Android Open Source - Instabackground Gson Request

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License

The source code is released under:

Apache License

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Java Source Code

package es.expilu.instabackground.net;
//from  ww w  .  ja va2s  .c o  m
import java.io.UnsupportedEncodingException;
import java.lang.reflect.Type;
import java.util.Date;
import java.util.Map;

import com.android.volley.AuthFailureError;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonDeserializationContext;
import com.google.gson.JsonDeserializer;
import com.google.gson.JsonElement;
import com.google.gson.JsonParseException;

/** Volley adapter for JSON requests that will be parsed into Java objects by Gson. */
public abstract class GsonRequest<T> extends Request<T> {
  
  private final Class<T> mClass;
  private final Map<String, String> mHeaders;
  private final Listener<T> mListener;
  private final Gson mGson;

  /**
   * Constructor 
   */
  public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers, Listener<T> listener, ErrorListener errorListener) {
    super(method, url, errorListener);

    mClass = clazz;
    mHeaders = headers;
    mListener = listener;
    JsonDeserializer<Date> dateDeserializer = new JsonDeserializer<Date>() {
      @Override
      public Date deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
        return json == null ? null : new Date(json.getAsLong());
      }
    };
    mGson = new GsonBuilder().registerTypeAdapter(Date.class, dateDeserializer).create();
  }
  
  /* (non-Javadoc)
   * @see com.android.volley.Request#getHeaders()
   */
  @Override
  public Map<String, String> getHeaders() throws AuthFailureError {
    return mHeaders != null ? mHeaders : super.getHeaders();
  }

  /* (non-Javadoc)
   * @see com.android.volley.Request#parseNetworkResponse(com.android.volley.NetworkResponse)
   */
  @Override
  protected Response<T> parseNetworkResponse(NetworkResponse response) {
    try {
      String json =  new String(response.data, HttpHeaderParser.parseCharset(response.headers));
      return Response.success(mGson.fromJson(json, mClass), HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
      return Response.error(new ParseError(e));
    }
  }

  /* (non-Javadoc)
   * @see com.android.volley.Request#deliverResponse(java.lang.Object)
   */
  @Override
  protected void deliverResponse(T response) {
    mListener.onResponse(response);
  }
  

}

Java Source Code List