/**
* Construct a JSONObject from a ResourceBundle.
*
* @param baseName The ResourceBundle base name.
* @param locale The Locale to load the ResourceBundle for.
* @throws JSONException If any JSONExceptions are detected.
*/
public JSONObject(String baseName, Locale locale) throws JSONException {
this();
ResourceBundle bundle =
ResourceBundle.getBundle(baseName, locale, Thread.currentThread().getContextClassLoader());
// Iterate through the keys in the bundle.
Enumeration keys = bundle.getKeys();
while (keys.hasMoreElements()) {
Object key = keys.nextElement();
if (key instanceof String) {
// Go through the path, ensuring that there is a nested JSONObject for each
// segment except the last. Add the value using the last segment's name into
// the deepest nested JSONObject.
String[] path = ((String) key).split("\\.");
int last = path.length - 1;
JSONObject target = this;
for (int i = 0; i < last; i += 1) {
String segment = path[i];
JSONObject nextTarget = target.optJSONObject(segment);
if (nextTarget == null) {
nextTarget = new JSONObject();
target.put(segment.toLowerCase(), nextTarget);
}
target = nextTarget;
}
target.put(path[last].toLowerCase(), bundle.getString((String) key));
}
}
}
/**
* Serializing means getting every field, and setting the appropriate JSONObject field. Actual
* serialization is done at the end when the whole JSON object is built
*
* @param serializer
* @param obj
* @param structObjectInspector
*/
private JSONObject serializeStruct(
Object obj, StructObjectInspector soi, List<String> columnNames) {
// do nothing for null struct
if (null == obj) {
return null;
}
JSONObject result = new JSONObject();
List<? extends StructField> fields = soi.getAllStructFieldRefs();
for (int i = 0; i < fields.size(); i++) {
StructField sf = fields.get(i);
Object data = soi.getStructFieldData(obj, sf);
if (null != data) {
try {
// we want to serialize columns with their proper HIVE name,
// not the _col2 kind of name usually generated upstream
result.put(
getSerializedFieldName(columnNames, i, sf),
serializeField(data, sf.getFieldObjectInspector()));
} catch (JSONException ex) {
LOG.warn("Problem serializing", ex);
throw new RuntimeException(ex);
}
}
}
return result;
}
/**
* Get an array of field names from a JSONObject.
*
* @return An array of field names, or null if there are no names.
*/
public static String[] getNames(JSONObject jo) {
int length = jo.length();
if (length == 0) {
return null;
}
Iterator iterator = jo.keys();
String[] names = new String[length];
int i = 0;
while (iterator.hasNext()) {
names[i] = (String) iterator.next();
i += 1;
}
return names;
}
/**
* Write the contents of the JSONObject as JSON text to a writer. For compactness, no whitespace
* is added.
*
* <p>Warning: This method assumes that the data structure is acyclical.
*
* @return The writer.
* @throws JSONException
*/
public Writer write(Writer writer) throws JSONException {
try {
boolean commanate = false;
Iterator keys = this.keys();
writer.write('{');
while (keys.hasNext()) {
if (commanate) {
writer.write(',');
}
Object key = keys.next();
writer.write(quote(key.toString()));
writer.write(':');
Object value = this.map.get(key);
if (value instanceof JSONObject) {
((JSONObject) value).write(writer);
} else if (value instanceof JSONArray) {
((JSONArray) value).write(writer);
} else {
writer.write(valueToString(value));
}
commanate = true;
}
writer.write('}');
return writer;
} catch (IOException exception) {
throw new JSONException(exception);
}
}
/**
* Hive will call this to serialize an object. Returns a writable object of the same class
* returned by <a href="#getSerializedClass">getSerializedClass</a>
*
* @param obj The object to serialize
* @param objInspector The ObjectInspector that knows about the object's structure
* @return a serialized object in form of a Writable. Must be the same type returned by <a
* href="#getSerializedClass">getSerializedClass</a>
* @throws SerDeException
*/
@Override
public Writable serialize(Object obj, ObjectInspector objInspector) throws SerDeException {
// make sure it is a struct record
if (objInspector.getCategory() != Category.STRUCT) {
throw new SerDeException(
getClass().toString()
+ " can only serialize struct types, but we got: "
+ objInspector.getTypeName());
}
JSONObject serializer = serializeStruct(obj, (StructObjectInspector) objInspector, columnNames);
Text t = new Text(serializer.toString());
serializedDataSize = t.getBytes().length;
return t;
}
/**
* Construct a JSONObject from a subset of another JSONObject. An array of strings is used to
* identify the keys that should be copied. Missing keys are ignored.
*
* @param jo A JSONObject.
* @param names An array of strings.
* @throws JSONException
* @exception JSONException If a value is a non-finite number or if a name is duplicated.
*/
public JSONObject(JSONObject jo, String[] names) {
this();
for (int i = 0; i < names.length; i += 1) {
try {
putOnce(names[i].toLowerCase(), jo.opt(names[i]));
} catch (Exception ignore) {
}
}
}
/**
* Serializes a Hive map<> using a JSONObject.
*
* @param obj the object to serialize
* @param moi the object's inspector
* @return
*/
private JSONObject serializeMap(Object obj, MapObjectInspector moi) {
if (obj == null) {
return null;
}
JSONObject jo = new JSONObject();
Map m = moi.getMap(obj);
for (Object k : m.keySet()) {
try {
jo.put(
serializeField(k, moi.getMapKeyObjectInspector()).toString(),
serializeField(m.get(k), moi.getMapValueObjectInspector()));
} catch (JSONException ex) {
LOG.warn("Problem serializing map");
}
}
return jo;
}
