GracieleRodrigues-dev opened a new pull request, #1320:
URL: https://github.com/apache/commons-lang/pull/1320
This pull request addresses the issue identified by SpotBugs:
*MC_OVERRIDABLE_METHOD_CALL_IN_READ_OBJECT* in the readObject method of the
EventListenerSupport class. The bug relates to the use of the potentially
overridable method Thread.currentThread().getContextClassLoader() during
deserialization, which could lead to unexpected behavior or security risks in
certain contexts.
#### *Changes Made*
1. *Introduced a static constant DEFAULT_CLASS_LOADER:*
- The ClassLoader is captured at class initialization and stored in a
static constant.
- This ensures a consistent and safe ClassLoader is used throughout the
deserialization process.
2. *Replaced the call to Thread.currentThread().getContextClassLoader:*
- The call inside the readObject method was replaced with the
DEFAULT_CLASS_LOADER constant.
- This eliminates the risk of calling a potentially overridden method
during deserialization.
3. *Added explanatory comments:*
- Detailed comments were added to clarify the purpose of the changes and
the reasoning behind the new approach.
#### *Advantages*
- *Improved Safety:* The readObject method no longer relies on a method that
could be overridden, reducing the likelihood of unexpected behavior during
deserialization.
- *Consistency:* By capturing the ClassLoader at initialization, the
deserialization process becomes more predictable and less dependent on runtime
thread states.
- *Compliance with Best Practices:* The changes align the code with best
practices for deserialization, particularly avoiding non-final or overridable
methods during critical operations.
#### *Conclusion*
This fix ensures the EventListenerSupport class is more robust, secure, and
reliable during deserialization while maintaining its original functionality.
These changes also resolve the SpotBugs warning without introducing breaking
changes to the codebase.
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