I need to build a Json format in the following way in scala. How to implement the same ?
{
"name": "protocols",
"children": [
{
"name": "tcp", "children": [
{
"name": "source 1",
"children": [
{
"name": "destination 1",
"children": [
{
"name": "packet 1"
},
{
"name": "packet 4"
}
]
},
{
"name": "destination 2","children": [
{
"name": "packet 1"
},
{
"name": "packet 4"
}
]
},
I need a tree structure like this to be wriiten to a file .
If you are using play, your json structure can be represented with single case class
Here is a sample, where this case class is called Node
import play.api.libs.json.Json
case class Node(name: String, children: List[Node] = Nil)
implicit val format = Json.format[Node]
val childSource1 = Node("destination 1", List(Node("packet 1"), Node("packet 4")))
val childSource2 = Node("destination 2", List(Node("packet 1"), Node("packet 4")))
val source1 = Node("source 1", List(childSource1, childSource2))
val example = Node("protocols", List(Node("tcp", List(source1))))
Json.prettyPrint(Json.toJson(example))
Related
I'm trying to add sample data for my unit tests and I'm getting an assignment error when I'm trying to read in the JSON file related to the enum assignment.
types.ts
export enum TestType {
TYPE1 = "type1",
TYPE2 = "type2",
TYPE3 = "type 3"
}
export interface SampleDataType {
id: string;
name: string;
dataType?: TestType;
}
exampleData.json
[
{
"id": "1",
"name": "first",
"dataType": "type1"
},
{
"id": "2",
"name": "second",
"dataType": "type2"
},
{
"id": "3",
"name": "third",
"dataType": "type3"
}
]
unitTest.ts
import * as exampleData from "../../components/__mocks__/test-data/exampleData.json";
//...
const testItems: SampleDataType[] = exampleData;
I'm getting the following error:
I've also tried using "TYPE1" as the sample data value, but no luck. Is there a way to assign the value in json and have it read in the unit test?
My apache beam application receives a message in JSON array but insert each row to a BigQuery table. How can I support this usecase in ApacheBeam? Can I split each row and insert it to table one by one?
JSON message example:
[
{"id": 1, "name": "post1", "price": 10},
{"id": 2, "name": "post2", "price": 20},
{"id": 3, "name": "post3", "price": 30}
]
BigQuery table schema:
[
{
"mode": "REQUIRED",
"name": "id",
"type": "INT64"
},
{
"mode": "REQUIRED",
"name": "name",
"type": "STRING"
},
{
"mode": "REQUIRED",
"name": "price",
"type": "INT64"
}
]
Here is my solution. I converted JSON string to List once then c.output one by one. My code in in Scala but you can do the same thing in Java.
case class MyTranscationRecord(id: String, name: String, price: Int)
case class MyTranscation(recordList: List[MyTranscationRecord])
class ConvertJSONTextToMyRecord extends DoFn[KafkaRecord[java.lang.Long, String], MyTranscation]() {
private val logger: Logger = LoggerFactory.getLogger(classOf[ConvertJSONTextToMyRecord])
#ProcessElement
def processElement(c: ProcessContext): Unit = {
try {
val mapper: ObjectMapper = new ObjectMapper()
.registerModule(DefaultScalaModule)
val messageText = c.element.getKV.getValue
val transaction: MyRecord = mapper.readValue(messageText, classOf[MyTranscation])
logger.info(s"successfully converted to an EPC transaction = $transaction")
for (record <- transaction.recordList) {
c.output(record)
}
} catch {
case e: Exception =>
val message = e.getLocalizedMessage + e.getStackTrace
logger.error(message)
}
}
}
I want to print out JSON images as a variable.
This is my local JSON file (JsonData.json):
{
"appetizer": [
{
"num": "appetizer1",
"name": "salad",
"condition": [ "1", "2" ],
"image": "./appetizer/salad.png"
},
{
"num": "appetizer2",
"name": "soup",
"condition": [ "2", "3" ],
"image": "./appetizer/soup.png"
},
…
],
"main": [
{
"num": "main1",
"name": "beef",
"condition": [ "1" ],
"image": "./main/beef.png"
},
{
"num": "main2",
"name": "fish",
"condition": [ "2", "3" ],
"image": "./main/fish.png"
},
…
]
}
I filtered the name when condition="2". (salad,soup,fish)
This is the code for filtering name:
const newArray1 = [...JsonData["apptizer"], ...JsonData["main"]];
const JsonResult = newArray1.filter(item => {
if(item.condition.indexOf("2") !== -1) return item.name;
});
AND I want to get the image when condition="2".
How can I get them? And How can I print out them?
Do I have to use base64? If so, Can you tell me how to use it?
I saw the explanation, but I can't understand it.
And I imported JSON file this way (I've been correctly using it):
var JsonData = require('./JsonData.json');
You can use below code:
let mainObject = JSON.parse(JSON.stringify(data))
let allKeys = Object.keys(mainObject)
let finalObject = []
allKeys.map((value, index) => {
let array = mainObject[value]
array.map((aryObject, aryIndex) => {
let condition = aryObject['condition']
if (condition.includes('2')) {
finalObject.push(aryObject)
}
})
})
alert(JSON.stringify(finalObject))
You can import data in top of screen:
import { data } from './data';
You can add below text in data.js:
export const data = {
"appetizer": [
{
"num": "appetizer1",
"name": "salad",
"condition": ["1"],
"image": "./appetizer/salad.png"
},
{
"num": "appetizer2222",
"name": "soup",
"condition": ["2", "3"],
"image": "./appetizer/soup.png"
},
],
"main": [
{
"num": "main1",
"name": "beef",
"condition": ["1"],
"image": "./main/beef.png"
},
{
"num": "main2",
"name": "fish",
"condition": ["21", "3"],
"image": "./main/fish.png"
},
]
}
You can use Object#values to get the arrays corresponding to appetizer and main and then Array#flat to extract the nested objects into a transformed array. Then use the Array#filter (which you are already using) to filter out only the required objects based on your condition and then Array#map to get the name and image values out of every filtered object into an array of objects.
Please consider following snippts
const jsonData = {"appetizer":[{"num":"appetizer1","name":"salad","condition":["1","2"],"image":"./appetizer/salad.png"},{"num":"appetizer2","name":"soup","condition":["2","3"],"image":"./appetizer/soup.png"}],"main":[{"num":"main1","name":"beef","condition":["1"],"image":"./main/beef.png"},{"num":"main2","name":"fish","condition":["2","3"],"image":"./main/fish.png"}]};
const filteredValues = Object.values(jsonData)
.flat()
.filter(o => o.condition.includes('2'))
.map(({name, image}) => ({ name, image }));
console.log(filteredValues);
The output of the above code will be an array of objects having the following structure
[{
"name": SOME_NAME,
"image": SOME_PATH
},
{
"name": SOME_NAME,
"image": SOME_PATH
},
...
]
You can use the above array to retrieve your image path and display it accordingly.
I think you shouldn't be worried about base64 as images are stored locally and path will be sufficient to display the image.
Hope this will help!!!
Side Note: You can avoid the Array#flat part as you are already doing it manually [...JsonData["apptizer"], ...JsonData["main"]] but flat will be handy in case there are more keys in jsonData that need to be considered.
For Example:
My Db stores following Json. Form Following json I need to extract the value of particular field.
"student": [
{
"name": "Xyz",
"college": "abc",
"student_id":{
"$oid": "59a9314f6d0000920962e247"
}},
{
"name": "DDD",
"college": "opop",
"student_id":{
"$oid": "59a9314f6d0000920962e257"
}}
]
How can I pick only the value of "$oid" and save json in following way:
"student": [
{
"name": "Xyz",
"college": "abc",
"student_id":
"59a9314f6d0000920962e247"
},
{
"name": "DDD",
"college": "opop",
"student_id":
"59a9314f6d0000920962e257"
}
]
In my scenario, I'm reading it from client side as -
String Json = null;
JsonNode body = request().body().asJson();
Json = body.toString();
Logger.info(Json);
String role = body.get("role").get("role").asText();
users.firstName = body.get("firstName").asText();
users.lastName = body.get("lastName").asText();
You need to change the definition of JsonNode body = request().body().asJson(); and the other code as per your scenario to get it from db.
You will need to replace "student_id" jsValue with string value as below:
val original: JsValue = Json.parse(
""" {"student": [
{
"name": "Xyz",
"college": "abc",
"student_id":{
"$oid": "59a9314f6d0000920962e247"
}},
{
"name": "DDD",
"college": "opop",
"student_id":{
"$oid": "59a9314f6d0000920962e257"
}}
]}""")
val changed = original.as[JsObject] ++ Json.obj(
"student" -> Json.arr {
original.transform((__ \ 'student)
.json.pick[JsArray])
.getOrElse(Json.arr())
.value.map(e => {
val value = e.transform((__ \ 'student_id \ '$oid).json.pick[JsString]).get
e.as[JsObject] ++ Json.obj("student_id" -> value)
})
})
println(Json.stringify(changed))
//Result:
{"student":[[{"name":"Xyz","college":"abc","student_id":"59a9314f6d0000920962e247"},{"name":"DDD","college":"opop","student_id":"59a9314f6d0000920962e257"}]]}
I'd like to be able to search the following JSON object for objects containing the key 'location' then get in return an array or json object with the 'name' of the person plus the value of location for that person.
Sample return:
var matchesFound = [{Tom Brady, New York}, {Donald Steven,Los Angeles}];
var fbData0 = {
"data": [
{
"id": "X999_Y999",
"location": "New York",
"from": {
"name": "Tom Brady", "id": "X12"
},
"message": "Looking forward to 2010!",
"actions": [
{
"name": "Comment",
"link": "http://www.facebook.com/X999/posts/Y999"
},
{
"name": "Like",
"link": "http://www.facebook.com/X999/posts/Y999"
}
],
"type": "status",
"created_time": "2010-08-02T21:27:44+0000",
"updated_time": "2010-08-02T21:27:44+0000"
},
{
"id": "X998_Y998",
"location": "Los Angeles",
"from": {
"name": "Donald Steven", "id": "X18"
},
"message": "Where's my contract?",
"actions": [
{
"name": "Comment",
"link": "http://www.facebook.com/X998/posts/Y998"
},
{
"name": "Like",
"link": "http://www.facebook.com/X998/posts/Y998"
}
],
"type": "status",
"created_time": "2010-08-02T21:27:44+0000",
"updated_time": "2010-08-02T21:27:44+0000"
}
]
};
#vsiege - you can use this javascript lib (http://www.defiantjs.com/) to search your JSON structure.
var fbData0 = {
...
},
res = JSON.search( fbData0, '//*[./location and ./from/name]' ),
str = '';
for (var i=0; i<res.length; i++) {
str += res[i].location +': '+ res[i].from.name +'<br/>';
}
document.getElementById('output').innerHTML = str;
Here is a working fiddle;
http://jsfiddle.net/hbi99/XhRLP/
DefiantJS extends the global object JSON with the method "search" and makes it possible to query JSON with XPath expressions (XPath is standardised query language). The method returns an array with the matches (empty array if none were found).
You can test XPath expressions by pasting your JSON here:
http://www.defiantjs.com/#xpath_evaluator