Package de.aristaflow.adept2.model.worklistmodel

Class AssuringWorklistUpdate

java.lang.Object

de.aristaflow.adept2.model.common.defaultimplementation.DefaultUserAttributeContainer

de.aristaflow.adept2.model.common.defaultimplementation.SerialisableUserAttributeContainer

de.aristaflow.adept2.model.worklistmodel.AssuringWorklistUpdate

All Implemented Interfaces:

UserAttributeContainer, WorklistUpdate, Serializable

public class AssuringWorklistUpdate
extends de.aristaflow.adept2.model.common.defaultimplementation.SerialisableUserAttributeContainer
implements WorklistUpdate

A worklist update may contain soft update types, that is, it is unclear whether an item is added or changed or removed or not present at all. This stems from using filters making the previous status of the item undecidable. When first incorporating an update into a worklist, this is decidable. For the subsequent users of the WorklistUpdate, for instance ClientWorklistListener, the soft state can be assured and a hard state can be set using this class.
This class allows to override the update type of specific worklist items. By assuring the update types WorklistConstants.WorklistItemUpdateType.ADDED_OR_CHANGED to either WorklistConstants.WorklistItemUpdateType.ADDED or WorklistConstants.WorklistItemUpdateType.CHANGED and WorklistConstants.WorklistItemUpdateType.REMOVED_OR_NOTHING to either WorklistConstants.WorklistItemUpdateType.REMOVED or complete removal of the item from the update.

Author:

Ulrich Kreher

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected final long	initialisationDate	The date of the last initialisation of the worklist.
protected final Map<ClientWorklistItem,WorklistItemUpdate<ClientWorklistItem>>	itemUpdates	All items of the worklist update in which the types will be set to hard if appropriate.
protected final int	maxPriority	The highest priority of all items of this update.
protected final long	sourceRevision	The source revision of the update.
protected final long	targetRevision	The target revision of the update.
protected final UUID	worklistID	The worklist ID.

Constructor Summary

Constructors

Constructor	Description
AssuringWorklistUpdate(UUID worklistID, long initialisationDate, int maxPriority, long sourceRevision, long targetRevision, Collection<WorklistItemUpdate<ClientWorklistItem>> updates, Map<String,String> userAttributes)	Creates a new wrapper for the designated worklist update allowing to override and assure the update type of specific worklist items.

Method Summary

Modifier and Type	Method	Description
void	assureWorklistItemAdded(ClientWorklistItem item)	Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.ADDED.
void	assureWorklistItemChanged(ClientWorklistItem item)	Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.CHANGED.
void	assureWorklistItemRemoved(ClientWorklistItem item)	Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.REMOVED.
void	assureWorklistItemUnknown(ClientWorklistItem item)	Removes the designated worklist item from this worklist update.
Collection<WorklistItemUpdate<ClientWorklistItem>>	getAll()	Returns all updates, i.e.
int	getMaxPriority()	Returns the highest priority of this update, that is the highest priority of all items of this update.
WorklistRevision	getSourceRevision()	Gets the source revision, i.e.
long	getTargetRevision()	Returns the target revision, i.e.
UUID	getWorklistID()	The ID of the worklist for which this update is intended.

Methods inherited from class de.aristaflow.adept2.model.common.defaultimplementation.DefaultUserAttributeContainer

getUserAttributes, getUserAttributeValue, removeUserAttributeValue, setUserAttributes, setUserAttributeValue, subEquals, subHashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.aristaflow.adept2.model.common.UserAttributeContainer

getUserAttributes, getUserAttributeValue, removeUserAttributeValue, setUserAttributeValue

Field Details

itemUpdates

protected final Map<ClientWorklistItem,WorklistItemUpdate<ClientWorklistItem>> itemUpdates

All items of the worklist update in which the types will be set to hard if appropriate.

worklistID

protected final UUID worklistID

The worklist ID.

sourceRevision

protected final long sourceRevision

The source revision of the update.

targetRevision

protected final long targetRevision

The target revision of the update.

initialisationDate

protected final long initialisationDate

The date of the last initialisation of the worklist.

maxPriority

protected final int maxPriority

The highest priority of all items of this update.

Constructor Details

AssuringWorklistUpdate

public AssuringWorklistUpdate(UUID worklistID,
 long initialisationDate,
 int maxPriority,
 long sourceRevision,
 long targetRevision,
 Collection<WorklistItemUpdate<ClientWorklistItem>> updates,
 Map<String,String> userAttributes)

Creates a new wrapper for the designated worklist update allowing to override and assure the update type of specific worklist items.

Parameters:

worklistID -

initialisationDate -

maxPriority -

sourceRevision -

targetRevision -

updates - The worklist item which to be wrapped and of which to override and assure update types of specific worklist items.

userAttributes -

Method Details

getWorklistID

public UUID getWorklistID()

Description copied from interface: WorklistUpdate

The ID of the worklist for which this update is intended.

Specified by:

getWorklistID in interface WorklistUpdate

Returns:

The ID of the worklist for which this update is intended.

getSourceRevision

public WorklistRevision getSourceRevision()

Description copied from interface: WorklistUpdate

Gets the source revision, i.e. the worklist revision (initialisation date and update count) to which this update can be applied. An exception is the initial revision can always be applied (by clearing the list before applying the update). The update contains all changes that have been made to the worklist since the update count of the source revision up to (and including) the target revision (update count).

Specified by:

getSourceRevision in interface WorklistUpdate

Returns:

The source revision, i.e. the revision of the worklist (initialisation date and update count) to which this update can be applied.

getTargetRevision

public long getTargetRevision()

Description copied from interface: WorklistUpdate

Returns the target revision, i.e. the new revision (update count) the client worklist will have after applying this update.

The update contains all changes that have been made to the worklist since the source revision (update count) up to (and including) the target revision.

Like the source revision the target revision refers to the initialisation date of the worklist.

Specified by:

getTargetRevision in interface WorklistUpdate

Returns:

The target revision, i.e. the new revision the client worklist will have after applying this update.

getMaxPriority

public int getMaxPriority()

Description copied from interface: WorklistUpdate

Returns the highest priority of this update, that is the highest priority of all items of this update. This also includes removed items! In case of an empty complete update (source revision 0), the priority will be WorklistConstants.Priority.NORMAL.

Specified by:

getMaxPriority in interface WorklistUpdate

Returns:

The highest priority of all items of this update.

getAll

public Collection<WorklistItemUpdate<ClientWorklistItem>> getAll()

Description copied from interface: WorklistUpdate

Returns all updates, i.e. the differences from the source revision up to (and including) the target revision. The map contains all worklist items including the ones which are deleted since the source revision.

The returned collection is unmodifiable.

When compiling the individual recorded updates into a worklist update, the case when there are multiple recorded updates for the same worklist item (i.e. same ID, not necessarily same state) needs special attention. In this case the recorded updates need to be compressed, since a worklist update may only contain one update per worklist item. It is assumed, that every revision only contains one added, removed or changed worklist item. To compress these individual updates, only the first (since the source revision) and the last recorded update of a certain worklist item need to be considered: The state of the client worklist item (which is the key of the map), is the state at the time of its last update.
The WorklistConstants.WorklistItemUpdateType (which is the value in the map) is determined by looking at the type of the first and the last recorded update for that item. The following shows the relevant combinations and their results.

How different worklist item update types aggregate.

type of first recorded update	type of last recorded update	resulting update type
ADDED	CHANGED	ADDED
ADDED	REMOVED	omit (NOTHING)
ADDED	ADDED_OR_CHANGED	ADDED
ADDED	REMOVED_OR_NOTHING	omit (NOTHING)
CHANGED	CHANGED	CHANGED
CHANGED	REMOVED	REMOVED
CHANGED	ADDED_OR_CHANGED	CHANGED
CHANGED	REMOVED_OR_NOTHING	REMOVED
REMOVED	ADDED	CHANGED
REMOVED	ADDED_OR_CHANGED	CHANGED
REMOVED	REMOVED_OR_NOTHING	REMOVED
ADDED_OR_CHANGED	CHANGED	ADDED_OR_CHANGED
ADDED_OR_CHANGED	REMOVED	REMOVED_OR_NOTHING
ADDED_OR_CHANGED	ADDED_OR_CHANGED	ADDED_OR_CHANGED
ADDED_OR_CHANGED	REMOVED_OR_NOTHING	REMOVED_OR_NOTHING
REMOVED_OR_NOTHING	ADDED	ADDED_OR_CHANGED
REMOVED_OR_NOTHING	ADDED_OR_CHANGED	ADDED_OR_CHANGED
REMOVED_OR_NOTHING	REMOVED_OR_NOTHING	REMOVED_OR_NOTHING

Other combinations don't make any sense and therefore shouldn't occur. If there's only one recorded update for an item use that update's type.

Specified by:

getAll in interface WorklistUpdate

Returns:

The updates / differences between source and target revision.

assureWorklistItemAdded

public void assureWorklistItemAdded(ClientWorklistItem item)

Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.ADDED. The designated worklist originally had the update type WorklistConstants.WorklistItemUpdateType.ADDED_OR_CHANGED. Assuring the update simplifies worklist update handling since soft states are eliminated.

Parameters:

item - The worklist item which had the soft update type WorklistConstants.WorklistItemUpdateType.ADDED_OR_CHANGED and has effectively been added. This changes its update type to WorklistConstants.WorklistItemUpdateType.ADDED.

assureWorklistItemChanged

public void assureWorklistItemChanged(ClientWorklistItem item)

Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.CHANGED. The designated worklist originally had the update type WorklistConstants.WorklistItemUpdateType.ADDED_OR_CHANGED. Assuring the update simplifies worklist update handling since soft states are eliminated.

Parameters:

item - The worklist item which had the soft update type WorklistConstants.WorklistItemUpdateType.ADDED_OR_CHANGED and has effectively been changed. This changes its update type to WorklistConstants.WorklistItemUpdateType.CHANGED.

assureWorklistItemRemoved

public void assureWorklistItemRemoved(ClientWorklistItem item)

Sets the worklist update type of the designated worklist item to WorklistConstants.WorklistItemUpdateType.REMOVED. The designated worklist originally had the update type WorklistConstants.WorklistItemUpdateType.REMOVED_OR_NOTHING. Assuring the update simplifies worklist update handling since soft states are eliminated.

Parameters:

item - The worklist item which had the soft update type WorklistConstants.WorklistItemUpdateType.REMOVED_OR_NOTHING and has effectively been removed. This changes its update type to WorklistConstants.WorklistItemUpdateType.REMOVED.

assureWorklistItemUnknown

public void assureWorklistItemUnknown(ClientWorklistItem item)

Removes the designated worklist item from this worklist update. The designated worklist originally had the update type WorklistConstants.WorklistItemUpdateType.REMOVED_OR_NOTHING. Assuring the update simplifies worklist update handling since soft states are eliminated.

Parameters:

item - The worklist item which had the soft update type WorklistConstants.WorklistItemUpdateType.REMOVED_OR_NOTHING and has effectively been unknown before. This removes the worklist item from this update.S