com.whitestein.lsps.vaadin.ui

Class ViewModelMerger

java.lang.Object

com.whitestein.lsps.vaadin.ui.ViewModelMerger

All Implemented Interfaces:

Serializable

public abstract class ViewModelMerger
extends Object
implements Serializable

Merges view models.

Author:

mvy

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ViewModelMerger.MergeStrategy

Constructor Summary

Constructors

Constructor and Description
ViewModelMerger(UIScreen screen, ModelProviderClientService modelProviderService)

Method Summary

Modifier and Type	Method and Description
void	clear(Set<Variant<RecordHolder>> viewModelsToClear) Clears given view models manually.
protected abstract void	doPersist() Invoked from processViewModels(boolean, java.util.Set), after the view models are merged but before the view model post process actions are invoked.
void	merge(Set<Variant<RecordHolder>> viewModelsToMerge) Merges given view models manually.
void	processViewModels(boolean hasPersistActions, Set<UIViewModelAction> viewModelActions) Invoked after an event processing cycle.
ContextWrapper	registerViewModel(Variant.RecordVariant viewModel, ContextWrapper parent)
void	restore(Serializable uiState)
Serializable	save()

Methods inherited from class java.lang.Object

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

Constructor Detail

ViewModelMerger

public ViewModelMerger(UIScreen screen,
                       ModelProviderClientService modelProviderService)

Method Detail

processViewModels

public void processViewModels(boolean hasPersistActions,
                              Set<UIViewModelAction> viewModelActions)

Invoked after an event processing cycle. Merges/clears view models.

Parameters:

hasPersistActions - if true, there were some persist actions produced in last processing cycle.

viewModelActions - a list of view model actions, collected from listeners executed in last processing cycle.

merge

public void merge(Set<Variant<RecordHolder>> viewModelsToMerge)

Merges given view models manually.

Parameters:

viewModelsToMerge - a set of view model definitions to merge, not null.

clear

public void clear(Set<Variant<RecordHolder>> viewModelsToClear)

Clears given view models manually.

Parameters:

viewModelsToClear - a set of view model definitions to clear, not null.

doPersist

protected abstract void doPersist()
                           throws Exception

Invoked from processViewModels(boolean, java.util.Set), after the view models are merged but before the view model post process actions are invoked.

Throws:

Exception - on failure.

save

public Serializable save()

restore

public void restore(Serializable uiState)

registerViewModel

public ContextWrapper registerViewModel(Variant.RecordVariant viewModel,
                                        ContextWrapper parent)

Parameters:

viewModel -

parent -

Returns:

context for the given view model