// Update and return given train line with the Jackson parser
// AG
public static <T> TrainLine updateLine(T address, TrainLine line) {
try {
Object trainData = new Object();
if (address instanceof URL) {
// Get train data from web
trainData = mapper.readValue((URL) address, Object.class);
} else if (address instanceof File) {
// Get train data locally
trainData = mapper.readValue((File) address, Object.class);
}
// System.out.println(trainData.toString());
// Go inside the wrapper
Object tripListObj = getFromMap(trainData, TRIP_LIST_KEY);
line = new TrainLine(tripListObj);
} catch (JsonParseException e) {
e.printStackTrace();
} catch (JsonMappingException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return line;
}
/**
* Helper method for constructing exception to indicate that given type id (parsed from JSON)
* could not be converted to a Java type.
*/
public JsonMappingException unknownTypeException(JavaType type, String id) {
return JsonMappingException.from(
_parser, "Could not resolve type id '" + id + "' into a subtype of " + type);
}
public JsonMappingException endOfInputException(Class<?> instClass) {
return JsonMappingException.from(
_parser, "Unexpected end-of-input when trying to deserialize a " + instClass.getName());
}
public JsonMappingException instantiationException(Class<?> instClass, String msg) {
return JsonMappingException.from(
_parser, "Can not construct instance of " + instClass.getName() + ", problem: " + msg);
}
/**
* Helper method for constructing instantiation exception for specified type, to indicate problem
* with physically constructing instance of specified class (missing constructor, exception from
* constructor)
*/
public JsonMappingException instantiationException(Class<?> instClass, Throwable t) {
return JsonMappingException.from(
_parser,
"Can not construct instance of " + instClass.getName() + ", problem: " + t.getMessage(),
t);
}
/**
* Helper method for constructing generic mapping exception with specified message and current
* location information
*/
public JsonMappingException mappingException(String message) {
return JsonMappingException.from(getParser(), message);
}
public JsonMappingException mappingException(Class<?> targetClass, JsonToken token) {
String clsName = _calcName(targetClass);
return JsonMappingException.from(
_parser, "Can not deserialize instance of " + clsName + " out of " + token + " token");
}
/** Helper method for indicating that the current token was expected to be another token. */
public JsonMappingException wrongTokenException(JsonParser jp, JsonToken expToken, String msg) {
return JsonMappingException.from(
jp, "Unexpected token (" + jp.getCurrentToken() + "), expected " + expToken + ": " + msg);
}