org.datanucleus

Class FetchGroupManager

java.lang.Object

org.datanucleus.FetchGroupManager

public class FetchGroupManager
extends Object

Manager for dynamic fetch groups. Manages a set of fetch groups with each FetchGroup for a particular class with a name. This class is thread safe.

Constructor Summary

Constructors

Constructor and Description
FetchGroupManager(NucleusContext ctx) Constructor for a FetchGroupManager for a particular Context.

Method Summary

Methods

Modifier and Type	Method and Description
void	addFetchGroup(FetchGroup grp) Method to add a dynamic fetch group.
void	clearFetchGroups() Clear out all fetch groups from use by this manager.
FetchGroup	createFetchGroup(Class cls, String name) Method to create a new FetchGroup for the class and name.
FetchGroup	getFetchGroup(Class cls, String name) Accessor for a fetch group for the specified class.
Set<FetchGroup>	getFetchGroupsWithName(String name) Accessor for the fetch groups for the specified name.
void	removeFetchGroup(FetchGroup grp) Method to remove a dynamic FetchGroup from use.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FetchGroupManager

public FetchGroupManager(NucleusContext ctx)

Constructor for a FetchGroupManager for a particular Context.

Parameters:

ctx - The Context

Method Detail

addFetchGroup

public void addFetchGroup(FetchGroup grp)

Method to add a dynamic fetch group.

Parameters:

grp - The fetch group

removeFetchGroup

public void removeFetchGroup(FetchGroup grp)

Method to remove a dynamic FetchGroup from use.

Parameters:

grp - The group

getFetchGroup

public FetchGroup getFetchGroup(Class cls,
                       String name)

Accessor for a fetch group for the specified class. If the fetch group of this name for this class doesn't exist then will create one.

Parameters:

cls - The class

name - Name of the group

Returns:

The FetchGroup

createFetchGroup

public FetchGroup createFetchGroup(Class cls,
                          String name)

Method to create a new FetchGroup for the class and name. Doesn't add it to the internally managed groups.

Parameters:

cls - The class

name - Name of the group

Returns:

The FetchGroup

getFetchGroupsWithName

public Set<FetchGroup> getFetchGroupsWithName(String name)

Accessor for the fetch groups for the specified name.

Parameters:

name - Name of the group

Returns:

The FetchGroup

clearFetchGroups

public void clearFetchGroups()

Clear out all fetch groups from use by this manager.