcast.factus.serializer.ProjectionMetaData Maven / Gradle / Ivy

Go to download
/*
 * Copyright © 2017-2020 factcast.org
 *
 * 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 org.factcast.factus.serializer;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.util.Optional;
import lombok.NonNull;
import lombok.experimental.UtilityClass;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
@SuppressWarnings("java:S1133")
public @interface ProjectionMetaData {
  String name() default "";

  /** will be made required as soon as serial() is removed */
  long revision() default 0;

  @UtilityClass
  class Resolver {
    public static Optional resolveFor(@NonNull Class clazz) {
      return Optional.ofNullable(clazz.getAnnotation(ProjectionMetaData.class));
    }
  }
}