private InputStream OpenMultiplePartsWithOffset(FileSystem fs, Path pt, long offset)
throws IOException {
RemoteIterator<LocatedFileStatus> rit = fs.listFiles(pt, false);
Vector<FSDataInputStream> fileHandleList = new Vector<FSDataInputStream>();
while (rit.hasNext()) {
Path path = rit.next().getPath();
String filename =
path.toString().substring(path.getParent().toString().length(), path.toString().length());
if (filename.startsWith("/part-")) {
long filesize = fs.getFileStatus(path).getLen();
if (offset < filesize) {
FSDataInputStream handle = fs.open(path);
if (offset > 0) {
handle.seek(offset);
}
fileHandleList.add(handle);
}
offset -= filesize;
}
}
if (fileHandleList.size() == 1) return fileHandleList.get(0);
else if (fileHandleList.size() > 1) {
Enumeration<FSDataInputStream> enu = fileHandleList.elements();
return new SequenceInputStream(enu);
} else {
System.err.println("Error, no source file loaded. run genSeedDataset.sh fisrt!");
return null;
}
}
@Test
public void testListStatus() throws Exception {
final String hPrefix = "test/hadoop";
final String[] dirs = {
hPrefix + "/a",
hPrefix + "/b",
hPrefix + "/c",
hPrefix + "/1",
hPrefix + "/#@#@",
hPrefix + "/&*#$#$@234"
};
ArrayList<Path> testDirs = new ArrayList<Path>();
for (String d : dirs) {
testDirs.add(qualifiedPath(d, fc2));
}
Assert.assertFalse(exists(fc1, testDirs.get(0)));
for (Path path : testDirs) {
fc1.mkdir(path, FsPermission.getDefault(), true);
}
// test listStatus that returns an array of FileStatus
FileStatus[] paths = fc1.util().listStatus(qualifiedPath("test", fc1));
Assert.assertEquals(1, paths.length);
Assert.assertEquals(qualifiedPath(hPrefix, fc1), paths[0].getPath());
paths = fc1.util().listStatus(qualifiedPath(hPrefix, fc1));
Assert.assertEquals(6, paths.length);
for (int i = 0; i < dirs.length; i++) {
boolean found = false;
for (int j = 0; j < paths.length; j++) {
if (qualifiedPath(dirs[i], fc1).equals(paths[j].getPath())) {
found = true;
}
}
Assert.assertTrue(dirs[i] + " not found", found);
}
paths = fc1.util().listStatus(qualifiedPath(dirs[0], fc1));
Assert.assertEquals(0, paths.length);
// test listStatus that returns an iterator of FileStatus
RemoteIterator<FileStatus> pathsItor = fc1.listStatus(qualifiedPath("test", fc1));
Assert.assertEquals(qualifiedPath(hPrefix, fc1), pathsItor.next().getPath());
Assert.assertFalse(pathsItor.hasNext());
pathsItor = fc1.listStatus(qualifiedPath(hPrefix, fc1));
int dirLen = 0;
for (; pathsItor.hasNext(); dirLen++) {
boolean found = false;
FileStatus stat = pathsItor.next();
for (int j = 0; j < dirs.length; j++) {
if (qualifiedPath(dirs[j], fc1).equals(stat.getPath())) {
found = true;
break;
}
}
Assert.assertTrue(stat.getPath() + " not found", found);
}
Assert.assertEquals(6, dirLen);
pathsItor = fc1.listStatus(qualifiedPath(dirs[0], fc1));
Assert.assertFalse(pathsItor.hasNext());
}