Package org.apache.openjpa.kernel

Interface Extent<T>

All Known Implementing Classes:
DelegatingExtent, ExtentImpl
public interface Extent<T>
Representation of all members of a persistent class.
Author:
Abe White, Patrick Linskey

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    closeAll()
    Close all open iterators.
    Broker
    getBroker()
    The broker that generated the extent.
    Class<T>
    getElementType()
    The class of extent elements.
    FetchConfiguration
    getFetchConfiguration()
    Return the (mutable) fetch configuration for this extent.
    boolean
    getIgnoreChanges()
    Whether this extent will ignore changes made in the current transaction.
    boolean
    hasSubclasses()
    Whether the extent includes subclasses.
    Iterator<T>
    iterator()
    Return an iterator over the extent members.
    List<T>
    list()
    Returns a list of all objects represented by this extent.
    void
    lock()
    Synchronizes on an internal lock.
    void
    setIgnoreChanges(boolean ignoreChanges)
    Whether this extent will ignore changes made in the current transaction.
    void
    unlock()
    Release the internal lock.

  • Method Details

    • getFetchConfiguration

      FetchConfiguration getFetchConfiguration()
      Return the (mutable) fetch configuration for this extent.

    • getIgnoreChanges

      boolean getIgnoreChanges()
      Whether this extent will ignore changes made in the current transaction.

    • setIgnoreChanges

      void setIgnoreChanges(boolean ignoreChanges)
      Whether this extent will ignore changes made in the current transaction.

    • list

      List<T> list()
      Returns a list of all objects represented by this extent. This method creates a List by traversing the entire iterator returned by a call to iterator(). This means that Collection.size() will work correctly, but if the extent represents a large data set, this method may be quite slow and may consume quite a bit of memory.

    • iterator

      Iterator<T> iterator()
      Return an iterator over the extent members.

    • getBroker

      Broker getBroker()
      The broker that generated the extent.

    • getElementType

      Class<T> getElementType()
      The class of extent elements.

    • hasSubclasses

      boolean hasSubclasses()
      Whether the extent includes subclasses.

    • closeAll

      void closeAll()
      Close all open iterators.

    • lock

      void lock()
      Synchronizes on an internal lock.

    • unlock

      void unlock()
      Release the internal lock.