package com.mobimvp.cliques.service;
import com.android.volley.AuthFailureError;
import com.android.volley.DefaultRetryPolicy;
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.JsonSyntaxException;
import java.io.UnsupportedEncodingException;
import java.util.Map;
/**
* Volley adapter for JSON requests that will be parsed into Java objects by Gson.
*/
public class GsonRequest<T> extends Request<T> {
public static final int DEFAULT_TIMEOUT_MS = 6 * 1000;
public static final int DEFAULT_MAX_RETRIES = 3;
public static final float DEFAULT_BACKOFF_MULT = 1f;
private final Gson gson = new Gson();
private final Class<T> clazz;
private final Listener<T> listener;
private Map<String, String> headers = null;
public GsonRequest(String url, Class<T> clazz, Listener<T> listener, ErrorListener errorListener) {
super(Method.GET, url, errorListener);
this.clazz = clazz;
this.listener = listener;
setRetryPolicy();
}
/**
* Make a GET request and return a parsed object from JSON.
*
* @param url URL of the request to make
* @param clazz Relevant class object, for Gson's reflection
* @param headers Map of request headers
*/
public GsonRequest(String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener) {
super(Method.GET, url, errorListener);
this.clazz = clazz;
this.headers = headers;
this.listener = listener;
setRetryPolicy();
}
public GsonRequest(int method, String url, Class<T> clazz, Map<String, String> headers,
Listener<T> listener, ErrorListener errorListener) {
super(method, url, errorListener);
this.clazz = clazz;
this.headers = headers;
this.listener = listener;
setRetryPolicy();
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return headers != null ? headers : super.getHeaders();
}
private void setRetryPolicy() {
setRetryPolicy(new DefaultRetryPolicy(DEFAULT_TIMEOUT_MS, DEFAULT_MAX_RETRIES, DEFAULT_BACKOFF_MULT));
}
@Override
public Priority getPriority() {
return Priority.HIGH;
}
@Override
protected void deliverResponse(T response) {
listener.onResponse(response);
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
try {
String format = HttpHeaderParser.parseCharset(response.headers);
String json = new String(response.data, format);
return Response.success(
gson.fromJson(json, clazz), HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JsonSyntaxException e) {
return Response.error(new ParseError(e));
}
}
}