org.opennms.features.jmxconfiggenerator.webui.data

Class SelectableItem<T>

java.lang.Object

com.vaadin.data.util.PropertysetItem

org.opennms.features.jmxconfiggenerator.webui.data.SelectableItem<T>

Type Parameters:

T - The type of the Java Bean we want to use as a SelectableItem

All Implemented Interfaces:

com.vaadin.data.Item, com.vaadin.data.Item.PropertySetChangeNotifier, Serializable, Cloneable, Selectable

public class SelectableItem<T>
extends com.vaadin.data.util.PropertysetItem
implements Selectable

This class represents a selectable item. In encapsulates any java objects which fulfillths the java bean convention. In addition it implements Selectable which determines that this item can be selected. This class is mainly a rough copy of BeanItem, but due to some limitations in how the BeanItemContainer (or AbstractBeanContainer) handles the creation of a BeanItem I decided to implement a new SelectableItem. This may change in future releases in the vaadin core framework. So we may remove this item.

Author:

Markus von Rüden

See Also:

BeanItem, Serialized Form

Nested Class Summary

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

com.vaadin.data.Item.Editor, com.vaadin.data.Item.PropertySetChangeListener, com.vaadin.data.Item.PropertySetChangeNotifier, com.vaadin.data.Item.Viewer

Constructor Summary

Constructors

Constructor and Description
SelectableItem(T bean)

Method Summary

Methods

Modifier and Type	Method and Description
T	getBean()
protected static <T> Map<String,com.vaadin.data.util.VaadinPropertyDescriptor>	getPropertyDescriptors(Class<? super T> clazz) Note:This method is simmilar to BeanItem.getPropertyDescriptors(java.lang.Class) but adds an additional VaadinPropertyDescriptor to support a "is selectable" feature.
boolean	isSelected() Returns if selected or not.

Methods inherited from class com.vaadin.data.util.PropertysetItem

addItemProperty, addListener, addPropertySetChangeListener, clone, equals, getItemProperty, getItemPropertyIds, getListeners, hashCode, removeItemProperty, removeListener, removePropertySetChangeListener, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

SelectableItem

public SelectableItem(T bean)

Method Detail

isSelected

public boolean isSelected()

Description copied from interface: Selectable

Returns if selected or not.

Specified by:

isSelected in interface Selectable

Returns:

true if selected, false otherwise.

getBean

public T getBean()

getPropertyDescriptors

protected static <T> Map<String,com.vaadin.data.util.VaadinPropertyDescriptor> getPropertyDescriptors(Class<? super T> clazz)

Note:This method is simmilar to BeanItem.getPropertyDescriptors(java.lang.Class) but adds an additional VaadinPropertyDescriptor to support a "is selectable" feature. Because the earlier mentioned method is static, we cannot overwrite it. Therefore I decided to implement it in my own way.

In short: It lookups all methods which fullfill the java bean convention of clazz and builds accessors for it (read method, write method, etc. for a field, etc. Have a look at Introspector). And in addition we a new "accessor" for a selectable item is added.

In detail:
Introspector is used to get all PropertyDescriptors from the given class clazz. Each PropertyDescriptor is converted to a vaadin MethodPropertyDescriptor( MethodPropertyDescriptor is created. In addition a VaadinPropertyDescriptor is added to provide the "select" feature. For this we use the ObjectProperty of vaadin.

The build map is a mapping between property names and the VaadinPropertyDescriptors, whereby VaadinPropertyDescriptor.getName() is identically with the key of the returned map (and therefore represents the property name).

Type Parameters:

T -

Parameters:

clazz -

Returns: