src/main/java/com/android/volley/toolbox/JsonArrayRequest.java

/*
 * 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 com.android.volley.toolbox;

import android.support.annotation.Nullable;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import java.io.UnsupportedEncodingException;
import org.json.JSONArray;
import org.json.JSONException;

/** A request for retrieving a {@link JSONArray} response body at a given URL. */
public class JsonArrayRequest extends JsonRequest<JSONArray> {

    /**
     * Creates a new request.
     *
     * @param url URL to fetch the JSON from
     * @param listener Listener to receive the JSON response
     * @param errorListener Error listener, or null to ignore errors.
     */
    public JsonArrayRequest(
            String url, Listener<JSONArray> listener, @Nullable ErrorListener errorListener) {
        super(Method.GET, url, null, listener, errorListener);
    }

    /**
     * Creates a new request.
     *
     * @param method the HTTP method to use
     * @param url URL to fetch the JSON from
     * @param jsonRequest A {@link JSONArray} to post with the request. Null 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 JsonArrayRequest(
            int method,
            String url,
            @Nullable JSONArray jsonRequest,
            Listener<JSONArray> listener,
            @Nullable ErrorListener errorListener) {
        super(
                method,
                url,
                (jsonRequest == null) ? null : jsonRequest.toString(),
                listener,
                errorListener);
    }

    @Override
    protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
        try {
            String jsonString =
                    new String(
                            response.data,
                            HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
            return Response.success(
                    new JSONArray(jsonString), HttpHeaderParser.parseCacheHeaders(response));
        } catch (UnsupportedEncodingException e) {
            return Response.error(new ParseError(e));
        } catch (JSONException je) {
            return Response.error(new ParseError(je));
        }
    }
}