public void setId(Long id) {
if (this.id != null) {
throw new IllegalStateException(this + " id cannot be changed");
}
this.getChanged().record("id", this.id, id);
this.id = id;
if (UoW.isOpen()) {
UoW.getIdentityMap().store(this);
}
}
public P get() {
if (this.instance == null && this.id != null) {
if (!UoW.isOpen()) {
throw new DisconnectedException();
}
if (!EagerLoading.isEnabled()) {
// will make a query for just this id, only if needed
this.instance = UoW.load(this.parentClass, this.id);
} else {
// see if the parent is loaded, but don't make a query while doing so (like UoW.load does)
this.instance = (P) UoW.getIdentityMap().findOrNull(this.parentClass, this.id);
if (this.instance == null) {
// get the parent ids of all currently-loaded child classes
Collection<Long> parentIds = new LinkedHashSet<Long>();
for (C child : UoW.getIdentityMap().getInstancesOf(this.childClass)) {
Long parentId = this.childColumn.getJdbcValue(child);
if (parentId != null) {
parentIds.add(parentId);
}
}
// subtract any ids that are already loaded
for (P parent : UoW.getIdentityMap().getInstancesOf(this.parentClass)) {
parentIds.remove(parent.getId());
}
// if even our own id was not in the list, that is bad, we're from another UoW
if (parentIds.size() == 0) {
throw new IllegalStateException("Instance has been disconnected from the UoW");
}
Select<P> q = Select.from(this.parentAlias);
q.where(this.parentAlias.getIdColumn().in(parentIds));
q.limit(UoW.getIdentityMap().getCurrentSizeLimit());
q.list(); // will populate the UoW IdentityMap with all fetched parents
this.instance = (P) UoW.getIdentityMap().findOrNull(this.parentClass, this.id);
}
}
}
return this.instance;
}
public Long id() {
if (UoW.isOpen() && get().getId() == null) {
UoW.flush();
}
return get().getId();
}