public OneToManyPersister(
Collection collection,
CollectionRegionAccessStrategy cacheAccessStrategy,
Configuration cfg,
SessionFactoryImplementor factory)
throws MappingException, CacheException {
super(collection, cacheAccessStrategy, cfg, factory);
cascadeDeleteEnabled =
collection.getKey().isCascadeDeleteEnabled()
&& factory.getDialect().supportsCascadeDelete();
keyIsNullable = collection.getKey().isNullable();
keyIsUpdateable = collection.getKey().isUpdateable();
}
@SuppressWarnings({"unchecked"})
private String searchMappedBy(PersistentClass referencedClass, Collection collectionValue) {
Iterator<Property> assocClassProps = referencedClass.getPropertyIterator();
while (assocClassProps.hasNext()) {
Property property = assocClassProps.next();
if (Tools.iteratorsContentEqual(
property.getValue().getColumnIterator(), collectionValue.getKey().getColumnIterator())) {
return property.getName();
}
}
return null;
}
public void doSecondPass(java.util.Map persistentClasses, java.util.Map inheritedMetas)
throws MappingException {
if (log.isDebugEnabled()) log.debug("Second pass for collection: " + collection.getRole());
secondPass(persistentClasses, inheritedMetas);
collection.createAllKeys();
if (log.isDebugEnabled()) {
String msg = "Mapped collection key: " + columns(collection.getKey());
if (collection.isIndexed())
msg += ", index: " + columns(((IndexedCollection) collection).getIndex());
if (collection.isOneToMany()) {
msg += ", one-to-many: " + ((OneToMany) collection.getElement()).getReferencedEntityName();
} else {
msg += ", element: " + columns(collection.getElement());
}
log.debug(msg);
}
}
public void doSecondPass(java.util.Map persistentClasses) throws MappingException {
if (log.isDebugEnabled()) log.debug("Second pass for collection: " + collection.getRole());
secondPass(
persistentClasses,
localInheritedMetas); // using local since the inheritedMetas at this point is not the
// correct map since it is always the empty map
collection.createAllKeys();
if (log.isDebugEnabled()) {
String msg = "Mapped collection key: " + columns(collection.getKey());
if (collection.isIndexed())
msg += ", index: " + columns(((IndexedCollection) collection).getIndex());
if (collection.isOneToMany()) {
msg += ", one-to-many: " + ((OneToMany) collection.getElement()).getReferencedEntityName();
} else {
msg += ", element: " + columns(collection.getElement());
}
log.debug(msg);
}
}
@SuppressWarnings({"unchecked"})
private void addWithMiddleTable() {
LOG.debugf(
"Adding audit mapping for property %s.%s: collection with a join table",
referencingEntityName, propertyName);
// Generating the name of the middle table
String auditMiddleTableName;
String auditMiddleEntityName;
if (!StringTools.isEmpty(propertyAuditingData.getJoinTable().name())) {
auditMiddleTableName = propertyAuditingData.getJoinTable().name();
auditMiddleEntityName = propertyAuditingData.getJoinTable().name();
} else {
String middleTableName = getMiddleTableName(propertyValue, referencingEntityName);
auditMiddleTableName = mainGenerator.getVerEntCfg().getAuditTableName(null, middleTableName);
auditMiddleEntityName = mainGenerator.getVerEntCfg().getAuditEntityName(middleTableName);
}
LOG.debugf("Using join table name: %s", auditMiddleTableName);
// Generating the XML mapping for the middle entity, only if the relation isn't inverse.
// If the relation is inverse, will be later checked by comparing middleEntityXml with null.
Element middleEntityXml;
if (!propertyValue.isInverse()) {
// Generating a unique middle entity name
auditMiddleEntityName =
mainGenerator.getAuditEntityNameRegister().createUnique(auditMiddleEntityName);
// Registering the generated name
mainGenerator.getAuditEntityNameRegister().register(auditMiddleEntityName);
middleEntityXml =
createMiddleEntityXml(
auditMiddleTableName, auditMiddleEntityName, propertyValue.getWhere());
} else {
middleEntityXml = null;
}
// ******
// Generating the mapping for the referencing entity (it must be an entity).
// ******
// Getting the id-mapping data of the referencing entity (the entity that "owns" this
// collection).
IdMappingData referencingIdMapping = referencingEntityConfiguration.getIdMappingData();
// Only valid for an inverse relation; null otherwise.
String mappedBy;
// The referencing prefix is always for a related entity. So it has always the "_" at the end
// added.
String referencingPrefixRelated;
String referencedPrefix;
if (propertyValue.isInverse()) {
// If the relation is inverse, then referencedEntityName is not null.
mappedBy =
getMappedBy(
propertyValue.getCollectionTable(),
mainGenerator.getCfg().getClassMapping(referencedEntityName));
referencingPrefixRelated = mappedBy + "_";
referencedPrefix = StringTools.getLastComponent(referencedEntityName);
} else {
mappedBy = null;
referencingPrefixRelated = StringTools.getLastComponent(referencingEntityName) + "_";
referencedPrefix = referencedEntityName == null ? "element" : propertyName;
}
// Storing the id data of the referencing entity: original mapper, prefixed mapper and entity
// name.
MiddleIdData referencingIdData =
createMiddleIdData(referencingIdMapping, referencingPrefixRelated, referencingEntityName);
// Creating a query generator builder, to which additional id data will be added, in case this
// collection
// references some entities (either from the element or index). At the end, this will be used to
// build
// a query generator to read the raw data collection from the middle table.
QueryGeneratorBuilder queryGeneratorBuilder =
new QueryGeneratorBuilder(
mainGenerator.getGlobalCfg(),
mainGenerator.getVerEntCfg(),
mainGenerator.getAuditStrategy(),
referencingIdData,
auditMiddleEntityName);
// Adding the XML mapping for the referencing entity, if the relation isn't inverse.
if (middleEntityXml != null) {
// Adding related-entity (in this case: the referencing's entity id) id mapping to the xml.
addRelatedToXmlMapping(
middleEntityXml,
referencingPrefixRelated,
MetadataTools.getColumnNameIterator(propertyValue.getKey().getColumnIterator()),
referencingIdMapping);
}
// ******
// Generating the element mapping.
// ******
MiddleComponentData elementComponentData =
addValueToMiddleTable(
propertyValue.getElement(),
middleEntityXml,
queryGeneratorBuilder,
referencedPrefix,
propertyAuditingData.getJoinTable().inverseJoinColumns());
// ******
// Generating the index mapping, if an index exists.
// ******
MiddleComponentData indexComponentData = addIndex(middleEntityXml, queryGeneratorBuilder);
// ******
// Generating the property mapper.
// ******
// Building the query generator.
RelationQueryGenerator queryGenerator =
queryGeneratorBuilder.build(elementComponentData, indexComponentData);
// Creating common data
CommonCollectionMapperData commonCollectionMapperData =
new CommonCollectionMapperData(
mainGenerator.getVerEntCfg(),
auditMiddleEntityName,
propertyAuditingData.getPropertyData(),
referencingIdData,
queryGenerator);
// Checking the type of the collection and adding an appropriate mapper.
addMapper(commonCollectionMapperData, elementComponentData, indexComponentData);
// ******
// Storing information about this relation.
// ******
storeMiddleEntityRelationInformation(mappedBy);
}
