Guava's functional primitives can be replaced with Java

Reports usages of Guava's functional primitives that can be migrated to standard Java API calls.

For example, the inspection reports usages of classes and interfaces like FluentIterable, Optional, Function, Predicate, or Supplier.

Example:

ImmutableList<String> results = FluentIterable.from(List.of(1, 2, 3)).transform(Object::toString).toList();

After the quick-fix is applied:

List<String> results = List.of(1, 2, 3).stream().map(Object::toString).collect(Collectors.toList());

The quick-fix may change the semantics. Some lazy-evaluated Guava's iterables can be transformed to eager-evaluated.

This inspection only reports if the language level of the project or module is 8 or higher.

Inspection options

Option	Type	Default
Report variables	Checkbox	true
Report method chains	Checkbox	true
Report return types	Checkbox	true
Erase @javax.annotations.Nullable from converted functions	Checkbox	true

Inspection Details
Available in:	IntelliJ IDEA 2023.3, Qodana for JVM 2023.3
Plugin:	Java, 233.SNAPSHOT

Last modified: 13 July 2023