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From Giacomo Pati <giac...@apache.org>
Subject Re: Hibernat2 block
Date Sat, 19 Apr 2003 20:42:23 GMT
On Sat, 19 Apr 2003, Christopher Oliver wrote:

> Why not use a flowscript to call Hibernate? Then you wouldn't need a
> special logicsheet. Jpath would be enough.

Siply because I don't want to use a flow script any times I'd like
to use Hibernate.

Giacomo

>
> Regards,
>
> Chris
>
> Giacomo Pati wrote:
>
> >Hi team
> >
> >We've recently started a project that uses the Hibernat2 package from
> >http://hibernate.sf.net as a object to relational mapping tool. We considered
> >other packages and end up with Hibernate2 because of:
> >
> >  - has good performance
> >  - has quite a good community
> >  - has many project using it (http://hibernate.bluemars.net/27.html)
> >  - has XDoclet support
> >    (http://xdoclet.sourceforge.net/tags/hibernate-tags.html)
> >
> >and some other aspects.
> >
> >We have developped a logicsheet that is a mixture out of the esql and jpath
> >logicsheets that let you develop easily XSP pages with hibernated content.
> >
> >Consider the following object model:
> >
> >  Project
> >   !
> >   +--<>* Task                Staff
> >           !                   !
> >           +--<>* Mandate *<>--+
> >                   !
> >                   +--<>* Expenditure <!--+
> >                                          !
> >                                +---------+---------+
> >                                !                   !
> >                              Activity            Expense
> >
> >Where
> >  - Project     : Defines a project
> >  - Task        : Defines a task of a project
> >  - Mandate     : Defines a task worked on by a staff
> >  - Expendituere: Defines work activities as either
> >    - Activity  : Duration activity worked on a mandate
> >    - Expense   : Costs raised for a mandate
> >
> >Now using the logicsheet one can build a XSP page like:
> >
> >  <xsp:page language="java"
> >            xmlns:xsp="http://apache.org/xsp"
> >            xmlns:hbn="http://otego.com/xsp/hibernate/2.0" >
> >   <document>
> >    <hbn:execute-query>
> >    <hbn:query>from project in class Project</hbn:query>
> >     <hbn:results>
> >      <project>
> >       <name><hbn:value-of select="result/name"/></name>
> >       <hbn:for-each select="result/tasks">
> >        <task>
> >         <name><hbn:value-of select="name"/></name>
> >          <hbn:for-each select="mandates">
> >           <mandate>
> >            <staff>
> >             <name><hbn:value-of select="staff/name"/></name>
> >            </staff>
> >            <hbn:for-each select="expenditures">
> >             <expenditure>
> >              <date><hbn:value-of select="date"/></date>
> >              <description><hbn:value-of select="description"/></description>
> >              <hbn:choose>
> >               <hbn:when test="type='Activity'">
> >                <activity>
> >                 <duration><hbn:value-of select="duration"/></duration>
> >                </activity>
> >               </hbn:when>
> >               <hbn:when test="type='Expense'">
> >                <expense>
> >                 <amount><hbn:value-of select="amount"/></amount>
> >                </expense>
> >               </hbn:when>
> >              </hbn:choose>
> >             </expenditure>
> >            </hbn:for-each>
> >           <sum><hbn:value-of select="sumAmountOfAllExpenditure"/></sum>
> >           </mandate>
> >          </hbn:for-each>
> >          <sum><hbn:value-of select="sumAmountOfAllExpenditure"/></sum>
> >         </task>
> >        </hbn:for-each>
> >       <sum><hbn:value-of select="sumAmountOfAllExpenditure"/></sum>
> >      </project>
> >     </hbn:results>
> >     <hbn:no-results>
> >      <project/>
> >     </hbn:no-results>
> >     <hbn:error-results>
> >      <trace>
> >       <hbn:get-stacktrace/>
> >      </trace>
> >     </hbn:error-results>
> >    </hbn:execute-query>
> >   </document>
> >  </xsp:page>
> >
> >Anybody intressted in this? Can I donnate and add a block for it?
> >
> >Giacomo
> >
> >
> >
>
>
>
>
>

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