如何避免重复复杂的catch块 [英] How to avoid duplicating complicated catch blocks

问题描述

我有这段代码：

try {
    do_stuff();
    return do_more_stuff();
} catch (UnsupportedEncodingException e) {
    throw CustomException.programmer_error(e);
} catch (ProtocolException e) {
    throw CustomException.programmer_error(e);
} catch (MalformedURLException e) {
    throw CustomException.programmer_error(e);
} catch (SocketTimeoutException e) {
    throw new CustomException(e);
} catch (IOException e) {
    throw CustomException.unexpected_error(e);
}

我现在需要在另一个类似函数中拥有所有这些catch块。这里避免重复的最佳方法是什么？

I now need to have all those catch blocks in another similar function. What is the best way to avoid duplication here?

请注意，两个try块中的代码不是很相似。

Note that the code inside the two try blocks is not very similar.

此外，我无法真正把这些捕获量提高。

Also I can't really put the set of catches higher up.

注意，我宁愿避免：

try {
    do_stuff();
    return do_more_stuff();
} catch (Exception e) {
    handle_exception_via_rtti(e);
}

推荐答案

我个人试着制作

do_stuff();
return do_more_stuff();

部分符合更通用的格式以应用策略（作为模式）。

part conform to a more general format in order to apply Strategy (as a pattern).

然后你可以重构你调用这种块的所有地方，这样他们就可以调用一个更通用的块（捕获只被布置一次）。

Then you can refactor all the places where you call this kind of block so that they can call a more generalized block (where the catches are laid out just once).

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