protected Object _unwrapAndDeserialize(
JsonParser jp, DeserializationContext ctxt, JavaType rootType, JsonDeserializer<Object> deser)
throws IOException, JsonParseException, JsonMappingException {
SerializedString rootName = _provider.findExpectedRootName(ctxt.getConfig(), rootType);
if (jp.getCurrentToken() != JsonToken.START_OBJECT) {
throw JsonMappingException.from(
jp,
"Current token not START_OBJECT (needed to unwrap root name '"
+ rootName
+ "'), but "
+ jp.getCurrentToken());
}
if (jp.nextToken() != JsonToken.FIELD_NAME) {
throw JsonMappingException.from(
jp,
"Current token not FIELD_NAME (to contain expected root name '"
+ rootName
+ "'), but "
+ jp.getCurrentToken());
}
String actualName = jp.getCurrentName();
if (!rootName.getValue().equals(actualName)) {
throw JsonMappingException.from(
jp,
"Root name '"
+ actualName
+ "' does not match expected ('"
+ rootName
+ "') for type "
+ rootType);
}
// ok, then move to value itself....
jp.nextToken();
Object result;
if (_valueToUpdate == null) {
result = deser.deserialize(jp, ctxt);
} else {
deser.deserialize(jp, ctxt, _valueToUpdate);
result = _valueToUpdate;
}
// and last, verify that we now get matching END_OBJECT
if (jp.nextToken() != JsonToken.END_OBJECT) {
throw JsonMappingException.from(
jp,
"Current token not END_OBJECT (to match wrapper object with root name '"
+ rootName
+ "'), but "
+ jp.getCurrentToken());
}
return result;
}
@Override
public final void writeFieldName(SerializedString name)
throws IOException, JsonGenerationException {
// Object is a value, need to verify it's allowed
int status = _writeContext.writeFieldName(name.getValue());
if (status == JsonWriteContext.STATUS_EXPECT_VALUE) {
_reportError("Can not write a field name, expecting a value");
}
_writeFieldName(name, (status == JsonWriteContext.STATUS_OK_AFTER_COMMA));
}
/**
* Non-optimal default implementation for serializing given {@link SerializedString}: sub-classes
* are strongly recommmended to implement this efficiently. Default implementation mostly exists
* to avoid introducing binary incompatibility.
*
* @since 1.6
*/
protected void _writeFieldName(SerializedString name, boolean commaBefore)
throws IOException, JsonGenerationException {
// Note: sub-classes are strongly urged to override this method
_writeFieldName(name.getValue(), commaBefore);
}