1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.volley.toolbox;
18
19import com.android.volley.NetworkResponse;
20import com.android.volley.ParseError;
21import com.android.volley.Response;
22import com.android.volley.Response.ErrorListener;
23import com.android.volley.Response.Listener;
24
25import org.json.JSONArray;
26import org.json.JSONException;
27
28import java.io.UnsupportedEncodingException;
29
30/**
31 * A request for retrieving a {@link JSONArray} response body at a given URL.
32 */
33public class JsonArrayRequest extends JsonRequest<JSONArray> {
34
35    /**
36     * Creates a new request.
37     * @param url URL to fetch the JSON from
38     * @param listener Listener to receive the JSON response
39     * @param errorListener Error listener, or null to ignore errors.
40     */
41    public JsonArrayRequest(String url, Listener<JSONArray> listener, ErrorListener errorListener) {
42        super(Method.GET, url, null, listener, errorListener);
43    }
44
45    /**
46     * Creates a new request.
47     * @param method the HTTP method to use
48     * @param url URL to fetch the JSON from
49     * @param jsonRequest A {@link JSONArray} to post with the request. Null is allowed and
50     *   indicates no parameters will be posted along with request.
51     * @param listener Listener to receive the JSON response
52     * @param errorListener Error listener, or null to ignore errors.
53     */
54    public JsonArrayRequest(int method, String url, JSONArray jsonRequest,
55                            Listener<JSONArray> listener, ErrorListener errorListener) {
56        super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
57                errorListener);
58    }
59
60    @Override
61    protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
62        try {
63            String jsonString = new String(response.data,
64                    HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
65            return Response.success(new JSONArray(jsonString),
66                    HttpHeaderParser.parseCacheHeaders(response));
67        } catch (UnsupportedEncodingException e) {
68            return Response.error(new ParseError(e));
69        } catch (JSONException je) {
70            return Response.error(new ParseError(je));
71        }
72    }
73}
74