import javax.resource.spi.work.WorkRejectedException; //导入依赖的package包/类
/**
 * Do first checks for work starting methods
 * @param work to check
 * @param startTimeout to check
 * @param execContext to check
 * @throws WorkException in case of check don't pass
 */
public void doFirstChecks(Work work, long startTimeout, ExecutionContext execContext) throws WorkException
{
   if (isShutdown())
      throw new WorkRejectedException(bundle.workmanagerShutdown());

   if (work == null)
      throw new WorkRejectedException(bundle.workIsNull());

   if (startTimeout < 0)
      throw new WorkRejectedException(bundle.startTimeoutIsNegative(startTimeout));

   checkAndVerifyWork(work, execContext);
}
 

import javax.resource.spi.work.WorkRejectedException; //导入依赖的package包/类
/**
 * Check and verify work before submitting.
 * @param work the work instance
 * @param executionContext any execution context that is passed by apadater
 * @throws WorkException if any exception occurs
 */
private void checkAndVerifyWork(Work work, ExecutionContext executionContext) throws WorkException
{
   if (specCompliant)
   {
      verifyWork(work);
   }

   if (work instanceof WorkContextProvider && executionContext != null)
   {
      //Implements WorkContextProvider and not-null ExecutionContext
      throw new WorkRejectedException(bundle.workExecutionContextMustNullImplementsWorkContextProvider());
   }
}