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/*
 * Copyright (C) 2006 The Guava Authors
 *
 * 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.
 */

package com.google.common.util.concurrent;

import static com.google.common.base.Preconditions.checkNotNull;

import com.google.common.annotations.Beta;
import com.google.common.annotations.GwtIncompatible;
import com.google.errorprone.annotations.CanIgnoreReturnValue;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;

/**
 * A TimeLimiter implementation which actually does not attempt to limit time at all. This may be
 * desirable to use in some unit tests. More importantly, attempting to debug a call which is
 * time-limited would be extremely annoying, so this gives you a time-limiter you can easily swap in
 * for your real time-limiter while you're debugging.
 *
 * @author Kevin Bourrillion
 * @author Jens Nyman
 * @since 1.0
 */
@Beta
@CanIgnoreReturnValue
@GwtIncompatible
public final class FakeTimeLimiter implements TimeLimiter {
  @Override
  public  T newProxy(
      T target, Class interfaceType, long timeoutDuration, TimeUnit timeoutUnit) {
    checkNotNull(target);
    checkNotNull(interfaceType);
    checkNotNull(timeoutUnit);
    return target; // ha ha
  }

  @Override
  public  T callWithTimeout(Callable callable, long timeoutDuration, TimeUnit timeoutUnit)
      throws ExecutionException {
    checkNotNull(callable);
    checkNotNull(timeoutUnit);
    try {
      return callable.call();
    } catch (RuntimeException e) {
      throw new UncheckedExecutionException(e);
    } catch (Exception e) {
      throw new ExecutionException(e);
    } catch (Error e) {
      throw new ExecutionError(e);
    } catch (Throwable e) {
      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
      // Exception, so we'll treat it like an Exception.
      throw new ExecutionException(e);
    }
  }

  @Override
  public  T callUninterruptiblyWithTimeout(
      Callable callable, long timeoutDuration, TimeUnit timeoutUnit) throws ExecutionException {
    return callWithTimeout(callable, timeoutDuration, timeoutUnit);
  }

  @Override
  public void runWithTimeout(Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
    checkNotNull(runnable);
    checkNotNull(timeoutUnit);
    try {
      runnable.run();
    } catch (RuntimeException e) {
      throw new UncheckedExecutionException(e);
    } catch (Error e) {
      throw new ExecutionError(e);
    } catch (Throwable e) {
      // It's a non-Error, non-Exception Throwable. Such classes are usually intended to extend
      // Exception, so we'll treat it like a RuntimeException.
      throw new UncheckedExecutionException(e);
    }
  }

  @Override
  public void runUninterruptiblyWithTimeout(
      Runnable runnable, long timeoutDuration, TimeUnit timeoutUnit) {
    runWithTimeout(runnable, timeoutDuration, timeoutUnit);
  }
}