GracieleRodrigues-dev opened a new pull request, #1319:
URL: https://github.com/apache/commons-lang/pull/1319
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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