ListTransformation.java 文件源码

private void initListEvents() {
    this.listChangeListener = new ListChangeListener<SourceType>() {
        @Override
        public void onChanged(
                Change<? extends SourceType> listEvent) {

            // We have to stage delete events, because if we process them
            // separately, there will be unwanted ChangeEvents on the
            // targetList
            List<TargetType> deleteStaging = new ArrayList<>();


            while (listEvent.next()) {
                if (listEvent.wasUpdated()) {
                    processUpdateEvent(listEvent);
                } else if (listEvent.wasReplaced()) {
                    processReplaceEvent(listEvent, deleteStaging);
                } else if (listEvent.wasAdded()) {
                    processAddEvent(listEvent);
                } else if (listEvent.wasRemoved()) {
                    processRemoveEvent(listEvent, deleteStaging);
                }
            }

            // Process the staged elements
            processStagingLists(deleteStaging);
        }
    };
    modelListProperty().addListener(
            new WeakListChangeListener<>(listChangeListener));

}