public static boolean isFolderRelevant(
File f, PmsConfiguration configuration, Set<String> ignoreFiles) {
if (f.isDirectory() && configuration.isHideEmptyFolders()) {
File[] children = f.listFiles();
/**
* listFiles() returns null if "this abstract pathname does not denote a directory, or if an
* I/O error occurs". in this case (since we've already confirmed that it's a directory), this
* seems to mean the directory is non-readable
* http://www.ps3mediaserver.org/forum/viewtopic.php?f=6&t=15135
* http://stackoverflow.com/questions/3228147/retrieving-the-underlying-error-when-file-listfiles-return-null
*/
if (children == null) {
LOGGER.warn("Can't list files in non-readable directory: {}", f.getAbsolutePath());
} else {
for (File child : children) {
if (ignoreFiles.contains(child.getAbsolutePath())) {
continue;
}
if (child.isFile()) {
if (FormatFactory.getAssociatedFormat(child.getName()) != null
|| isFileRelevant(child, configuration)) {
return true;
}
} else {
if (isFolderRelevant(child, configuration, ignoreFiles)) {
return true;
}
}
}
}
}
return false;
}
// XXX dir.canWrite() has issues on Windows, so verify it directly:
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6203387
public static boolean isDirectoryWritable(File dir) {
boolean isWritable = false;
if (dir != null) {
// new File("").isDirectory() is false, even though getAbsolutePath() returns the right path.
// this resolves it
dir = dir.getAbsoluteFile();
if (dir.isDirectory()) {
File file =
new File(
dir,
String.format(
"pms_directory_write_test_%d_%d.tmp",
System.currentTimeMillis(), Thread.currentThread().getId()));
try {
if (file.createNewFile()) {
if (isFileWritable(file)) {
isWritable = true;
}
if (!file.delete()) {
LOGGER.warn("Can't delete temporary test file: {}", file.getAbsolutePath());
}
}
} catch (IOException | SecurityException ioe) {
}
}
}
return isWritable;
}
// this is called from a static initialiser, where errors aren't clearly reported,
// so do everything possible to return a valid reponse, even if the parameters
// aren't sane
public static FileLocation getFileLocation(
String customPath, String defaultDirectory, String defaultBasename) {
File customFile = null;
File directory = null;
File file = null;
if (isBlank(defaultBasename)) {
// shouldn't get here
defaultBasename = DEFAULT_BASENAME;
}
if (defaultDirectory == null) {
defaultDirectory = ""; // current directory
}
if (customPath != null) {
customFile = new File(customPath).getAbsoluteFile();
}
if (customFile != null) {
if (customFile.exists()) {
if (customFile.isDirectory()) {
directory = customFile;
file = new File(customFile, defaultBasename).getAbsoluteFile();
} else {
directory = customFile.getParentFile();
file = customFile;
}
} else {
File parentDirectoryFile = customFile.getParentFile();
if (parentDirectoryFile != null && parentDirectoryFile.exists()) {
// parent directory exists: the file can be created
directory = parentDirectoryFile;
file = customFile;
}
}
}
if (directory == null || file == null) {
directory = new File(defaultDirectory).getAbsoluteFile();
file = new File(directory, defaultBasename).getAbsoluteFile();
}
return new FileLocation(directory, file);
}
// XXX dir.canRead() has issues on Windows, so verify it directly:
// http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6203387
public static boolean isDirectoryReadable(File dir) {
boolean isReadable = false;
if (dir != null) {
// new File("").isDirectory() is false, even though getAbsolutePath() returns the right path.
// this resolves it
dir = dir.getAbsoluteFile();
if (dir.isDirectory()) {
try {
File[] files = dir.listFiles(); // null if an I/O error occurs
isReadable = files != null;
} catch (SecurityException se) {
}
}
}
return isReadable;
}