content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.fuse;
  
  import com.google.common.base.Preconditions;
  
  import java.io.Closeable;
  import java.io.IOException;
  import java.io.OutputStream;
  import javax.annotation.concurrent.NotThreadSafe;
  
  /**
   * Convenience class to encapsulate output stream
   * and its information (path, id) for create alluxio file.
   * @param <T> the concrete output stream subclass
   */
  @NotThreadSafe
  public final class CreateFileEntry<T extends OutputStream>
      implements Closeable {
    private final long mId;
    private final T mOut;
    // Path is likely to be changed when fuse rename() is called
    private String mPath;
  
    /**
     * Constructs a new {@link CreateFileEntry} for an Alluxio file.
     *
     * @param id the id of the file
     * @param path the path of the file
     * @param out the output stream of the file
     */
    public CreateFileEntry(long id, String path, T out) {
      Preconditions.checkArgument(id != -1 && !path.isEmpty());
      Preconditions.checkArgument(out != null);
      mId = id;
      mOut = out;
      mPath = path;
    }
  
    /**
     * @return the id of the file
     */
    public long getId() {
      return mId;
    }
  
    /**
     * @return the path of the file
     */
    public String getPath() {
      return mPath;
    }
  
    /**
     * Gets the opened output stream for this open file entry. The value returned can be {@code null}
     * if the file is not open for writing.
     *
     * @return an opened input stream for the open alluxio file, or null
     */
    public T getOut() {
      return mOut;
    }
  
    /**
     * Sets the path of the file. The file path can be changed
     * if fuse rename() is called.
     *
     * @param path the new path of the file
     */
    public void setPath(String path) {
      mPath = path;
    }
  
    /**
     * Closes the underlying open streams.
     */
    @Override
    public void close() throws IOException {
      if (mOut != null) {
        mOut.close();
      }
    }
  }
  