public aspect BalanceChangeSecurityAspect {

   private SecurityManager securityManager;

   public void setSecurityManager(SecurityManager securityManager) {
      this.securityManager = securityManager;
   }

   private pointcut balanceChanged() : 
      set(int Account.balance);

   before() : balanceChanged() {
      this.securityManager.checkAuthorizedToModify();
   }
}

<bean id="securityAspect" 
   class="org.springframework.samples.aspectj.bank.BalanceChangeSecurityAspect" 
   factory-method="aspectOf"
>
   <property name="securityManager">
      <ref local="securityManager"/>
   </property>
</bean>