package us.codecraft.webmagic.selector;
   
   import com.alibaba.fastjson.JSON;
   import us.codecraft.xsoup.XTokenQueue;
   
   import java.util.List;
   
   /**
    * parse json
   * @author code4crafter@gmail.com
   * @since 0.5.0
   */
  public class Json extends PlainText {
  
      public Json(List<String> strings) {
          super(strings);
      }
  
      public Json(String text) {
          super(text);
      }
  
      /**
       * remove padding for JSONP
       * @param padding padding
       * @return json after padding removed
       */
      public Json removePadding(String padding) {
          String text = getFirstSourceText();
          XTokenQueue tokenQueue = new XTokenQueue(text);
          tokenQueue.consumeWhitespace();
          tokenQueue.consume(padding);
          tokenQueue.consumeWhitespace();
          String chompBalanced = tokenQueue.chompBalancedNotInQuotes('(', ')');
          return new Json(chompBalanced);
      }
  
      public <T> T toObject(Class<T> clazz) {
          if (getFirstSourceText() == null) {
              return null;
          }
          return JSON.parseObject(getFirstSourceText(), clazz);
      }
  
      public <T> List<T> toList(Class<T> clazz) {
          if (getFirstSourceText() == null) {
              return null;
          }
          return JSON.parseArray(getFirstSourceText(), clazz);
      }
  
      @Override
      public Selectable jsonPath(String jsonPath) {
          JsonPathSelector jsonPathSelector = new JsonPathSelector(jsonPath);
          return selectList(jsonPathSelector,getSourceTexts());
      }
  }