Github user LosD commented on a diff in the pull request:
https://github.com/apache/metamodel/pull/78#discussion_r47408779
--- Diff:
hadoop/src/main/java/org/apache/metamodel/util/HdfsDirectoryInputStream.java ---
@@ -0,0 +1,74 @@
+/**
+ * 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.metamodel.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Arrays;
+
+import org.apache.hadoop.fs.FileStatus;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.PathFilter;
+
+/**
+ * An {@link InputStream} that represents all the data found in a
directory on
+ * HDFS. This {@link InputStream} is used by {@link HdfsResource#read()}
when
+ * pointed to a directory.
+ */
+class HdfsDirectoryInputStream extends
AbstractDirectoryInputStream<FileStatus> {
+
+ private final Path _hadoopPath;
+ private final FileSystem _fs;
+
+ public HdfsDirectoryInputStream(final Path hadoopPath, final
FileSystem fs) {
+ _hadoopPath = hadoopPath;
+ _fs = fs;
+ FileStatus[] fileStatuses;
+ try {
+ fileStatuses = _fs.listStatus(_hadoopPath, new PathFilter() {
+ @Override
+ public boolean accept(final Path path) {
+ try {
+ return _fs.isFile(path);
+ } catch (IOException e) {
+ return false;
+ }
+ }
+ });
+ // Natural ordering is the URL
+ Arrays.sort(fileStatuses);
+ } catch (IOException e) {
+ fileStatuses = new FileStatus[0];
+ }
+ _files = fileStatuses;
+ }
+
+ @Override
+ public InputStream openStream(final int index) throws IOException {
+ final Path nextPath = _files[index].getPath();
+ return _fs.open(nextPath);
+ }
+
+ @Override
+ public void close() throws IOException {
+ super.close();
+ FileHelper.safeClose(_fs);
+ }
+}
--- End diff --
Missing EOL
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