/**
* Returns the class this method was called 'framesToSkip' frames up the caller hierarchy. JDK
* used to have {@link sun.reflect.Reflection#getCallerClass(int)} until jdk 1.8 build 87. So we
* have to resort to slow stack unwinding.
*
* <p>NOTE: <b>Extremely expensive! Please consider not using it. These aren't the droids you're
* looking for!</b>
*/
@SuppressWarnings("JavadocReference")
@Nullable
public static Class getCallerClass(int framesToSkip) {
int frames = framesToSkip;
StackTraceElement[] stackTrace = new Throwable().getStackTrace();
String className = null;
for (int i = 1; i <= frames; i++) {
if (i >= stackTrace.length) {
break;
}
StackTraceElement element = stackTrace[i];
className = element.getClassName();
if (className.equals("java.lang.reflect.Method")
|| className.equals("sun.reflect.NativeMethodAccessorImpl")
|| className.equals("sun.reflect.DelegatingMethodAccessorImpl")) {
frames++;
continue;
}
if (i == frames) {
break;
}
}
if (className == null) {
// some plugins incorrectly expect not-null class too far up the caller chain,
// so provide some not-null class for them
className = ReflectionUtil.class.getName();
}
try {
return Class.forName(className);
} catch (ClassNotFoundException ignored) {
}
ClassLoader pluginClassLoader = PLUGIN_CLASS_LOADER_DETECTOR.fun(className);
if (pluginClassLoader != null) {
try {
return Class.forName(className, false, pluginClassLoader);
} catch (ClassNotFoundException ignored) {
}
}
LOG.error(
"Could not load class '"
+ className
+ "' using classLoader "
+ ReflectionUtil.class.getClassLoader()
+ "."
+ (stackTrace[1].getClassName().equals("com.intellij.openapi.util.IconLoader")
? " Use getIcon(String, Class) instead."
: ""));
return null;
}
