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.arrow.vector.types.pojo;
  
  import java.util.concurrent.ConcurrentHashMap;
  import java.util.concurrent.ConcurrentMap;
  import org.apache.arrow.vector.types.pojo.ArrowType.ExtensionType;
  
  /** A registry of recognized extension types. */
  public final class ExtensionTypeRegistry {
    private static final ConcurrentMap<String, ExtensionType> registry = new ConcurrentHashMap<>();
  
    public static void register(ExtensionType type) {
      registry.put(type.extensionName(), type);
    }
  
    public static void unregister(ExtensionType type) {
      registry.remove(type.extensionName());
    }
  
    public static ExtensionType lookup(String name) {
      return registry.get(name);
    }
  }
  