Nullabilitypublic final class Nullability extends Object | Implements the algorithm for validating property values
for illegal null values |
| Fields Summary |
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| private final SessionImplementor | session |
| Constructors Summary |
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public Nullability(SessionImplementor session)
this.session = session;
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| Methods Summary |
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| private static java.lang.String | buildPropertyPath(java.lang.String parent, java.lang.String child)Return a well formed property path.
Basicaly, it will return parent.child
return new StringBuffer( parent.length() + child.length() + 1 )
.append(parent).append('.").append(child).toString();
| | private java.lang.String | checkComponentNullability(java.lang.Object value, org.hibernate.type.AbstractComponentType compType)check component nullability. Returns property path that break
nullability or null if none
/* will check current level if some of them are not null
* or sublevels if they exist
*/
boolean[] nullability = compType.getPropertyNullability();
if ( nullability!=null ) {
//do the test
final Object[] values = compType.getPropertyValues( value, session.getEntityMode() );
final Type[] propertyTypes = compType.getSubtypes();
for ( int i=0; i<values.length; i++ ) {
final Object subvalue = values[i];
if ( !nullability[i] && subvalue==null ) {
return compType.getPropertyNames()[i];
}
else if ( subvalue != null ) {
String breakProperties = checkSubElementsNullability( propertyTypes[i], subvalue );
if ( breakProperties != null ) {
return buildPropertyPath( compType.getPropertyNames()[i], breakProperties );
}
}
}
}
return null;
| | public void | checkNullability(java.lang.Object[] values, org.hibernate.persister.entity.EntityPersister persister, boolean isUpdate)Check nullability of the class persister properties
/*
* Algorithm
* Check for any level one nullability breaks
* Look at non null components to
* recursively check next level of nullability breaks
* Look at Collections contraining component to
* recursively check next level of nullability breaks
*
*
* In the previous implementation, not-null stuffs where checked
* filtering by level one only updateable
* or insertable columns. So setting a sub component as update="false"
* has no effect on not-null check if the main component had good checkeability
* In this implementation, we keep this feature.
* However, I never see any documentation mentioning that, but it's for
* sure a limitation.
*/
final boolean[] nullability = persister.getPropertyNullability();
final boolean[] checkability = isUpdate ?
persister.getPropertyUpdateability() :
persister.getPropertyInsertability();
final Type[] propertyTypes = persister.getPropertyTypes();
for ( int i = 0; i < values.length; i++ ) {
if ( checkability[i] && values[i]!=LazyPropertyInitializer.UNFETCHED_PROPERTY ) {
final Object value = values[i];
if ( !nullability[i] && value == null ) {
//check basic level one nullablilty
throw new PropertyValueException(
"not-null property references a null or transient value",
persister.getEntityName(),
persister.getPropertyNames()[i]
);
}
else if ( value != null ) {
//values is not null and is checkable, we'll look deeper
String breakProperties = checkSubElementsNullability( propertyTypes[i], value );
if ( breakProperties != null ) {
throw new PropertyValueException(
"not-null property references a null or transient value",
persister.getEntityName(),
buildPropertyPath( persister.getPropertyNames()[i], breakProperties )
);
}
}
}
}
| | private java.lang.String | checkSubElementsNullability(org.hibernate.type.Type propertyType, java.lang.Object value)check sub elements-nullability. Returns property path that break
nullability or null if none
//for non null args, check for components and elements containing components
if ( propertyType.isComponentType() ) {
return checkComponentNullability( value, (AbstractComponentType) propertyType );
}
else if ( propertyType.isCollectionType() ) {
//persistent collections may have components
CollectionType collectionType = (CollectionType) propertyType;
Type collectionElementType = collectionType.getElementType( session.getFactory() );
if ( collectionElementType.isComponentType() ) {
//check for all components values in the collection
AbstractComponentType componentType = (AbstractComponentType) collectionElementType;
Iterator iter = CascadingAction.getLoadedElementsIterator(session, collectionType, value);
while ( iter.hasNext() ) {
Object compValue = iter.next();
if (compValue != null) {
return checkComponentNullability(compValue, componentType);
}
}
}
}
return null;
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