有没有办法根据某些条件递归调用Rythm模板？(Is there any way to recursively invoke a Rythm template based on some condit

有没有办法根据某些条件递归调用Rythm模板？(Is there any way to recursively invoke a Rythm template based on some condition?)

我目前正在使用Rythm创建一些片段 - 与AST结合使用，因为模板依赖于Java文件。

调用模板按预期工作。 有一个意外的行为。 我想以递归方式调用模板，但似乎这是不可能的。

Foo.html模板

@args String someString, boolean recursion Calling foo template with recursion: @recursion @if(recursion) { A recursion was requested: @recursion @foo(someString, false) }

请注意 ，根据此示例的意图，这仅提供1级递归。 但是，我想稍后在@foo(someString, false)行中使用条件而不是false 。

您可以通过简单地将提供的示例复制并粘贴到foo.html来尝试此处的代码段。

错误信息

The method foo(String, boolean) is undefined for the type Cfoo_html__R_T_C__ Template: /foo.html Relevant template source lines: ------------------------------------------------- 1: @args String someString, boolean recursion 2: 3: Calling foo template with recursion: @recursion 4: @if(recursion) { 5: A recursion was requested: @recursion >> 6: @foo(someString, false) 7: } /* * Omitted for the sake of readability. */

现在，错误似乎与递归无关。 虽然，这是我在Eclipse中看到的错误消息。

我想，在调用模板时，不可能在其自身内调用它，因为Rythm只查找其他模板 - 或者看起来如此。

使用上面的链接访问Rythm Fiddle ，将代码放在bar.html而不是foo.html - 将@foo(someString, false) 第6行更改为@bar(someString, false) 。

现在， foo.html下行放在foo.html ：

@bar("foo", true)

执行此操作时，错误将更改为：

java.lang.SecurityException: java.util.concurrent.TimeoutException

我认为这证明了我的上述假设，因为Rythm现在似乎找到了模板（或方法，即）。 这基本上就是我被困住的地方。

所以，问题是： 有没有办法根据某些条件递归调用Rythm模板？

我也对其他建议持开放态度，因为递归通常可以以非递归的方式处理。 我只是想避免重复的代码。

I'm currently using Rythm to create some snippets - in combination with AST, as the templates depend on Java files.

Invoking templates works as expected. With one unexpected behaviour. I'd like to invoke a template recursively, but it seems this is not possible.

Foo.html Template

@args String someString, boolean recursion Calling foo template with recursion: @recursion @if(recursion) { A recursion was requested: @recursion @foo(someString, false) }

Note this provides only 1 level of recursion, as per intention for this example. However, I'd like to use a condition instead of false within the @foo(someString, false) line later on.

You can try the snippet here by simply copying & pasting the provided example into foo.html.

Error Message

The method foo(String, boolean) is undefined for the type Cfoo_html__R_T_C__ Template: /foo.html Relevant template source lines: ------------------------------------------------- 1: @args String someString, boolean recursion 2: 3: Calling foo template with recursion: @recursion 4: @if(recursion) { 5: A recursion was requested: @recursion >> 6: @foo(someString, false) 7: } /* * Omitted for the sake of readability. */

Now, the error seems not recursion related. Though, it is the error message I'm seeing in Eclipse.

I guess, when invoking a template it is not possible to invoke it within itself, because Rythm only looks for other templates - or so it seems.

Use the link above to access Rythm Fiddle, put the code inside bar.html instead of foo.html - change line #6 from @foo(someString, false) to @bar(someString, false).

Now, put the following line inside of foo.html:

@bar("foo", true)

When doing so, the error changes to:

java.lang.SecurityException: java.util.concurrent.TimeoutException

I think this proves my assumption above, as Rythm now seems to find the template (or method, that is). And this is basically where I'm stuck.

So, the question is: is there any way to recursively invoke a Rythm template based on some condition?

I'm also open for other suggestions, as recursions usually can be handled in a non-recursive way. I just want to avoid duplicate code.

最满意答案

Rythm支持@this()指令以递归方式加载模板。 见http://play-rythm-demo.appspot.com/demo/fibonacci

但是看起来有一个bug被引入，现在即使指定了terminate条件，它也会引发StackOverflowError 。 请将错误报告提交至https://github.com/rythmengine/rythmengine/issues

更新

StackOverflowError由boolean类型引起。 如果使用其他类型的变量来控制递归调用的终止，它的效果都很好。

@args String foo, int i <h1>@foo</h1> Calling foo template with recursion: @i @if(i > 1) { A recursion was requested: @i @this({foo: foo, recursion: false, i: (i - 1)}) }

以下是对节奏小提琴的测试

Rythm support @this() directive to load the template in a recursive way. See http://play-rythm-demo.appspot.com/demo/fibonacci

However it looks like there is a bug introduced and now it will raise StackOverflowError even when the terminate condition is specified. Please submit a bug report to https://github.com/rythmengine/rythmengine/issues

Updates

The StackOverflowError is caused by boolean type. It works all good if using other type of variable to control the termination of recursive call.

@args String foo, int i <h1>@foo</h1> Calling foo template with recursion: @i @if(i > 1) { A recursion was requested: @i @this({foo: foo, recursion: false, i: (i - 1)}) }

Below is the test done on rythm fiddle