Versions Compared

Old Version 20

changes.mady.by.user Martin Grigorov Grigorov

Saved on

compared with

New Version 21

changes.mady.by.user Martin Grigorov Grigorov

Saved on

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Provide serializable versions of java.util.function.(Supplier|Consumer|Function) WICKET-5991


java.util.function.Consumer and other classes are not serializable and this makes them unusable in stateful Wicket pages. For this reason Wicket provides org.apache.wicket.model.lambda.WicketSupplier, org.apache.wicket.model.lambda.WicketConsumer and org.apache.wicket.model.lambda.WicketFunction. Those interfaces should be used in method signatures where Java 8 lambdas or method references could be used. At the call site there is nothing specific to be done, i.e. just use lambdas and method references without any casting.

 

Provide IModel implementations which make use of Java 8 lambdas and method references WICKET-5991

 

Wicket provides three new implementations of IModel which use Java 8 consumers and suppliers, i.e. may be used with lambda or method references.

  • org.apache.wicket.model.lambda.LambdaModel.

    Code Block
    languagejava
    titleLambdaModel
    collapsetrue
    Person person = ...;
IModel<String> personNameModel = new LambdaModel<>(
      () -> person.getName(),
      (name) -> person.setName(name));

  • org.apache.wicket.model.lambda.SupplierModel. It is similar to org.apache.wicket.model.AbstractReadOnlyModel.

    Code Block
    languagejava
    titleSupplierModel
    collapsetrue
    Person person = ...;
IModel<String> personNameModel = new SupplierModel<>(person::getName);

  • org.apache.wicket.model.lambda.SupplierCachingModel. It is similar to org.apache.wicket.model.LoadableDetachableModel 

    Code Block
    languagejava
    titleSupplierCachingModel
    collapsetrue
    Person person = ...;
IModel<String> personNameModel = new SupplierCachingModel<>(person::getName);

IGenericComponent is a mixin/trait interface WICKET-6117

 

IGenericComponent uses Java 8 default methods to implement #setModel(IModel<T>), #getModel(), #setModelObject(T) and #getModelObject() by delegating to the respective get/setDefaultModel[Object] methods.

This way it could be easily used by any Component by just implementing it.

...