package com.atlassian.webdriver.waiter.webdriver.function.element;
   
   import com.atlassian.webdriver.waiter.webdriver.retriever.WebElementRetriever;
   import com.atlassian.webdriver.waiter.webdriver.function.ConditionFunction;
   import org.openqa.selenium.NoSuchElementException;
   import org.openqa.selenium.StaleElementReferenceException;
   import org.openqa.selenium.WebDriver;
   
   /**
   * @since 2.1.0
   */
  public class ExistsFunction implements ConditionFunction
  {
      private final WebElementRetriever elementRetriever;
  
      public ExistsFunction(final WebElementRetriever elementRetriever)
      {
          this.elementRetriever = elementRetriever;
      }
  
      public Boolean apply(WebDriver from)
      {
          try
          {
              // Make any call on the element.
              elementRetriever.retrieveElement().isDisplayed();
              return true;
          }
          catch (NoSuchElementException e)
          {
              return false;
          }
          catch (StaleElementReferenceException e)
          {
              return false;
          }
      }
  }