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codeql/java/ql/src/Advisory/Java Objects/AvoidCloneOverride.ql

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/**
* @name Overriding definition of clone()
* @description Overriding 'Object.clone' is bad practice. Copying an object using the 'Cloneable
* interface' and 'Object.clone' is error-prone.
* @kind problem
* @problem.severity recommendation
* @precision medium
* @id java/override-of-clone-method
* @tags quality
* reliability
* correctness
*/
import java
class ObjectCloneMethod extends CloneMethod {
ObjectCloneMethod() { this.getDeclaringType() instanceof TypeObject }
}
from Method m, ObjectCloneMethod clone
where
m.fromSource() and
// Only consider direct overrides of Object.clone
m.overrides(clone)
select m, "Overriding the Object.clone() method should be avoided."