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A set of Jackson serializers and deserializers used in Inversoft CleanSpeak and FusionAuth
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/*
 * Copyright (c) 2015-2021, Inversoft Inc., All Rights Reserved
 *
 * Licensed 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.inversoft.json;

import java.util.Set;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.MapperFeature;
import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

/**
 * @author Brian Pontarelli
 */
public class ToString {
  private final static ObjectMapper objectMapper = new ObjectMapper();

  static {
    objectMapper.configure(DeserializationFeature.USE_BIG_DECIMAL_FOR_FLOATS, true)
                .configure(DeserializationFeature.USE_BIG_INTEGER_FOR_INTS, true)
                .configure(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY, true)
                .configure(SerializationFeature.INDENT_OUTPUT, true)
                // Ignores wrappers like Javassist
                .configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false)
                .configure(SerializationFeature.ORDER_MAP_ENTRIES_BY_KEYS, true)
                .setSerializationInclusion(JsonInclude.Include.NON_NULL)
                .registerModule(new JacksonModule());
  }

  public static void setJacksonModules(Set jacksonModules) {
    if (jacksonModules.size() > 0) {
      objectMapper.registerModules(jacksonModules);
    }
  }

  /**
   * A not-pretty printed JSON string. Returns a portable JSON string.
   *
   * @param o the object to serialize
   * @return a string representation of the object.
   */
  public static String toJSONString(Object o) {
    try {
      return objectMapper.writer().without(SerializationFeature.INDENT_OUTPUT).writeValueAsString(o);
    } catch (JsonProcessingException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * A pretty printed JSON string suitable for use in a {@link Object#toString()} override used for debug.
   *
   * @param o the object to serialize
   * @return a string representation of the object.
   */
  public static String toString(Object o) {
    try {
      return objectMapper.writeValueAsString(o);
    } catch (JsonProcessingException e) {
      throw new RuntimeException(e);
    }
  }
}