package com.atlassian.webdriver.rule;
   
   import org.junit.runners.model.Statement;
   
   import static com.google.common.base.Preconditions.checkNotNull;
   
   /**
    * For testing rules we need to be able invoke statements created by them and ignoring the resulting errors.
    *
   * @since 2.1
   */
  public final class SafeStatementInvoker
  {
      private boolean success = true;
      private Throwable error = null;
  
      private final Statement statement;
  
      public SafeStatementInvoker(Statement statement)
      {
          this.statement = checkNotNull(statement);
      }
  
      public void invokeSafely()
      {
          try
          {
              statement.evaluate();
          }
          catch (Throwable throwable)
          {
              this.error = throwable;
              this.success = false;
          }
      }
  
      public boolean isSuccess()
      {
          return success;
      }
  
      public Throwable getError()
      {
          return error;
      }
  }