common/common-rest/src/main/java/org/apache/servicecomb/common/rest/codec/RestObjectMapperFactory.java

/*
 * 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.servicecomb.common.rest.codec;

import java.util.List;

import org.apache.servicecomb.foundation.common.utils.AbstractRestObjectMapper;
import org.apache.servicecomb.foundation.common.utils.RestObjectMapper;
import org.apache.servicecomb.foundation.common.utils.SPIServiceUtils;

import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * Manage RestObjectMapper instances. Give users an option to specify custom mappers.
 */
public class RestObjectMapperFactory {
  private static AbstractRestObjectMapper defaultMapper = new RestObjectMapper();

  private static final AbstractRestObjectMapper viewMapper = new RestObjectMapper();

  private static AbstractRestObjectMapper consumerWriterMapper = defaultMapper;

  static {
    registerModules(defaultMapper);
    registerModules(viewMapper);
  }

  private static void registerModules(ObjectMapper mapper) {
    // not use mapper.findAndRegisterModules()
    // because we need to sort modules, so that customers can override our default module
    List<Module> modules = SPIServiceUtils.getOrLoadSortedService(Module.class);
    mapper.registerModules(modules.toArray(new Module[0]));
  }

  public static AbstractRestObjectMapper getConsumerWriterMapper() {
    return consumerWriterMapper;
  }

  public static AbstractRestObjectMapper getRestObjectMapper() {
    return defaultMapper;
  }

  public static AbstractRestObjectMapper getRestViewMapper() {
    return viewMapper;
  }

  public static void setConsumerWriterMapper(AbstractRestObjectMapper customMapper) {
    registerModules(customMapper);
    consumerWriterMapper = customMapper;
  }

  public static void setDefaultRestObjectMapper(AbstractRestObjectMapper customMapper) {
    registerModules(customMapper);
    defaultMapper = customMapper;
  }
}