sun.reflect.CallerSensitive注释是什么意思？

问题描述

@CallerSensitive 注释上面的方法是什么意思？

What is implied by @CallerSensitive annotation above methods?

例如，注释存在于getClassLoader方法

For example,the annotation is present in getClassLoader method of Class

 @CallerSensitive
    public ClassLoader getClassLoader() {
    //
    }

推荐答案

根据JEP还），

如果你看一下 Class＃forName（String）的实现

@CallerSensitive
public static Class<?> forName(String className)
            throws ClassNotFoundException {
    return forName0(className, true,
                    ClassLoader.getClassLoader(Reflection.getCallerClass()));
}

，您会注意到它正在使用。如果我们看看那个方法

, you notice that it is using Reflection.getCallerClass(). If we look at that method

@CallerSensitive
public static native Class getCallerClass();

问题似乎在这个JEP之前是，如果调用者敏感方法是通过反射调用而不是直接地，必须有一个复杂的过程来识别实际的调用类是什么。这是有问题的，如果方法通过反射调用。使用 @CallerSensitive 建议（并介绍）一个更简单的过程。

The problem, it seems, before this JEP, was that if the caller sensitive method was called through reflection instead of directly, there had to be a complex process to identify what the actual calling class was. This was problematic if the method was invoked through reflection. A simpler process was proposed (and introduced) with @CallerSensitive.

基本上， @CallerSensitive 注释由JVM使用

Basically, the @CallerSensitive annotation is used by the JVM

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