commons-io/src/site/xdoc/upgradeto1_3.xml at patch-1 · ileontiuc/commons-io · GitHub

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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
<?xml version="1.0"?>
<!--
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.
-->
<document>
 <properties>
  <title>Upgrade from 1.2 to 1.3</title>
  <author email="dev@commons.apache.org">Commons Documentation Team</author>
 </properties>
<body>

<section name="Upgrade">
<p>
These are the release notes and advice for upgrading Commons-IO from
version 1.2 to version 1.3.
<source>
Commons IO is a package of Java utility classes for java.io's hierarchy.
Classes in this package are considered to be so standard and of such high
reuse as to justify existence in java.io.

Commons IO contains utility classes, stream implementations, file filters,
and endian transformation classes.


Compatibility with 1.2
----------------------
Binary compatible - Yes

Source compatible - Yes

Semantic compatible - Yes
  Check the bug fixes section for semantic bug fixes


Deprecations from 1.2
---------------------
- WildcardFilter deprecated, replaced by WildcardFileFilter
  - old class only accepted files, thus had a confusing dual purpose

- FileSystemUtils.freeSpace deprecated, replaced by freeSpaceKb
  - freeSpace returns a result that varies by operating system and
    thus isn't that useful
  - freeSpaceKb returns much better and more consistent results
  - freeSpaceKb existed in v1.2, so this is a gentle cutover


Bug fixes from 1.2
------------------
- LineIterator now implements Iterator
  - It was always supposed to...

- FileSystemUtils.freeSpace/freeSpaceKb [IO-83]
  - These should now work on AIX and HP-UX

- FileSystemUtils.freeSpace/freeSpaceKb [IO-90]
  - Avoid infinite looping in Windows
  - Catch more errors with nice messages

- FileSystemUtils.freeSpace [IO-91]
  - This is now documented not to work on SunOS 5

- FileSystemUtils [IO-93]
  - Fixed resource leak leading to 'Too many open files' error
  - Previously did not destroy Process instances (as JDK Javadoc is so poor)
  - http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4801027

- FileUtils.touch [IO-100]
  - The touch method previously gave no indication when the file could not
    be touched successfully (such as due to access restrictions) - it now
    throws an IOException if the last modified date cannot be changed

- FileCleaner
  - This now handles the situation where an error occurs when deleting the file

- IOUtils.copy [IO-84]
  - Copy methods could return inaccurate byte/char count for large streams
  - The copy(InputStream, OutputStream) method now returns -1 if the count is greater than an int
  - The copy(Reader, Writer) method now throws now returns -1 if the count is greater than an int
  - Added a new copyLarge(InputStream, OutputStream) method that returns a long
  - Added a new copyLarge(Reader, Writer) method that returns a long

- CountingInputStream/CountingOutputStream [IO-84]
  - Methods were declared as int thus the count was innacurate for large streams
  - new long based methods getByteCount()/resetByteCount() added
  - existing methods changed to throw an exception if the count is greater than an int

- FileBasedTestCase
  - Fixed bug in compare content methods identified by GNU classpath

- EndianUtils.writeSwappedLong(byte[], int) [IO-101]
  - An int overrun in the bit shifting when it should have been a long

- EndianUtils.writeSwappedLong(InputStream) [IO-102]
  - The return of input.read(byte[]) was not being checked to ensure all 8 bytes were read

Enhancements from 1.2
---------------------
- DirectoryWalker [IO-86]
  - New class designed for subclassing to walk through a set of files.
    DirectoryWalker provides the walk of the directories, filtering of
    directories and files, and cancellation support. The subclass must provide
    the specific behaviour, such as text searching or image processing.

- IOCase
  - New class/enumeration for case-sensitivity control

- FilenameUtils
  - New methods to handle case-sensitivity
  - wildcardMatch - new method that has IOCase as a parameter
  - equals - new method that has IOCase as a parameter

- FileUtils [IO-108] - new default encoding methods for:
  - readFileToString(File)
  - readLines(File)
  - lineIterator(File)
  - writeStringToFile(File, String)
  - writeLines(File, Collection)
  - writeLines(File, Collection, String)

- FileUtils.openOutputStream  [IO-107]
  - new method to open a FileOutputStream, creating parent directories if required
- FileUtils.touch
- FileUtils.copyURLToFile
- FileUtils.writeStringToFile
- FileUtils.writeByteArrayToFile
- FileUtils.writeLines
  - enhanced to create parent directories if required
- FileUtils.openInputStream  [IO-107]
  - new method to open a FileInputStream, providing better error messages than the JDK

- FileUtils.isFileOlder
  - new methods to check if a file is older (i.e. isFileOlder()) - counterparts
    to the existing isFileNewer() methods.

- FileUtils.checksum, FileUtils.checksumCRC32
  - new methods to create a checksum of a file

- FileUtils.copyFileToDirectory  [IO-104]
  - new variant that optionally retains the file date

- FileDeleteStrategy
- FileCleaner    [IO-56,IO-70]
  - FileDeleteStrategy is a strategy for handling file deletion
  - This can be used as a calback in FileCleaner
  - Together these allow FileCleaner to do a forceDelete to kill directories

- FileCleaner.exitWhenFinished [IO-99]
  - A new method that allows the internal cleaner thread to be cleanly terminated

- WildcardFileFilter
  - Replacement for WildcardFilter
  - Accepts both files and directories
  - Ability to control case-sensitivity

- NameFileFilter
  - Ability to control case-sensitivity

- FileFileFilter
  - New IOFileFilter implementation
  - Accepts files where File.isFile() is true
  - In other words it filters out directories
  - Singleton instance provided (FILE)

- CanReadFileFilter
  - New IOFileFilter implementation
  - Accepts files where File.canRead() is true
  - Singleton instances provided (CAN_READ/CANNOT_READ/READ_ONLY)

- CanWriteFileFilter
  - New IOFileFilter implementation
  - Accepts files where File.canWrite() is true
  - Singleton instances provided (CAN_WRITE/CANNOT_WRITE)

- HiddenFileFilter
  - New IOFileFilter implementation
  - Accepts files where File.isHidden() is true
  - Singleton instances provided (HIDDEN/VISIBLE)

- EmptyFileFilter
  - New IOFileFilter implementation
  - Accepts files or directories that are empty
  - Singleton instances provided (EMPTY/NOT_EMPTY)

- TrueFileFilter/FalseFileFilter/DirectoryFileFilter
  - New singleton instance constants (TRUE/FALSE/DIRECTORY)
  - The new constants are more JDK 1.5 friendly with regards to static imports
    (whereas if everything uses INSTANCE, then they just clash)
  - The old INSTANCE constants are still present and have not been deprecated

- FileFilterUtils.sizeRangeFileFilter
  - new sizeRangeFileFilter(long minimumSize, long maximumSize) method which
    creates a filter that accepts files within the specified size range.

- FileFilterUtils.makeDirectoryOnly/makeFileOnly
  - two new methods that decorate a file filter to make it apply to
    directories only or files only

- NullWriter
  - New writer that acts as a sink for all data, as per /dev/null

- NullInputStream
  - New input stream that emulates a stream of a specified size

- NullReader
  - New reader that emulates a reader of a specified size

- ByteArrayOutputStream  [IO-97]
  - Performance enhancements

</source>
</p>
</section>

</body>
</document>