lucky-xin edited a comment on issue #54:
URL:
https://github.com/apache/dubbo-hessian-lite/issues/54#issuecomment-986413418
如果类定义了writeReplace方法，那么在创建JavaSerializer时会遍历类获取writeReplace方法
```java
private Method _writeReplace;
public JavaSerializer(Class cl, ClassLoader loader) {
introspectWriteReplace(cl, loader);// 这里初始化_writeReplace
if (_writeReplace != null)
_writeReplace.setAccessible(true);
}
```
然后在序列化时就执行以下代码
```java
@Override
public void writeObject(Object obj, AbstractHessianOutput out)
throws IOException {
if (out.addRef(obj)) {
return;
}
Class cl = obj.getClass();
try {
if (_writeReplace != null) {
Object repl;
if (_writeReplaceFactory != null)
repl = _writeReplace.invoke(_writeReplaceFactory, obj);
else
repl = _writeReplace.invoke(obj);
//Some class would return itself for wrapReplace, which
would cause infinite recursion
//In this case, we could write the object just like normal
cases
if (repl != obj) {
out.removeRef(obj);
out.writeObject(repl);
out.replaceRef(repl, obj);
return;
}
}
} catch (RuntimeException e) {
throw e;
} catch (Exception e) {
// log.log(Level.FINE, e.toString(), e);
throw new RuntimeException(e);
}
int ref = out.writeObjectBegin(cl.getName());
if (ref < -1) {
writeObject10(obj, out);
} else {
if (ref == -1) {
writeDefinition20(out);
out.writeObjectBegin(cl.getName());
}
writeInstance(obj, out);
}
}
```
因为_writeReplace不为null，就执行writeReplace方法了
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
