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Custom value and Builder
by El Acuariano
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Hi all, I have a use case that I think should be quite common: I have several category type properties in my domain classes that generally should be selected from a predefined set but some times it need a custom value that doesn't fit the predefined ones. Is there a nice/recommended way of doing this? For example, lets say I have a domain class Address with a property Country. Normally all available countries would be selectable. But to be safe, I want to give users the chance to insert one. So, in the Address edit page, the user selects "Other" in the selection box and a text field shows where he can insert the unlisted country.
> - I need to fill-in an incremental invoice number. It should be editable for > flexibility, but when creating a new invoice it should be initialized to the > current invoice number. How can I set the initial value for a new invoice? And Alejandro's answer was: There is a builder pattern implementation. But I just realize thatin Trails 1.2.x there is no way to contribute your builder (org.trails.builder.Builder) to the builder director. Take a look at it (org.trails.builder.BuilderDirector), if that is what you need I can quickly fix it to allow contributions to the map. I don't really understand how to use it. |
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Re: Custom value and Builder
by Alejandro Scandroli-2
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Hi
It's the GOF's Builder pattern http://en.wikipedia.org/wiki/Builder_pattern First you need to implement this interface: org.trails.builder.Builder It should as simple as: public class InvoiceBuilder implements Builder<Invoice> { public Invoice build() { Invoice invoice = new Invoice(); // modify your invoice here return invoice; } } Then (this is the part that's missing in Trails 1.2) add your builder to the BuilderDirector. builderDirector.add(org.trails.demo.Invoice.class, new InvoiceBuilder()); or something like this but using spring. Again, there is currently no way to contribute builders to the BuilderDirector's map, if you need it please rise a JIRA and I will take care of this during the weekend. Saludos. Alejandro. On Tue, Feb 3, 2009 at 1:22 AM, El Acuariano <acuariano@...> wrote: > Hi all, > I have a use case that I think should be quite common: I have several > category type properties in my domain classes that generally should be > selected from a predefined set but some times it need a custom value that > doesn't fit the predefined ones. Is there a nice/recommended way of doing > this? For example, lets say I have a domain class Address with a property > Country. Normally all available countries would be selectable. But to be > safe, I want to give users the chance to insert one. So, in the Address edit > page, the user selects "Other" in the selection box and a text field shows > where he can insert the unlisted country. > Some time back I asked the following question: >> - I need to fill-in an incremental invoice number. It should be editable >> for >> flexibility, but when creating a new invoice it should be initialized to >> the >> current invoice number. How can I set the initial value for a new invoice? > > > And Alejandro's answer was: > There is a builder pattern implementation. But I just realize that > in Trails 1.2.x there is no way to contribute your builder > (org.trails.builder.Builder) to the builder director. Take a look at > it (org.trails.builder.BuilderDirector), if that is what you need I > can quickly fix it to allow contributions to the map. > > I don't really understand how to use it. > --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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Re: Custom value and Builder
by El Acuariano
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Hi,
I've been noticed by Jira that this is already solved. I still don't understand how to add my builder to the director... Any help?
On Tue, Feb 3, 2009 at 9:27 PM, Alejandro Scandroli <ascandroli@...> wrote: Hi |
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Re: Custom value and Builder
by Alejandro Scandroli-2
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Hi Hernán
Check the checkin: http://fisheye.codehaus.org/changelog/trails?cs=1071 You will have to modify your applicationContext.xml and hivemodule.xml to reflect the changes: http://fisheye.codehaus.org/browse/trails/branches/trails-1.2.x/examples/recipe/src/main/resources/applicationContext.xml?r1=963&r2=1071 http://fisheye.codehaus.org/browse/trails/branches/trails-1.2.x/archetypes/trails-archetype/src/main/resources/archetype-resources/src/main/webapp/WEB-INF/hivemodule.xml?r1=963&r2=1071 Then contribute your builder in your applicationContext.xml <bean id="builderDirector" class="org.trails.builder.BuilderDirectorImpl"> <property name="builders"> <map> <entry> <key> <value>com.yourpackage.entities.Invoice/value> </key> <bean class="org.yourpackage.builders.InvoiceBuilder"/> </entry> </map> </property> </bean> Saludos. Alejandro. On Fri, Feb 13, 2009 at 2:06 AM, El Acuariano <acuariano@...> wrote: > Hi, > I've been noticed by Jira that this is already solved. I still don't > understand how to add my builder to the director... Any help? > > On Tue, Feb 3, 2009 at 9:27 PM, Alejandro Scandroli > <ascandroli@...> wrote: >> >> Hi >> >> It's the GOF's Builder pattern >> http://en.wikipedia.org/wiki/Builder_pattern >> First you need to implement this interface: org.trails.builder.Builder >> It should as simple as: >> >> public class InvoiceBuilder implements Builder<Invoice> >> { >> >> public Invoice build() >> { >> Invoice invoice = new Invoice(); >> // modify your invoice here >> return invoice; >> } >> } >> >> >> Then (this is the part that's missing in Trails 1.2) add your builder >> to the BuilderDirector. >> builderDirector.add(org.trails.demo.Invoice.class, new >> InvoiceBuilder()); or something like this but using spring. >> >> Again, there is currently no way to contribute builders to the >> BuilderDirector's map, if you need it please rise a JIRA and I will >> take care of this during the weekend. >> >> Saludos. >> Alejandro. >> >> On Tue, Feb 3, 2009 at 1:22 AM, El Acuariano <acuariano@...> wrote: >> > Hi all, >> > I have a use case that I think should be quite common: I have several >> > category type properties in my domain classes that generally should be >> > selected from a predefined set but some times it need a custom value >> > that >> > doesn't fit the predefined ones. Is there a nice/recommended way of >> > doing >> > this? For example, lets say I have a domain class Address with a >> > property >> > Country. Normally all available countries would be selectable. But to be >> > safe, I want to give users the chance to insert one. So, in the Address >> > edit >> > page, the user selects "Other" in the selection box and a text field >> > shows >> > where he can insert the unlisted country. >> > Some time back I asked the following question: >> >> - I need to fill-in an incremental invoice number. It should be >> >> editable >> >> for >> >> flexibility, but when creating a new invoice it should be initialized >> >> to >> >> the >> >> current invoice number. How can I set the initial value for a new >> >> invoice? >> > >> > >> > And Alejandro's answer was: >> > There is a builder pattern implementation. But I just realize that >> > in Trails 1.2.x there is no way to contribute your builder >> > (org.trails.builder.Builder) to the builder director. Take a look at >> > it (org.trails.builder.BuilderDirector), if that is what you need I >> > can quickly fix it to allow contributions to the map. >> > >> > I don't really understand how to use it. >> > >> >> --------------------------------------------------------------------- >> To unsubscribe from this list, please visit: >> >> http://xircles.codehaus.org/manage_email >> >> > > --------------------------------------------------------------------- To unsubscribe from this list, please visit: http://xircles.codehaus.org/manage_email |
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Re: Custom value and Builder
by El Acuariano
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Thanks! It works fine!
On Fri, Feb 13, 2009 at 9:59 AM, Alejandro Scandroli <ascandroli@...> wrote: Hi Hernán |
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