Develop Reference

How do I get the value from the ArrayOfObjects dynamically in MongoDB document with Java driver

I have got a below document in Mongodb collection , need to get the value of result of false with Java syntax .Any help can be appreciated .
{
"_id" : ObjectId("5f0890e870e631865877e"),
"user" : "testuser",
"Email" : "testuser#sample.com",
"Batch Systems" : [
"STAR",
"STORY",
"ITEMS",
],
"Email Systems" : [
{
"Bob" : {
"System" : "Bob",
**"result"** : true
}
},
{
"Wild" : {
"System" : "Wild",
"result" : true
}
}
{
"CRaft" : {
"System" : "Craft",
"result" : false
}
}
],
I can't go like Email Systems.Bob.result ,Email Systems.Wild.result,Email Systems.Craft.result .Can anyone suggest how to get the result value from all systems with Java synatax.

REST Api - JSON - "Cannot deserialize instance of object out of START_ARRAY token"

The issue in question is as follows:-
I have a POJO with a list of Apple objects , say applesList.
This is stored in Cosmos DB.
When applesList is null, the get endpoint works fine. I get the Pojo as is.
When applesList is populated with apples, i get the error as given in the Title.
How do i fix this?
Json that works with get :-
{
"userId" : "123",
"applesList" : null
}
Json that gives stated error on get, applesList is populated by api :-
{
"userId" : "123",
"applesList" : [
{
"color" : "red",
"weight" : "150 g"
},
{
"color" : "green",
"weight" : "200 g"
}
]
}
Edit :- missed mentioning Cosmos DB SQL API

Change applesList to an array.

Expected Character for no reason in a JsonPath

Assuming that I have this JSON:
{
"response" : {
"code" : "XXX",
"label" : "Lorem Ipsum",
"items" : [
{
"code" : "200",
"label" : "200 !!!"
},
{
"code" : "300",
"label" : "300 !!!!!"
},
{
"code" : "500",
"label" : "+500 !!!!!"
}]
}
}
I want to get the label of the item when code = 500 (as for example) in Java.
I'm using jayWay Library and this jsonPath:
"$.response.items[?(#.code='500')].label"
I'm getting this error while parsing : Expected character: )
The java code :
public static String getElementValueByJsonPath(String jsonContent, String jsonPath) {
if (checkJsonValidity(jsonContent)) {
String returnedValue ="";
Configuration config = Configuration.defaultConfiguration().addOptions(Option.SUPPRESS_EXCEPTIONS);
try {
returnedValue = ""+JsonPath.using(config).parse(jsonContent).read(jsonPath);
} catch (Exception e) {
System.out.println(e.getMessage());
}
return returnedValue;
}
return null;
Anyone knows why I have this error, and can I bypass it with another library or method.
Thanks

You get the error for a very valid reason, that is not a valid jsonpath query.
If you go to https://jsonpath.herokuapp.com/ ( which uses jayway ) and enter the same data and path you will see this is not a valid jsonpath query for jayway, or two of the other implementations, the only one that does not fail outright does not return what you are expecting. I think you need to go back and re-read the jsonpath documentation as this syntax clearly is not valid.
The correct syntax is $.response.items[?(#.code=='500')].label as the documentation clearly states.
I would not rely on implementations that do not fail on incorrect syntax.

How to get nested types in Elasticsearch

I have the following document:
{
"_index" : "testdb",
"_type" : "artWork",
"_id" : "0",
"_version" : 4,
"found" : true,
"_source":{"uuid":0,
"StatusHistoryList":[
{
"ArtWorkDate":"2015-08-28T15:52:03.030+05:00",
"ArtworkStatus":"ACTIVE"
},
{
"ArtWorkDate":"2015-08-28T15:52:03.030+05:00",
"ArtworkStatus":"INACTIVE"
}
]
}
and here is the mapping of the document:
{
"testdb" : {
"mappings" : {
"artWork" : {
"properties" : {
"StatusHistoryList" : {
"type" : "nested",
"properties" : {
"ArtWorkDate" : {
"type" : "string",
"store" : true
},
"ArtworkStatus" : {
"type" : "string",
"store" : true
}
}
},
"uuid" : {
"type" : "integer",
"store" : true
}
}
}
}
}
}
Now I want to access the values of StatusHistoryList. I got null values if I do it like this:
val get = client.prepareGet("testdb", "artWork", Id.toString()).setOperationThreaded(false)
.setFields("uuid",,"StatusHistoryList.ArtworkStatus","StatusHistoryList.ArtWorkDate","_source")
.execute()
.actionGet()
var artworkStatusList= get.getField("StatusHistoryList.ArtworkStatus").getValues.toArray()
var artWorkDateList= get.getField("StatusHistoryList.ArtWorkDate").getValues.toArray()
then I got null values from the code but my document contains the values then I found this question
so after that i tried to do it like this
var smap = get.getSource.get("StatusHistoryList").asInstanceOf[Map[String,Object]]
but then a ClassCastException is thrown
java.lang.ClassCastException: java.util.ArrayList cannot be cast to java.util.Map
Please help me how can I get the values of StatusHistoryList 's ArtworkStatus and ArtWorkDate values please guide me I will be very thankfull to you.

You have almost derived the solution. The GET request has retrieved the response but the problem is in parsing the response.
Let's see the problem. Below is the document that the elastic search returns as source
{
"uuid":0,
"StatusHistoryList":[
{
"ArtWorkDate":"2015-08-28T15:52:03.030+05:00",
"ArtworkStatus":"ACTIVE"
},
{
"ArtWorkDate":"2015-08-28T15:52:03.030+05:00",
"ArtworkStatus":"INACTIVE"
}
]
}
When we do get.getSource.get("StatusHistoryList") it returns List ArtWork objects and not a Map. That is the reason for the classCastException exception.
So if you cast the response to list of objects your problem will be solved.
But this would not be an ideal solution. Some of the libraries like Jackson-Faterxml does the job for you. Using the fasterxml library you can bind the json to equivalent POJO Object.

google distance matrix api strange

I am facing a strange problem here,
when I run below url from web browser or from java command line
http://maps.googleapis.com/maps/api/distancematrix/json?origins=416%2063,Sweden&destinations=424%2069,Stor%C3%A5s%20Industrigatan%2020,Angered,G%C3%B6teborg&sensor=false
I get below results.
{
"destination_addresses" : [ "Storås Industrigata 20, 424 69
Angered, Sweden" ],
"origin_addresses" : [ "Gothenburg, Sweden" ],
"rows" : [
{
"elements" : [
{
"distance" : {
"text" : "10.4 km",
"value" : 10388
},
"duration" : {
"text" : "15 mins",
"value" : 924
},
"status" : "OK"
}
]
}
],
"status" : "OK"
}
but when I run the same url from glassfish server I mean sending an
http request from
form submit I get below strange response
{ "destination_addresses" : [ "" ],
"origin_addresses" : [ "Gothenburg, Sweden" ],
"rows" : [
{
"elements" : [
{
"status" : "NOT_FOUND"
}
]
}
],
"status" : "OK"
}
please not destination_addresses is empty in this case and status in
NOT_FOUND.
Java code I used to get the response is
private String getResponse(String URL) throws Exception {
InputStream stream = new URL(URL).openStream();
byte[] array = new byte[stream.available()];
stream.read(array);
return new String(array);
}
please guide me to resolve this issue,
thanks....

Use https
unless google will not let your software to connect.
and
get a api key.
read this:
https://developers.google.com/maps/documentation/distance-matrix/start
https://maps.googleapis.com/maps/api/distancematrix/json?origins=416%2063,Sweden&destinations=424%2069,Stor%C3%A5s%20Industrigatan%2020,Angered,G%C3%B6teborg&sensor=false&key=YOUR_API_KEY
be sure to replace YOUR_API_KEY with your actual API key

I had a similar problem when using the Distance Matrix API in Java. Setting the language in my request seems to make it work:
DistanceMatrixElement distanceMatrixElement;
DistanceMatrix matrix;
try
{
matrix = distanceMatrixApiRequest
.origins(...)
.destinations(...)
.language("en")
.await();
}