code: @Override
  	public void visitClassContext(ClassContext classContext) {
  		try {
  			javaClass = classContext.getJavaClass();
  			if (javaClass.getMajor() >= Const.MAJOR_1_5) {
  				javaClass.accept(this);
  			}
  		} finally {
  			javaClass = null;
  		}
  	}
docs: overrides the visitor to make sure that the class was compiled by java 1.5 or
  later.
  
  @param classContext the context object of the currently parsed class