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Why you should care

[/vc_column_text][vc_column_text]Correctly updating a static field from a non-static method is tricky to get right and could easily lead to bugs if there are multiple class instances and/or multiple threads in play. Ideally, static fields are only updated from synchronized static methods.[/vc_column_text][vc_empty_space][/vc_column_inner][/vc_row_inner][vc_empty_space height=”12px”][vc_empty_space][vc_separator][vc_column_text]

How we detect

[/vc_column_text][vc_column_text]CAST Highlight counts one occurrence each time a static field is directly updated from a non-static method with one of the following operators : =, +=, -=, *=, /=, %=, ++, – –

class toto {
static def i = 0
def void meth1(int v) {
i = v // +1 VIOLATION
}

def void meth2(int v) {
int i
i = v // OK (i is the local variable)
}
def void meth3(int v) {
int i
this.i = v // +1 VIOLATION
}
def void meth4(int i, int v) {
i = v // OK (i is the parameter)
}
}

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References

[/vc_column_text][vc_column_text]https://codenarc.org/codenarc-rules-design.html#assignmenttostaticfieldfrominstancemethod-rule[/vc_column_text][vc_empty_space][vc_row_inner][vc_column_inner][vc_single_image image=”5362″ img_size=”full”][vc_column_text]

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