Как сортировать список объектов по полю в другом списке объектов?

Question

[renniqs]

Помогите с сортировкой, нужно отсортировать список, по полю объекта который в другом списке
Вот структура примерная структура, и сортировать нужно по value и определенному guid в Priority

class ResponseData {

	private User user;
	private List<Event> event;

	public static User {
	   private String name;	   
	   private String email;
	}

	public static class Event {
	   private String guid;
	   private List<Priority> priority;
	}

	public static class Priority {
	  private String guid;
	  private String name;
	  private String value;
	}

}

Пример входных данных:

[
  {
    "user": {
      "name": "Bob",
      "email": "[e-mail]"
    },
    "event": [
      {
        "guid": "1",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "35.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "25.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "85.98"
          }
        ]
      },
      {
        "guid": "2",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "14.19"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "75.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "75.98"
          }
        ]
      },
      {
        "guid": "3",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "95.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "29.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "65.98"
          }
        ]
      },
      {
        "guid": "4",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "99.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "19.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "85.98"
          }
        ]
      },
      {
        "guid": "5",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "97.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "39.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "95.98"
          }
        ]
      }
    ]
  }
]

Далее нужно сортировать список event по value в priority где guid равен sport

в результате получим что спсиок ивентов буде 2, 1, 3, 5, 4

Вот пример сортировки:

[
  {
    "user": {
      "name": "Bob",
      "email": "[e-mail]"
    },
    "event": [
      {
        "guid": "2",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "14.19"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "75.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "75.98"
          }
        ]
      },
      {
        "guid": "1",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "35.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "25.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "85.98"
          }
        ]
      },
      {
        "guid": "3",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "95.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "29.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "65.98"
          }
        ]
      },
      {
        "guid": "5",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "97.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "39.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "95.98"
          }
        ]
      },
      {
        "guid": "4",
        "priority": [
          {
            "guid": "sport",
            "name": "Sport",
            "value": "99.29"
          },
          {
            "guid": "work",
            "name": "work",
            "value": "19.19"
          },
          {
            "guid": "hobby",
            "name": "hobby",
            "value": "85.98"
          }
        ]
      }
    ]
  }
]

Answer 1

[Денис Загаевский]

Реализовать Comparable или Comparator, дальше стандартными средствами сортировки.