private void CreateIndexes(Configuration config, Collection collection)
{
if(collection.Element is ManyToOne)
{
// many-to-many collection
// collect all columns that participate in foreign keys
HybridSet columns = new HybridSet();
foreach (ForeignKey fk in collection.CollectionTable.ForeignKeyIterator)
{
CollectionUtils.ForEach(fk.ColumnIterator,
delegate(Column col)
{
columns.Add(col);
});
}
// there should always be exactly 2 "foreign key' columns in a many-many join table, AFAIK
if (columns.Count != 2)
{
throw new Exception("SNAFU");
}
List<Column> indexColumns = new List<Column>(new TypeSafeEnumerableWrapper<Column>(columns));
// create two indexes, each containing both columns, going in both directions
CreateIndex(collection.CollectionTable, indexColumns);
indexColumns.Reverse();
CreateIndex(collection.CollectionTable, indexColumns);
}
else
{
// this is a value collection, or a one-to-many collection
// find the foreign-key that refers back to the owner table (assume there is only one of these - is this always true??)
ForeignKey foreignKey = CollectionUtils.SelectFirst<ForeignKey>(collection.CollectionTable.ForeignKeyIterator,
delegate (ForeignKey fk) { return Equals(fk.ReferencedTable, collection.Table); });
// create an index on all columns in this foreign key
if(foreignKey != null)
{
CreateIndex(collection.CollectionTable, new TypeSafeEnumerableWrapper<Column>(foreignKey.ColumnIterator));
}
}
}
/**
* @param mainGenerator Main generator, giving access to configuration and the basic mapper.
* @param propertyValue Value of the collection, as mapped by Hibernate.
* @param currentMapper Mapper, to which the appropriate {@link org.hibernate.envers.entities.mapper.PropertyMapper}
* will be added.
* @param referencingEntityName Name of the entity that owns this collection.
* @param xmlMappingData In case this collection requires a middle table, additional mapping documents will
* be created using this object.
* @param propertyAuditingData Property auditing (meta-)data. Among other things, holds the name of the
* property that references the collection in the referencing entity, the user data for middle (join)
* table and the value of the <code>@MapKey</code> annotation, if there was one.
*/
public CollectionMetadataGenerator(AuditMetadataGenerator mainGenerator,
Mapping.Collection propertyValue, ICompositeMapperBuilder currentMapper,
String referencingEntityName, EntityXmlMappingData xmlMappingData,
PropertyAuditingData propertyAuditingData) {
this.mainGenerator = mainGenerator;
this.propertyValue = propertyValue;
this.currentMapper = currentMapper;
this.referencingEntityName = referencingEntityName;
this.xmlMappingData = xmlMappingData;
this.propertyAuditingData = propertyAuditingData;
this.propertyName = propertyAuditingData.Name;
referencingEntityConfiguration = mainGenerator.EntitiesConfigurations[referencingEntityName];
if (referencingEntityConfiguration == null) {
throw new MappingException("Unable to read auditing configuration for " + referencingEntityName + "!");
}
referencedEntityName = MappingTools.getReferencedEntityName(propertyValue.Element);
}
/**
* @param mainGenerator Main generator, giving access to configuration and the basic mapper.
* @param propertyValue Value of the collection, as mapped by Hibernate.
* @param currentMapper Mapper, to which the appropriate {@link org.hibernate.envers.entities.mapper.PropertyMapper}
* will be added.
* @param referencingEntityName Name of the entity that owns this collection.
* @param xmlMappingData In case this collection requires a middle table, additional mapping documents will
* be created using this object.
* @param propertyAuditingData Property auditing (meta-)data. Among other things, holds the name of the
* property that references the collection in the referencing entity, the user data for middle (join)
* table and the value of the <code>@MapKey</code> annotation, if there was one.
*/
public CollectionMetadataGenerator(AuditMetadataGenerator mainGenerator,
Mapping.Collection propertyValue, ICompositeMapperBuilder currentMapper,
String referencingEntityName, EntityXmlMappingData xmlMappingData,
PropertyAuditingData propertyAuditingData)
{
this.mainGenerator = mainGenerator;
this.propertyValue = propertyValue;
this.currentMapper = currentMapper;
this.referencingEntityName = referencingEntityName;
this.xmlMappingData = xmlMappingData;
this.propertyAuditingData = propertyAuditingData;
this.propertyName = propertyAuditingData.Name;
referencingEntityConfiguration = mainGenerator.EntitiesConfigurations[referencingEntityName];
if (referencingEntityConfiguration == null)
{
throw new MappingException("Unable to read auditing configuration for " + referencingEntityName + "!");
}
referencedEntityName = MappingTools.getReferencedEntityName(propertyValue.Element);
}
public Component(Collection collection)
: base(collection.CollectionTable)
{
owner = collection.Owner;
}
