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.cassandra.io;
  
  import java.io.IOError;
  import java.nio.file.Path;
  
  import org.apache.cassandra.io.util.File;
  
  public abstract class FSError extends IOError
  {
      final String message;
      public final String path;
  
      public FSError(Throwable cause, File path)
      {
          this(null, cause, path);
      }
  
      public FSError(Throwable cause, Path path)
      {
          this(null, cause, path);
      }
  
      public FSError(String message, Throwable cause, File path)
      {
          super(cause);
          this.message = message;
          this.path = path.toString();
      }
  
      public FSError(String message, Throwable cause, Path path)
      {
          super(cause);
          this.message = message;
          this.path = path.toString();
      }
  
      /**
       * Unwraps the Throwable cause chain looking for an FSError instance
       * @param top the top-level Throwable to unwrap
       * @return FSError if found any, null otherwise
       */
      public static FSError findNested(Throwable top)
      {
          for (Throwable t = top; t != null; t = t.getCause())
          {
              if (t instanceof FSError)
                  return (FSError) t;
          }
  
          return null;
      }
  
      @Override
      public String getMessage()
      {
          return message == null ? super.getMessage() : message;
      }
  
      @Override
      public String toString()
      {
          return getClass().getSimpleName() + (message != null ? ' ' + message : "") + (path != null ? " in " + path : "");
      }
  }
  