Github user joshelser commented on a diff in the pull request:
https://github.com/apache/accumulo/pull/90#discussion_r59564604
--- Diff:
core/src/main/java/org/apache/accumulo/core/file/streams/PositionedOutputs.java
---
@@ -0,0 +1,55 @@
+/*
+ * 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.accumulo.core.file.streams;
+
+import java.io.FilterOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+import org.apache.hadoop.fs.FSDataOutputStream;
+
+public class PositionedOutputs {
+ public static PositionedOutputStream wrap(final OutputStream fout) {
+ if (fout instanceof FSDataOutputStream) {
+ return new PositionedOutputStream(fout) {
+ @Override
+ public long position() throws IOException {
+ return ((FSDataOutputStream) fout).getPos();
+ }
+ };
+ } else if (fout instanceof PositionedOutput) {
+ return new PositionedOutputStream(fout) {
+ @Override
+ public long position() throws IOException {
+ return ((PositionedOutput) fout).position();
+ }
+ };
+ } else {
+ return new PositionedOutputStream(fout) {
+ @Override
+ public long position() throws IOException {
+ throw new UnsupportedOperationException("Underlying stream does
not support position()");
+ }
+ };
+ }
+ }
+
+ public static abstract class PositionedOutputStream extends
FilterOutputStream implements PositionedOutput {
--- End diff --
Oh, right you are. I thought callers of `PositionedOutputs.wrap` would be
using it, but apparently not. As long as `PositionedOutputs.wrap` is returning
`PositionedOutputStream`, I think this should be separated. If you want to
change `PositionedOutputs.wrap` to just return a `FilterOutputStream`, we can
make this `private static abstract ...`.
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