Affects PMD Version:7.0.0-rc1
Rule: UnnecessaryConstructor
Please provide the rule name and a link to the rule documentation:
https://docs.pmd-code.org/latest/pmd_rules_java_codestyle.html#unnecessaryconstructor
Description:
The first code sample uses the annotation com.google.inject.Inject, and the second one uses javax.inject.Inject. The analysis results of the two cases should be equivalent because these two annotations are equivalent. However, PMD reports a warning in the first sample and no warnings in the second one. Actually, PMD should not report a warning in Case 1 like the Case 2 because it has a injection here.
The exact same issue applies to Spring's @Autowired.
Code Sample demonstrating the issue:
Case 1
import com.google.inject.Inject;
public class Foo {
private Foo() {}
}
public class Bar extends Foo {
@Inject
public Bar() {} // report a warnning
}
Case 2
import javax.inject.Inject;
public class Foo {
private Foo() {}
}
public class Bar extends Foo {
@Inject
public Bar() {} // report no warnning
}
Expected outcome: PMD reports a violation at line 8 in the first sample, but that's wrong. That's a false positive. PMD should report no violation if PMD sees com.google.inject.Inject.
Running PMD through: CLI
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