Pre-packaged Query

Query name="Semmle/StyleChecks/J2EE/Message-Bean/A message-bean class must define a public constructor that takes no arguments"

Reports all Message-Bean types that do not contain a public constructor that takes no arguments.

from MessageBean mbean
where not exists(Constructor c | c.getDeclaringType() = mbean and
                                 c.hasModifier("public") and 
                                 c.hasNoParams())
select mbean, mbean.toString() + " message-bean class must define"
              + " a public constructor that takes no arguments"

References

Enterprise JavaBeans 2.1 - Specification, section 15.7.2