[英]Use GIN to inject a Generics factory of ListEditor
我寫了一個工廠,可以創建任何類型的ListEditor:
public interface ListEditorFactory<T, E extends Editor<T>> {
ListEditor<T, E> create(InsertPanel panel);
}
及其實現:
public class ListEditorFactoryImpl<T, E extends Editor<T> & IsWidget> implements ListEditorFactory<T, E> {
private final Provider<E> editorProvider;
@Inject
public ListEditorFactoryImpl(Provider<E> editorProvider) {
this.editorProvider = editorProvider;
}
@Override
public ListEditor<T, E> create(final InsertPanel panel) {
return ListEditor.of(new EditorSource<E>() {
@Override
public E create(int index) {
final E e = editorProvider.get();
panel.add(e.asWidget());
return e;
}
@Override
public void dispose(E e) {
e.asWidget().removeFromParent();
}
@Override
public void setIndex(E editor, int index) {
panel.insert(editor.asWidget(), index);
}
});
}
}
如果我直接用Gin注入的Provider實例化工廠,則效果很好:
ListEditor<NoteDTO, CharacterNoteScreen> notesEditor;
@Inject @UiField(provided = true) FlowPanel notePanel;
@Inject
protected void init(Provider<CharacterNoteScreen> characterNoteProvider) {
final ListEditorFactory<NoteDTO, CharacterNoteScreen> listEditorFactory = new ListEditorFactoryImpl<NoteDTO, CharacterNoteScreen>(characterNoteProvider);
notesEditor = listEditorFactory.create(notePanel);
但是,如果我想像這樣注入整個ListEditorFactory:
@Inject
protected void init(ListEditorFactory<NoteDTO, CharacterNoteScreen> listEditorFactory) {
notesEditor = listEditorFactory.create(notePanel);
杜松子酒抱怨一個簡單的bind(ListEditorFactory.class).to(ListEditorFactoryImpl.class);
捆綁:
[ERROR] Generator 'com.google.gwt.inject.rebind.GinjectorGenerator' threw an exception while rebinding 'net.test.client.MyGinjector'
com.google.inject.ConfigurationException: Guice configuration errors:
1) javax.inject.Provider<E> cannot be used as a key; It is not fully specified.
我嘗試使用bind(new TypeLiteral<ListEditorFactory<?, ?>>() {}).to(new TypeLiteral<ListEditorFactoryImpl<?, ?>>() {});
但是得到了
java.lang.IllegalArgumentException: Expected a Class, ParameterizedType, or GenericArrayType, but <?> is of type com.google.inject.internal.MoreTypes$WildcardTypeImpl
綁定bind(new TypeLiteral<ListEditorFactory<NoteDTO, CharacterNoteScreen>>() {}).to(new TypeLiteral<ListEditorFactoryImpl<NoteDTO, CharacterNoteScreen>>() {});
正在運作,但通用工廠失去了很多興趣。
您知道聲明此綁定的通用方法嗎?
謝謝
我設法擺脫了ListEditorFactory
接口,找到了一個解決方案,不再需要在gin模塊中聲明綁定。
我可以直接注入實現而沒有任何問題:
@Inject
protected void init(ListEditorFactoryImpl<NoteDTO, CharacterNoteScreen> listEditorFactory) {
notesEditor = listEditorFactory.create(notePanel);
如果杜松子酒能夠注入這個,我沒有理由不能通過接口注入它,但是綁定聲明錯誤。
因此,即使我對自己的解決方案感到滿意,我也會打開問題,因為這可能是聲明綁定的一種方式。
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.