microsoftgraph / microsoftgraph/msgraph-sdk-java

SDK NullPointerException due to missing @odata.type field during select query

Open
#2,587 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

status:waiting-for-triage type:bug
Dominant language
Java
Stars
444
Forks
154
Avg merge
18h 28m
Merged PRs (30d)
4

Description

Describe the bug

During a select query for users, mapping them to the User class fails with following NPE

java.lang.NullPointerException: parameter node cannot be null
	at java.util.Objects.requireNonNull(Objects.java:246)
	at io.kiota.serialization.json.JsonParseNode.<init>(JsonParseNode.java:38)
	at io.kiota.serialization.json.JsonParseNodeFactory.createJsonParseNode(JsonParseNodeFactory.java:32)
	at io.kiota.serialization.json.JsonParseNode.getChildNode(JsonParseNode.java:48)
	at com.microsoft.graph.models.User.createFromDiscriminatorValue(User.java:30)
	at io.kiota.serialization.json.JsonParseNode.getObjectValue(JsonParseNode.java:248)
	at io.kiota.serialization.json.JsonParseNode.getCollectionOfObjectValues(JsonParseNode.java:219)
	at com.microsoft.graph.models.UserCollectionResponse.lambda$getFieldDeserializers$0(UserCollectionResponse.java:34)
	at io.kiota.serialization.json.JsonParseNode.assignFieldValues(JsonParseNode.java:301)
	at io.kiota.serialization.json.JsonParseNode.getObjectValue(JsonParseNode.java:249)
	at com.microsoft.kiota.http.OkHttpRequestAdapter.send(OkHttpRequestAdapter.java:322)
	at com.microsoft.graph.groups.item.members.graphuser.GraphUserRequestBuilder.get(GraphUserRequestBuilder.java:70)
Expected behavior

The user(s) should be selected by the query, mapped and returned in a response object

How to reproduce

Code snippet to reproduce:

final String groupId = "test group id";
final GraphUserRequestBuilder request = client.groups()
                .byGroupId(groupId)
                .members()
                .graphUser()
                .get(req -> {
                    req.queryParameters.select = "id,name,mail";
                    req.queryParameters.filter = "id in (1,2,3)";
                    req.queryParameters.count = true;
                    req.headers.add("ConsistencyLevel", "eventual");
                    }
                })

Code snippet to reproduce the NPE with the JsonNode

import com.fasterxml.jackson.databind.node.JsonNodeFactory;
import com.fasterxml.jackson.databind.node.ObjectNode;
import io.kiota.serialization.json.JsonParseNode;
import io.kiota.serialization.json.JsonParseNodeFactory;

class Scratch {
    static void main() {
        try {
            var a = new JsonParseNode(new JsonParseNodeFactory(), new ObjectNode(new JsonNodeFactory(false)));
            var b = a.getChildNode("@odata.type");
        } catch (NullPointerException e) {
            System.out.println("Exception!");
        }
    }
}

Replicating this code in Graph UI returns following example response:

{
    "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users(id,name,mail)",
    "@odata.count": 2,
    "value": [
        {
            "id": "id 1",
            "name": "name 1",
            "mail": "mail 1"
        },
        {
            "id": "id 2",
            "name": "name 2",
            "mail": "mail 2"
        }
    ]
}

Which then leads to the NPE as the SDK is expecting @odata.type field being set here

https://github.com/microsoftgraph/msgraph-sdk-java/blob/main/src/main/java/com/microsoft/graph/generated/models/User.java

@jakarta.annotation.Nonnull
    public static User createFromDiscriminatorValue(@jakarta.annotation.Nonnull final ParseNode parseNode) {
        Objects.requireNonNull(parseNode);
        final ParseNode mappingValueNode = parseNode.getChildNode("@odata.type"); <- NPE being caused here
        if (mappingValueNode != null) {
            final String mappingValue = mappingValueNode.getStringValue();
            switch (mappingValue) {
                case "#microsoft.graph.agentUser": return new AgentUser();
            }
        }
        return new User();
    }
SDK Version

6.63.0

Latest version known to work for scenario above?

6.62.0

Known Workarounds

No response

Debug output
Click to expand log ```
</details>


### Configuration

_No response_

### Other information

_No response_

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with User.createFromDiscriminatorValue in src/main/java/com/microsoft/graph/generated/models/User.java and trace JsonParseNode.getChildNode for the missing @odata.type field. Reproduce the issue with the provided select query or JsonNode snippet, then verify that users containing only id, name, and mail are mapped and returned without a NullPointerException.

Written by the indexing model from the issue text.

Assessment

Tech stack
java
Domain
api
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
68/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.