package org.apidesign.reentrant;

 import java.util.concurrent.locks.ReentrantLock;

 final class NonReentrantLock extends ReentrantLock {

     @Override

     public void lock() {

         if (isHeldByCurrentThread()) {

             throw new IllegalStateException("Attempt to reentrant lock");

         }

         super.lock();

     }

     @Override

     public void lockInterruptibly() throws InterruptedException {

         if (isHeldByCurrentThread()) {

             throw new IllegalStateException("Attempt to reentrant lock");

         }

         super.lockInterruptibly();

     }

 }