我正在研究 groovy-wicket 集成，缺少匿名内部类似乎是编写事件处理程序时的一个问题。 有没有更优雅的方式来编写这段代码
import org.apache.wicket.PageParameters
import org.apache.wicket.markup.html.basic.Label
import org.apache.wicket.markup.html.link.Link
import org.apache.wicket.markup.html.WebPage
/**
* Homepage
*/
class HomePage extends WebPage {
public HomePage(final PageParameters parameters) {
// Add the simplest type of label
add(new Label("message", "Wicket running!"));
def link1 = new ClickHandler("link1") //in java, defined inline
add(link1);
}
}
class ClickHandler extends Link{
ClickHandler(String id) {
super(id);
}
void onClick(){println "Hi"}
}
最佳答案
我可能错了，但这不是 WickeBuilder 的内容吗？试图解决:
The Wicket Builder utility implements a Groovy Builder for constructing Wicket Component trees.
While using the builder makes building Component trees easier and more clear to the reader, the original driver was the fact that Groovy does not allow anonymous inner classes. Wicket relies on overriding methods to provide custom functionality for many Component types. Groovy can be used to code Wicket page classes, but each class that is overridden needs a named class definition. Possible, but clunky.
The WicketBuilder simulates these overrides with named Closures. Closures are, essentially, portable code blocks. Under the hood, the builder creates dynamic class overrides and runs the closures when the named method is called.
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关于java - groovy中的匿名内部类，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/1442019/