/*
    * Copyright 2017 LINE Corporation
    *
    * LINE Corporation 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:
    *
    *   https://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.linecorp.centraldogma.internal.api.v1;
  
  import static java.util.Objects.requireNonNull;
  
  import javax.annotation.Nullable;
  
  import com.fasterxml.jackson.annotation.JsonInclude;
  import com.fasterxml.jackson.annotation.JsonInclude.Include;
  import com.fasterxml.jackson.annotation.JsonProperty;
  import com.google.common.base.MoreObjects;
  import com.google.common.base.MoreObjects.ToStringHelper;
  
  import com.linecorp.centraldogma.common.ChangeType;
  
  @JsonInclude(Include.NON_NULL)
  public class ChangeDto<T> {
  
      private final String path;
  
      private final ChangeType type;
  
      private final T content;
  
      public ChangeDto(String path, ChangeType type, @Nullable T content) {
          this.path = requireNonNull(path, "path");
          this.type = requireNonNull(type, "type");
          this.content = content;
      }
  
      @JsonProperty("path")
      public String path() {
          return path;
      }
  
      @JsonProperty("type")
      public ChangeType type() {
          return type;
      }
  
      @Nullable
      @JsonProperty("content")
      public T content() {
          return content;
      }
  
      @Override
      public String toString() {
          final ToStringHelper stringHelper = MoreObjects.toStringHelper(this)
                                                         .add("path", path())
                                                         .add("type", type());
          if (content() != null) {
              stringHelper.add("content", content());
          }
  
          return stringHelper.toString();
      }
  }