This is probably going to be frowned upon by purists, but until there is a way to configure hibernate to ensure @Embedded fields are non-null, I've written an AspectJ to populate the value if null.
This isn't fully tested, and definitely not tested against Collections of embedded objects, so buyer-beware.
{code}
public aspect NonNullEmbedded {
// define a pointcut for any getter method of a field with @Embedded of type Validity with any name in com.ia.domain package
pointcut embeddedGetter() : get( @javax.persistence.Embedded * com.company.model..* );
/**
* Advice to run before any Embedded getter.
* Checks if the field is null. If it is, then it automatically instantiates the Embedded object.
*/
Object around() : embeddedGetter(){
Object value = proceed();
// check if null. If so, then instantiate the object and assign it to the model.
// Otherwise just return the value retrieved.
if( value == null ){
String fieldName = thisJoinPoint.getSignature().getName();
Object obj = thisJoinPoint.getThis();
// check to see if the obj has the field already defined or is null
try{
Field field = obj.getClass().getDeclaredField(fieldName);
Class clazz = field.getType();
value = clazz.newInstance();
field.setAccessible(true);
field.set(obj, value );
}
catch( NoSuchFieldException | IllegalAccessException | InstantiationException e){
e.printStackTrace();
}
}
return value;
}
}
{code}
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