in ttl-agent/src/main/java/com/alibaba/ttl3/agent/TtlExtensionTransformletManager.java [131:152]
static Map<String, TtlTransformlet> childClassLoaderFirstMergeTransformlets(
Map<ClassLoader, Map<String, TtlTransformlet>> classLoader2Transformlet, ClassLoader classLoader
) {
Map<String, TtlTransformlet> ret = new HashMap<>();
final ArrayDeque<ClassLoader> chain = new ArrayDeque<>();
chain.add(classLoader);
while (classLoader.getParent() != null) {
classLoader = classLoader.getParent();
chain.addFirst(classLoader);
}
for (ClassLoader loader : chain) {
final Map<String, TtlTransformlet> m = classLoader2Transformlet.get(loader);
if (m == null) continue;
ret.putAll(m);
}
return ret;
}