Parsing data with gson from google places

Question

I started using the Google Places api by calling the following url

https://maps.googleapis.com/maps/api/place/textsearch/json?query=restaurants+in+Sydney&sensor=true&key=AddYourOwnKeyHere

I found a post here on stackoverflow that showed the the basic structure of classes I need to to parse the json with gson. Here is what I have so far.

public class GoogleMapper
{
  @SerializedName("debug_info")
  private List<String> debug_info;

  @SerializedName("html_attributions")
  private List<String> html_attributions;

  @SerializedName("next_page_token")
  private String next_page_token;

  @SerializedName("results")
  private List<Results> results;

  @SerializedName("status")
  private String status;
}


public class Results
{
    @SerializedName("formatted_address")
    private String              formatted_address;

    @SerializedName("icon")
    private String              icon;

    @SerializedName("id")
    private String              id;

    @SerializedName("name")
    private String              name;

    @SerializedName("rating")
    private Double              rating;

    @SerializedName("reference")
    private String              reference;

    @SerializedName("types")
    private List<String>    types;
}

And here is the main method

public static void main(String[] args)
{
  Places p = new Places();
  try
  {
    String page = p.getPage();

    Gson gson = new GsonBuilder().serializeNulls().create();

    JsonParser parser = new JsonParser(); 
    JsonObject o = (JsonObject)parser.parse(page);

    String json = gson.toJson(o);
    GoogleMapper mapper = gson.fromJson(json, GoogleMapper.class);
  }
  catch (Exception e)
  {
    e.printStackTrace();
  }
}

When I run the program I get no errors. But how do I get the parsed data printed?

Do you mean printed on console? – giampaolo Nov 18 '13 at 22:29 — giampaolo, Nov 18 '13 at 22:29
@giampaolo yes, I want to know how to access the data. – Arya Nov 19 '13 at 00:45 — Arya, Nov 19 '13 at 00:45

score 2 · Accepted Answer · answered Nov 19 '13 at 07:02

Add getters to your classes (and setters if you want, but are not needed)

public class GoogleMapper {
   @SerializedName("debug_info")
   private List<String> debug_info;

   @SerializedName("html_attributions")
   private List<String> html_attributions;

   @SerializedName("next_page_token")
   private String next_page_token;

   @SerializedName("results")
   private List<Results> results;

   public List<String> getDebugInfo() {
      return debug_info;
   }

   public List<String> getHtmlAttributions() {
      return html_attributions;
   }

   public String getNextPageToken() {
      return next_page_token;
   }

   public List<Results> getResults() {
      return results;
   }

   public String getStatus() {
      return status;
   }

   @SerializedName("status")
   private String status;
}

public class Results {
   public String getFormattedAddress() {
      return formatted_address;
   }

   public String getIcon() {
      return icon;
   }

   public String getId() {
      return id;
   }

   public String getName() {
      return name;
   }

   public Double getRating() {
      return rating;
   }

   public String getReference() {
      return reference;
   }

   public List<String> getTypes() {
      return types;
   }

   @SerializedName("formatted_address")
   private String formatted_address;

   @SerializedName("icon")
   private String icon;

   @SerializedName("id")
   private String id;

   @SerializedName("name")
   private String name;

   @SerializedName("rating")
   private Double rating;

   @SerializedName("reference")
   private String reference;

   @SerializedName("types")
   private List<String> types;
}

and then do like this in your main:

  Gson gson = new GsonBuilder().serializeNulls().create();

  GoogleMapper mapper = gson.fromJson(page, GoogleMapper.class);

  List<Results> results = mapper.getResults();
  if(results != null){
    for(Results r : results){
     System.out.println("Fetched name: " + r.getName());
    }
  }

Notes:

I could not test the code completely since you posted an url and not the corresponding JSON string. It would be better to edit the question posting the JSON
You do deserialization twice, you can pass directly the page string to the Gson instance
Results is plural, I think that Result is a better name, but I left as you wrote

Parsing data with gson from google places

1 Answers1

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