zhuzhurk commented on a change in pull request #9950: [FLINK-14464][runtime]
Introduce the AbstractUserClassPathJobGraphRetriever
URL: https://github.com/apache/flink/pull/9950#discussion_r339283383
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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 {
+ if (!Files.exists(directory.toPath())) {
+ throw new IllegalArgumentException(String.format("The
directory %s dose not exist.", directory));
+ }
+ if (!Files.isDirectory(directory.toPath())) {
+ throw new IllegalArgumentException(String.format("The
%s is not a directory.", directory));
+ }
+
+ final FilterFileVisitor filterFileVisitor = new
FilterFileVisitor(fileFilter);
+
+ Files.walkFileTree(
+ directory.toPath(),
+ EnumSet.of(FileVisitOption.FOLLOW_LINKS),
+ Integer.MAX_VALUE,
+ filterFileVisitor
+ );
+ return filterFileVisitor.getFiles().isEmpty() ?
Collections.emptyList() : filterFileVisitor.getFiles();
+ }
+
+ /**
+ * Convert a collection of {@code File}s to a collection of relative
path to the working dir.
+ *
+ * @param files a collection of files needed to be relatived
+ * @return a collection of relative {@code File}s
+ */
+ public static Collection<File> relativizeToWorkingDir(@Nonnull final
Collection<File> files) {
Review comment:
I think `@Nonnull` is not needed but a `checkNotNull` is needed.
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