Как разбирать массив JSON без keyName с Gson?

Question

У меня есть следующий JSON:

{ 
    "type": "FootprintCollection", 
    "footprints": [ 
     { 
      "type": "Footprint", 
      "geometry": { 
       "type": "MultiPolygon", 
       "coordinates": [ 
        [ 
         [ 
          [ 
           35.6893257989465, 
           50.3346798773745 
          ], 
          [ 
           35.6907727397702, 
           50.3383230660567 
          ], 
          [ 
           35.692323032482, 
           50.3446275905909 
          ], 
          [ 
           35.696663852255, 
           50.3455577665777 
          ], 
          [ 
           35.7100480485786, 
           50.3559964053099 
          ], 
          [ 
           35.7210034521477, 
           50.369070543271 
          ], 
          [ 
           35.7374365579508, 
           50.3819379747578 
          ], 
          [ 
           35.7459114928212, 
           50.384315090669 
          ], 
          [ 
           35.7651351256856, 
           50.3848835314499 
          ], 
          [ 
           35.7740751485493, 
           50.387260647361 
          ], 
          [ 
           35.7852372576933, 
           50.394857083088 
          ], 
          [ 
           35.8051326841261, 
           50.4125304223411 
          ], 
          [ 
           35.8190853212307, 
           50.4194033876562 
          ], 
          [ 
           35.8371720725332, 
           50.4235891786977 
          ], 
          [ 
           35.9315849136129, 
           50.4305396592779 
          ], 
          [ 
           36.1056311381665, 
           50.4214704452049 
          ], 
          [ 
           36.1330196466394, 
           50.4119619815602 
          ], 
          [ 
           36.1404610536348, 
           50.3933067894768 
          ], 
          [ 
           36.169089796457, 
           50.3840308698288 
          ], 
          [ 
           36.2687736341959, 
           50.281737372182 
          ], 
          [ 
           36.2917179701083, 
           50.2743993188735 
          ], 
          [ 
           36.3156441588509, 
           50.2752261420728 
          ], 
          [ 
           36.3392086114883, 
           50.2818407249695 
          ], 
          [ 
           36.3611194195257, 
           50.2919693062386 
          ], 
          [ 
           36.3807047866966, 
           50.3044233265753 
          ], 
          [ 
           36.3876811056985, 
           50.3068004424865 
          ], 
          [ 
           36.3998767436169, 
           50.3069554712181 
          ], 
          [ 
           36.4097469415681, 
           50.3049400905128 
          ], 
          [ 
           36.4303141615694, 
           50.2972403019984 
          ], 
          [ 
           36.4524316751817, 
           50.2939330101004 
          ], 
          [ 
           36.4799752132855, 
           50.2812722841886 
          ], 
          [ 
           36.5118595720617, 
           50.2768022732064 
          ], 
          [ 
           36.520747918082, 
           50.2744509957169 
          ], 
          [ 
           36.5361474951109, 
           50.267913927186 
          ], 
          [ 
           36.5386279638095, 
           50.2654076200657 
          ], 
          [ 
           36.5358374367484, 
           50.261247667446 
          ], 
          [ 
           36.5337187032556, 
           50.2390009626244 
          ], 
          [ 
           36.5313932632885, 
           50.2291824406172 
          ], 
          [ 
           36.5344421727681, 
           50.2203199330186 
          ], 
          [ 
           36.549221633072, 
           50.212542629239 
          ], 
          [ 
           36.5707190281607, 
           50.2072457950575 
          ], 
          [ 
           36.5940767761224, 
           50.2047911647805 
          ], 
          [ 
           36.6166076999854, 
           50.2067548695417 
          ], 
          [ 
           36.6355729513307, 
           50.2144029812127 
          ], 
          [ 
           36.6440995621451, 
           50.2226195336646 
          ], 
          [ 
           36.660119255899, 
           50.2442719592835 
          ], 
          [ 
           36.6695760435996, 
           50.2533670108789 
          ], 
          [ 
           36.682391798243, 
           50.2609634466058 
          ], 
          [ 
           36.8484281759197, 
           50.3240862090114 
          ], 
          [ 
           36.9137471861837, 
           50.3394082707752 
          ], 
          [ 
           36.9797896668597, 
           50.3424830186764 
          ], 
          [ 
           37.0514648785014, 
           50.3356875677271 
          ], 
          [ 
           37.1966756528591, 
           50.3627660178375 
          ], 
          [ 
           37.2263896012991, 
           50.3774421253539 
          ], 
          [ 
           37.2848873230915, 
           50.4156051702425 
          ], 
          [ 
           37.3144462419006, 
           50.4233307971786 
          ], 
          [ 
           37.4150085796823, 
           50.4322191431989 
          ], 
          [ 
           37.4350590348466, 
           50.4252945010405 
          ], 
          [ 
           37.449941847938, 
           50.399404608436 
          ], 
          [ 
           37.4635327489373, 
           50.3669001329349 
          ], 
          [ 
           37.479707472322, 
           50.340390122706 
          ], 
          [ 
           37.567867465711, 
           50.312872423024 
          ], 
          [ 
           37.5989250021872, 
           50.2911941598827 
          ], 
          [ 
           37.6012504412549, 
           50.2494137638342 
          ], 
          [ 
           37.5912252136727, 
           50.2256684431442 
          ], 
          [ 
           37.5883313329247, 
           50.2149714219936 
          ], 
          [ 
           37.5900366552675, 
           50.2041710471561 
          ], 
          [ 
           37.5969096205826, 
           50.197246405897 
          ], 
          [ 
           37.6316361832633, 
           50.1744312611938 
          ], 
          [ 
           37.7274442892226, 
           50.0790107288621 
          ], 
          [ 
           37.7631010269909, 
           50.0629393582648 
          ], 
          [ 
           37.8425277039904, 
           50.0394782575156 
          ], 
          [ 
           37.8813883808691, 
           50.0233552109743 
          ], 
          [ 
           37.915598178713, 
           50.0036148141724 
          ], 
          [ 
           37.9462423031399, 
           49.9785517438679 
          ], 
          [ 
           37.9786951026969, 
           49.9417839629596 
          ], 
          [ 
           37.9796769546278, 
           49.9399494494076 
          ], 
          [ 
           37.9950765316567, 
           49.9217076684742 
          ], 
          [ 
           37.9955932964935, 
           49.9062822539229 
          ], 
          [ 
           38.0001924986849, 
           49.9002102724862 
          ], 
          [ 
           38.0228267762348, 
           49.9095895449216 
          ], 
          [ 
           38.0242220393157, 
           49.9031558291782 
          ], 
          [ 
           38.0274776543703, 
           49.8938540720079 
          ], 
          [ 
           38.0434973490235, 
           49.8693594424843 
          ], 
          [ 
           38.0459778177222, 
           49.8666205922666 
          ], 
          [ 
           38.0518689311064, 
           49.8613237571857 
          ], 
          [ 
           38.0552795757918, 
           49.858843288487 
          ], 
          [ 
           38.0593103372024, 
           49.8566470406285 
          ], 
          [ 
           38.0789990580601, 
           49.8490506049015 
          ], 
          [ 
           38.0808594091345, 
           49.8462600778404 
          ], 
          [ 
           38.0800842627785, 
           49.8431078155733 
          ], 
          [ 
           38.0754333837437, 
           49.8399038764628 
          ], 
          [ 
           38.0704724463464, 
           49.8381468772766 
          ], 
          [ 
           38.0647363625931, 
           49.8373200549766 
          ], 
          [ 
           38.0426705258242, 
           49.8361831734148 
          ], 
          [ 
           38.0228267762348, 
           49.8324107935234 
          ], 
          [ 
           38.0053084657132, 
           49.8264938417175 
          ], 
          [ 
           38.000037469054, 
           49.8226439483596 
          ], 
          [ 
           37.9984871763422, 
           49.8203701852359 
          ], 
          [ 
           37.9975570003554, 
           49.8174504660662 
          ], 
          [ 
           37.9997274106915, 
           49.8139623070149 
          ], 
          [ 
           38.0015877617658, 
           49.8121794703064 
          ], 
          [ 
           38.0434973490235, 
           49.7907079127401 
          ], 
          [ 
           38.0453577000978, 
           49.7878657088355 
          ], 
          [ 
           38.0451509945228, 
           49.7848167993558 
          ], 
          [ 
           38.0410168803248, 
           49.7815611843013 
          ], 
          [ 
           38.0366243837084, 
           49.7793132595993 
          ], 
          [ 
           38.0234468929598, 
           49.7742748069368 
          ], 
          [ 
           38.0197261899118, 
           49.7718460150816 
          ], 
          [ 
           38.0164705748572, 
           49.7690554880204 
          ], 
          [ 
           38.013680047796, 
           49.765696519279 
          ], 
          [ 
           38.0113546078289, 
           49.761975816231 
          ], 
          [ 
           38.0093392271237, 
           49.7577383492455 
          ], 
          [ 
           38.0048433777197, 
           49.7505036487245 
          ], 
          [ 
           38.0009676450408, 
           49.7495217958942 
          ], 
          [ 
           37.9980220883488, 
           49.7494184431067 
          ], 
          [ 
           37.9739408708746, 
           49.7532424989422 
          ], 
          [ 
           37.9686698751147, 
           49.7527257350047 
          ], 
          [ 
           37.9644840840733, 
           49.7510204126619 
          ], 
          [ 
           37.9609184097569, 
           49.7485916208067 
          ], 
          [ 
           37.9542521500168, 
           49.743010565785 
          ], 
          [ 
           37.9421598648859, 
           49.7305048695042 
          ], 
          [ 
           37.9399894545497, 
           49.7269391951878 
          ], 
          [ 
           37.9393693378248, 
           49.7226500513588 
          ], 
          [ 
           37.9421598648859, 
           49.717379055599 
          ], 
          [ 
           37.9460355975648, 
           49.7147693956911 
          ], 
          [ 
           37.9506864765997, 
           49.714485174851 
          ], 
          [ 
           37.9776615739225, 
           49.7218749050029 
          ], 
          [ 
           37.9829325705817, 
           49.7223916689404 
          ], 
          [ 
           37.9882035663416, 
           49.7218749050029 
          ], 
          [ 
           37.9929061213205, 
           49.7201954210819 
          ], 
          [ 
           37.9960067076435, 
           49.7178441435924 
          ], 
          [ 
           37.9983321467113, 
           49.715544542047 
          ], 
          [ 
           38.0001924986849, 
           49.7126764997207 
          ], 
          [ 
           38.0006575866784, 
           49.7111262070089 
          ], 
          [ 
           38.0011226746718, 
           49.7084390327352 
          ], 
          [ 
           37.9992623226981, 
           49.6806629506347 
          ], 
          [ 
           37.9997274106915, 
           49.6684414742946 
          ], 
          [ 
           38.0009676450408, 
           49.6638681096256 
          ], 
          [ 
           38.0011226746718, 
           49.6605866561493 
          ], 
          [ 
           38.0003475274165, 
           49.6565042178954 
          ], 
          [ 
           37.9983321467113, 
           49.6520083684915 
          ], 
          [ 
           37.9929061213205, 
           49.6462722847382 
          ], 
          [ 
           37.9807621602455, 
           49.637073879456 
          ], 
          [ 
           37.97735151556, 
           49.6323713244771 
          ], 
          [ 
           37.9683598158529, 
           49.614594631537 
          ], 
          [ 
           37.9637089377173, 
           49.6094786645088 
          ], 
          [ 
           37.9589030290516, 
           49.6061455350884 
          ], 
          [ 
           37.9505314469687, 
           49.6033550071279 
          ], 
          [ 
           37.9471208022832, 
           49.6016755232069 
          ], 
          [ 
           37.9457255392023, 
           49.5998668480767 
          ], 
          [ 
           37.944485304853, 
           49.5967921001753 
          ], 
          [ 
           37.9458805679339, 
           49.5913919132063 
          ], 
          [ 
           37.9522367693115, 
           49.5772842473702 
          ] 
         ] 
        ] 
       ] 
      }, 
      "properties": { 
       "id": "14128565", 
       "custodian": "Natural Earth" 
      } 
     } 
    ], 
    "totalResults": "1" 
} 

И я суммируется с созданием POJO для coordinates.

public class Geometry { 

    String type; 

    Coordinates coordinates; 
} 

public class Coordinates { 

    // What need to be here??? 
} 

я застрял, потому что я не undertand, как я могу разобрать coordinates тег. Как я могу правильно реализовать структуру POJO?

Answer 1

Вы не видите ключи, потому что те не ключи, а значения. (Я действительно не вижу смысла иметь этот вложенный массив, который у вас есть в координатах).

Для разбора coordinate вы будете иметь что-то вроде этого

public class Geometry{ 

    private ArrayList<ArrayList<ArrayList<Double[]>>> coordinates; 
    //create getter and setter methods 

} 

разобрать его,

// Get Geometry object (however you do it) 
// Then use the getter method to get coordinates variable 
// Parse the nested arrays 

ArrayList<Double[]> values = geometry.getCoordinates().get(0).get(0).get(0); 

// You can now access the values, e.g. 
Double[] firstArray = values.get(0); 

Примечание: Я мог бы отсутствующий или превышение ArrayList. Просто проверьте его.

Answer 2

public class Coordinates { 
    float latitude; 
    float longitude; 
} 

public class CoordinatesList1 { 
    ArrayList<Coordinates> list1; 
} 

public class CoordinatesList2 { 
    ArrayList<CoordinatesList1> list2; 
} 

public class Geometry { 

    String type; 

    ArrayList<CoordinatesList2> coordinates; 
} 

Gson gson = new Gson(); 
CoordinatesList2[] myTypes = gson.fromJson("input.json", Geometry.class);