eu.the4thfloor.volleyextended.toolbox.JsonObjectRequest.java Source code

Introduction

Here is the source code for eu.the4thfloor.volleyextended.toolbox.JsonObjectRequest.java

Source

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * 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 eu.the4thfloor.volleyextended.toolbox;

import eu.the4thfloor.volleyextended.NetworkResponse;
import eu.the4thfloor.volleyextended.ParseError;
import eu.the4thfloor.volleyextended.Response;
import eu.the4thfloor.volleyextended.Response.ErrorListener;
import eu.the4thfloor.volleyextended.Response.Listener;

import org.json.JSONException;
import org.json.JSONObject;

import java.io.UnsupportedEncodingException;

/**
 * A request for retrieving a {@link JSONObject} response body at a given URL, allowing for an
 * optional {@link JSONObject} to be passed in as part of the request body.
 */
public class JsonObjectRequest extends JsonRequest<JSONObject> {

    /**
     * Creates a new request.
     * 
     * @param method
     *          the HTTP method to use
     * @param url
     *          URL to fetch the JSON from
     * @param jsonRequest
     *          A {@link JSONObject} to post with the request. Null is allowed and
     *          indicates no parameters will be posted along with request.
     * @param listener
     *          Listener to receive the JSON response
     * @param errorListener
     *          Error listener, or null to ignore errors.
     */
    public JsonObjectRequest(final int method, final String url, final JSONObject jsonRequest,
            final Listener<JSONObject> listener, final ErrorListener<JSONObject> errorListener) {

        super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener, errorListener);
    }

    /**
     * Constructor which defaults to <code>GET</code> if <code>jsonRequest</code> is <code>null</code>, <code>POST</code> otherwise.
     * 
     * @see #JsonObjectRequest(int, String, JSONObject, Listener, ErrorListener)
     */
    public JsonObjectRequest(final String url, final JSONObject jsonRequest, final Listener<JSONObject> listener,
            final ErrorListener<JSONObject> errorListener) {

        this(jsonRequest == null ? Method.GET : Method.POST, url, jsonRequest, listener, errorListener);
    }

    @Override
    protected Response<JSONObject> parseNetworkResponse(final NetworkResponse response) {

        try {
            final String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
            return Response.success(new JSONObject(jsonString), HttpHeaderParser.parseCacheHeaders(response));
        } catch (final UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (final JSONException je) {
            return Response.error(new ParseError(je));
        }
    }
}