Beginner spring property question

[Mark Reyes]

Hi All,

After reading some basics about Bean creation and dependency injection in spring, I just straight into Spring Web MVC since I think I can learn best
with this tactic...

But I am currently confuse on one item.

Its about this code:

  <beans>
    <bean id="handlerMapping"
          class="org.springframework.web.servlet.handler.SimpleUrlHandlerMapping">
        <property name="interceptors">
            <list>
                <ref bean="officeHoursInterceptor"/>
            </list>
        </property>
        <property name="mappings">
            <value>
                /*.form=editAccountFormController
                /*.view=editAccountFormController
            </value>
        </property>
    </bean>

    <bean id="officeHoursInterceptor"
          class="samples.TimeBasedAccessInterceptor">
        <property name="openingTime" value="9"/>
        <property name="closingTime" value="18"/>
    </bean>
<beans>  

I am not sure where the property name "interceptor" that accepts a list is found in the class SimpleUrlHandlerMapping.

I thought of beans as having some property where we can inject this value, but as I have check the SimpleUrlHandlerMapping class javadoc,I cant seem
to find any property about this?
How is it possible for spring to know that setting the property interceptors would act as handlerinterceptors..

I know I am missing something basic but can you point me out into some resource? Thanks

[Hong Anderson]

It extends AbstractHandlerMapping.
http://static.springsource.org/spring/docs/2.5.x/api/org/springframework/web/servlet/handler/AbstractHandlerMapping.html#setInterceptors%28java.lang.Object[]%29

This is an arguably weak point of OO languages, you need to know everything in the hierarchy.

[Mark Reyes]

Hi Kenkaj,

Thanks for pointing this out...

You dont just only reply to our question but still adds personal insight also which I find very informative in all your post...

[Hong Anderson]

Hi mark,
Thanks for the update.

I'm glad to know that my answer is helpful .