How can I get constraints working in grails if I'm using JPA annotated classes from a jar file?

Bottomline, I'm using Grails 1.3.7 and using JPA annotated classes from a JAR file, But the constraints are not working, meaning they are ignored even if I explicitly code them, like usual in the domain classes,

Is there a way I can get the constrain开发者_如何学Cts working?

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@Don

1.- JPA classes are .java inside a jar file, I've created Grails Domain classes using this .java classes by just using the grails create-domain-class and using the corresponding package to the .java, so the outcome result in the grail project is

Domain \ com.myapp.Clazz.groovy \

package com.myapp.Clazz class Clazz {

}

Later, I tried to add a Constraint.groovy file to the src/java folder with my constraints, as specified in the following article: Reuse your hibernate/jpa

But when I tried to run the app the compiler gets into an infinte cycle and never finish to compile the project..

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Grails documentation here says, that if you annotate your class with @Validateable and provide a static constraints block inside class and register its package in Config.groovy, you will be able to validate this class as usual.