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/*
 *    Copyright (c) 2022 Ned Wolpert 
 *
 *    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.codeheadsystems.oop.mock.converter;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;
import java.io.InputStream;
import javax.inject.Inject;
import javax.inject.Singleton;

/**
 * The type Json converter.
 */
@Singleton
public class JsonConverter {

  private final ObjectMapper mapper;

  /**
   * Instantiates a new Json converter.
   *
   * @param mapper the mapper
   */
  @Inject
  public JsonConverter(final ObjectMapper mapper) {
    this.mapper = mapper;
  }

  /**
   * To json string.
   *
   * @param resource the resource
   * @return the string
   */
  public String toJson(final Object resource) {
    try {
      return mapper.writeValueAsString(resource);
    } catch (JsonProcessingException e) {
      throw new IllegalArgumentException("Unable to convert resource type:" + resource.getClass(), e);
    }
  }

  /**
   * Convert r.
   *
   * @param    the type parameter
   * @param json  the json
   * @param clazz the clazz
   * @return the r
   */
  public  R convert(final String json, final Class clazz) {
    try {
      return mapper.readValue(json, clazz);
    } catch (JsonProcessingException e) {
      throw new IllegalArgumentException("Unable to convert json string to " + clazz, e);
    }
  }

  /**
   * Convert r.
   *
   * @param          the type parameter
   * @param inputStream the input stream
   * @param clazz       the clazz
   * @return the r
   */
  public  R convert(final InputStream inputStream, final Class clazz) {
    try {
      return mapper.readValue(inputStream, clazz); // this will close the stream automatically.
    } catch (IOException e) {
      throw new IllegalArgumentException("Unable to convert input stream to " + clazz, e);
    }
  }

}