zhuzhurk commented on a change in pull request #9950: [FLINK-14464][runtime]
Introduce the AbstractUserClassPathJobGraphRetriever
URL: https://github.com/apache/flink/pull/9950#discussion_r339283097
##########
File path: flink-core/src/main/java/org/apache/flink/util/FileUtils.java
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@@ -525,6 +540,102 @@ public static Path expandDirectory(Path file, Path
targetDirectory) throws IOExc
return new Path(targetDirectory, rootDir);
}
+ /**
+ * List the directory {@code directory} recursively and return the
files that satisfies the {@code fileFilter}.
+ *
+ * @param directory the directory to be listed
+ * @param fileFilter a file filter
+ * @return a collection of {@code File}s
+ *
+ * @throws IOException if an I/O error occurs while listing the files
in the given directory
+ */
+ public static Collection<File> listFilesInPath(@Nonnull final File
directory, @Nonnull final Predicate<File> fileFilter) throws IOException {
Review comment:
I think we do not need the @Nonnull annotation since a param is supposed to
be non-null by default.
Instead, we should do null checks before using these params.
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