Re: [Springframework-developer] Bean factory getting access to its bean id

[Cameron B. <ca...@da...>]

I just wanted to add that I for the second part of my question 
(obtaining the bean ID for the current bean) I would implement 
BeanFactoryAware and iterate through all of the bean names, calling 
getBean(name) and checking for object identity.

Does it make sense to add the ID and aliases into the 
AbstractBeanDefinition and then to create a BeanDefinitionAware 
interface that allows the bean to become aware ?

Thanks again,

Cameron

Cameron Braid wrote:

> Is there any way that I can allow a bean factory to find out its id 
> attribute from the applicationContext.xml
>
> i.e. I am trying to get a grip on how spring works, and therefore I am 
> trying to write a little integration layer to make spring an action 
> factory for xwork, to allow me to use spring components and 
> interceptors.  I want to try and avoid repetition of configuration 
> wherever possible.
>
> I have it at the stage where I have a bean declaration like this :
>
>    <bean id="defaultActionTransactionAttributes" 
> class="com.datacodex.spring.beans.PropertiesFactoryBean">
>        <property name="properties">
>            <props>
>                <prop key="execute">PROPAGATION_REQUIRED</prop>
>            </props>
>        </property>
>    </bean>
>
>    <bean id="admin.SpringAdminAction" class="WebworkActionFactoryBean">
>        <property 
> name="action"><value>/admin/SpringAdminAction</value></property>
>        <property name="transactionManager"><ref 
> local="transactionManager"/></property>
>        <property name="transactionAttributes"><ref 
> local="defaultActionTransactionAttributes"/></property>
>    </bean>
>
> I would like to be able to access the id="admin.SpringAdminAction" 
> value (or the bean name attribute) from within the 
> WebworkActionFactoryBean therefore removing the need to have the extra 
> 'action' property <property 
> name="action"><value>/admin/SpringAdminAction</value></property>.
>
> Idealy I would like to use the /admin/SpringAdminAction as the bean id 
> to make mapping from WebWork seamless, and without needing the 
> conversion to '.' style.
> Therefore - is there any way that the bean id can be changed to allow 
> any valid xml string ?  Currently I am receiving an exception, from 
> the xml validator.  Can the id atttribuet be changed to be a
>
> [22:12:29]INFO [XmlBeanFactory] Loading XmlBeanFactory from 
> InputStream [[ReadStream com.caucho.vfs.FileReadStream@190a0d6]]
> [22:12:29]ERROR[ContextLoader] Failed to initialize beans in 
> application context: Line 44 in XML document is invalid; nested 
> exception is:
>    org.xml.sax.SAXParseException: Attribute value 
> "/admin/SpringAdminAction" of type ID must be a name.
> org.xml.sax.SAXParseException: Attribute value 
> "/admin/SpringAdminAction" of type ID must be a name.
>    at org.apache.xerces.parsers.DOMParser.parse(Unknown Source)
>    at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source)
>    at javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:76)
>
> The dtd states that it myst be a valid XML ID, and to use the optional 
> name attribute if you want an illegal name.  Though this will require 
> two identifyers for the bean, which I think is pointless.  Does the ID 
> have to be mandatory.  Can't a validation be implemented in java to 
> check that atleast the name or the id is supplied ?  Then the same for 
> the <!ATTLIST ref local IDREF #IMPLIED>  this could be a CDATA with 
> java based validation.
>
> Cheers,
>
> Cameron
>


-- 
Any damn fool can write code that a computer can understand...
The trick is to write code that humans can understand.
[Martin Fowler http://www.martinfowler.com/distributedComputing/refactoring.pdf]