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CloneMethodMustImplementCloneable


CloneMethodMustImplementCloneable
The method clone() should only be implemented if the class implements the Cloneable interface with the exception of a final method that only throws CloneNotSupportedException.
        
		
		
		    
    			This rule is defined by the following XPath expression:
    			
    			
                        
//ClassOrInterfaceDeclaration
[not(./ImplementsList/ClassOrInterfaceType
[@Image='Cloneable'])]
/ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration
[MethodDeclaration
[MethodDeclarator[@Image
= 'clone' and count(FormalParameters/*) = 0]]
[not((../MethodDeclaration[@Final = 'true'] or ancestor::ClassOrInterfaceDeclaration[1][@Final = 'true'])
and Block[count(BlockStatement)=1]
/BlockStatement/Statement/ThrowStatement/Expression
/PrimaryExpression/PrimaryPrefix/AllocationExpression
/ClassOrInterfaceType[@Image = 'CloneNotSupportedException'])]]

                    
                
  
		    
		    
	    
	    
        
        
        Example:
            
                    
            
public class MyClass {
 public Object clone() throws CloneNotSupportedException {
  return foo;
 }
}