private void skipToField(JsonParser jp, String fieldName, ParseState state)
throws JsonParseException, IOException {
String lastFieldName = null;
while (jp.getCurrentToken() != null) {
switch (jp.getCurrentToken()) {
case FIELD_NAME:
lastFieldName = jp.getCurrentName();
jp.nextToken();
break;
case START_OBJECT:
if (!state.inRow) {
state.inRow = true;
jp.nextToken();
} else {
if (isInField(fieldName, lastFieldName)) {
return;
} else {
jp.skipChildren();
}
}
break;
default:
if (isInField(fieldName, lastFieldName)) {
jp.nextToken();
return;
}
jp.nextToken();
break;
}
}
}
@Override
public DateMidnight deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException {
// We'll accept either long (timestamp) or array:
if (jp.isExpectedStartArrayToken()) {
jp.nextToken(); // VALUE_NUMBER_INT
int year = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int month = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int day = jp.getIntValue();
if (jp.nextToken() != JsonToken.END_ARRAY) {
throw ctxt.wrongTokenException(jp, JsonToken.END_ARRAY, "after DateMidnight ints");
}
return new DateMidnight(year, month, day);
}
switch (jp.getCurrentToken()) {
case VALUE_NUMBER_INT:
return new DateMidnight(jp.getLongValue());
case VALUE_STRING:
DateTime local = parseLocal(jp);
if (local == null) {
return null;
}
return local.toDateMidnight();
}
throw ctxt.wrongTokenException(
jp, JsonToken.START_ARRAY, "expected JSON Array, Number or String");
}
private Map<String, Integer> readHeaderFields(JsonParser jp)
throws JsonParseException, IOException {
Map<String, Integer> map = new HashMap<String, Integer>();
jp.nextToken();
String nextFieldName = jp.getCurrentName();
while (!nextFieldName.equals(ROWS_FIELD_NAME)) {
jp.nextToken();
map.put(nextFieldName, Integer.valueOf(jp.getIntValue()));
jp.nextToken();
nextFieldName = jp.getCurrentName();
}
return map;
}
@Override
public EnumMap<?, ?> deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {
// Ok: must point to START_OBJECT
if (jp.getCurrentToken() != JsonToken.START_OBJECT) {
return _deserializeFromEmpty(jp, ctxt);
}
EnumMap result = constructMap();
final JsonDeserializer<Object> valueDes = _valueDeserializer;
final TypeDeserializer typeDeser = _valueTypeDeserializer;
while ((jp.nextToken()) == JsonToken.FIELD_NAME) {
String keyName = jp.getCurrentName(); // just for error message
// but we need to let key deserializer handle it separately, nonetheless
Enum<?> key = (Enum<?>) _keyDeserializer.deserializeKey(keyName, ctxt);
if (key == null) {
if (!ctxt.isEnabled(DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL)) {
throw ctxt.weirdStringException(
keyName,
_enumClass,
"value not one of declared Enum instance names for " + _mapType.getKeyType());
}
/* 24-Mar-2012, tatu: Null won't work as a key anyway, so let's
* just skip the entry then. But we must skip the value as well, if so.
*/
jp.nextToken();
jp.skipChildren();
continue;
}
// And then the value...
JsonToken t = jp.nextToken();
/* note: MUST check for nulls separately: deserializers will
* not handle them (and maybe fail or return bogus data)
*/
Object value;
try {
if (t == JsonToken.VALUE_NULL) {
value = valueDes.getNullValue(ctxt);
} else if (typeDeser == null) {
value = valueDes.deserialize(jp, ctxt);
} else {
value = valueDes.deserializeWithType(jp, ctxt, typeDeser);
}
} catch (Exception e) {
wrapAndThrow(e, result, keyName);
return null;
}
result.put(key, value);
}
return result;
}
@Override
public LocalDateTime deserialize(JsonParser jp, DeserializationContext ctxt)
throws IOException, JsonProcessingException {
// We'll accept either long (timestamp) or array:
if (jp.isExpectedStartArrayToken()) {
jp.nextToken(); // VALUE_NUMBER_INT
int year = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int month = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int day = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int hour = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int minute = jp.getIntValue();
jp.nextToken(); // VALUE_NUMBER_INT
int second = jp.getIntValue();
// let's leave milliseconds optional?
int millisecond = 0;
if (jp.nextToken() != JsonToken.END_ARRAY) { // VALUE_NUMBER_INT
millisecond = jp.getIntValue();
jp.nextToken(); // END_ARRAY?
}
if (jp.getCurrentToken() != JsonToken.END_ARRAY) {
throw ctxt.wrongTokenException(jp, JsonToken.END_ARRAY, "after LocalDateTime ints");
}
return new LocalDateTime(year, month, day, hour, minute, second, millisecond);
}
switch (jp.getCurrentToken()) {
case VALUE_NUMBER_INT:
return new LocalDateTime(jp.getLongValue());
case VALUE_STRING:
DateTime local = parseLocal(jp);
if (local == null) {
return null;
}
return local.toLocalDateTime();
}
throw ctxt.wrongTokenException(jp, JsonToken.START_ARRAY, "expected JSON Array or Number");
}
private Object success(Class<?> clazz, HttpInputMessage inputMessage)
throws JsonParseException, IOException {
// Note, parsing code used from ektorp project
JsonParser jp = objectMapper.getJsonFactory().createJsonParser(inputMessage.getBody());
if (jp.nextToken() != JsonToken.START_OBJECT) {
throw new RuntimeException("Expected data to start with an Object");
}
Map<String, Integer> fields = readHeaderFields(jp);
List result;
if (fields.containsKey(TOTAL_ROWS_FIELD_NAME)) {
int totalRows = fields.get(TOTAL_ROWS_FIELD_NAME);
if (totalRows == 0) {
return Collections.emptyList();
}
result = new ArrayList(totalRows);
} else {
result = new ArrayList();
}
ParseState state = new ParseState();
Object first = parseFirstRow(jp, state, clazz);
if (first == null) {
return Collections.emptyList();
} else {
result.add(first);
}
while (jp.getCurrentToken() != null) {
skipToField(jp, state.docFieldName, state);
if (atEndOfRows(jp)) {
return result;
}
result.add(jp.readValueAs(clazz));
endRow(jp, state);
}
return result;
}
private Object parseFirstRow(JsonParser jp, ParseState state, Class clazz)
throws JsonParseException, IOException, JsonProcessingException, JsonMappingException {
skipToField(jp, VALUE_FIELD_NAME, state);
JsonNode value = null;
if (atObjectStart(jp)) {
value = jp.readValueAsTree();
jp.nextToken();
if (isEndOfRow(jp)) {
state.docFieldName = VALUE_FIELD_NAME;
Object doc = objectMapper.readValue(value, clazz);
endRow(jp, state);
return doc;
}
}
skipToField(jp, INCLUDED_DOC_FIELD_NAME, state);
if (atObjectStart(jp)) {
state.docFieldName = INCLUDED_DOC_FIELD_NAME;
Object doc = jp.readValueAs(clazz);
endRow(jp, state);
return doc;
}
return null;
}
private void endRow(JsonParser jp, ParseState state) throws IOException, JsonParseException {
state.inRow = false;
jp.nextToken();
}
