com.video_browser_thesis.json.JSONParser.java Source code

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Here is the source code for com.video_browser_thesis.json.JSONParser.java

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/*
 * Copyright (C) 2012 Anshul Saini
 *
 * 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.video_browser_thesis.json;

import java.io.BufferedReader;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.json.JSONException;
import org.json.JSONObject;

import android.util.Log;

/**
 * Creates a JSON object from the data retrieved from the provided url
 * @author Anshul Saini
 * @version 5
 *
 * @param  is        
 * @param  jObj    JSON Object which is finally created from the JSON string 
 * @param  json    JSON String which is used to create JSON Object    
 * @return         
 * @see            
 */
public class JSONParser {

    static InputStream is = null;
    static JSONObject jObj = null;
    static String json = "";

    /**
     * Makes the HTTP request, parses the JSON String, creates and JSON Object 
     * @param httpClient   
     * @param httpPost
     * @param httpResponse
     * @param httpEntity
     * @param reader
     * @param sb
     * @param line
     * @return jObj
     * @see JSONObject
     */
    public JSONObject getJSONFromUrl(String url) {

        DefaultHttpClient httpClient;
        HttpPost httpPost;
        HttpResponse httpResponse;
        HttpEntity httpEntity;
        BufferedReader reader;
        StringBuilder sb;
        String line;

        try {
            httpClient = new DefaultHttpClient();
            httpPost = new HttpPost(url);

            httpResponse = httpClient.execute(httpPost);
            httpEntity = httpResponse.getEntity();
            is = httpEntity.getContent();

        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

        try {
            reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
            sb = new StringBuilder();
            line = null;
            while ((line = reader.readLine()) != null) {
                sb.append(line + "\n");
            }
            is.close();
            json = sb.toString();
        } catch (Exception e) {
            Log.e("Buffer Error", "Error converting result " + e.toString());
        }

        try {
            jObj = new JSONObject(json);
        } catch (JSONException e) {
            Log.e("JSON Parser", "Error parsing data " + e.toString());
        }

        return jObj;
    }
}