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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 called by a inner class.
        

		
		
		    
    			
This rule is defined by the following XPath expression:
    			
    			
    
TypeDeclaration[count(../TypeDeclaration) = 1]/ClassOrInterfaceDeclaration
[@Final = 'false']
[count(./ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration/ConstructorDeclaration[@Private = 'true']) >= 1 ]
[count(./ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration/ConstructorDeclaration[@Public = 'true'])  = 0 ]
[not(.//ClassOrInterfaceDeclaration)]
             
  
		    
		    
	    
	    
        
        
        
Example:
            
    
                
public class Foo {  //Should be final
    private Foo() { }
}