JAVA.TYPE.MPSFA : Mutable Public Static Final Array (Java)

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CodeSonar^® 9.2p0

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Java

JAVA.TYPE.MPSFA : Mutable Public Static Final Array (Java)

Summary

An array is declared as public final static, but its contents can be modified.

The final constraint requires that the array object itself be assigned only once, but makes no guarantees about the values of the array elements.
The public modifier exposes the array outside the class: a malicious program can change the values stored in the array.

Use annotation @Immutable to identify classes that should be ignored by this check because they only undergo mutations that do not change observable behavior.

Properties

Class Name

Mutable Public Static Final Array (Java)

Significance

reliability

Mnemonic

JAVA.TYPE.MPSFA

Example

// MyClass.java
public class MyClass {
    public final static int[] SMALL_PRIMES = new int[] { 2, 3, 5, 7, 11, 13, 17 };
    // 'Mutable Public Static Final Array (Java)' warning issued on previous line:
    // - array is final but its elements are not 
}

Resolution

Hide the field, for example by reducing its visibility to protected.

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

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