package com.atlassian.webdriver.waiter.webdriver.function.field;
   
   import com.atlassian.webdriver.waiter.webdriver.retriever.WebElementFieldRetriever;
   import com.atlassian.webdriver.waiter.webdriver.function.ConditionFunction;
   import org.openqa.selenium.WebDriver;
   
   /**
    * @since 2.1.0
    */
  public class IsEqualFunction implements ConditionFunction
  {
      private final WebElementFieldRetriever retriever;
      private final String value;
  
      public IsEqualFunction(WebElementFieldRetriever retriever, String value)
      {
          this.retriever = retriever;
          this.value = value;
      }
  
      public Boolean apply(WebDriver from)
      {
          String fieldValue = retriever.retrieveField();
  
          if (fieldValue == null && value == null)
          {
              return true;
          }
          else if(fieldValue != null)
          {
              return fieldValue.equals(value);
          }
  
          return false;
      }
  }