[FLINK-7450] Bounded generic POJO field is identified as Object by TypeExtractor

• Type: Bug
• Status: Open
• Priority: Not a Priority
• Resolution: Unresolved
• Affects Version/s: 1.3.2, 1.4.0
• Component/s: API / Type Serialization System
• Labels: auto-deprioritized-major auto-deprioritized-minor auto-unassigned pull-request-available
• Assignee: Unassigned
• Reporter: Timo Walther
• Created: 15/Aug/17 10:00
• Updated: 01/Jan/22 10:39

Description

The TypeExtractor does not correctly handle POJO fields with bounded generics.

For example:

public class Foo<SomeKey extends BarKey> implements Serializable {

    public SomeKey someKey;

    public Foo() {}

    public Foo(SomeKey someKey) {
        this.someKey = someKey;
    }
}

Is identified as:

PojoType<org.apache.flink.streaming.examples.wordcount.WordCount$Foo, fields = [someKey: GenericType<java.lang.Object>]>

So even though the reflection field has a type, the type information only describes a Object class.

Issue Links

• links to: GitHub Pull Request #6034
• links to: GitHub Pull Request #6034