Interface Cache

Method Detail

• contains

  boolean contains(Class cls,
                   Object primaryKey)

  Whether the cache contains data for the given entity.

  Parameters:

  cls - entity class

  primaryKey - primary key

  Returns:

  boolean indicating whether the entity is in the cache

• evict

  void evict(Class cls,
             Object primaryKey)

  Remove the data for the given entity from the cache.

  Parameters:

  cls - entity class

  primaryKey - primary key

• evict

  void evict(Class cls)

  Remove the data for entities of the specified class (and its subclasses) from the cache.

  Parameters:

  cls - entity class

• evictAll

  void evictAll()

  Clear the cache.

• unwrap

  <T> T unwrap(Class<T> cls)

  Return an object of the specified type to allow access to the provider-specific API. If the provider's Cache implementation does not support the specified class, the PersistenceException is thrown.

  Parameters:

  cls - the class of the object to be returned. This is normally either the underlying Cache implementation class or an interface that it implements.

  Returns:

  an instance of the specified class

  Throws:

  PersistenceException - if the provider does not support the call

  Since:

  Java Persistence 2.1