MethodParameter should not be equal to SynthesizingMethodParameter [SPR-14438]

[spring-projects-issues]

Juergen Hoeller opened SPR-14438 and commented

MethodParameter.equals historically just checks instanceof MethodParameter. With the introduction of SynthesizingMethodParameter in 4.2, we need to insist on the same class there: Otherwise, a MethodParameter would be considered as equal to a SynthesizingMethodParameter for the same target declaration.

---

Affects: 4.2.7, 4.3.1

Issue Links:

• Introduce support for creating a MethodParameter from a Java 8 Parameter [SPR-14055] #18627 Introduce support for creating a MethodParameter from a Java 8 Parameter

Referenced from: commits 39e3f2e, dd65689

[spring-projects-issues]

Juergen Hoeller commented

It turns out that we actually want MethodParameter equality to be based on the same target declaration, e.g. for hash lookups where MethodParameter subclasses should be transparent.