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reveng.xml - how to change set to lazy="false"

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klogger

Post subject: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 9:18 am

Beginner

Joined: Thu Mar 27, 2008 8:49 am
Posts: 27

I am really struggling with reveng.xml now that the documentation seems to have vanished. I did have this page bookmarked which I found quite useful but now it is a 404.

My problem is that I am using auto-generation of both source and hbm.xml files and one of my hbm.xml files has the following:

Code:

<set name="HTActivities" inverse="false" lazy="true" table="htDayEntryToActivity" fetch="select">
    <key>
        <column name="day_entry_id" not-null="true" />
    </key>
    <many-to-many entity-name="uk.co.prodia.prosoc.domainmodel.HTActivity">
        <column name="activity_id" not-null="true" />
    </many-to-many>
</set>

I would like to change that using the reveng.xml file so that it has:

Code:

lazy="false"

The table htDayEntryToActivity is a simple join table that holds the two primary keys between htDayEntry and htActivity. I assume I need something like:

Code:

<table name="htDayEntryToActivity" catalog="habittracker">
    <foreign-key constraint-name="fk_htDayEntryToActivity_activity_id">
        <set lazy="false"/>
    </foreign-key>
</table>

but that does not work as it throws a parse error:

Quote:

Attribute "lazy" must be declared for element type "set".

Can anyone provide a sample code snippet that would do that? If anyone has a link to the documentation that would also be very handy!

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aukemid

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 9:28 am

Regular

Joined: Wed Mar 10, 2010 4:48 am
Posts: 106

use lazy="no-proxy"

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klogger

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 10:09 am

Beginner

Joined: Thu Mar 27, 2008 8:49 am
Posts: 27

Thanks for the reply but it didn't work as I am encountering the error before it get to read that attribute. I am using:

Code:

<table name="htDayEntryToActivity" catalog="habittracker">
    <foreign-key constraint-name="fk_htDayEntryToActivity_activity_id">
        <set lazy="no-proxy"/>
    </foreign-key>
</table>

and it is complaining about:

Quote:

org.hibernate.MappingException: invalid override definition
org.xml.sax.SAXParseException: Attribute "lazy" must be declared for element type "set".
org.hibernate.MappingException: Could not configure overrides from file: /storage/gavin/work/mercurial/habittracker/prosoc/database/hibernate.reveng.prosoc.xml
at org.hibernate.cfg.reveng.OverrideRepository.addFile(OverrideRepository.java:119)
at org.hibernate.tool.ant.JDBCConfigurationTask.doConfiguration(JDBCConfigurationTask.java:63)
at org.hibernate.tool.ant.ConfigurationTask.getConfiguration(ConfigurationTask.java:55)
at org.hibernate.tool.ant.HibernateToolTask.getConfiguration(HibernateToolTask.java:302)
at org.hibernate.tool.ant.HibernateToolTask.getProperties(HibernateToolTask.java:318)
at org.hibernate.tool.ant.ExporterTask.configureExporter(ExporterTask.java:94)
at org.hibernate.tool.ant.ExporterTask.execute(ExporterTask.java:39)
at org.hibernate.tool.ant.HibernateToolTask.execute(HibernateToolTask.java:186)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:288)
at sun.reflect.GeneratedMethodAccessor52.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:357)
at org.apache.tools.ant.Target.performTasks(Target.java:385)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1337)
at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1189)
at org.apache.tools.ant.module.bridge.impl.BridgeImpl.run(BridgeImpl.java:278)
at org.apache.tools.ant.module.run.TargetExecutor.run(TargetExecutor.java:498)
at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:151)
Caused by: org.hibernate.MappingException: invalid override definition

I assume it means that the attribute lazy is not a part of the hibernate-reverse-engineering-3.0.dtd DTD for the element set.

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aukemid

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 10:20 am

Regular

Joined: Wed Mar 10, 2010 4:48 am
Posts: 106

Try this:

Code:

<class name="A">
   <set name="setNameA" table="name_of_the_join-table">
      <key column="FK_to_A" />
      <many-to-many class="class_B" column="FK_to_B" />
   </set>
</class>

<class name="B">
   <set name="setNameB" table="name_of_the_join-table" inverse="true">// note the inverse, one of the two needs this
      <key column="FK_to_B" />
      <many-to-many class="class_A" column="FK_to_A" />
   </set>
</class>

This will create a join-table between A and B, which will have a foreign key to A and a foreign key to B.
And you should be able to add lazy="false" to this sets.

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klogger

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 10:39 am

Beginner

Joined: Thu Mar 27, 2008 8:49 am
Posts: 27

That looks like an excellent reply but I think I may have something else wrong. I am getting the error:

Quote:

org.xml.sax.SAXParseException: Element type "class" must be declared.

This happens a lot but I have successfully used:

Code:

<foreign-key constraint-name="fk_htUserTrackerDataMapper_tracker_id">
    <set cascade="persist,merge,save-update" />
</foreign-key>

in several places in the reveng.xml file so I know that it is essentially set up correctly. For some reason it doesn't notice many of the elements I have tried such as <class /> , <many-to-many /> etc. I had just assumed that they were not part of the DTD.

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aukemid

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 10:50 am

Regular

Joined: Wed Mar 10, 2010 4:48 am
Posts: 106

Here's a template:

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>
   <class name="class" table="table_name">
      // add the id, properties and sets here
   </class>
</hibernate-mapping>

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klogger

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 10:59 am

Beginner

Joined: Thu Mar 27, 2008 8:49 am
Posts: 27

I am afraid the code you are providing is for the hbm.xml files which I am auto-generating. In order to control the auto-generated hbm.xml files then a reveng.xml file is used. It is the syntax over that file that I am having trouble with. For some reason it is significantly different to a standard hbm.xml file and since the documentation is no longer available it is making things extremely difficult.

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aukemid

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 11:14 am

Regular

Joined: Wed Mar 10, 2010 4:48 am
Posts: 106

klogger wrote:

In order to control the auto-generated hbm.xml files then a reveng.xml file is used.

I don't really understand you, but if auto-generating doesn't work you could try it manually.

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klogger

Post subject: Re: reveng.xml - how to change set to lazy="false"

Posted: Thu Apr 01, 2010 11:21 am

Beginner

Joined: Thu Mar 27, 2008 8:49 am
Posts: 27

I am too far into the project to unwind and rebuild but thanks for your help. Next time I think I will not use Hibernate Tools as they are causing far more trouble than they are worth.

If anyone else has any ideas then they would be most welcome as I am probably going to need to manually retrieve the objects I need and add then to the hibernate result. I was using Hibernate in the first place to avoid all of that!

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