GSON and deserialization error
Question
Good day!
I bet over a mistake for several days, thoughts ran. Have an ArrayList of objects being serialized GSON and stored in MySQL in the TEXT.
This is function to deserialization:
private void listenBroadcasts() {
try {
while (!shutdownThreads)
{
try
{
ResultSet rs = sql.select("SELECT * FROM messages WHERE time > (now() - INTERVAL 2 SECOND)");
while (rs.next()) {
String subject = rs.getString("subject");
String jsonString = rs.getString("json");
String className = rs.getString("class");
int id = rs.getInt("id");
if (jsonSubjects.contains(subject)
&& !StringUtils.isEmpty(className)
&& !StringUtils.isEmpty(jsonString)
&& id != myLastID) {
LOGGER.info("JSON: "+jsonString);
final Class clazz = Class.forName(className);
Object object = gson.fromJson(jsonString, clazz);
JsonEnvelope envelope = new JsonEnvelope(rs.getString("sender"), null, subject, object);
LOGGER.debug("Received message: "
+ " sender: " + envelope.getSenderInstance()
+ " receiver: " + envelope.getReceiverInstance()
+ " to subject: "
+ envelope.getSubject() + " (" + envelope.getClass().getSimpleName() + ")");
myLastID = id;
jsonReceiveQueue.put(envelope);
}
}
rs.close();
Thread.sleep(1000L);
} catch (final SQLException e) {
LOGGER.debug("Error receiving JSON message ", e);
} catch (final ClassNotFoundException e) {
LOGGER.error("Error deserializing JSON message ", e);
} catch (final InterruptedException e)
{
//LOGGER.error("Interrupt erro in JSOM message ", e);
}
}
} catch (Exception e) {
LOGGER.error("Error JsonMessaging: "+e.toString());
e.printStackTrace();
}
}
When sending a single object, all proceeds normally - the object is serialized and desializuetsya normal. Once the array is passed - it normally serialized, while desearilizatsii falls error.
INFO (messaging.JsonMessaging) - JSON:
{"devices":["{
"name": "not set",
"node": 1,
"zone": 0,
"type": "Portable Remote Controller",
"internalType": "controller",
"manufName": "undefined",
"productName": "",
"uuid": "413e3621-f4eb-4469-b986-78699455541c",
"status": "Listening",
"source": "zwave",
"internalName": "zwave/controller/1",
"values": {
"Basic": "0"
}
}","{
"name": "not set",
"node": 4,
"zone": 0,
"type": "Routing Binary Sensor",
"internalType": "binarysensor",
"manufName": "undefined",
"productName": "",
"uuid": "0dd6743c-6250-4cda-ab5c-871844090642",
"status": "Sleeping",
"source": "zwave",
"internalName": "zwave/binarysensor/4",
"values": {
"Sensor": "false",
"Wake-up Interval": "3600"
}
}","{
"name": "not set",
"node": 3,
"zone": 0,
"type": "Multilevel Power Switch",
"internalType": "dimmer",
"manufName": "FIBARO System",
"productName": "FGD211 Universal Dimmer 500W",
"uuid": "c00228e5-45cc-4ac4-8371-9ac179857926",
"status": "Listening",
"source": "zwave",
"internalName": "zwave/dimmer/3",
"values": {
"Timeout": "0",
"1. Enable/Disable ALL ON/OFF": "null",
"20. ADVANCED Impulse length": "110",
"Frame Count": "0",
"17. 3-way switch": "null",
"8. Dimming step at automatic control": "1",
"Report": "null",
"Protocol Version": "3.34",
"Application Version": "1.06",
"Test": "null",
"13. Minimum dimmer level control": "2",
"10. Time of AUTOMATIC moving between the extreme dimming values": "1",
"Test Powerlevel": "null",
"Start Level": "0",
"Bright": "null",
"Library Version": "3",
"12. Maximum dimmer level control": "99",
"16. Saving state before power faillure": "null",
"Test Node": "0",
"39. ALARM FLASHING alarm time": "600",
"14. Inputs Button/Switch configuration": "null",
"Dim": "null",
"18. Synchronizing light level for associated devices": "null",
"7. Control key #2 behaviour": "null",
"11. Dimming step at manual control": "1",
"15. Double click option": "null",
"30. Alarm": "null",
"9. Time of MANUALLY moving between the extreme dimming values": "5",
"Powerlevel": "null",
"19. Change [On-Off] bi-stable keys": "null",
"Test Status": "null",
"Ignore Start Level": "true",
"Level": "99",
"Set Powerlevel": "null",
"Switch All": "null",
"6. Separation of association sending (key 1)": "null",
"Acked Frames": "64"
}
}","{
"name": "not set",
"node": 2,
"zone": 0,
"type": "Routing Alarm Sensor",
"internalType": "alarmsensor",
"manufName": "undefined",
"productName": "",
"uuid": "1588357d-fdf0-4813-b447-10158a72be80",
"status": "Sleeping",
"source": "zwave",
"internalName": "zwave/alarmsensor/2",
"values": {
"Application Version": "Unknown",
"Alarm Type": "0",
"Battery Level": "100",
"Wake-up Interval": "3600",
"Protocol Version": "Unknown",
"Alarm Level": "0",
"Library Version": "Unknown"
}
}"]}
26 Nov 2013 12:15:04
ERROR (messaging.JsonMessaging) - Error JsonMessaging: com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated array at line 2 column 5
com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated array at line 2 column 5
at com.google.gson.Gson.fromJson(Gson.java:818)
at com.google.gson.Gson.fromJson(Gson.java:768)
at com.google.gson.Gson.fromJson(Gson.java:717)
at com.google.gson.Gson.fromJson(Gson.java:689)
at ru.iris.common.messaging.JsonMessaging.listenBroadcasts(JsonMessaging.java:164)
at ru.iris.common.messaging.JsonMessaging.access$000(JsonMessaging.java:37)
at ru.iris.common.messaging.JsonMessaging$1.run(JsonMessaging.java:63)
at java.lang.Thread.run(Thread.java:724)
Caused by: com.google.gson.stream.MalformedJsonException: Unterminated array at line 2 column 5
at com.google.gson.stream.JsonReader.syntaxError(JsonReader.java:1505)
at com.google.gson.stream.JsonReader.doPeek(JsonReader.java:465)
at com.google.gson.stream.JsonReader.hasNext(JsonReader.java:403)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:80)
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.read(CollectionTypeAdapterFactory.java:60)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
at com.google.gson.Gson.fromJson(Gson.java:803)
... 7 more
1 answers
solution1
2 ACCPTED 2013-11-26 09:16:21
The gson error you have is correct as the JSON you have supplied is invalid.
Use a tool like http://jsonlint.com/ to check your JSON.
I have run your supplied JSON through formatter and corrected the problem:
{
"devices": [
{
"name": "not set",
"node": 1,
"zone": 0,
"type": "Portable Remote Controller",
"internalType": "controller",
"manufName": "undefined",
"productName": "",
"uuid": "413e3621-f4eb-4469-b986-78699455541c",
"status": "Listening",
"source": "zwave",
"internalName": "zwave/controller/1",
"values": {
"Basic": "0"
}
},
{
"name": "not set",
"node": 4,
"zone": 0,
"type": "Routing Binary Sensor",
"internalType": "binarysensor",
"manufName": "undefined",
"productName": "",
"uuid": "0dd6743c-6250-4cda-ab5c-871844090642",
"status": "Sleeping",
"source": "zwave",
"internalName": "zwave/binarysensor/4",
"values": {
"Sensor": "false",
"Wake-up Interval": "3600"
}
},
{
"name": "not set",
"node": 3,
"zone": 0,
"type": "Multilevel Power Switch",
"internalType": "dimmer",
"manufName": "FIBARO System",
"productName": "FGD211 Universal Dimmer 500W",
"uuid": "c00228e5-45cc-4ac4-8371-9ac179857926",
"status": "Listening",
"source": "zwave",
"internalName": "zwave/dimmer/3",
"values": {
"Timeout": "0",
"1. Enable/Disable ALL ON/OFF": "null",
"20. ADVANCED Impulse length": "110",
"Frame Count": "0",
"17. 3-way switch": "null",
"8. Dimming step at automatic control": "1",
"Report": "null",
"Protocol Version": "3.34",
"Application Version": "1.06",
"Test": "null",
"13. Minimum dimmer level control": "2",
"10. Time of AUTOMATIC moving between the extreme dimming values": "1",
"Test Powerlevel": "null",
"Start Level": "0",
"Bright": "null",
"Library Version": "3",
"12. Maximum dimmer level control": "99",
"16. Saving state before power faillure": "null",
"Test Node": "0",
"39. ALARM FLASHING alarm time": "600",
"14. Inputs Button/Switch configuration": "null",
"Dim": "null",
"18. Synchronizing light level for associated devices": "null",
"7. Control key #2 behaviour": "null",
"11. Dimming step at manual control": "1",
"15. Double click option": "null",
"30. Alarm": "null",
"9. Time of MANUALLY moving between the extreme dimming values": "5",
"Powerlevel": "null",
"19. Change [On-Off] bi-stable keys": "null",
"Test Status": "null",
"Ignore Start Level": "true",
"Level": "99",
"Set Powerlevel": "null",
"Switch All": "null",
"6. Separation of association sending (key 1)": "null",
"Acked Frames": "64"
}
},
{
"name": "not set",
"node": 2,
"zone": 0,
"type": "Routing Alarm Sensor",
"internalType": "alarmsensor",
"manufName": "undefined",
"productName": "",
"uuid": "1588357d-fdf0-4813-b447-10158a72be80",
"status": "Sleeping",
"source": "zwave",
"internalName": "zwave/alarmsensor/2",
"values": {
"Application Version": "Unknown",
"Alarm Type": "0",
"Battery Level": "100",
"Wake-up Interval": "3600",
"Protocol Version": "Unknown",
"Alarm Level": "0",
"Library Version": "Unknown"
}
}
] }
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