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resources.report.rules.pmd.ClassWithOnlyPrivateConstructorsShouldBeFinal.html Maven / Gradle / Ivy

ClassWithOnlyPrivateConstructorsShouldBeFinal

A class with only private constructors should be final, unless the private constructor is invoked by a inner class.


TypeDeclaration[count(../TypeDeclaration) = 1]/ClassOrInterfaceDeclaration
[@Final = 'false']
[count(./ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration/ConstructorDeclaration[@Private = 'true']) >= 1 ]
[count(./ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration/ConstructorDeclaration[(@Public = 'true') or (@Protected = 'true') or (@PackagePrivate = 'true')]) = 0 ]
[not(.//ClassOrInterfaceDeclaration)]

Example(s):


public class Foo {  //Should be final
    private Foo() { }
}