public static String toJsonString(final List<XAttr> xAttrs) throws IOException {
final List<String> names = Lists.newArrayListWithCapacity(xAttrs.size());
for (XAttr xAttr : xAttrs) {
names.add(XAttrHelper.getPrefixName(xAttr));
}
String ret = JSON.toString(names);
final Map<String, Object> finalMap = new TreeMap<String, Object>();
finalMap.put("XAttrNames", ret);
return JSON.toString(finalMap);
}
/** Convert an Object[] to a List of LocatedBlock. */
private static List<LocatedBlock> toLocatedBlockList(final Object[] objects) throws IOException {
if (objects == null) {
return null;
} else if (objects.length == 0) {
return Collections.emptyList();
} else {
final List<LocatedBlock> list = new ArrayList<LocatedBlock>(objects.length);
for (int i = 0; i < objects.length; i++) {
list.add(toLocatedBlock((Map<?, ?>) objects[i]));
}
return list;
}
}
public static List<String> toXAttrNames(final Map<?, ?> json) throws IOException {
if (json == null) {
return null;
}
final String namesInJson = (String) json.get("XAttrNames");
final Object[] xattrs = (Object[]) JSON.parse(namesInJson);
final List<String> names = Lists.newArrayListWithCapacity(json.keySet().size());
for (int i = 0; i < xattrs.length; i++) {
names.add((String) (xattrs[i]));
}
return names;
}
/** Convert a Json map to a AclStatus object. */
public static AclStatus toAclStatus(final Map<?, ?> json) {
if (json == null) {
return null;
}
final Map<?, ?> m = (Map<?, ?>) json.get(AclStatus.class.getSimpleName());
AclStatus.Builder aclStatusBuilder = new AclStatus.Builder();
aclStatusBuilder.owner((String) m.get("owner"));
aclStatusBuilder.group((String) m.get("group"));
aclStatusBuilder.stickyBit((Boolean) m.get("stickyBit"));
final Object[] entries = (Object[]) m.get("entries");
List<AclEntry> aclEntryList = new ArrayList<AclEntry>();
for (int i = 0; i < entries.length; i++) {
AclEntry aclEntry = AclEntry.parseAclEntry((String) entries[i], true);
aclEntryList.add(aclEntry);
}
aclStatusBuilder.addEntries(aclEntryList);
return aclStatusBuilder.build();
}