有趣的是：Tapestry 提供了非常丰富的功能来覆盖默认服务行为，但在这种情况下却没有。罪魁祸首 JavaScriptSupport 是动态创建的，无法修饰。
MarkupRendererFilter javaScriptSupport = new MarkupRendererFilter() {
public void renderMarkup(MarkupWriter writer, MarkupRenderer renderer) {
DocumentLinker linker = environment.peekRequired(DocumentLinker.class);
//Surprise!;)
JavaScriptSupportImpl support = new JavaScriptSupportImpl(linker, javascriptStackSource, javascriptStackPathConstructor);
environment.push(JavaScriptSupport.class, support);
renderer.renderMarkup(writer);
environment.pop(JavaScriptSupport.class);
support.commit();
}
};
因此，唯一的方法是修补源（就像我们多次所做的那样），或者尝试覆盖作为 JavaScriptSupportImpl 的参数的 javascriptStackSource：
你的 AppModule.java
@Decorate(serviceInterface = JavaScriptStackSource.class)
public JavaScriptStackSource decorateJavaScriptStackSource(JavaScriptStackSource original) {
return new MyJavaScriptStackSource(original);
}
MyJavaScriptStackSource.java
public class MyJavaScriptStackSource implements JavaScriptStackSource {
// This bunch of stacks comes from got5
private Set<String> SKIP = new HashSet<String>(Arrays.asList("Slider", "AjaxUploadStack", "DataTableStack", "FormFragmentSupportStack", "FormSupportStack",
"SuperfishStack", "JQueryDateFieldStack", "GalleryStack"));
private class JavaScriptStackWraper implements JavaScriptStack {
private final JavaScriptStack original;
JavaScriptStackWraper(JavaScriptStack original) {
if (original != null) {
System.out.println("Wrap " + original.getClass().getName());
}
this.original = original;
}
@Override
public List<String> getStacks() {
return original != null ? original.getStacks() : Collections.<String>emptyList();
}
@Override
public List<Asset> getJavaScriptLibraries() {
return original != null ? original.getJavaScriptLibraries() : Collections.<Asset>emptyList();
}
// Always return empty list
@Override
public List<StylesheetLink> getStylesheets() {
return Collections.<StylesheetLink>emptyList();
}
@Override
public String getInitialization() {
return original != null ? original.getInitialization() : null;
}
}
private final JavaScriptStackSource original;
public MyJavaScriptStackSource(JavaScriptStackSource original) {
this.original = original;
}
@Override
public JavaScriptStack getStack(String name) {
JavaScriptStack stack = original.getStack(name);
if (!SKIP.contains(stack.getClass().getSimpleName())) {
return new JavaScriptStackWraper(stack);
}
return new JavaScriptStackWraper(null);
}
@Override
public List<String> getStackNames() {
return original.getStackNames();
}
}
这是一大段糟糕的代码，但它可以工作。我希望更好地控制我在 Tapestry 中的页面中显示的内容。