2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
35 import java.util.Arrays;
36 import java.util.Collections;
37 import java.util.List;
39 public class FileRoutines {
40 protected static final int FILE_COPY_BUFFER_SIZE = 65536;
42 protected FileRoutines() {
48 public static void copyFile(File aSourceFile, File aDestinationFile) throws IOException {
49 BufferedInputStream inputStream;
50 BufferedOutputStream outputStream;
52 byte[] buffer = new byte[FILE_COPY_BUFFER_SIZE];
54 inputStream = new BufferedInputStream(new FileInputStream(aSourceFile));
56 File directory = new File(aDestinationFile.getParent());
57 if (directory != null && !directory.exists()) {
60 outputStream = new BufferedOutputStream(new FileOutputStream(aDestinationFile), 8192);
63 nrBytesRead = inputStream.read(buffer);
65 outputStream.write(buffer, 0, nrBytesRead);
67 while (nrBytesRead >= 0);
79 * Copy a directory recursively
81 public static void copyDirectory(File aSourceDirectory, File aDestinationDirectory) throws IOException {
85 File[] files = aSourceDirectory.listFiles();
87 if (!aDestinationDirectory.exists())
88 aDestinationDirectory.mkdirs();
90 for (i = 0; i < files.length; i++) {
91 sourceFile = files[i];
92 destinationFile = new File(aDestinationDirectory, sourceFile.getName());
93 if (sourceFile.isDirectory()) {
94 if (!destinationFile.exists())
95 destinationFile.mkdir();
96 copyDirectory(sourceFile, destinationFile);
99 copyFile(sourceFile, destinationFile);
105 * Copy a file or directory. If the source is a file and the destination
106 * a directory, the file is copied using the same file name into the\
109 * @param aSource the source file
110 * @param aDestination the destination file
112 public static void copy(File aSource, File aDestination) throws IOException {
113 if (aSource.isDirectory()) {
114 copyDirectory(aSource, aDestination);
116 else if (aDestination.isDirectory()) {
117 copyFile(aSource, new File(aDestination, aSource.getName()));
120 copyFile(aSource, aDestination);
125 * Copy the contents of an {@link InputStream} to a {@link File}
127 public static void copy(InputStream aSource, File aDestination) throws IOException {
128 BufferedOutputStream outputStream =
129 new BufferedOutputStream(new FileOutputStream(aDestination), 8192);
132 byte[] buf = new byte[8 * 1024];
134 while ((read = aSource.read(buf)) != -1) {
135 outputStream.write(buf, 0, read);
139 outputStream.close();
143 * Moves a {@link File} to a new location
145 public static void move(File aSource, File aDestination) throws IOException {
146 aDestination.getParentFile().mkdirs();
147 if (!aSource.renameTo(aDestination)) {
148 byte[] buffer = new byte[16384];
149 FileInputStream inputStream = new FileInputStream(aSource);
150 FileOutputStream outputStream = new FileOutputStream(aDestination);
152 int count = inputStream.read(buffer);
154 outputStream.write(buffer, 0, count);
155 count = inputStream.read(buffer);
159 outputStream.close();
166 public static class RegExpFileFilter implements FilenameFilter {
167 private RE expression;
169 public RegExpFileFilter(String anExpression) {
171 expression = new RE(anExpression);
173 catch (Throwable t) {
174 throw new RuntimeException(t.getMessage());
178 public boolean accept(File aDir, String aName) {
179 return expression.isMatch(aName) && !new File(aDir, aName).isDirectory();
183 public static class DirectoryFilter implements FilenameFilter {
184 public DirectoryFilter() {
187 public boolean accept(File aDir, String aName) {
188 return new File(aDir, aName).isDirectory();
193 * Return all files in a directory
195 * @param aDirectory The directory to list
196 * @param aFilter the filter to apply to files
197 * @return a <code>List</code> of filenames of type <code>String</code>
199 public static List getDirectoryContentsAsList(File aDirectory, FilenameFilter aFilter) {
200 Object[] contents = aDirectory.list(aFilter);
202 if (contents == null) {
203 return Collections.EMPTY_LIST;
206 return Arrays.asList(contents);
210 * Return the extension of a path. (e.g. <code>getExtension("example.txt")</code> will
211 * return <code>"txt"</code>
213 public static String getExtension(String aPath) {
214 int position = aPath.lastIndexOf('.');
216 return aPath.substring(position + 1);
221 public static boolean isAbsolutePath(String aPath) {
222 return new File(aPath).isAbsolute();
226 * Transforms an absolute or relative path into an absolute
229 * @param aBasePath The base path to use for relative paths
230 * @param aPath The path to transform
231 * @return An absolute representation of the supplied path
233 public static File getAbsoluteOrRelativeFile(File aBasePath, String aPath) {
234 if (isAbsolutePath(aPath)) {
235 return new File(aPath);
238 return new File(aBasePath, aPath);
242 * Reads the content of a file into an array of bytes
244 public static byte[] readFileIntoByteArray(String fileName) throws IOException {
245 InputStream input = new FileInputStream(fileName);
246 ByteArrayOutputStream result = new ByteArrayOutputStream();
248 IORoutines.copyStream(input, result);
250 return result.toByteArray();
254 * Creates all parent directories of a file if they do not exist
256 public static void createParentDirectories(File aFile) {
257 if (aFile.getParentFile() != null && !aFile.getParentFile().exists()) {
258 aFile.getParentFile().mkdirs();