Reduce cognitive load when parsing Java code by folding some verbose syntax.

Reduces usages of functional interfaces (interfaces annotated with @FunctionalInterface) to what you would expect when you come from a language like Python.

Function<Baz,Buzz> f=foo::bar;
f.apply(baz); // unfolded
f(baz);       // folded
        
Predicate<String> isBlank=String::isBlank;
if(isBlank.test("not blank")) { … } // unfolded
if(isBlank("not blank")) { … }      // folded

Note, only the sole non-default and non-static method of a functional interface is folded.

Removes visual noise from constructor calls.

new Foo(bar, baz); // unfolded
Foo(bar, baz);     // folded

new Foo<>(bar, baz); // unfolded
Foo⋄(bar, baz);      // folded

new com.example.Foo<String>(bar, baz); // unfolded
…Foo⋄(bar, baz);                       // folded

Folds (simple) express-json compositions into something that looks like JSON.

new Object(
    new Member("a", "b"),
    new Member("c", new Array(1, 2, 3))
); // unfolded

{
    "a": "b",
    "c": [1, 2, 3]
}; // folded

Folds log statements and consumers into a "comment". This reduces distraction and helps to focus on the actual functionality.

log.trace("some trace log"); // unfolded
/*log*/ // folded
        

rxflowable
    .map(mapFunction)
    .doOnNext(value -> log.trace("next value was {}", value)) // unfolded
    .subscribe(subscriber);

rxflowable
    .map(mapFunction)
    .doOnNext(/*log*/) // folded
    .subscribe(subscriber);

Readable calls to compareTo

foo.compareTo(baz) < 0 // unfolded
foo < baz              // folded

Copyright 2023 dmfs GmbH

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an " AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.