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 com.altinity.ice.rest.catalog.internal.rest;
  
  import com.fasterxml.jackson.annotation.JsonAutoDetect;
  import com.fasterxml.jackson.annotation.PropertyAccessor;
  import com.fasterxml.jackson.core.JsonFactory;
  import com.fasterxml.jackson.core.JsonFactoryBuilder;
  import com.fasterxml.jackson.databind.DeserializationFeature;
  import com.fasterxml.jackson.databind.ObjectMapper;
  import com.fasterxml.jackson.databind.PropertyNamingStrategies;
  import org.apache.iceberg.rest.RESTSerializers;
  
  /** "public" copy of {@link org.apache.iceberg.rest.RESTObjectMapper}. */
  public class RESTObjectMapper {
  
    private static final JsonFactory FACTORY =
        new JsonFactoryBuilder()
            .configure(JsonFactory.Feature.INTERN_FIELD_NAMES, false)
            .configure(JsonFactory.Feature.FAIL_ON_SYMBOL_HASH_OVERFLOW, false)
            .build();
    private static final ObjectMapper MAPPER = new ObjectMapper(FACTORY);
    private static volatile boolean isInitialized = false;
  
    private RESTObjectMapper() {}
  
    public static ObjectMapper mapper() {
      if (!isInitialized) {
        synchronized (RESTObjectMapper.class) {
          if (!isInitialized) {
            MAPPER.setVisibility(PropertyAccessor.FIELD, JsonAutoDetect.Visibility.ANY);
            MAPPER.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
            MAPPER.setPropertyNamingStrategy(new PropertyNamingStrategies.KebabCaseStrategy());
            RESTSerializers.registerAll(MAPPER);
            isInitialized = true;
          }
        }
      }
      return MAPPER;
    }
  }
  