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JMockit is a Java toolkit for automated developer testing. It contains mocking/faking APIs and a code coverage tool, supporting both JUnit and TestNG. The mocking APIs allow all kinds of Java code, without testability restrictions, to be tested in isolation from selected dependencies.

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/*
 * Copyright (c) 2006 JMockit developers
 * This file is subject to the terms of the MIT license (see LICENSE.txt).
 */
package mockit.internal.state;

import java.util.*;
import javax.annotation.*;

import mockit.internal.*;
import mockit.internal.faking.*;
import static mockit.internal.expectations.RecordAndReplayExecution.*;

public final class SavePoint
{
   @Nonnull private final Set previousTransformedClasses;
   @Nonnull private final Map, byte[]> previousRedefinedClasses;
   private final int previousCaptureTransformerCount;
   @Nonnull private final List> previousMockedClasses;
   @Nonnull private final FakeClasses.SavePoint previousFakeClasses;

   public SavePoint() {
      MockFixture mockFixture = TestRun.mockFixture();
      previousTransformedClasses = mockFixture.getTransformedClasses();
      previousRedefinedClasses = mockFixture.getRedefinedClasses();
      previousCaptureTransformerCount = mockFixture.getCaptureTransformerCount();
      previousMockedClasses = mockFixture.getMockedClasses();
      previousFakeClasses = TestRun.getFakeClasses().new SavePoint();
   }

   public synchronized void rollback() {
      RECORD_OR_REPLAY_LOCK.lock();

      try {
         MockFixture mockFixture = TestRun.mockFixture();
         mockFixture.removeCaptureTransformers(previousCaptureTransformerCount);
         mockFixture.restoreTransformedClasses(previousTransformedClasses);
         mockFixture.restoreRedefinedClasses(previousRedefinedClasses);
         mockFixture.removeMockedClasses(previousMockedClasses);
         previousFakeClasses.rollback();
      }
      finally {
         RECORD_OR_REPLAY_LOCK.unlock();
      }
   }
}