content: /*
   * 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.
   */
  
  package org.apache.bookkeeper.common.util;
  
  import java.io.IOException;
  import java.util.concurrent.CompletableFuture;
  import java.util.concurrent.CompletionException;
  import java.util.concurrent.ExecutionException;
  import org.apache.bookkeeper.common.concurrent.FutureUtils;
  import org.apache.bookkeeper.common.exceptions.ObjectClosedException;
  
  /**
   * Utils for exceptions.
   */
  public final class ExceptionUtils {
  
      private ExceptionUtils() {
      }
  
      /**
       * Execute the callable {@code callable}.
       *
       * <p>If the object {@code componentName} is already closed ({@code isClosed}), it will be
       * failed immediately without calling {@code callable}.
       *
       * @param componentName the component name
       * @param isClosed      predicate to check whether the component is closed or not.
       * @param callable      the callable to execute
       * @param <T>           result type
       * @return the future represents the result.
       */
      public static <T> CompletableFuture<T> callAndHandleClosedAsync(String componentName,
                                                                      boolean isClosed,
                                                                      CompletableRunnable<T> callable) {
          CompletableFuture<T> future = FutureUtils.createFuture();
          if (isClosed) {
              future.completeExceptionally(new ObjectClosedException(componentName));
          } else {
              callable.run(future);
          }
          return future;
      }
  
      /**
       * Convert a {@link Throwable} to an {@link IOException}.
       *
       * @param cause reason to fail
       * @return a converted {@link IOException}.
       */
      public static IOException toIOException(Throwable cause) {
          if (cause instanceof IOException) {
              return (IOException) cause;
          } else if (cause instanceof ExecutionException || cause instanceof CompletionException) {
              return toIOException(cause.getCause());
          } else {
              return new IOException(cause);
          }
      }
  
  }
  