Affects PMD Version: 6.43.0
Rule: StringToString
Description:
When you have a method chain call and at the end the toString() call. And there is a local method with the same name as the method call, then this rule is confused. If the local method returns a String, then this rule is triggered.
The rule searches always for local method declarations, but that's wrong - at least for method chains.
Code Sample demonstrating the issue:
public class StringToString_FP {
private String s;
public void print(A a) {
this.s = a.getB().getC().toString(); // line 5 - false positive
this.s = String.valueOf(a.getB().getC()); // workaround
System.out.println(s);
}
public String getC() {
return "";
}
}
interface A {
B getB();
}
interface B {
Character getC();
}
B::getC returns a Character, StringToString_FP::getC returns a String.
At line 5, B::getC is called.
Expected outcome:
PMD reports a violation at line 5, but that's wrong. That's a false positive.
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