ca.jackymok.tomatoes.toolbox.GsonRequest.java Source code

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Here is the source code for ca.jackymok.tomatoes.toolbox.GsonRequest.java

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/**
 * Copyright 2013 Ognyan Bankov
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ca.jackymok.tomatoes.toolbox;

import java.io.UnsupportedEncodingException;
import java.text.SimpleDateFormat;
import java.util.Date;

import android.renderscript.Type;
import android.text.format.DateFormat;

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;
import com.google.gson.JsonSyntaxException;

public class GsonRequest<T> extends Request<T> {
    private final Gson mGson;
    private final Class<T> mClazz;
    private final Listener<T> mListener;

    public GsonRequest(int method, String url, Class<T> clazz, Listener<T> listener, ErrorListener errorListener) {
        super(Method.GET, url, errorListener);
        this.mClazz = clazz;
        this.mListener = listener;

        //Create Gson qith custom Date parsing
        GsonBuilder gsonBuilder = new GsonBuilder();
        gsonBuilder.registerTypeAdapter(Date.class, new JsonDeserializer<Date>() {
            final java.text.DateFormat df = new SimpleDateFormat("yyyy-MM-dd");

            @Override
            public Date deserialize(JsonElement arg0, java.lang.reflect.Type arg1, JsonDeserializationContext arg2)
                    throws JsonParseException {
                try {
                    return df.parse(arg0.getAsString());
                } catch (final java.text.ParseException e) {
                    e.printStackTrace();
                    return null;
                }
            }
        });
        mGson = gsonBuilder.create();
    }

    public GsonRequest(int method, String url, Class<T> clazz, Listener<T> listener, ErrorListener errorListener,
            Gson gson) {
        super(Method.GET, url, errorListener);
        this.mClazz = clazz;
        this.mListener = listener;
        mGson = gson;
    }

    @Override
    protected void deliverResponse(T response) {
        mListener.onResponse(response);
    }

    @Override
    protected Response<T> parseNetworkResponse(NetworkResponse response) {
        try {
            String json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            return Response.success(mGson.fromJson(json, mClazz), HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JsonSyntaxException e) {
            return Response.error(new ParseError(e));
        }
    }
}