private static QueryImpl oneToManyQuery(
EntityManagerSimpleJPA em,
String attName,
String foreignKeyFieldName,
Object id,
Class typeInList,
List<PersistentProperty.OrderClause> orderBy) {
if (foreignKeyFieldName == null || foreignKeyFieldName.length() == 0) {
// use the class containing the OneToMany
foreignKeyFieldName = attName;
}
AnnotationInfo ai = em.getFactory().getAnnotationManager().getAnnotationInfo(typeInList);
Class refType = ai.getPersistentProperty(foreignKeyFieldName).getPropertyClass();
AnnotationInfo refAi = em.getAnnotationManager().getAnnotationInfo(refType);
String query = createOneToManyQuery(typeInList, foreignKeyFieldName, refAi, id, orderBy);
logger.finer("OneToMany query=" + query);
return new QueryImpl(em, query);
}
public static <T> T buildObject(
EntityManagerSimpleJPA em, Class<T> tClass, Object id, List<Attribute> atts) {
T newInstance;
/*
Why was this here? Should we merge if it exists though?
newInstance = em.cacheGet(tClass, id);
if (newInstance != null) {
return newInstance;
}*/
AnnotationInfo ai = em.getFactory().getAnnotationManager().getAnnotationInfo(tClass);
try {
// newInstance = tClass.newInstance();
// check for DTYPE to see if it's a subclass, must be a faster way to do this you'd think?
for (Attribute att : atts) {
if (att.getName().equals(EntityManagerFactoryImpl.DTYPE)) {
logger.finest("dtype=" + att.getValue());
ai =
em.getFactory()
.getAnnotationManager()
.getAnnotationInfoByDiscriminator(att.getValue());
if (ai == null) {
throw new PersistenceException(
new ClassNotFoundException(
"Could not build object with dtype = "
+ att.getValue()
+ ". Class not found or is not an @Entity."));
}
tClass = ai.getMainClass();
// check cache again with new class
newInstance = em.cacheGet(tClass, id);
if (newInstance != null) return newInstance;
break;
}
}
ObjectWithInterceptor owi = newEnancedInstance(em, tClass);
newInstance = (T) owi.getBean();
for (PersistentProperty field : ai.getPersistentProperties()) {
String attName = field.getFieldName();
String columnName = field.getColumnName();
if (field.isForeignKeyRelationship()) {
// lazy it up
Set<String> keys = getForeignKeys(em, field, columnName, atts);
logger.finest("keys=" + keys);
if (keys == null || keys.isEmpty()) {
continue;
}
// todo: stick a cache in here and check the cache for the instance before creating the
// lazy loader.
logger.finest(
"creating new lazy loading instance for field "
+ field.getFieldName()
+ " of class "
+ tClass.getSimpleName()
+ " with id "
+ id);
// Object toSet = newLazyLoadingInstance(retType, keys);
owi.getInterceptor().putForeignKey(attName, keys);
} else if (field.isInverseRelationship()) {
Class typeInList = field.getPropertyClass();
// todo: should this return null if there are no elements??
// LazyList lazyList = new LazyList(this, newInstance,
// annotation.mappedBy(), id, typeInList,
// factory.getAnnotationManager().getAnnotationInfo(typeInList));
List<PersistentProperty.OrderClause> orderBy = null;
if (List.class.isAssignableFrom(field.getRawClass())) {
orderBy = field.getOrderClauses();
}
LazyList lazyList =
new LazyList(
em,
typeInList,
oneToManyQuery(em, attName, field.getMappedBy(), id, typeInList, orderBy));
// Class retType = field.getReturnType();
// todo: assuming List for now, handle other collection types
field.setProperty(newInstance, lazyList);
} else if (field.isLob() || field.isJsonLob()) {
// handled in Proxy
String lobKeyAttributeName = field.getColumnName();
String lobKeyVal = getValueToSet(atts, lobKeyAttributeName, columnName);
logger.finest(
"lobkeyval to set on interceptor=" + lobKeyVal + " - fromatt=" + lobKeyAttributeName);
// TODO add multivalue support for LOB keys
if (lobKeyVal != null)
owi.getInterceptor().putForeignKey(attName, Collections.singleton(lobKeyVal));
} else if (field.getEnumType() != null) {
String val = getValueToSet(atts, attName, columnName);
if (val != null) {
Object enumVal = getEnumValue(field, val);
field.setProperty(newInstance, enumVal);
}
} else if (field.isId()) {
field.setProperty(newInstance, id);
} else {
Collection<String> val = getValuesToSet(atts, attName, columnName);
if (val != null && !val.isEmpty()) {
em.setFieldValue(tClass, newInstance, field, val);
}
}
}
} catch (Exception e) {
throw new PersistenceException(e);
}
em.cachePut(id, newInstance);
return newInstance;
}