code: /*
   * Copyright 2012-2018 Chronicle Map Contributors
   *
   * 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 net.openhft.chronicle.hash.impl.util;
  
  /**
   * Inspired by Guava's Throwables
   */
  public final class Throwables {
  
      private Throwables() {
      }
  
      public static RuntimeException propagate(Throwable t) {
          // Avoid calling Objects.requireNonNull(), StackOverflowError-sensitive
          if (t == null)
              throw new NullPointerException();
          if (t instanceof Error)
              throw (Error) t;
          if (t instanceof RuntimeException)
              throw (RuntimeException) t;
          throw new RuntimeException(t);
      }
  
      public static <T extends Throwable> T propagateNotWrapping(
              Throwable t, Class<T> notWrappingThrowableType) throws T {
          Objects.requireNonNull(t);
          Objects.requireNonNull(notWrappingThrowableType);
          if (t instanceof Error)
              throw (Error) t;
          if (t instanceof RuntimeException)
              throw (RuntimeException) t;
          if (notWrappingThrowableType.isInstance(t))
              throw notWrappingThrowableType.cast(t);
          throw new RuntimeException(t);
      }
  
      public static Throwable returnOrSuppress(Throwable thrown, Throwable t) {
          if (thrown == null) {
              return t;
          } else {
              if (t != null)
                  thrown.addSuppressed(t);
              return thrown;
          }
      }
  }
  