签入范围前提 [英] Check in range precondition

问题描述

我喜欢番石榴的前提条件，但我真正需要的是另一种方法-检查数字是否在范围内.像这样的smt

I like guava preconditions, but what I really need from it is one more method - check that the number is in range. Smt like this

//probably there should be checkStateInRange also
public static void checkArgumentInRange(double value, int min, int max) {
    if (value < min || value > max) {
        throw new IllegalArgumentException(String.format("%s must be in range [%s, %s]", value, min, max));
    }
}

我相信我并不孤单，这是很常见的情况.但是这种方法不存在.是否有任何理由不将此类方法放在com.google.common.base.Preconditions中?

I believe I'm not alone and it's a pretty common case. But such method doesn't exist. Is there any reasons to not put such methods in com.google.common.base.Preconditions?

推荐答案

我会说很多原因.这里是主要的:

There are quite a few reasons I'd say. Here are the main ones:

• 对于值超出范围"，没有标准的Java异常类型.请注意，每个Preconditions方法都会为其检查的内容抛出特定的异常类型:NullPointerException，IllegalArgumentException，IllegalStateException或IndexOutOfBoundsException.广义范围检查没有比IllegalArgumentException更具体的异常了.
• checkArgument和checkState可以满足您的所有需求.您可以只写checkArgument(value >= min && value <= max, ...).您正在检查的内容非常简单明了.

• There's no standard Java exception type for "value out of range". Note that each of the Preconditions methods throws a specific exception type for what it checks: NullPointerException, IllegalArgumentException, IllegalStateException or IndexOutOfBoundsException. A generalized range check would have no exception more specific than IllegalArgumentException to throw.
• checkArgument and checkState do everything you need. You can just write checkArgument(value >= min && value <= max, ...). It's simple and obvious what you're checking.

另外:

• 您可能想要在这里有太多不同的组合. @rsp提及的互斥/包容边界，等等.
• 这是限制，只允许int作为边界，因此您真的很想在那里允许任何Comparable.
• 此时，您注意到您只是在检查值是否包含在

• There are too many different combinations you might want here. Exclusive/inclusive bounds as @rsp mentions, etc.
• It's limiting to only allow ints for the bounds, so you would really like to allow any Comparable there.
• At this point you notice you're just checking if the value is contained in a Range.

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