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Can't deserialize JSON array into class org

I want to make a string from json into an object of my class. The problem is, in the class I use an ArrayList and that's why (I think) I get the error message "Can't deserialize JSON array into class". How exactly can I separate the array and convert it into an ArrayList?
#POST
public Response createMocktail(String m){
MocktailDto mocktail = jsonb.fromJson(m, MocktailDto.class);
return Response.ok(mocktailManager.createMocktail(mocktail)).build();
}
Json String:
[
{
"id": 3,
"name": "Mojito",
"zutaten": [
{
"anzahl": 1,
"id": 5,
"name": "Rum"
},
{
"anzahl": 1,
"id": 6,
"name": "GingerAle"
}
]
}
]
JSONObject jsonObj = new JSONObject(m); does not work, it says constructor is undefined although I saw a few solutions like this

The problem is your input string is Array (when it starts with [)
There are a few possible solutions:
First:
MocktailDto[] data = jsonb.fromJson(m, MocktailDto[].class);
data[0];
Second:
Type listType = new TypeToken<ArrayList<MocktailDto>>(){}.getType();
ArrayList<MocktailDto> data = jsonb.fromJson(m, listType);
data.get(0);

In Java's MongoDB driver, how do I update a document within a list of documents?

I have a document already in the database that can be represented as follows:
{
_id: 1,
field1: "hello"
field2: 2,
listField: [
{
subField1: ...,
subField2: ...
},
{
subField1: ...,
subField2: ...
}
]
}
I have constructed another document that will be used to update the document with an id of 1. It can be represented as follows:
Document newDocument = {
field1: "goodbye",
field3: 3,
listField: [
{
subfield3: ...
},
{
subfield3: ...
}
]
}
The expected result is as follows:
{
_id: 1,
field1: "goodbye"
field2: 2,
field3: 3,
listField: [
{
subField1: ...,
subField2: ...,
subField3: ...
},
{
subField1: ...,
subField2: ...,
subField3: ...
}
]
}
How can this be accomplished using the Java driver? I had previously attempted to accomplish this with
collection.updateOne(Filters.eq("_id", new ObjectId(1)), new Document("$set", newDocument));
However, this method produces the following result instead:
{
_id: 1,
field1: "goodbye"
field2: 2,
field3: 3,
listField: [
{
subField3: ...
},
{
subField3: ...
}
]
}
The issue with this is that the listField field is being replaced with the new field. I want each document within listField to be updated with the new sub fields instead. What should I be doing differently to accomplish this?

How to use elemMatch in Springboot to query an element of an array such that the array has just one column and the column has no field name?

The table I am having is of the following form
{
"element_1": 1,
"element_2": 1,
"elements":[
"ele_1", "ele_2", "ele_3", "ele_4"
]
},
{
"element_1":2,
"element_2":2,
"elements":[
"ele_5", "ele_6", "ele_7", "ele_8"
]
},
{
"element_1": 3,
"element_2": 3,
"elements": [
"ele_9", "ele_10", "ele_11", "ele_12"
]
}
Over here I wanted to query out the document having the element ele_1 in the elements field so that on using the java command
Query query = new Query("Required Criteria");
the document which should get returned should be
{
"element_1": 1,
"element_2": 1,
"elements":[
"ele_1", "ele_2", "ele_3", "ele_4"
]
}
I would like to mention again that the arrays in the field "elements" have no field name hence providing a key parameter while building the Criteria object is not possible. How to get the required result?

you can simply write :
Query query = new Query("{'elements' : 'ele_1'}");
You dont need $elemMatch

Ignore specific attribute/fields in jsonassert

I need to compare two json strings by ignore some fields
I am currently using JSONAssert from org.SkyScreamer to do the comparison but does not ignore any attributes.
Json 1 :
{
"contributions": [
[
{
"order" : 1,
"contributorId" : "1980"
}
]
]
}
Json 2 :
{
"contributions": [
[
{
"order": 1,
"contributorId" : "5789"
}
]
]
}
ArrayValueMatcher<Object> arrValMatch1 = new ArrayValueMatcher<>(new CustomComparator(
JSONCompareMode.NON_EXTENSIBLE,
new Customization("contributions[0][*].contributorId",(o1, o2) -> true)));
Customization arrayValueMatchCustomization = new Customization("contributions", arrValMatch1);
CustomComparator customArrayValueComparator = new CustomComparator(
JSONCompareMode.NON_EXTENSIBLE,
arrayValueMatchCustomization);
assertEquals(subJson1, json2, customArrayValueComparator);
I expect the above scenario should be passed. But its failing with
Exception in thread "main" java.lang.AssertionError: contributions[0][contributorId=1980]
Expected: a JSON object
but none found
; contributions[0][contributorId=5789]
Unexpected: a JSON object

Use *.contributorId instead of contributions[0][*].contributorId

Replace value particular key in a String

I have a String as below stored in datasets_detail column of table item_action_info :
[{
"datasetAttributeId": 5,
"nextUpdate": 1587546084,
"lastSuccessfulRefreshTime": 1587546084,
"refreshActionId": 2,
"errorCode": 0,
"isMFAInstanceRefreshRequired": false
}, {
"datasetAttributeId": 6,
"nextUpdate": 1587546084,
"lastSuccessfulRefreshTime": 1587546084,
"refreshActionId": 2,
"errorCode": 0,
"isMFAInstanceRefreshRequired": false
}, {
"datasetAttributeId": 8,
"nextUpdate": 1587546084,
"lastSuccessfulRefreshTime": 1587546084,
"refreshActionId": 2,
"errorCode": 0,
"isMFAInstanceRefreshRequired": false
}]
I want replace value for each occurrences of "lastSuccessfulRefreshTime".
How to i do in Java?
Below is sample piece of code. Please advice in completing the same.
String strJson =CommonUtils.clobStringConversion(resultSet.getClob("DATASETS_DETAILS"));
// complete the rest code here

If you want to manipulate it as a JSON object, then you can do it via Google GSON.
String strJson =CommonUtils.clobStringConversion(resultSet.getClob("DATASETS_DETAILS"));
Gson gson = new Gson();
List<StringMap> parsedObject = new Gson().fromJson(strJson, List.class);
// Final String
String newReplacedString = gson.toJson(parsedObject.stream().map((item) -> {
// Put your new value here
item.put("lastSuccessfulRefreshTime", "Replaced Value");
return item;
}).collect(Collectors.toList()));