/**
* Walk the association tree for an entity, adding associations which should be join fetched to
* the {@link #associations} inst var. This form is the entry point into the walking for a given
* entity, starting the recursive calls into {@link
* #walkEntityTree(org.hibernate.persister.entity.OuterJoinLoadable, String, PropertyPath ,int)}.
*
* @param persister The persister representing the entity to be walked.
* @param alias The (root) alias to use for this entity/persister.
* @param path The property path to the entity being walked
* @param currentDepth The current join depth
* @throws org.hibernate.MappingException ???
*/
private void walkEntityTree(
final OuterJoinLoadable persister,
final String alias,
final PropertyPath path,
final int currentDepth)
throws MappingException {
int n = persister.countSubclassProperties();
for (int i = 0; i < n; i++) {
Type type = persister.getSubclassPropertyType(i);
if (type.isAssociationType()) {
walkEntityAssociationTree(
(AssociationType) type,
persister,
i,
alias,
path,
persister.isSubclassPropertyNullable(i),
currentDepth);
} else if (type.isComponentType()) {
walkComponentTree(
(CompositeType) type,
i,
0,
persister,
alias,
path.append(persister.getSubclassPropertyName(i)),
currentDepth);
}
}
// if the entity has a composite identifier, see if we need to handle
// its sub-properties separately
final Type idType = persister.getIdentifierType();
if (idType.isComponentType()) {
final CompositeType cidType = (CompositeType) idType;
if (cidType.isEmbedded()) {
// we have an embedded composite identifier. Most likely we need to process the composite
// properties separately, although there is an edge case where the identifier is really
// a simple identifier (single value) wrapped in a JPA @IdClass or even in the case of a
// a simple identifier (single value) wrapped in a Hibernate composite type.
//
// We really do not have a built-in method to determine that. However, generally the
// persister would report that there is single, physical identifier property which is
// explicitly at odds with the notion of "embedded composite". So we use that for now
if (persister.getEntityMetamodel().getIdentifierProperty().isEmbedded()) {
walkComponentTree(cidType, -1, 0, persister, alias, path.append(""), currentDepth);
}
}
}
}
