Hibernate multi-pair multi-directional relationship mapping cascade configuration

Many-to-many relationship mappings
Properties of the Set element:
Cascade: Cascading operations.
Value:
Save-update: Cascading Save Updates
Delete: Cascade Delete.
Note: In a many-to-many bidirectional relationship mapping, you cannot configure bidirectional cascade deletions. However, you can configure two-way cascading to save updates.

<set name= "Roles" table= "Sys_user_role" cascade= "Save-update,delete" >
<key column= "user_id" ></key>
<many-to-many class= "Sysrole" column= "role_id" ></many-to-many>
</set>

Hibernate multi-pair multi-directional relationship mapping cascade configuration