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

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StaticEJBFieldShouldBeFinal


StaticEJBFieldShouldBeFinal
According to the J2EE specification (p.494), an EJB should not have any static fields
with write access. However, static read only fields are allowed. This ensures proper
behavior especially when instances are distributed by the container on several JREs.
    	
		
		
		    
    			This rule is defined by the following XPath expression:
    			
    			
    //ClassOrInterfaceDeclaration[
    (
    (./ImplementsList/ClassOrInterfaceType[ends-with(@Image,'SessionBean')])
    or
    (./ImplementsList/ClassOrInterfaceType[ends-with(@Image,'EJBHome')])
    or
    (./ImplementsList/ClassOrInterfaceType[ends-with(@Image,'EJBLocalObject')])
    or
    (./ImplementsList/ClassOrInterfaceType[ends-with(@Image,'EJBLocalHome')])
    or
    (./ExtendsList/ClassOrInterfaceType[ends-with(@Image,'EJBObject')])
    )
    and
    (./ClassOrInterfaceBody/ClassOrInterfaceBodyDeclaration[
         (./FieldDeclaration[@Static = 'true'])
         and
         (./FieldDeclaration[@Final = 'false'])
    ])
]
    		 
  
		    
		    
	    
	    
        
        
        Example:
            
                    
public class SomeEJB extends EJBObject implements EJBLocalHome {
	private static int BAD_STATIC_FIELD;

	private static final int GOOD_STATIC_FIELD;
}