/*
* 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.flink.api.common.typeinfo;
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import java.lang.reflect.Type;
import org.apache.flink.annotation.Public;
import org.apache.flink.api.java.typeutils.TypeExtractor;
/**
* Annotation for specifying a corresponding {@link TypeInfoFactory} that can produce
* {@link TypeInformation} for the annotated type. In a hierarchy of types the closest annotation
* that defines a factory will be chosen while traversing upwards, however, a globally registered
* factory has highest precedence (see {@link TypeExtractor#registerFactory(Type, Class)}).
*/
@Documented
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Public
public @interface TypeInfo {
Class<? extends TypeInfoFactory> value();
}