Hibernate JPA @MapKeyTemporal Example

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@MapKeyTemporal

The @MapKeyTemporal annotation is used to specify that the key of java.util.Map association is a @TemporalType (e.g. DATE, TIME, TIMESTAMP).


MapKeyTemporal annotation must be specified for persistent map keys of type Date and Calendar. It may only be specified for map keys of these types.
The MapKeyTemporal annotation can be applied to an element collection or relationship of type java.util.Map in conjunction with the ElementCollection, OneToMany, or ManyToMany annotation.

     Example:

     @OneToMany
     @MapKeyTemporal(DATE)
     protected java.util.Map<java.util.Date, Employee> employees;

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