content: /*
   * 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.beam.sdk.schemas.annotations;
  
  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;
  
  /**
   * Can be put on a constructor or a static method, in which case that constructor or method will be
   * used to created instance of the class by Beam's schema code.
   *
   * <p>For example, the following Java POJO.
   *
   * <pre><code>
   * {@literal @}DefaultSchema(JavaBeanSchema.class)
   *  class MyClass {
   *    public final String user;
   *    public final int age;
   *
   *   {@literal @}SchemaCreate
   *    public MyClass(String user, int age) {
   *      this.user = user;
   *      this.age = age;
   *    }
   *  }
   * </code></pre>
   *
   * <p>This tells Beam that this constructor can be used to construct instances. Beam will match up
   * the names of the constructor arguments to schema fields in order to decide how to create the
   * class from a Row.
   *
   * <p>This can also be used to annotate a static factory method on the class. For example:
   *
   * <pre><code>
   * {@literal @}DefaultSchema(JavaBeanSchema.class)
   *  class MyClass {
   *    public final String user;
   *    public final int age;
   *
   *    private MyClass(String user, int age) { this.user = user; this.age = age; }
   *
   *   {@literal @}SchemaCreate
   *    public static MyClass create(String user, int age) {
   *      return new MyClass(user, age);
   *    }
   * }
   * </code></pre>
   */
  @Documented
  @Retention(RetentionPolicy.RUNTIME)
  @Target({ElementType.CONSTRUCTOR, ElementType.METHOD})
  @SuppressWarnings({
    "rawtypes" // TODO(https://github.com/apache/beam/issues/20447)
  })
  public @interface SchemaCreate {}
  