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Posted to user@hivemind.apache.org by German de la Cruz <gd...@afip.gov.ar> on 2005/07/04 16:12:33 UTC

putting a default value to a read-attribute rule in a configuration-point

Hi, folks!

Apologies if this has been asked and answered before, but I can't find an
answer to this problem.

Is there a way to put a default value to a read-attribute rule of a
configuration-point? I mean, something like skip-if-null, but where there is
a null, it put a defined default value. Something like

<read-attribute property="attribute1" attribute="attribute1"
value-if-null="${some.default.value}"/>

Well, I hope this is clear enough. Thanks in advance

German.-



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RE: putting a default value to a read-attribute rule in a configuration-point

Posted by German de la Cruz <gd...@afip.gov.ar>.
Ok, this is the solution I found. I put a default value in FactoryDefaults
and then I write an attribute in the service that is contributed with my
contribution.

The problem is want to put the default value in the contribution itself in a
way to avoid putting this attribute in the service because I think it's not
a responsibility of the service but the contribution.

This is the solution I implement....

<service-point id="OperationService" interface="OperationService">
	<invoke-factory service-id="hivemind.BuilderFactory">
	  <construct class="OperationServiceDefault">
		<set-configuration configuration-id="Operations" property="operations"/>
		<set property="defaultLanguage" value="${defaults.default-el}"/>
	  </construct>
	</invoke-factory>
</service-point>

<configuration-point id="Operations">
	<schema>
	  <element name="operation">
		<attribute name="target" required="true"/>
		<attribute name="operation" required="true"/>
		<attribute name="language" required="false"/>
		<attribute name="message-key"/>
		<rules>
			<create-object class="OperationImpl"/>
			<read-attribute property="target" attribute="target" translator="class"/>
			<read-attribute property="operation" attribute="operation"/>
			<read-attribute property="messageKey" attribute="message-key"/>
			<read-attribute property="language" attribute="language"
skip-if-null="true"/>
			<read-content property="content"/>
			<invoke-parent method="addElement"/>
		</rules>
	  </element>
	</schema>
</configuration-point>

<contribution configuration-id="hivemind.FactoryDefaults">
<default symbol="defaults.default-el" value="groovy"/>
</contribution>
.



And this is an approach that I want to....

<service-point id="OperationService" interface="OperationService">
	<invoke-factory service-id="hivemind.BuilderFactory">
	  <construct class="OperationServiceDefault">
		<set-configuration configuration-id="Operations" property="operations"/>
	  </construct>
	</invoke-factory>
</service-point>

<configuration-point id="Operations">
	<schema>
	  <element name="operation">
		<attribute name="target" required="true"/>
		<attribute name="operation" required="true"/>
		<attribute name="language" required="false"/>
		<attribute name="message-key"/>
		<rules>
			<create-object class="OperationImpl"/>
			<read-attribute property="target" attribute="target" translator="class"/>
			<read-attribute property="operation" attribute="operation"/>
			<read-attribute property="messageKey" attribute="message-key"/>
			<read-attribute property="language" attribute="language"
value-if-null="${defaults.default-el}"/>
			<read-content property="content"/>
			<invoke-parent method="addElement"/>
		</rules>
	  </element>
	</schema>
</configuration-point>

<contribution configuration-id="hivemind.FactoryDefaults">
<default symbol="defaults.default-el" value="groovy"/>
</contribution>


Thanks!

-----Mensaje original-----
De: Johan Lindquist [mailto:johan@kawoo.co.uk]
Enviado el: Lunes, 04 de Julio de 2005 11:30 a.m.
Para: hivemind-user@jakarta.apache.org
Asunto: Re: putting a default value to a read-attribute rule in a
configuration-point

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Hash: SHA1

Hi German,

You can put the default value into the hivemind.FactoryDefaults
configuration point and HiveMind will use that if no other values are found.

<contribution configuration-id="hivemind.FactoryDefaults">
        <default symbol="some.default.value" value="the-default-value"/>
</contribution>

Hope that helps,

Johan

German de la Cruz wrote:
> Hi, folks!
>
> Apologies if this has been asked and answered before, but I can't find an
> answer to this problem.
>
> Is there a way to put a default value to a read-attribute rule of a
> configuration-point? I mean, something like skip-if-null, but where there
is
> a null, it put a defined default value. Something like
>
> <read-attribute property="attribute1" attribute="attribute1"
> value-if-null="${some.default.value}"/>
>
> Well, I hope this is clear enough. Thanks in advance
>
> German.-
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
>
>

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Re: putting a default value to a read-attribute rule in a configuration-point

Posted by Johan Lindquist <jo...@kawoo.co.uk>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi German,

You can put the default value into the hivemind.FactoryDefaults
configuration point and HiveMind will use that if no other values are found.

<contribution configuration-id="hivemind.FactoryDefaults">
        <default symbol="some.default.value" value="the-default-value"/>
</contribution>

Hope that helps,

Johan

German de la Cruz wrote:
> Hi, folks!
> 
> Apologies if this has been asked and answered before, but I can't find an
> answer to this problem.
> 
> Is there a way to put a default value to a read-attribute rule of a
> configuration-point? I mean, something like skip-if-null, but where there is
> a null, it put a defined default value. Something like
> 
> <read-attribute property="attribute1" attribute="attribute1"
> value-if-null="${some.default.value}"/>
> 
> Well, I hope this is clear enough. Thanks in advance
> 
> German.-
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: hivemind-user-unsubscribe@jakarta.apache.org
> For additional commands, e-mail: hivemind-user-help@jakarta.apache.org
> 
> 

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