/** Convert a HdfsFileStatus object to a Json string. */
public static String toJsonString(final HdfsFileStatus status, boolean includeType) {
if (status == null) {
return null;
}
final Map<String, Object> m = new TreeMap<String, Object>();
m.put("pathSuffix", status.getLocalName());
m.put("type", PathType.valueOf(status));
if (status.isSymlink()) {
m.put("symlink", status.getSymlink());
}
m.put("length", status.getLen());
m.put("owner", status.getOwner());
m.put("group", status.getGroup());
FsPermission perm = status.getPermission();
m.put("permission", toString(perm));
if (perm.getAclBit()) {
m.put("aclBit", true);
}
if (perm.getEncryptedBit()) {
m.put("encBit", true);
}
m.put("accessTime", status.getAccessTime());
m.put("modificationTime", status.getModificationTime());
m.put("blockSize", status.getBlockSize());
m.put("replication", status.getReplication());
m.put("fileId", status.getFileId());
m.put("childrenNum", status.getChildrenNum());
m.put("storagePolicy", status.getStoragePolicy());
return includeType ? toJsonString(FileStatus.class, m) : JSON.toString(m);
}
/** Convert a Json map to a HdfsFileStatus object. */
public static HdfsFileStatus toFileStatus(final Map<?, ?> json, boolean includesType) {
if (json == null) {
return null;
}
final Map<?, ?> m =
includesType ? (Map<?, ?>) json.get(FileStatus.class.getSimpleName()) : json;
final String localName = (String) m.get("pathSuffix");
final PathType type = PathType.valueOf((String) m.get("type"));
final byte[] symlink =
type != PathType.SYMLINK ? null : DFSUtil.string2Bytes((String) m.get("symlink"));
final long len = (Long) m.get("length");
final String owner = (String) m.get("owner");
final String group = (String) m.get("group");
final FsPermission permission =
toFsPermission(
(String) m.get("permission"), (Boolean) m.get("aclBit"), (Boolean) m.get("encBit"));
final long aTime = (Long) m.get("accessTime");
final long mTime = (Long) m.get("modificationTime");
final long blockSize = (Long) m.get("blockSize");
final short replication = (short) (long) (Long) m.get("replication");
final long fileId =
m.containsKey("fileId") ? (Long) m.get("fileId") : INodeId.GRANDFATHER_INODE_ID;
Long childrenNumLong = (Long) m.get("childrenNum");
final int childrenNum = (childrenNumLong == null) ? -1 : childrenNumLong.intValue();
final byte storagePolicy =
m.containsKey("storagePolicy")
? (byte) (long) (Long) m.get("storagePolicy")
: BlockStoragePolicySuite.ID_UNSPECIFIED;
return new HdfsFileStatus(
len,
type == PathType.DIRECTORY,
replication,
blockSize,
mTime,
aTime,
permission,
owner,
group,
symlink,
DFSUtil.string2Bytes(localName),
fileId,
childrenNum,
null,
storagePolicy);
}