Examples of com.vaadin.data.Property$ReadOnlyStatusChangeNotifier

com.vaadin.data.Property
The interface for adding and removing ReadOnlyStatusChangeEvent listeners. If a Property wishes to allow other objects to receive ReadOnlyStatusChangeEvent generated by it, it must implement this interface.
Note : The general Java convention is not to explicitly declare that a class generates events, but to directly define the addListener and removeListener methods. That way the caller of these methods has no real way of finding out if the class really will send the events, or if it just defines the methods to be able to implement an interface.
@author Vaadin Ltd. @since 3.0

     */
    protected int compareProperty(Object propertyId, boolean sortDirection,
            Item item1, Item item2) {


        // Get the properties to compare
        final Property property1 = item1.getItemProperty(propertyId);
        final Property property2 = item2.getItemProperty(propertyId);


        // Get the values to compare
        final Object value1 = (property1 == null) ? null : property1.getValue();
        final Object value2 = (property2 == null) ? null : property2.getValue();


        // Result of the comparison
        int r = 0;
        if (sortDirection) {
            r = propertyValueComparator.compare(value1, value2);

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                if (cols > 0) {
                    for (int j = 0; j < cols; j++) {
                        if (isColumnCollapsed(colids[j])) {
                            continue;
                        }
                        Property p = null;
                        Object value = "";
                        boolean isGenerated = columnGenerators
                                .containsKey(colids[j]);


                        if (!isGenerated) {
                            p = getContainerProperty(id, colids[j]);
                        }


                        // check in current pageBuffer already has row
                        int index = firstIndex + i;
                        if (p != null || isGenerated) {
                            if (index < firstIndexNotInCache
                                    && index >= pageBufferFirstIndex) {
                                // we have data already in our cache,
                                // recycle it instead of fetching it via
                                // getValue/getPropertyValue
                                int indexInOldBuffer = index
                                        - pageBufferFirstIndex;
                                value = pageBuffer[CELL_FIRSTCOL + j][indexInOldBuffer];
                                if (!isGenerated && iscomponent[j]
                                        || !(value instanceof Component)) {
                                    listenProperty(p, oldListenedProperties);
                                }
                            } else {
                                if (isGenerated) {
                                    ColumnGenerator cg = columnGenerators
                                            .get(colids[j]);
                                    value = cg
                                            .generateCell(this, id, colids[j]);


                                } else if (iscomponent[j]) {
                                    value = p.getValue();
                                    listenProperty(p, oldListenedProperties);
                                } else if (p != null) {
                                    value = getPropertyValue(id, colids[j], p);
                                    /*
                                     * If returned value is Component (via

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        for (Iterator<?> i = ids.iterator(); i.hasNext(); row++) {
            Object rid = i.next();
            int col = 0;
            for (Iterator<?> j = cols.iterator(); j.hasNext(); col++) {
                Object cid = j.next();
                Property p = container.getContainerProperty(rid, cid);
                if (p != null) {
                    res[row][col] = getFormattedValue(p);
                }
            }
        }

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                }
                break;


            }
            if (getItemIconPropertyId() != null) {
                final Property p = getContainerProperty(itemId,
                        getItemIconPropertyId());
                if (p != null && p instanceof Property.ValueChangeNotifier) {
                    ((Property.ValueChangeNotifier) p)
                            .addValueChangeListener(getCaptionChangeListener());
                    captionChangeNotifiers.add(p);

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            for (int j = 0; j < cols; j++) {
                if (isColumnCollapsed(colids[j])) {
                    continue;
                }
                Property p = null;
                Object value = "";
                boolean isGeneratedRow = generatedRow != null;
                boolean isGeneratedColumn = columnGenerators
                        .containsKey(colids[j]);
                boolean isGenerated = isGeneratedRow || isGeneratedColumn;


                if (!isGenerated) {
                    try {
                        p = getContainerProperty(id, colids[j]);
                    } catch (Exception e) {
                        exceptionsDuringCachePopulation.add(e);
                        value = null;
                    }


                }


                if (isGeneratedRow) {
                    if (generatedRow.isSpanColumns() && j > 0) {
                        value = null;
                    } else if (generatedRow.isSpanColumns() && j == 0
                            && generatedRow.getValue() instanceof Component) {
                        value = generatedRow.getValue();
                    } else if (generatedRow.getText().length > j) {
                        value = generatedRow.getText()[j];
                    }
                } else {
                    // check in current pageBuffer already has row
                    int index = firstIndex + i;
                    if (p != null || isGenerated) {
                        int indexInOldBuffer = index - pageBufferFirstIndex;
                        if (index < firstIndexNotInCache
                                && index >= pageBufferFirstIndex
                                && pageBuffer[CELL_GENERATED_ROW][indexInOldBuffer] == null
                                && id.equals(pageBuffer[CELL_ITEMID][indexInOldBuffer])) {
                            // we already have data in our cache,
                            // recycle it instead of fetching it via
                            // getValue/getPropertyValue
                            value = pageBuffer[CELL_FIRSTCOL + j][indexInOldBuffer];
                            if (!isGeneratedColumn && iscomponent[j]
                                    || !(value instanceof Component)) {
                                listenProperty(p, oldListenedProperties);
                            }
                        } else {
                            if (isGeneratedColumn) {
                                ColumnGenerator cg = columnGenerators
                                        .get(colids[j]);
                                try {
                                    value = cg
                                            .generateCell(this, id, colids[j]);
                                } catch (Exception e) {
                                    exceptionsDuringCachePopulation.add(e);
                                    value = null;
                                }


                                if (value != null
                                        && !(value instanceof Component)
                                        && !(value instanceof String)) {
                                    // Avoid errors if a generator returns
                                    // something
                                    // other than a Component or a String
                                    value = value.toString();
                                }
                            } else if (iscomponent[j]) {
                                try {
                                    value = p.getValue();
                                } catch (Exception e) {
                                    exceptionsDuringCachePopulation.add(e);
                                    value = null;
                                }

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                        if (cellVal instanceof Component
                                && visibleComponents.contains(cellVal)) {
                            visibleComponents.remove(cellVal);
                            unregisterComponent((Component) cellVal);
                        } else {
                            Property p = getContainerProperty(
                                    pageBuffer[CELL_ITEMID][i + ix], colids[c]);
                            if (p instanceof ValueChangeNotifier
                                    && listenedProperties.contains(p)) {
                                listenedProperties.remove(p);
                                ((ValueChangeNotifier) p).removeListener(this);

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         * Also remove property data sources to unregister listeners keeping the
         * fields in memory.
         */
        if (component instanceof Field) {
            Field field = (Field) component;
            Property associatedProperty = associatedProperties
                    .remove(component);
            if (associatedProperty != null
                    && field.getPropertyDataSource() == associatedProperty) {
                // Remove the property data source only if it's the one we
                // added in getPropertyValue

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        final Field field = fields.get(id);
        if (field == null) {
            // field does not exist or it is not (yet) created for this property
            return ownProperties.get(id);
        }
        final Property property = field.getPropertyDataSource();


        if (property != null) {
            return property;
        } else {
            return field;

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        }


        // 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) {
                    bindPropertyToField(id, property, f);

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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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