java - 来自 Xpand 的 sample -

Question

我能得到一些关于 XPand 的好教程吗？我需要得到像 LET 这样的命令的信息。如果有人可以在上面发布一些示例，那就更好了。

我面临的问题是……我运行了一个“for”循环，在检查了一些条件后我需要增加一个计数器。但我做不到。当我增加计数器时，它会打印到输出文件。

提前致谢。

Answer 1

有一个worked example哪些模板 Ant 脚本。同一篇文章在 DZone 上重新发布。

更具体地说，this paper在 LET 运算符上展示了这个例子:

<<LET packageName + "." + className AS fqn>>
  the fully qualified name is: <<fqn>>;
<<ENDLET>>

最后，来自 openArchitecureWare forum 上的这篇文章:

The LET statement is really simple: it creates a local constant with the specified value and a scope in which this constant is visible. This also means that the LET statement is unusable for looping behavior.

In fact, if you try to loop, you're basically solving problems in the wrong place. XPand templates are only meant for generating textual artifacts while most logic underlying the generation should be implemented in Xtensions. Xtend does not have a loop construct either but it's possible to find an alternative if you're willing to follow the functional programming-paradigm. Also, take note of the 'indexOf' method of oaw.List.