com.vaadin.data.util
Class ContainerOrderedWrapper

java.lang.Object
  com.vaadin.data.util.ContainerOrderedWrapper

All Implemented Interfaces:

Container, Container.ItemSetChangeNotifier, Container.Ordered, Container.PropertySetChangeNotifier, Serializable

Direct Known Subclasses:

HierarchicalContainerOrderedWrapper

public class ContainerOrderedWrapper
extends Object
implements Container.Ordered, Container.ItemSetChangeNotifier, Container.PropertySetChangeNotifier

A wrapper class for adding external ordering to containers not implementing the Container.Ordered interface.

If the wrapped container is changed directly (that is, not through the wrapper), and does not implement Container.ItemSetChangeNotifier and/or Container.PropertySetChangeNotifier the hierarchy information must be updated with the updateOrderWrapper() method.

Since:

3.0

Version:

7.0.0.alpha3

Author:

Vaadin Ltd.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface com.vaadin.data.Container

Container.Editor, Container.Filter, Container.Filterable, Container.Hierarchical, Container.Indexed, Container.ItemSetChangeEvent, Container.ItemSetChangeListener, Container.ItemSetChangeNotifier, Container.Ordered, Container.PropertySetChangeEvent, Container.PropertySetChangeListener, Container.PropertySetChangeNotifier, Container.SimpleFilterable, Container.Sortable, Container.Viewer

Constructor Summary

ContainerOrderedWrapper(Container toBeWrapped)
Constructs a new ordered wrapper for an existing Container.

Method Summary

boolean	addContainerProperty(Object propertyId, Class<?> type, Object defaultValue) Registers a new Property to all Items in the Container.
Object	addItem() Creates a new Item into the Container, assigns it an automatic ID, and adds it to the ordering.
Item	addItem(Object itemId) Registers a new Item by its ID to the underlying container and to the ordering.
Object	addItemAfter(Object previousItemId) Adds a new item after the given item.
Item	addItemAfter(Object previousItemId, Object newItemId) Adds a new item after the given item.
void	addListener(Container.ItemSetChangeListener listener) Adds an Item set change listener for the object.
void	addListener(Container.PropertySetChangeListener listener) Registers a new Property set change listener for this Container.
boolean	containsId(Object itemId) Tests if the Container contains the specified Item.
Object	firstItemId() Gets the ID of the first Item in the Container.
Property<?>	getContainerProperty(Object itemId, Object propertyId) Gets the Property identified by the given itemId and propertyId from the Container.
Collection<?>	getContainerPropertyIds() Gets the ID's of all Properties stored in the Container.
Item	getItem(Object itemId) Gets the Item with the given Item ID from the Container.
Collection<?>	getItemIds() Gets the ID's of all visible (after filtering and sorting) Items stored in the Container.
Class<?>	getType(Object propertyId) Gets the data type of all Properties identified by the given Property ID.
boolean	isFirstId(Object itemId) Tests if the Item corresponding to the given Item ID is the first Item in the Container.
boolean	isLastId(Object itemId) Tests if the Item corresponding to the given Item ID is the last Item in the Container.
Object	lastItemId() Gets the ID of the last Item in the Container..
Object	nextItemId(Object itemId) Gets the ID of the Item following the Item that corresponds to itemId.
Object	prevItemId(Object itemId) Gets the ID of the Item preceding the Item that corresponds to itemId.
boolean	removeAllItems() Removes all items from the underlying container and from the ordering.
boolean	removeContainerProperty(Object propertyId) Removes the specified Property from the underlying container and from the ordering.
boolean	removeItem(Object itemId) Removes an Item specified by the itemId from the underlying container and from the ordering.
void	removeListener(Container.ItemSetChangeListener listener) Removes the Item set change listener from the object.
void	removeListener(Container.PropertySetChangeListener listener) Removes a previously registered Property set change listener.
int	size() Gets the number of visible Items in the Container.
void	updateOrderWrapper() Updates the wrapper's internal ordering information to include all Items in the underlying container.

Methods inherited from class java.lang.Object

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

Constructor Detail

ContainerOrderedWrapper

public ContainerOrderedWrapper(Container toBeWrapped)

Constructs a new ordered wrapper for an existing Container. Works even if the to-be-wrapped container already implements the Container.Ordered interface.

Parameters:

toBeWrapped - the container whose contents need to be ordered.

Method Detail

updateOrderWrapper

public void updateOrderWrapper()

Updates the wrapper's internal ordering information to include all Items in the underlying container.

Note : If the contents of the wrapped container change without the wrapper's knowledge, this method needs to be called to update the ordering information of the Items.

firstItemId

public Object firstItemId()

Description copied from interface: Container.Ordered

Gets the ID of the first Item in the Container.

Specified by:

firstItemId in interface Container.Ordered

Returns:

ID of the first visible Item in the Container

isFirstId

public boolean isFirstId(Object itemId)

Description copied from interface: Container.Ordered

Tests if the Item corresponding to the given Item ID is the first Item in the Container.

Specified by:

isFirstId in interface Container.Ordered

Parameters:

itemId - ID of an Item in the Container

Returns:

true if the Item is first visible item in the Container, false if not

isLastId

public boolean isLastId(Object itemId)

Description copied from interface: Container.Ordered

Tests if the Item corresponding to the given Item ID is the last Item in the Container.

Specified by:

isLastId in interface Container.Ordered

Returns:

true if the Item is last visible item in the Container, false if not

lastItemId

public Object lastItemId()

Description copied from interface: Container.Ordered

Gets the ID of the last Item in the Container..

Specified by:

lastItemId in interface Container.Ordered

Returns:

ID of the last visible Item in the Container

nextItemId

public Object nextItemId(Object itemId)

Description copied from interface: Container.Ordered

Gets the ID of the Item following the Item that corresponds to itemId. If the given Item is the last or not found in the Container, null is returned.

Specified by:

nextItemId in interface Container.Ordered

Parameters:

itemId - ID of a visible Item in the Container

Returns:

ID of the next visible Item or null

prevItemId

public Object prevItemId(Object itemId)

Description copied from interface: Container.Ordered

Gets the ID of the Item preceding the Item that corresponds to itemId. If the given Item is the first or not found in the Container, null is returned.

Specified by:

prevItemId in interface Container.Ordered

Parameters:

itemId - ID of a visible Item in the Container

Returns:

ID of the previous visible Item or null

addContainerProperty

public boolean addContainerProperty(Object propertyId,
                                    Class<?> type,
                                    Object defaultValue)
                             throws UnsupportedOperationException

Registers a new Property to all Items in the Container.

Specified by:

addContainerProperty in interface Container

Parameters:

propertyId - the ID of the new Property.

type - the Data type of the new Property.

defaultValue - the value all created Properties are initialized to.

Returns:

true if the operation succeeded, false if not

Throws:

UnsupportedOperationException - if the container does not support explicitly adding container properties

addItem

public Object addItem()
               throws UnsupportedOperationException

Creates a new Item into the Container, assigns it an automatic ID, and adds it to the ordering.

Specified by:

addItem in interface Container

Returns:

the autogenerated ID of the new Item or null if the operation failed

Throws:

UnsupportedOperationException - if the addItem is not supported.

addItem

public Item addItem(Object itemId)
             throws UnsupportedOperationException

Registers a new Item by its ID to the underlying container and to the ordering.

Specified by:

addItem in interface Container

Parameters:

itemId - the ID of the Item to be created.

Returns:

the added Item or null if the operation failed

Throws:

UnsupportedOperationException - if the addItem is not supported.

removeAllItems

public boolean removeAllItems()
                       throws UnsupportedOperationException

Removes all items from the underlying container and from the ordering.

Specified by:

removeAllItems in interface Container

Returns:

true if the operation succeeded, otherwise false

Throws:

UnsupportedOperationException - if the removeAllItems is not supported.

removeItem

public boolean removeItem(Object itemId)
                   throws UnsupportedOperationException

Removes an Item specified by the itemId from the underlying container and from the ordering.

Specified by:

removeItem in interface Container

Parameters:

itemId - the ID of the Item to be removed.

Returns:

true if the operation succeeded, false if not

Throws:

UnsupportedOperationException - if the removeItem is not supported.

removeContainerProperty

public boolean removeContainerProperty(Object propertyId)
                                throws UnsupportedOperationException

Removes the specified Property from the underlying container and from the ordering.

Note : The Property will be removed from all the Items in the Container.

Specified by:

removeContainerProperty in interface Container

Parameters:

propertyId - the ID of the Property to remove.

Returns:

true if the operation succeeded, false if not

Throws:

UnsupportedOperationException - if the removeContainerProperty is not supported.

containsId

public boolean containsId(Object itemId)

Description copied from interface: Container

Tests if the Container contains the specified Item. Filtering can hide items so that they will not be visible through the container API, and this method should respect visibility of items (i.e. only indicate visible items as being in the container) if feasible for the container.

Specified by:

containsId in interface Container

Parameters:

itemId - ID the of Item to be tested

Returns:

boolean indicating if the Container holds the specified Item

getItem

public Item getItem(Object itemId)

Description copied from interface: Container

Gets the Item with the given Item ID from the Container. If the Container does not contain the requested Item, null is returned. Containers should not return Items that are filtered out.

Specified by:

getItem in interface Container

Parameters:

itemId - ID of the Item to retrieve

Returns:

the Item with the given ID or null if the Item is not found in the Container

getItemIds

public Collection<?> getItemIds()

Description copied from interface: Container

Gets the ID's of all visible (after filtering and sorting) Items stored in the Container. The ID's cannot be modified through the returned collection. If the container is Container.Ordered, the collection returned by this method should follow that order. If the container is Container.Sortable, the items should be in the sorted order. Calling this method for large lazy containers can be an expensive operation and should be avoided when practical.

Specified by:

getItemIds in interface Container

Returns:

unmodifiable collection of Item IDs

getContainerProperty

public Property<?> getContainerProperty(Object itemId,
                                        Object propertyId)

Description copied from interface: Container

Gets the Property identified by the given itemId and propertyId from the Container. If the Container does not contain the item or it is filtered out, or the Container does not have the Property, null is returned.

Specified by:

getContainerProperty in interface Container

Parameters:

itemId - ID of the visible Item which contains the Property

propertyId - ID of the Property to retrieve

Returns:

Property with the given ID or null

getContainerPropertyIds

public Collection<?> getContainerPropertyIds()

Description copied from interface: Container

Gets the ID's of all Properties stored in the Container. The ID's cannot be modified through the returned collection.

Specified by:

getContainerPropertyIds in interface Container

Returns:

unmodifiable collection of Property IDs

getType

public Class<?> getType(Object propertyId)

Description copied from interface: Container

Gets the data type of all Properties identified by the given Property ID.

Specified by:

getType in interface Container

Parameters:

propertyId - ID identifying the Properties

Returns:

data type of the Properties

size

public int size()

Description copied from interface: Container

Gets the number of visible Items in the Container. Filtering can hide items so that they will not be visible through the container API.

Specified by:

size in interface Container

Returns:

number of Items in the Container

addListener

public void addListener(Container.ItemSetChangeListener listener)

Description copied from interface: Container.ItemSetChangeNotifier

Adds an Item set change listener for the object.

Specified by:

addListener in interface Container.ItemSetChangeNotifier

Parameters:

listener - listener to be added

removeListener

public void removeListener(Container.ItemSetChangeListener listener)

Description copied from interface: Container.ItemSetChangeNotifier

Removes the Item set change listener from the object.

Specified by:

removeListener in interface Container.ItemSetChangeNotifier

Parameters:

listener - listener to be removed

addListener

public void addListener(Container.PropertySetChangeListener listener)

Description copied from interface: Container.PropertySetChangeNotifier

Registers a new Property set change listener for this Container.

Specified by:

addListener in interface Container.PropertySetChangeNotifier

Parameters:

listener - The new Listener to be registered

removeListener

public void removeListener(Container.PropertySetChangeListener listener)

Description copied from interface: Container.PropertySetChangeNotifier

Removes a previously registered Property set change listener.

Specified by:

removeListener in interface Container.PropertySetChangeNotifier

Parameters:

listener - Listener to be removed

addItemAfter

public Item addItemAfter(Object previousItemId,
                         Object newItemId)
                  throws UnsupportedOperationException

Description copied from interface: Container.Ordered

Adds a new item after the given item.

Adding an item after null item adds the item as first item of the ordered container.

Specified by:

addItemAfter in interface Container.Ordered

Parameters:

previousItemId - Id of the visible item in ordered container after which to insert the new item.

newItemId - Id of the new item to be added.

Returns:

new item or null if the operation fails.

Throws:

UnsupportedOperationException - if the operation is not supported by the container

See Also:

Ordered: adding items in filtered or sorted containers

addItemAfter

public Object addItemAfter(Object previousItemId)
                    throws UnsupportedOperationException

Description copied from interface: Container.Ordered

Adds a new item after the given item.

Adding an item after null item adds the item as first item of the ordered container.

Specified by:

addItemAfter in interface Container.Ordered

Parameters:

previousItemId - Id of the visible item in ordered container after which to insert the new item.

Returns:

item id the the created new item or null if the operation fails.

Throws:

UnsupportedOperationException - if the operation is not supported by the container

See Also:

Ordered: adding items in filtered or sorted containers