Examples of com.vaadin.data.Property

com.vaadin.data.Property

The Property is a simple data object that contains one typed value. This interface contains methods to inspect and modify the stored value and its type, and the object's read-only state.

The Property also defines the events ReadOnlyStatusChangeEvent and ValueChangeEvent, and the associated listener and notifier interfaces.

The Property.Viewer interface should be used to attach the Property to an external data source. This way the value in the data source can be inspected using the Property interface.

The Property.editor interface should be implemented if the value needs to be changed through the implementing class.
@param T type of values of the property @author Vaadin Ltd @since 3.0

        }


        // Adds all the properties to this form
        for (final Iterator i = propertyIds.iterator(); i.hasNext();) {
            final Object id = i.next();
            final Property property = itemDatasource.getItemProperty(id);
            if (id != null && property != null) {
                final Field f = fieldFactory.createField(itemDatasource, id,
                        this);
                if (f != null) {
                    f.setPropertyDataSource(property);

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                        descriptions[i].toString());
            }
        }


        // Sets the property data source
        final Property property = oldField.getPropertyDataSource();
        oldField.setPropertyDataSource(null);
        newField.setPropertyDataSource(property);


        // Replaces the old field with new one
        layout.replaceComponent(oldField, newField);

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                caption = itemId.toString();
            }
            break;


        case ITEM_CAPTION_MODE_PROPERTY:
            final Property p = getContainerProperty(itemId,
                    getItemCaptionPropertyId());
            if (p != null) {
                caption = p.toString();
            }
            break;
        }


        // All items must have some captions

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        if (getItemIconPropertyId() == null) {
            return null;
        }


        final Property ip = getContainerProperty(itemId,
                getItemIconPropertyId());
        if (ip == null) {
            return null;
        }
        final Object icon = ip.getValue();
        if (icon instanceof Resource) {
            return (Resource) icon;
        }


        return null;

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                    captionChangeNotifiers.add(i);
                }
                Collection pids = i.getItemPropertyIds();
                if (pids != null) {
                    for (Iterator it = pids.iterator(); it.hasNext();) {
                        Property p = i.getItemProperty(it.next());
                        if (p != null
                                && p instanceof Property.ValueChangeNotifier) {
                            ((Property.ValueChangeNotifier) p)
                                    .addListener(getCaptionChangeListener());
                            captionChangeNotifiers.add(p);
                        }
                    }


                }
                break;
            case ITEM_CAPTION_MODE_PROPERTY:
                final Property p = getContainerProperty(itemId,
                        getItemCaptionPropertyId());
                if (p != null && p instanceof Property.ValueChangeNotifier) {
                    ((Property.ValueChangeNotifier) p)
                            .addListener(getCaptionChangeListener());
                    captionChangeNotifiers.add(p);

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        final int count = metadata.getColumnCount();
        final ArrayList list = new ArrayList(count);
        for (int i = 1; i <= count; i++) {
            final String columnName = metadata.getColumnName(i);
            list.add(columnName);
            final Property p = getContainerProperty(new Integer(1), columnName);
            propertyTypes.put(columnName,
                    p == null ? Object.class : p.getType());
        }
        propertyIds = Collections.unmodifiableCollection(list);
    }

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     *            The BeanItem that contains the property
     * @param propertyId
     *            The id of the property
     */
    private void addValueChangeListener(BeanItem<BT> beanItem, Object propertyId) {
        Property property = beanItem.getItemProperty(propertyId);
        if (property instanceof ValueChangeNotifier) {
            // avoid multiple notifications for the same property if
            // multiple filters are in use
            ValueChangeNotifier notifier = (ValueChangeNotifier) property;
            notifier.removeListener(this);

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     *            The BeanItem that contains the property
     * @param propertyId
     *            The id of the property
     */
    private void removeValueChangeListener(BeanItem<BT> item, Object propertyId) {
        Property property = item.getItemProperty(propertyId);
        if (property instanceof ValueChangeNotifier) {
            ((ValueChangeNotifier) property).removeListener(this);
        }
    }

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        for (PropertyDescriptor pd : propertyDescriptors.values()) {
            final Method getMethod = pd.getReadMethod();
            final Method setMethod = pd.getWriteMethod();
            final Class<?> type = pd.getPropertyType();
            final String name = pd.getName();
            final Property p = new MethodProperty(type, bean, getMethod,
                    setMethod);
            addItemProperty(name, p);


        }
    }

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            if (pd != null) {
                final String name = pd.getName();
                final Method getMethod = pd.getReadMethod();
                final Method setMethod = pd.getWriteMethod();
                final Class<?> type = pd.getPropertyType();
                final Property p = new MethodProperty(type, bean, getMethod,
                        setMethod);
                addItemProperty(name, p);
            }
        }

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