java apache fileutil_Java FileUtil.listFiles方法代码示例
import org.apache.hadoop.fs.FileUtil; //導入方法依賴的package包/類
@Override
public boolean delete(Path p, boolean recursive) throws IOException {
if (LOG.isDebugEnabled()) {
LOG.debug(String.format("EFS:delete: %s %b", p, recursive));
}
// The super delete uses the FileUtil.fullyDelete,
// but we cannot rely on that because we need to use the elevated
// operations to remove the files
//
File f = pathToFile(p);
if (!f.exists()) {
//no path, return false "nothing to delete"
return false;
}
else if (f.isFile()) {
return Native.Elevated.deleteFile(p);
}
else if (f.isDirectory()) {
// This is a best-effort attempt. There are race conditions in that
// child files can be created/deleted after we snapped the list.
// No need to protect against that case.
File[] files = FileUtil.listFiles(f);
int childCount = files.length;
if (recursive) {
for(File child:files) {
if (delete(new Path(child.getPath()), recursive)) {
--childCount;
}
}
}
if (childCount == 0) {
return Native.Elevated.deleteDirectory(p);
}
else {
throw new IOException("Directory " + f.toString() + " is not empty");
}
}
else {
// This can happen under race conditions if an external agent
// is messing with the file type between IFs
throw new IOException("Path " + f.toString() +
" exists, but is neither a file nor a directory");
}
}
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