content: /**
   * Copyright (c) 2013, Andre Steingress
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
   * following conditions are met:
   *
   * 1.) Redistributions of source code must retain the above copyright notice, this list of conditions and the following
   * disclaimer.
   * 2.) Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
   * disclaimer in the documentation and/or other materials provided with the distribution.
   * 3.) Neither the name of Andre Steingress nor the names of its contributors may be used to endorse or
   * promote products derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
   * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  package org.gcontracts;
  
  import org.gcontracts.util.Validate;
  
  import java.util.TreeMap;
  
  /**
   * <p>
   * A violation tracker is used to keep a list of pre-, post-condition or class-invariant
   * violations in chronological order. This is necessary to evaluate all parts of a pre- or postcondition, and still
   * being able to rethrow assertion errors.
   * </p>
   *
   * @author ast
   */
  public class ViolationTracker {
  
      public static ThreadLocal<ViolationTracker> INSTANCE = new ThreadLocal<ViolationTracker>();
  
      public static void init()  {
          INSTANCE.set(new ViolationTracker());
      }
  
      public static void deinit()  {
          INSTANCE.remove();
      }
  
      public static boolean violationsOccured()  {
          return INSTANCE.get().hasViolations();
      }
  
      public static void rethrowFirst()  {
          throw INSTANCE.get().first();
      }
  
      public static void rethrowLast()  {
          throw INSTANCE.get().last();
      }
  
      private TreeMap<Long, AssertionViolation> violations = new TreeMap<Long, AssertionViolation>();
  
      public void track(final AssertionViolation assertionViolation)  {
          Validate.notNull(assertionViolation);
  
          violations.put(System.nanoTime(), assertionViolation);
      }
  
      public boolean hasViolations()  {
          return violations.size() > 0;
      }
  
      public AssertionViolation first()  {
          return violations.firstEntry().getValue();
      }
  
      public AssertionViolation last()  {
          return violations.lastEntry().getValue();
      }
  }
  