Introduce general purpose isEmpty() method in ObjectUtils [SPR-13119]

[spring-projects-issues]

Sam Brannen opened SPR-13119 and commented

Status Quo

Currently, there are several isEmpty() methods scattered across various utilities within Spring such as ObjectUtils, CollectionUtils, and StringUtils; however, each of these methods typically requires a cast to the type supported for that particular variant. Consequently, there is no general purpose catch-all isEmpty() method for checking whether an object is empty without knowing its concrete type.

Deliverables

1. Introduce a general-purpose isEmpty(Object) method in ObjectUtils that supports multiple object types in a central location and transparently delegates to existing functionality in ObjectUtils, CollectionUtils, and StringUtils.

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Referenced from: commits 05de9a8

[spring-projects-issues]

Sam Brannen commented

Completed as described in GitHub commit 05de9a8:

Introduce general purpose isEmpty() method in ObjectUtils

Prior to this commit, there existed several isEmpty() methods scattered
across various utilities such as ObjectUtils, CollectionUtils, and
StringUtils; however, each of these methods requires a cast to the type
supported for that particular variant.

This commit introduces a general-purpose isEmpty(Object) method in
ObjectUtils that transparently supports multiple object types in a
central location without the need for casts or juggling multiple
utility classes.