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package com.factual.driver;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import org.json.JSONException;
import org.json.JSONObject;

import com.google.common.collect.Maps;

/**
 * Represents a Factual Diffs response
 * 
 * @author brandon
 * 
 */
public class DiffsResponse extends Response implements DiffsCallback {

  private String json = "";
  private final List> data = new ArrayList>();

  public DiffsResponse() {
    super(null);
  }

  protected static Map parseItem(String jsonObj) throws JSONException {
    JSONObject jsonItem = new JSONObject(jsonObj);
    Iterator iter = jsonItem.keys();
    Map itemMap = Maps.newHashMap();
    while (iter.hasNext()) {
      String key = iter.next().toString();
      itemMap.put(key, jsonItem.getString(key));
    }
    return itemMap;
  }

  /**
   * Get diffs response as a list of diffs, where each diff is represented as a
   * map
   * 
   * @return list of diffs returned from this query.
   */
  public List> getData() {
    return data;
  }

  @Override
  public String getJson() {
    return json;
  }

  @Override
  public void onDiff(String line) {
    json += line;
    json += System.getProperty("line.separator");
    try {
      data.add(parseItem(line));
    } catch (JSONException e) {
      e.printStackTrace();
    }
  }

}