/*
 * 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
 *
 *     https://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.avro.reflect;

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;

Declares that a Java type should be represented by an Avro union schema. May be used for base classes or interfaces whose instantiable subclasses can be listed in the parameters to the @Union annotation. If applied to method parameters this determines the reflected message parameter type. If applied to a method, this determines its return type. A null schema may be specified with Void. /**
 * Declares that a Java type should be represented by an Avro union schema. May
 * be used for base classes or interfaces whose instantiable subclasses can be
 * listed in the parameters to the @Union annotation. If applied to method
 * parameters this determines the reflected message parameter type. If applied
 * to a method, this determines its return type. A null schema may be specified
 * with {@link java.lang.Void}.
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.TYPE, ElementType.FIELD, ElementType.PARAMETER, ElementType.METHOD })
@Documented
public @interface Union {
  
The instantiable classes that compose this union. /** The instantiable classes that compose this union. */
  Class[] value();
}