HADOOP-14384. Reduce the visibility of FileSystem.newFSDataOutputStreamBuilder before the API becomes stable. (lei)

(cherry picked from commit 149b903be30e2b973691c30ee02f0d5b53ca0abc)

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FSDataOutputStreamBuilder.java

@@ -18,6 +18,8 @@
 package org.apache.hadoop.fs;
 
 import com.google.common.base.Preconditions;
+import org.apache.hadoop.classification.InterfaceAudience;
+import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.fs.Options.ChecksumOpt;
 import org.apache.hadoop.fs.permission.FsPermission;
 import org.apache.hadoop.util.Progressable;
@@ -29,7 +31,9 @@ import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_
 import static org.apache.hadoop.fs.CommonConfigurationKeysPublic.IO_FILE_BUFFER_SIZE_KEY;
 
 /** Base of specific file system FSDataOutputStreamBuilder. */
-public class FSDataOutputStreamBuilder{
+@InterfaceAudience.Private
+@InterfaceStability.Unstable
+public class FSDataOutputStreamBuilder {
   private Path path = null;
   private FsPermission permission = null;
   private Integer bufferSize;
@@ -41,7 +45,7 @@ public class FSDataOutputStreamBuilder{
 
   private final FileSystem fs;
 
-  public FSDataOutputStreamBuilder(FileSystem fileSystem, Path p) {
+  protected FSDataOutputStreamBuilder(FileSystem fileSystem, Path p) {
     fs = fileSystem;
     path = p;
   }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java

@@ -4128,8 +4128,12 @@ public abstract class FileSystem extends Configured implements Closeable {
    * Create a new FSDataOutputStreamBuilder for the file with path.
    * @param path file path
    * @return a FSDataOutputStreamBuilder object to build the file
+   *
+   * HADOOP-14384. Temporarily reduce the visibility of method before the
+   * builder interface becomes stable.
    */
-  public FSDataOutputStreamBuilder newFSDataOutputStreamBuilder(Path path) {
+  @InterfaceAudience.Private
+  protected FSDataOutputStreamBuilder newFSDataOutputStreamBuilder(Path path) {
     return new FSDataOutputStreamBuilder(this, path);
   }
 }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FilterFileSystem.java

@@ -667,7 +667,7 @@ public class FilterFileSystem extends FileSystem {
   }
 
   @Override
-  public FSDataOutputStreamBuilder newFSDataOutputStreamBuilder(Path path) {
+  protected FSDataOutputStreamBuilder newFSDataOutputStreamBuilder(Path path) {
     return fs.newFSDataOutputStreamBuilder(path);
   }
 }