I want to make api calls using json object request in android studio using kotlin.
This is the api.
How to access the 'name' in the array articles ?. I can access all the other things except 'id' and 'name'.
This is my code
val url = "https://news-api-don.herokuapp.com/api/v1?apiKey=20d14506791144cc8b424549c42068c0"
val jsonObjectRequest = JsonObjectRequest(
Request.Method.GET, url, null,
{
val newsJsonArray = it.getJSONArray("articles")
val newsArray = ArrayList<News>()
for(i in 0 until newsJsonArray.length()) {
val newsJsonObject = newsJsonArray.getJSONObject(i)
val news = News(
newsJsonObject.getString("title"),
newsJsonObject.getString("author"),
newsJsonObject.getString("url"),
newsJsonObject.getString("urlToImage")
)
newsArray.add(news)
}
mAdapter.updateNews(newsArray)
swipeRefreshLayout.isRefreshing = false
progressBar.visibility = View.GONE
},
{
Toast.makeText(this,"Something went wrong", Toast.LENGTH_LONG).show()
swipeRefreshLayout.isRefreshing = false
progressBar.visibility = View.GONE
}
)
MySingleton.getInstance(this).addToRequestQueue(jsonObjectRequest)
}
Related
I'm trying to put several event types in the same Kafka topic using the JSON format, but in the Producer implementation I'm always getting org.apache.kafka.common.errors.SerializationException: Error serializing JSON message. Seems that the annotation #Schema isn't working as expected is like the schema defined by the annotation isn't enriched properly and in the method that validates the backward compatibility the schema defined by my event has the schemaObj empty and the result is not compatible and fails.
My event:
#Schema(
value = "1",
refs = Array(new SchemaReference(name = "event", subject = "event"))
)
case class Event(#BeanProperty id: String,
#BeanProperty name: String)
Producer:
def send(): Unit = {
val props = new Properties() {
put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, "localhost:9092")
put(
ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG,
"org.apache.kafka.common.serialization.StringSerializer"
)
put(
ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG,
"io.confluent.kafka.serializers.json.KafkaJsonSchemaSerializer"
)
put("auto.register.schemas", "false")
put("use.latest.version", "true")
put("schema.registry.url", "http://127.0.0.1:8081")
put("json.fail.invalid.schema", "true")
}
val producer = new KafkaProducer[String, Event](props)
val topic = "all-json"
val key = "key1"
val event = Event("id", "name")
val record = new ProducerRecord[String, Event](topic, key, event)
producer.send(record).get
}
By the command line, I can perfectly produce the events. The JSON Schema is modeled by
{
"oneOf": [
{ "$ref": "Event.schema.json" },
{ "$ref": "EventB.schema.json" }
]
}
...
the dependencies of confluent used are the version 6.0.1.
Do you know what is the issue?
I tried convert to data class to map. (Under the code is just example code)
data class User (
val name : String = "",
val age : Int = 0,
val deviceGroup: MutableSet<DeviceGroup> = mutableSetOf()
)
data class DeviceGroup (
val name : String = "",
val deviceLink : MutableSet<DeviceLink> = mutableSetOf()
)
data class DeviceLink (
val id : Int = 0,
val device : Device
)
data class Device (
val devId : Int = 0,
val name : String = ""
)
fun main (request : HttpServletRequest) {
val currentUser = request.session.getAttribute("user") as User
val data = userRepository.findByName(currentUser.name)
// return currentUser
// result is {name="test", age=17, deviceGroup = [{name="group1"}, {name="group2"}]}
// I want deserialization data class to Map
val response = data.deviceGroup.toMap()
response.deivceGroup.forEach {
// And add new key, pair
it.add(Map<String, MutableSet<Device>>("devices", mutableSetOf()))
// Lastly, I want put in the value
deviceGroupRepository.findByName(it.name).deviceLink.forEach {
it.devices.add(this)
}
}
return response
}
if just return the data value, that's result is "{name="test", age=17, deviceGroup = [{name="group1"}, {name="group2"}]}"
How to convert to data class to Map object and add new key pair?
Use associate to turn a collection into a Map
The Kotlin standard library provides a function called associate which will take a collection of objects and transform them into a map. It takes one argument, which is a function specifying what the keys and values of the map should be.
For example, in your case, you would call it like this:
val response = data.deviceGroup.associate { it.name to it.deviceLink }
It will return a Map<String, MutableSet<DeviceLink>> where the key is the name of the device group and the value is the deviceLink set.
The easiest way to add new values is simply to append them with the + operator.
val response = data.deviceGroup.associate {
it.name to it.deviceLink
} + mapOf("device" to emptySet())
If you need more control than that, you could use .toMutableMap() so new entries can be added using put.
val response = data.deviceGroup.associate {
it.name to it.deviceLink
}.toMutableMap()
response.put("device", emptySet())
After calling a MS Graph API using HttpBuilder which return user information, I would like to return the Id attribute of the Json response
The complete Json response is as below :
{
#odata.context=https://graph.microsoft.com/v1.0/$metadata#users,
value=[{
businessPhones=[],
displayName=Serge Cal GMAIL,
givenName=null,
jobTitle=null,
mail=user1.tom#gmail.com,
mobilePhone=null,
officeLocation=null,
preferredLanguage=null,
surname=null,
userPrincipalName=user1.tom_gmail.com#EXT##SCALDERARA.onmicrosoft.com,
id=253bca1d-6c03-441f-92e4-e206c7d180f7
}]
}
For doing so I have a groovy method define as below :
public String getUserIdByEmailQuery(String AuthToken,String userEmail){
String _userId
def http = new HTTPBuilder(graph_base_user_url +"?")
http.request(GET) {
requestContentType = ContentType.JSON
uri.query = [ $filter:"mail eq '$userEmail'".toString() ]
headers.'Authorization' = "Bearer " + AuthToken
response.success = { resp, json ->
**_userId=json["value"]["id"]**
}
// user ID not found : error 404
response.'404' = { resp ->
_userId = 'Not Found'
}
}
_userId
}
With this update the reponse value is [xxx-xxx-xxx-xxx-xxx-], which is correct excpet that it suround the value with []
Any idea ?
regards
The original problem was caused by the wrong expression to get the id and since you have got the id list [xxx-xxx-xxx-xxx, xxx-xxx-xxx-xxx, ...] by json["value"]["id"], so you just need to use json["value"]["id"][0] to get the first id of the list.
And this expression json["value"][0]["id"] might also work.
Update:
You can use groovy.json.JsonSlurper to help you parse the json and get the id value.
import groovy.json.JsonSlurper
JsonSlurper slurper = new JsonSlurper()
Map parsedJson = slurper.parseText(json)
String idValue = parsedJson.value[0].id
I'm new to LUA and tried learning coding this language with Garrys Mod.
I want to get the messages from the Garrys Mod chat and send them into a Discord channel with a webhook.
It works, but I tried expanding this project with embeded messages. I need JSON for this and used json.lua as a library.
But as soon as I send a message I retrieve the following error message:
attempt to index global 'json' (a nil value)
The code that causes the error is the following:
json.encode({ {
["embeds"] = {
["description"] = text,
["author"] = {
["name"] = ply:Nick()
},
},
} }),
The complete code:
AddCSLuaFile()
json = require("json")
webhookURL = "https://discordapp.com/api/webhooks/XXX"
local DiscordWebhook = DiscordWebhook or {}
hook.Add( "PlayerSay", "SendMsg", function( ply, text )
t_post = {
content = json.encode({ {
["embeds"] = {
["description"] = text,
["author"] = {
["name"] = ply:Nick()
},
},
} }),
username = "Log",
}
http.Post(webhookURL, t_post)
end )
I hope somebody can help me
Garry's Mod does provide two functions to work with json.
They are:
util.TableToJSON( table table, boolean prettyPrint=false )
and
util.JSONToTable( string json )
There is no need to import json and if I recall correctly it isn't even possible.
For what you want to do you need to build your arguments as a table like this:
local arguments = {
["key"] = "Some value",
["42"] = "Not always the answer",
["deeper"] = {
["my_age"] = 22,
["my_name"] = getMyName()
},
["even more"] = from_some_variable
and then call
local args_as_json = util.TableToJSON(arguments)
Now you can pass args_as_json to your
http.Post( string url, table parameters, function onSuccess=nil, function onFailure=nil, table headers={} )
I'm trying to add to the JsonResult object a parsed Json string, but I couldn't do it, the parser object in the browser is shown as:
"filter":[[[]],[[[],[]]]]
This is the full code
public JsonResult AjaxStandardGet(int id)
{
Standard ec = db.Standard.FirstOrDefault(s => s.IdStandard == id);
// inside filter: { "KeyDynamic1": "Value1", "KeyDynamic2": [ "AAA", "DDD"] }
var filter = JsonConvert.DeserializeObject(ec.Filter);
return Json(new
{
ec.IdStandard,
ec.Description,
filter,
ec.Observations,
Services = ec.StandardServices.Select(s => new {
s.IdStandardServices,
Tecnology = s.Tecnology?.Nombre,
ServiceType = s.ServiceType?.Description,
s.Quantity,
s.Cost,
Options = (!string.IsNullOrEmpty(s.Options) ? s.Options.Split(',') : null),
Total = s.Quantity * s.Cost
}),
Success = true
});
}
I can't create the model object because the filters are not allways the same.
I tried this:
Dictionary<string, object> filter = JsonConvert.DeserializeObject<Dictionary<string, object>>(ec.Filter);
And I get
"filter":{"KeyDynamic1":"Value1","KeyDynamic2":[[],[]]}
I suggest you to JToken or dynamic:
JToken filter = JToken.Parse(ec.Filter);
dynamic filter = JsonConvert.DeserializeObject<dynamic>(ec.Filter);
Here is working fiddle.
Update
It seems that JavaScriptSerializer is not able to do it. So you can serialize your result using Newtonsoft.Json and return it as a string:
var result = new
{
ec.IdStandard,
ec.Description,
filter,
ec.Observations,
Services = ec.StandardServices.Select(s => new {
s.IdStandardServices,
Tecnology = s.Tecnology?.Nombre,
ServiceType = s.ServiceType?.Description,
s.Quantity,
s.Cost,
Options = (!string.IsNullOrEmpty(s.Options) ? s.Options.Split(',') : null),
Total = s.Quantity * s.Cost
}),
Success = true
};
var json = JsonConvert.SerializeObject(result);
return Content(json, "application/json");