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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License"); you
 * may not use this file except in compliance with the License. You
 * may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * permissions and limitations under the License. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.util.concurrent;

import java.util.concurrent.TimeUnit;

import com.gemstone.gemfire.CancelCriterion;
import com.gemstone.gemfire.internal.i18n.LocalizedStrings;

/**
 * This is a type of {@link StoppableReentrantLock} that does not allow
 * recursion
 * 
 */
public class StoppableNonReentrantLock extends StoppableReentrantLock
{
  /**
   * Creates an instance.
   * @param stopper the cancellation object
   */
  public StoppableNonReentrantLock(CancelCriterion stopper) {
    super(stopper);
  }

  /**
   * Creates an instance with the
   * given fairness policy.
   *
   * @param fair true if this lock should use a fair ordering policy
   * @param stopper the cancellation object
   */
  public StoppableNonReentrantLock(boolean fair, CancelCriterion stopper) {
    super(fair, stopper);
  }

  /**
   * @throws IllegalStateException if reentry is detected
   */
  private void checkForRentry() {
    if (isHeldByCurrentThread()) {
      throw new IllegalStateException(LocalizedStrings.StoppableNonReentrantLock_LOCK_REENTRY_IS_NOT_ALLOWED.toLocalizedString());
    }
  }
  
  /**
   * @throws IllegalStateException if the lock is already held by the current thread
   */
  @Override
  public void lock() {
    checkForRentry();
    super.lock();
  }

  /**
   * @throws IllegalStateException if the lock is already held by the current thread
   */
  @Override
  public void lockInterruptibly() throws InterruptedException {
    checkForRentry();
    super.lockInterruptibly();
  }
  
  /**
   * @throws IllegalStateException if the lock is already held by the current thread
   */
  @Override
  public boolean tryLock() {
    checkForRentry();
    return super.tryLock();
  }

  /**
   * @throws IllegalStateException
   *           if the lock is already held by the current thread
   */
  @Override
  public boolean tryLock(long time, TimeUnit unit) throws InterruptedException {
    checkForRentry();
    return super.tryLock(time, unit);
  }
}