self.philbrown.javaQuery.JSONResponseHandler.java Source code

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Here is the source code for self.philbrown.javaQuery.JSONResponseHandler.java

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/*
 * Copyright 2013 Phil Brown
 *
 * 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 self.philbrown.javaQuery;

import java.io.IOException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.StatusLine;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.ResponseHandler;
import org.apache.http.util.EntityUtils;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * Handle an HttpResponse as a {@link JSONObject} or {@link JSONArray}. 
 * @author Phil Brown
 */
public class JSONResponseHandler implements ResponseHandler<Object> {

    @Override
    public Object handleResponse(HttpResponse response) throws ClientProtocolException, IOException {
        StatusLine statusLine = response.getStatusLine();
        if (statusLine.getStatusCode() >= 300) {
            Log.e("javaQuery",
                    "HTTP Response Error " + statusLine.getStatusCode() + ":" + statusLine.getReasonPhrase());
            return null;
        }

        HttpEntity entity = response.getEntity();
        if (entity == null)
            return null;

        String json = null;
        try {
            json = EntityUtils.toString(entity);
            if (json.startsWith("{")) {
                return new JSONObject(json);
            } else {
                return new JSONArray(json);
            }

        } catch (ParseException e) {
            throw e;
        } catch (JSONException e) {
            throw new IOException("Received malformed JSON");

        }
    }

}