using System.Threading;

namespace Lucene.Net.Util
{

	using ThreadFilter = com.carrotsearch.randomizedtesting.ThreadFilter;

	/*
	 * Licensed to the Apache Software Foundation (ASF) under one or more
	 * contributor license agreements.  See the NOTICE file distributed with
	 * this work for additional information regarding copyright ownership.
	 * The ASF licenses this file to You 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.
	 */

	/// <summary>
	/// Last minute patches.
	/// TODO: remove when integrated in system filters in rr.
	/// </summary>
	public class QuickPatchThreadsFilter : ThreadFilter
	{
	  internal static readonly bool IsJ9;

	  static QuickPatchThreadsFilter()
	  {
		IsJ9 = System.getProperty("java.vm.info", "<?>").contains("IBM J9");
	  }

	  public override bool Reject(Thread t)
	  {
		if (IsJ9)
		{
		  StackTraceElement[] stack = t.StackTrace;
		  if (stack.Length > 0 && stack[stack.Length - 1].ClassName.Equals("java.util.Timer$TimerImpl"))
		  {
			return true; // LUCENE-4736
		  }
		}
		return false;
	  }
	}

}