Hibernate collection mapping

name: the collection property name

table (optional - defaults to property name): the name of the collection table. It is not used for one-to-many associations.

schema (optional): the name of a table schema to override the schema declared on the root element

lazy (optional - defaults to true): disables lazy fetching and specifies that the association is always eagerly fetched. It can also be used to enable "extra-lazy" fetching where most operations do not initialize the collection. This is suitable for large collections.

inverse (optional - defaults to false): marks this collection as the "inverse" end of a bidirectional association.

cascade (optional - defaults to none): enables operations to cascade to child entities.

sort (optional): specifies a sorted collection with natural sort order or a given comparator class.

order-by (optional, JDK1.4 only): specifies a table column or columns that define the iteration order of the Map, Set or bag, together with an optional asc or desc.

where (optional): specifies an arbitrary SQL WHERE condition that is used when retrieving or removing the collection. This is useful if the collection needs to contain only a subset of the available data.

fetch (optional, defaults to select): chooses between outer-join fetching, fetching by sequential select, and fetching by sequential subselect.

batch-size (optional, defaults to 1): specifies a "batch size" for lazily fetching instances of this collection.

access (optional - defaults to property): the strategy Hibernate uses for accessing the collection property value.

optimistic-lock (optional - defaults to true): specifies that changes to the state of the collection results in increments of the owning entity's version. For one-to-many associations you may want to disable this setting.

mutable (optional - defaults to true): a value of false specifies that the elements of the collection never change. This allows for minor performance optimization in some cases.

 

unique (optional): enables the DDL generation of a unique constraint for the foreign-key column. This makes the association multiplicity effectively one-to-many.