de.saxsys.synchronizefx.core.metamodel

Class ListPropertyMetaDataStore

java.lang.Object

de.saxsys.synchronizefx.core.metamodel.ListPropertyMetaDataStore

public class ListPropertyMetaDataStore
extends Object

Weakly stores meta data about Lists needed to keep them synchronous with other peers.

Weakly means, that when the garbage collector decides to collect a list properties its version assignment in this class may be collected as well.

Author:

Raik Bieniek

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ListPropertyMetaDataStore.ListPropertyMetaData The meta data about a List.

Constructor Summary

Constructors

Constructor and Description
ListPropertyMetaDataStore(WeakObjectRegistry objectRegistry) Creates a new instance with all its dependencies.

Method Summary

Methods

Modifier and Type	Method and Description
ListPropertyMetaDataStore.ListPropertyMetaData	getMetaDataOrFail(List<?> list) Returns the meta data for a given List.
ListPropertyMetaDataStore.ListPropertyMetaData	getMetaDataOrFail(UUID listId) Returns the meta data for a List with a given id.
boolean	hasMetaDataFor(List<?> list) Checks if this meta data store does already have meta data for a given list.
void	storeMetaDataOrFail(List<?> list, ListPropertyMetaDataStore.ListPropertyMetaData metaData) Stores meta data for a new List.

Methods inherited from class java.lang.Object

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

Constructor Detail

ListPropertyMetaDataStore

public ListPropertyMetaDataStore(WeakObjectRegistry objectRegistry)

Creates a new instance with all its dependencies.

Parameters:

objectRegistry - Used to retrieve list by their id.

Method Detail

getMetaDataOrFail

public ListPropertyMetaDataStore.ListPropertyMetaData getMetaDataOrFail(List<?> list)

Returns the meta data for a given List.

Parameters:

list - The list thats meta data should be returned.

Returns:

The meta data for the list.

getMetaDataOrFail

public ListPropertyMetaDataStore.ListPropertyMetaData getMetaDataOrFail(UUID listId)
                                                                 throws ObjectToIdMappingException

Returns the meta data for a List with a given id.

Performance hint: If a reference to the list property itself is available, the method getMetaDataOrFail(List) should be used as this saves a lookup in a map.

Parameters:

listId - The id of the Listt thats meta data should be returned.

Returns:

The meta data for the Listt if known.

Throws:

ObjectToIdMappingException - When no meta data for the list with the passed id is known.

storeMetaDataOrFail

public void storeMetaDataOrFail(List<?> list,
                       ListPropertyMetaDataStore.ListPropertyMetaData metaData)
                         throws ObjectToIdMappingException

Stores meta data for a new List.

Parameters:

list - The list that meta data should be stored for.

metaData - The initial meta data for the new List.

Throws:

ObjectToIdMappingException - If the list isn't. That means that there is already meta data stored for a List with listId

hasMetaDataFor

public boolean hasMetaDataFor(List<?> list)

Checks if this meta data store does already have meta data for a given list.

Parameters:

list - The list that should be checked for already having meta data.

Returns:

true if meta data is known and false if not.