com.vaadin.data.util.

java.lang.Object
- com.vaadin.data.util.ContainerHierarchicalWrapper

All Implemented Interfaces:

Container, Container.Hierarchical, Container.ItemSetChangeNotifier, Container.PropertySetChangeNotifier, Serializable
```
public class ContainerHierarchicalWrapper
extends Object
implements Container.Hierarchical, Container.ItemSetChangeNotifier, Container.PropertySetChangeNotifier
```
A wrapper class for adding external hierarchy to containers not implementing the Container.Hierarchical 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 updateHierarchicalWrapper() method.

Since:

3.0

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

Constructors
Constructor Description

ContainerHierarchicalWrapper(Container toBeWrapped)
Constructs a new hierarchical wrapper for an existing Container.

Method Summary

All Methods
Modifier and Type	Method	Description
`boolean`	`addContainerProperty(Object propertyId, Class<?> type, Object defaultValue)`	Adds 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 hierarchy.
`Item`	`addItem(Object itemId)`	Adds a new Item by its ID to the underlying container and to the hierarchy.
`void`	`addItemSetChangeListener(Container.ItemSetChangeListener listener)`	Adds an Item set change listener for the object.
`void`	`addListener(Container.ItemSetChangeListener listener)`	Deprecated. As of 7.0, replaced by `addItemSetChangeListener(Container.ItemSetChangeListener)`
`void`	`addListener(Container.PropertySetChangeListener listener)`	Deprecated. As of 7.0, replaced by `addPropertySetChangeListener(Container.PropertySetChangeListener)`
`void`	`addPropertySetChangeListener(Container.PropertySetChangeListener listener)`	Registers a new Property set change listener for this Container.
`boolean`	`areChildrenAllowed(Object itemId)`	Tests if the Item with given ID can have children.
`boolean`	`containsId(Object itemId)`	Tests if the Container contains the specified Item.
`Collection<?>`	`getChildren(Object itemId)`	Gets the IDs of all Items that are children of the specified Item.
`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.
`Object`	`getParent(Object itemId)`	Gets the ID of the parent Item of the specified Item.
`Class<?>`	`getType(Object propertyId)`	Gets the data type of all Properties identified by the given Property ID.
`boolean`	`hasChildren(Object itemId)`	Tests if the Item specified with `itemId` has child Items or if it is a leaf.
`boolean`	`isRoot(Object itemId)`	Tests if the Item specified with `itemId` is a root Item.
`boolean`	`removeAllItems()`	Removes all items from the underlying container and from the hierarcy.
`boolean`	`removeContainerProperty(Object propertyId)`	Removes the specified Property from the underlying container and from the hierarchy.
`boolean`	`removeItem(Object itemId)`	Removes an Item specified by the itemId from the underlying container and from the hierarchy.
`boolean`	`removeItemRecursively(Object itemId)`	Removes the Item identified by given itemId and all its children.
`void`	`removeItemSetChangeListener(Container.ItemSetChangeListener listener)`	Removes the Item set change listener from the object.
`void`	`removeListener(Container.ItemSetChangeListener listener)`	Deprecated. As of 7.0, replaced by `removeItemSetChangeListener(Container.ItemSetChangeListener)`
`void`	`removeListener(Container.PropertySetChangeListener listener)`	Deprecated. As of 7.0, replaced by `removePropertySetChangeListener(Container.PropertySetChangeListener)`
`void`	`removePropertySetChangeListener(Container.PropertySetChangeListener listener)`	Removes a previously registered Property set change listener.
`Collection<?>`	`rootItemIds()`	Gets the IDs of all Items in the container that don't have a parent.
`boolean`	`setChildrenAllowed(Object itemId, boolean childrenAllowed)`	Sets the given Item's capability to have children.
`boolean`	`setParent(Object itemId, Object newParentId)`	Sets the parent of an Item.
`int`	`size()`	Gets the number of visible Items in the Container.
`void`	`updateHierarchicalWrapper()`	Updates the wrapper's internal hierarchy data 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
  - ContainerHierarchicalWrapper
```
public ContainerHierarchicalWrapper(Container toBeWrapped)
```
    Constructs a new hierarchical wrapper for an existing Container. Works even if the to-be-wrapped container already implements the Container.Hierarchical interface.
    
    Parameters:
    
    toBeWrapped - the container that needs to be accessed hierarchically
    
    See Also:
    
    updateHierarchicalWrapper()
- Method Detail
  - updateHierarchicalWrapper
```
public void updateHierarchicalWrapper()
```
    Updates the wrapper's internal hierarchy data to include all Items in the underlying container. If the contents of the wrapped container change without the wrapper's knowledge, this method needs to be called to update the hierarchy information of the Items.
  - areChildrenAllowed
```
public boolean areChildrenAllowed(Object itemId)
```
    Description copied from interface: Container.Hierarchical
    
    Tests if the Item with given ID can have children.
    
    Specified by:
    
    areChildrenAllowed in interface Container.Hierarchical
    
    Parameters:
    
    itemId - ID of the Item in the container whose child capability is to be tested
    
    Returns:
    
    true if the specified Item exists in the Container and it can have children, false if it's not found from the container or it can't have children.
  - getChildren
```
public Collection<?> getChildren(Object itemId)
```
    Description copied from interface: Container.Hierarchical
    
    Gets the IDs of all Items that are children of the specified Item. The returned collection is unmodifiable.
    
    Specified by:
    
    getChildren in interface Container.Hierarchical
    
    Parameters:
    
    itemId - ID of the Item whose children the caller is interested in
    
    Returns:
    
    An unmodifiable collection containing the IDs of all other Items that are children in the container hierarchy; null if item does not have any children.
  - getParent
```
public Object getParent(Object itemId)
```
    Description copied from interface: Container.Hierarchical
    
    Gets the ID of the parent Item of the specified Item.
    
    Specified by:
    
    getParent in interface Container.Hierarchical
    
    Parameters:
    
    itemId - ID of the Item whose parent the caller wishes to find out.
    
    Returns:
    
    the ID of the parent Item. Will be null if the specified Item is a root element.
  - hasChildren
```
public boolean hasChildren(Object itemId)
```
    Description copied from interface: Container.Hierarchical
    
    Tests if the Item specified with itemId has child Items or if it is a leaf. The Container.Hierarchical.getChildren(Object itemId) method always returns null for leaf Items.
    
    Note that being a leaf does not imply whether or not an Item is allowed to have children.
    
    Specified by:
    
    hasChildren in interface Container.Hierarchical
    
    Parameters:
    
    itemId - ID of the Item to be tested
    
    Returns:
    
    true if the specified Item has children, false if not (is a leaf)
  - isRoot
```
public boolean isRoot(Object itemId)
```
    Description copied from interface: Container.Hierarchical
    
    Tests if the Item specified with itemId is a root Item. The hierarchical container can have more than one root and must have at least one unless it is empty. The Container.Hierarchical.getParent(Object itemId) method always returns null for root Items.
    
    Specified by:
    
    isRoot in interface Container.Hierarchical
    
    Parameters:
    
    itemId - ID of the Item whose root status is to be tested
    
    Returns:
    
    true if the specified Item is a root, false if not
  - rootItemIds
```
public Collection<?> rootItemIds()
```
    Description copied from interface: Container.Hierarchical
    
    Gets the IDs of all Items in the container that don't have a parent. Such items are called root Items. The returned collection is unmodifiable.
    
    Specified by:
    
    rootItemIds in interface Container.Hierarchical
    
    Returns:
    
    An unmodifiable collection containing IDs of all root elements of the container
  - setChildrenAllowed
```
public boolean setChildrenAllowed(Object itemId,
                                  boolean childrenAllowed)
```
    Sets the given Item's capability to have children. If the Item identified with the itemId already has children and the areChildrenAllowed is false this method fails and false is returned; the children must be first explicitly removed with setParent(Object itemId, Object newParentId) or Container.removeItem(Object itemId).
    
    Specified by:
    
    setChildrenAllowed in interface Container.Hierarchical
    
    Parameters:
    
    itemId - the ID of the Item in the container whose child capability is to be set.
    
    childrenAllowed - the boolean value specifying if the Item can have children or not.
    
    Returns:
    
    true if the operation succeeded, false if not
  - setParent
```
public boolean setParent(Object itemId,
                         Object newParentId)
```
    Sets the parent of an Item. The new parent item must exist and be able to have children. (canHaveChildren(newParentId) == true). It is also possible to detach a node from the hierarchy (and thus make it root) by setting the parent null.
    
    Specified by:
    
    setParent in interface Container.Hierarchical
    
    Parameters:
    
    itemId - the ID of the item to be set as the child of the Item identified with newParentId.
    
    newParentId - the ID of the Item that's to be the new parent of the Item identified with itemId.
    
    Returns:
    
    true if the operation succeeded, false if not
  - addItem
```
public Object addItem()
               throws UnsupportedOperationException
```
    Creates a new Item into the Container, assigns it an automatic ID, and adds it to the hierarchy.
    
    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
```
    Adds a new Item by its ID to the underlying container and to the hierarchy.
    
    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 hierarcy.
    
    Specified by:
    
    removeAllItems in interface Container
    
    Returns:
    
    true if the operation succeeded, false if not
    
    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 hierarchy.
    
    Specified by:
    
    removeItem in interface Container
    
    Specified by:
    
    removeItem in interface Container.Hierarchical
    
    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.
  - removeItemRecursively
```
public boolean removeItemRecursively(Object itemId)
```
    Removes the Item identified by given itemId and all its children.
    
    Parameters:
    
    itemId - the identifier of the Item to be removed
    
    Returns:
    
    true if the operation succeeded
    
    See Also:
    
    removeItem(Object)
  - addContainerProperty
```
public boolean addContainerProperty(Object propertyId,
                                    Class<?> type,
                                    Object defaultValue)
                             throws UnsupportedOperationException
```
    Adds 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 addContainerProperty is not supported.
  - removeContainerProperty
```
public boolean removeContainerProperty(Object propertyId)
                                throws UnsupportedOperationException
```
    Removes the specified Property from the underlying container and from the hierarchy.
    Note : The Property will be removed from all 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
  - addItemSetChangeListener
```
public void addItemSetChangeListener(Container.ItemSetChangeListener listener)
```
    Description copied from interface: Container.ItemSetChangeNotifier
    
    Adds an Item set change listener for the object.
    
    Specified by:
    
    addItemSetChangeListener in interface Container.ItemSetChangeNotifier
    
    Parameters:
    
    listener - listener to be added
  - addListener
```
@Deprecated
public void addListener(Container.ItemSetChangeListener listener)
```
    Deprecated.
    As of 7.0, replaced by addItemSetChangeListener(Container.ItemSetChangeListener)
    
    Specified by:
    
    addListener in interface Container.ItemSetChangeNotifier
  - removeItemSetChangeListener
```
public void removeItemSetChangeListener(Container.ItemSetChangeListener listener)
```
    Description copied from interface: Container.ItemSetChangeNotifier
    
    Removes the Item set change listener from the object.
    
    Specified by:
    
    removeItemSetChangeListener in interface Container.ItemSetChangeNotifier
    
    Parameters:
    
    listener - listener to be removed
  - removeListener
```
@Deprecated
public void removeListener(Container.ItemSetChangeListener listener)
```
    Deprecated.
    As of 7.0, replaced by removeItemSetChangeListener(Container.ItemSetChangeListener)
    
    Specified by:
    
    removeListener in interface Container.ItemSetChangeNotifier
  - addPropertySetChangeListener
```
public void addPropertySetChangeListener(Container.PropertySetChangeListener listener)
```
    Description copied from interface: Container.PropertySetChangeNotifier
    
    Registers a new Property set change listener for this Container.
    
    Specified by:
    
    addPropertySetChangeListener in interface Container.PropertySetChangeNotifier
    
    Parameters:
    
    listener - The new Listener to be registered
  - addListener
```
@Deprecated
public void addListener(Container.PropertySetChangeListener listener)
```
    Deprecated.
    As of 7.0, replaced by addPropertySetChangeListener(Container.PropertySetChangeListener)
    
    Specified by:
    
    addListener in interface Container.PropertySetChangeNotifier
  - removePropertySetChangeListener
```
public void removePropertySetChangeListener(Container.PropertySetChangeListener listener)
```
    Description copied from interface: Container.PropertySetChangeNotifier
    
    Removes a previously registered Property set change listener.
    
    Specified by:
    
    removePropertySetChangeListener in interface Container.PropertySetChangeNotifier
    
    Parameters:
    
    listener - Listener to be removed
  - removeListener
```
@Deprecated
public void removeListener(Container.PropertySetChangeListener listener)
```
    Deprecated.
    As of 7.0, replaced by removePropertySetChangeListener(Container.PropertySetChangeListener)
    
    Specified by:
    
    removeListener in interface Container.PropertySetChangeNotifier

com.vaadin.data.util.

Class ContainerHierarchicalWrapper

Nested Class Summary

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

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ContainerHierarchicalWrapper

Method Detail

updateHierarchicalWrapper

areChildrenAllowed

getChildren

getParent

hasChildren

isRoot

rootItemIds

setChildrenAllowed

setParent

addItem

addItem

removeAllItems

removeItem

removeItemRecursively

addContainerProperty

removeContainerProperty

containsId

getItem

getItemIds

getContainerProperty

getContainerPropertyIds

getType

size

addItemSetChangeListener

addListener

removeItemSetChangeListener

removeListener

addPropertySetChangeListener

addListener

removePropertySetChangeListener

removeListener