Examples of com.google.gson.Gson.fromJson()

com.google.gson.Gson.fromJson()
This method deserializes the specified Json into an object of the specified class. It is not suitable to use if the specified class is a generic type since it will not have the generic type information because of the Type Erasure feature of Java. Therefore, this method should not be used if the desired type is a generic type. Note that this method works fine if the any of the fields of the specified object are generics, just the object itself should not be a generic type. For the cases when the object is of generic type, invoke {@link #fromJson(String,Type)}. If you have the Json in a {@link Reader} instead ofa String, use {@link #fromJson(Reader,Class)} instead. @param < T> the type of the desired object @param json the string from which the object is to be deserialized @param classOfT the class of T @return an object of type T from the string @throws JsonParseException if json is not a valid representation for an object of typeclassOfT

    while ((line = reader.readLine()) != null) {
      AllLines = AllLines + line;
    }
    reader.close();
    Gson gson = new Gson();
    DaoCommunityClan2 daoCommunityClan = gson.fromJson(AllLines, DaoCommunityClan2.class);
    daoCommunityClan.setIdClan(idClan);
    daoCommunityClan.setDateCommunityClan(date);
    //persist clan ?
    
    CommunityClan communityClan = TransformDtoObject.TransformCommunityDaoCommunityClanToCommunityClan(daoCommunityClan);

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      Gson gson = new Gson();
      //System.out.println("before " + AllLines);
      
      //parsing gson
      DossierToJson dossierToJson = gson.fromJson(AllLines, DossierToJson.class );
      //System.out.println(dossierToJson.tanks);
      
      //il nous faut les descriptions des tanks pour chaque ID 
      //https://raw.githubusercontent.com/Phalynx/WoT-Dossier-Cache-to-JSON/master/tanks.json
      /*

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      gson = new Gson();
      //System.out.println("before " + AllLines);
      
      //parsing gson
      TankToJson[] listTanksToJson = gson.fromJson(AllLines,TankToJson[].class );
      System.out.println(listTanksToJson);
      //la clé correspond à l'id du tank + id country : idTank_idCountry
      HashMap<String, TankToJson> hmTanksJson =  new HashMap<String, TankToJson>();
          
      for(TankToJson tk : listTanksToJson) {

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        while ((line = reader.readLine()) != null) {
          AllLines = AllLines + line;
        }
        reader.close();
        gson = new Gson();
        wnEfficientyTank = gson.fromJson(AllLines, WnEfficientyTank.class);
        System.out.println("wnEfficientyTank" + wnEfficientyTank);
        
        //transform list to hashMap for easy treatement
        //HashMap<String, DataWnEfficientyTank> hMapWnEfficientyTankHashMap = new HashMap<String, DataWnEfficientyTank>();
        for (DataWnEfficientyTank dataWnEfficientyTank : wnEfficientyTank.getData()) {

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    for (final ClusterEntity clusterEntity : clusterEntities) {
      Long clusterId = clusterEntity.getClusterId();
      String desiredStackVersion = clusterEntity.getDesiredStackVersion();


      Map<String, String> clusterInfo =
        gson.<Map<String, String>>fromJson(desiredStackVersion, Map.class);


      String stackName = clusterInfo.get("stackName");
      String stackVersion = clusterInfo.get("stackVersion");


      List<ClusterServiceEntity> clusterServiceEntities = clusterServiceDAO.findAll();

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          configEntityPK.setTag(value.trim());
          ClusterConfigEntity configEntity = clusterDAO.findConfig(configEntityPK);
          if (configEntity != null) {
            String configData = configEntity.getData();
            if (configData != null) {
              Map<String, String> properties = gson.<Map<String, String>>fromJson(configData, Map.class);
              if (properties != null && !properties.isEmpty()) {
                String decommissionedNodes = properties.get("datanodes");
                if (decommissionedNodes != null) {
                  String[] nodes = decommissionedNodes.split(",");
                  if (nodes.length > 0) {

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  public static <T> T getJsonFormString(String json, Class<T> type) {
    GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.serializeNulls();
    Gson gson = gsonBuilder.create();
    return (T) gson.fromJson(json, type);
  }


  @Override
  public void setUp() throws Exception {
    super.setUp();

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      Type type = new TypeToken<Map<String, Map<String, List<MetricDefinition>>>>(){}.getType();
      
      Gson gson = new Gson();


      try {
        map = gson.fromJson(new FileReader(svc.getMetricsFile()), type);
    
        svc.setMetrics(map);
        
      } catch (Exception e) {
        LOG.error ("Could not read the metrics file", e);

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        URLStreamProvider streamProvider = new URLStreamProvider(
            LOOKUP_CONNECTION_TIMEOUT, LOOKUP_READ_TIMEOUT,
            null, null, null);
        
        LOG.info("Loading latest URL info from " + sourceUri);
        latestUrlMap = gson.fromJson(new InputStreamReader(
            streamProvider.readFrom(sourceUri)), type);
      } else {
        File jsonFile = null;
        if (sourceUri.charAt(0) == '.') {
          jsonFile = new File(stackRepoFolder, sourceUri);

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          jsonFile = new File(sourceUri);
        }
        
        if (jsonFile.exists()) {
          LOG.info("Loading latest URL info from " + jsonFile);
          latestUrlMap = gson.fromJson(new FileReader(jsonFile), type);
        }
      }
    } catch (Exception e) {
      LOG.error("Could not load the URI " + sourceUri + " (" + e.getMessage() + ")");
      throw e;

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