/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.hadoop.chukwa.hicc;
  
  
  import java.net.*;
  import java.nio.charset.Charset;
  import java.text.ParseException;
  import java.io.*;
  
  import org.json.simple.JSONArray;
  import org.json.simple.JSONObject;
  import org.json.simple.JSONValue;
  import org.apache.log4j.Logger;
  import org.apache.hadoop.chukwa.util.ExceptionUtil;
  
  public class JSONLoader {
    public JSONArray jsonData;
    private static Logger log = Logger.getLogger(JSONLoader.class);
  
    static public String getContents(String source) {
      // ...checks on aFile are elided
      StringBuffer contents = new StringBuffer();
  
      try {
        // use buffering, reading one line at a time
        // FileReader always assumes default encoding is OK!
        URL yahoo = new URL(source);
        BufferedReader in = new BufferedReader(new InputStreamReader(yahoo
            .openStream(), Charset.forName("UTF-8")));
  
        String inputLine;
  
        while ((inputLine = in.readLine()) != null) {
          contents.append(inputLine);
          contents.append(System.getProperty("line.separator"));
        }
        in.close();
      } catch (IOException ex) {
        ex.printStackTrace();
      }
  
      return contents.toString();
    }
  
    public JSONLoader(String source) {
      String buffer = getContents(source);
      try {
        JSONObject rows = (JSONObject) JSONValue.parse(buffer);
        jsonData = (JSONArray) JSONValue.parse(rows.get("rows").toString());
      } catch (Exception e) {
        log.debug(ExceptionUtil.getStackTrace(e)); 
      }
    }
  
    public String getTS(int i) {
      String ts = null;
      try {
        ts = ((JSONObject) jsonData.get(i)).get("ts").toString();
      } catch (Exception e) {
        log.debug(ExceptionUtil.getStackTrace(e)); 
      }
      return ts;
    }
  
    public String getTags(int i) {
      String tags = null;
      try {
        tags = ((JSONObject) jsonData.get(i)).get("tags")
            .toString();
      } catch (Exception e) {
        log.debug(ExceptionUtil.getStackTrace(e)); 
      }
      return tags;
    }
  
    public String getValue(int i) {
      String value = null;
      try {
        value = ((JSONObject) jsonData.get(i)).get("value")
            .toString();
      } catch (Exception e) {
        log.debug(ExceptionUtil.getStackTrace(e)); 
     }
     return value;
   }
 
   public int length() {
     return jsonData.size();
   }
 }