1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* 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.drill.exec.util;
import org.apache.drill.exec.store.dfs.DrillFileSystem;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import java.io.IOException;
import java.util.List;
/**
* In Drill file system all directories and files that start with dot or underscore is ignored.
* This helper class that delegates all work to list directory and file statuses to {@link org.apache.drill.exec.util.FileSystemUtil} class,
* only adding Drill file system filter first.
*/
public class DrillFileSystemUtil {
/**
* Path filter that skips all files and folders that start with dot or underscore.
*/
public static final PathFilter DRILL_SYSTEM_FILTER = path ->
!path.getName().startsWith(DrillFileSystem.UNDERSCORE_PREFIX) && !path.getName().startsWith(DrillFileSystem.DOT_PREFIX);
/**
* Returns statuses of all directories present in given path applying custom filters if present.
* Directories that start with dot or underscore are skipped.
* Will also include nested directories if recursive flag is set to true.
*
* @param fs current file system
* @param path path to directory
* @param recursive true if nested directories should be included
* @param filters list of custom filters (optional)
* @return list of matching directory statuses
*/
public static List<FileStatus> listDirectories(final FileSystem fs, Path path, boolean recursive, PathFilter... filters) throws IOException {
return FileSystemUtil.listDirectories(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
/**
* Returns statuses of all directories present in given path applying custom filters if present.
* Directories that start with dot or underscore are skipped.
* Will include nested directories if recursive flag is set to true.
* Will ignore all exceptions during listing if any.
*
* @param fs current file system
* @param path path to directory
* @param recursive true if nested directories should be included
* @param filters list of custom filters (optional)
* @return list of matching directory statuses
*/
public static List<FileStatus> listDirectoriesSafe(final FileSystem fs, Path path, boolean recursive, PathFilter... filters) {
return FileSystemUtil.listDirectoriesSafe(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
/**
* Returns statuses of all files present in given path applying custom filters if present.
* Files and nested directories that start with dot or underscore are skipped.
* Will also include files from nested directories if recursive flag is set to true.
*
* @param fs current file system
* @param path path to file or directory
* @param recursive true if files in nested directories should be included
* @param filters list of custom filters (optional)
* @return list of matching file statuses
*/
public static List<FileStatus> listFiles(final FileSystem fs, Path path, boolean recursive, PathFilter... filters) throws IOException {
return FileSystemUtil.listFiles(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
/**
* Returns statuses of all files present in given path applying custom filters if present.
* Files and nested directories that start with dot or underscore are skipped.
* Will include files from nested directories if recursive flag is set to true.
* Will ignore all exceptions during listing if any.
*
* @param fs current file system
* @param path path to file or directory
* @param recursive true if files in nested directories should be included
* @param filters list of custom filters (optional)
* @return list of matching file statuses
*/
public static List<FileStatus> listFilesSafe(final FileSystem fs, Path path, boolean recursive, PathFilter... filters) {
return FileSystemUtil.listFilesSafe(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
/**
* Returns statuses of all directories and files present in given path applying custom filters if present.
* Directories and files that start with dot or underscore are skipped.
* Will also include nested directories and their files if recursive flag is set to true.
*
* @param fs current file system
* @param path path to file or directory
* @param recursive true if nested directories and their files should be included
* @param filters list of custom filters (optional)
* @return list of matching directory and file statuses
*/
public static List<FileStatus> listAll(FileSystem fs, Path path, boolean recursive, PathFilter... filters) throws IOException {
return FileSystemUtil.listAll(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
/**
* Returns statuses of all directories and files present in given path applying custom filters if present.
* Directories and files that start with dot or underscore are skipped.
* Will include nested directories and their files if recursive flag is set to true.
* Will ignore all exceptions during listing if any.
*
* @param fs current file system
* @param path path to file or directory
* @param recursive true if nested directories and their files should be included
* @param filters list of custom filters (optional)
* @return list of matching directory and file statuses
*/
public static List<FileStatus> listAllSafe(FileSystem fs, Path path, boolean recursive, PathFilter... filters) {
return FileSystemUtil.listAllSafe(fs, path, recursive, FileSystemUtil.mergeFilters(DRILL_SYSTEM_FILTER, filters));
}
}
|
