[WICKET-5795] LoadableDetachableModel/AbstractReadOnlyModel .of(Supplier<T>) to support convenient lambda instantiation in Java8

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: 6.18.0
• Component/s: wicket
• Assignee: Unassigned
• Reporter: Hendy Irawan
• Created: 27/Dec/14 23:57
• Updated: 19/Jan/15 17:24
• Resolved: 19/Jan/15 17:24

Description

I propose adding static method LoadableDetachableModel/AbstractReadOnlyModel .of(Supplier<T>) so this can be used to quickly create ad-hoc models in Java8 using lambda syntax. (but does not require Java8 in any way). Supplier is from Guava library.

Sample usage:

add(new Label("slug", 
    LoadableDetachableModel.of( () -> personRepo.slugFor(getModelObject()) )));

Similar approach for other abstract classes can also be useful for implementing typically single methods like onSubmit, onClick, onConfigure, etc.