Examples with DynamicAttributesEntity com.haulmont.cuba.gui.data.DynamicAttributesEntity used on opensource projects

Example 1 with DynamicAttributesEntity

use of com.haulmont.cuba.gui.data.DynamicAttributesEntity in project cuba by cuba-platform.

the class DynamicAttributesGuiTools method getValueChangeEventListener.

/**
 * Returns {@code ValueChangeEventListener} for dynamic attribute that has one or more dependent attributes.
 * This listener recalculates values for all dependent dynamic attributes hierarchically. The listener uses
 * {@code recalculationInProgress} ThreadLocal variable to avoid unnecessary calculation.
 */
@SuppressWarnings("unchecked")
public Consumer<HasValue.ValueChangeEvent> getValueChangeEventListener(final CategoryAttribute attribute) {
    if (attribute.getConfiguration().getDependentAttributes() != null && !attribute.getConfiguration().getDependentAttributes().isEmpty()) {
        return valueChangeEvent -> {
            if (Boolean.TRUE.equals(recalculationInProgress.get())) {
                return;
            }
            try {
                recalculationInProgress.set(true);
                com.haulmont.cuba.gui.components.Component component = valueChangeEvent.getComponent();
                if (component instanceof HasValueSource) {
                    {
                        BaseGenericIdEntity entity = null;
                        String attributeCode = DynamicAttributesUtils.encodeAttributeCode(attribute.getCode());
                        if (((HasValueSource) component).getValueSource() instanceof ContainerValueSource) {
                            ContainerValueSource valueSource = (ContainerValueSource) ((HasValueSource) component).getValueSource();
                            InstanceContainer container = valueSource.getContainer();
                            if (container.getItem() instanceof BaseGenericIdEntity) {
                                entity = (BaseGenericIdEntity) container.getItem();
                            }
                        } else if (((HasValueSource) component).getValueSource() instanceof DatasourceValueSource) {
                            DatasourceValueSource valueSource = (DatasourceValueSource) ((HasValueSource) component).getValueSource();
                            if (valueSource.getItem() instanceof BaseGenericIdEntity) {
                                entity = (BaseGenericIdEntity) valueSource.getItem();
                            } else if (valueSource.getItem() instanceof DynamicAttributesEntity) {
                                entity = ((DynamicAttributesEntity) valueSource.getItem()).getMainItem();
                            }
                        }
                        entity.setValue(attributeCode, valueChangeEvent.getValue());
                        recalculationTools.recalculateDynamicAttributes(entity, attribute);
                    }
                }
            } finally {
                recalculationInProgress.remove();
            }
        };
    }
    return null;
}