@LazyToOne: defines the lazyness option on @ManyToOne and @OneToOne associations. LazyToOneOption can be PROXY (ie use a proxy based lazy loading), NO_PROXY (use a bytecode enhancement based lazy loading - note that build time bytecode processing is necessary) and FALSE (association not lazy)

@LazyCollection: defines the lazyness option on @ManyToMany and @OneToMany associations. LazyCollectionOption can be TRUE (the collection is lazy and will be loaded when its state is accessed), EXTRA (the collection is lazy and all operations will try to avoid the collection loading, this is especially useful for huge collections when loading all the elements is not necessary) and FALSE (association not lazy)

@Fetch: defines the fetching strategy used to load the association. FetchMode can be SELECT (a select is triggered when the association needs to be loaded), SUBSELECT (only available for collections, use a subselect strategy - please refers to the Hibernate Reference Documentation for more information) or JOIN (use a SQL JOIN to load the association while loading the owner entity). JOIN overrides any lazy attribute (an association loaded through a JOIN strategy cannot be lazy).