Example usage for org.hibernate.collection.spi PersistentCollection hasQueuedOperations

Introduction

In this page you can find the example usage for org.hibernate.collection.spi PersistentCollection hasQueuedOperations.

Prototype

boolean hasQueuedOperations();

Source Link

Document

Does this instance have any "queued" operations?

Usage

From source file:org.granite.tide.hibernate4.HibernateDataChangePublishListener.java

License:Open Source License

@SuppressWarnings("unchecked")
public void onPreUpdateCollection(PreCollectionUpdateEvent event) {
    Object owner = event.getAffectedOwnerOrNull();
    if (DataPublishListener.handleExclude(owner))
        return;//w ww  .j a  va 2s.c o m

    CollectionEntry collectionEntry = event.getSession().getPersistenceContext()
            .getCollectionEntry(event.getCollection());

    String propertyName = collectionEntry.getRole().substring(
            collectionEntry.getLoadedPersister().getOwnerEntityPersister().getEntityName().length() + 1);

    Object change = getChange(collectionEntry.getLoadedPersister().getOwnerEntityPersister(),
            event.getSession(), event.getAffectedOwnerEntityName(), event.getAffectedOwnerIdOrNull(), owner);
    if (change == null || !(change instanceof Change))
        return;

    PersistentCollection newColl = event.getCollection();
    Serializable oldColl = collectionEntry.getSnapshot();

    if (oldColl == null && newColl.hasQueuedOperations()) {
        List<Object[]> added = new ArrayList<Object[]>();
        List<Object[]> removed = new ArrayList<Object[]>();
        List<Object[]> updated = new ArrayList<Object[]>();

        List<?> queuedOperations = get(newColl, "operationQueue", List.class);
        for (Object op : queuedOperations) {
            // Great !!
            if (op.getClass().getName().endsWith("$Add")) {
                added.add(new Object[] { get(op, "index"), get(op, "value") });
            } else if (op.getClass().getName().endsWith("$SimpleAdd")) {
                added.add(new Object[] { null, get(op, "value") });
            } else if (op.getClass().getName().endsWith("$Put")) {
                added.add(new Object[] { get(op, "index"), get(op, "value") });
            } else if (op.getClass().getName().endsWith("$Remove")) {
                removed.add(new Object[] { get(op, "index"), get(op, "old") });
            } else if (op.getClass().getName().endsWith("$SimpleRemove")) {
                removed.add(new Object[] { null, get(op, "value") });
            } else if (op.getClass().getName().endsWith("$Set")) {
                updated.add(new Object[] { get(op, "index"), get(op, "value") });
            }
        }

        CollectionChange[] collChanges = new CollectionChange[added.size() + removed.size() + updated.size()];
        int idx = 0;
        for (Object[] obj : added)
            collChanges[idx++] = new CollectionChange(1, obj[0], obj[1]);

        for (Object[] obj : removed) {
            Object value = obj[1];
            if (value != null && value.getClass().isAnnotationPresent(Entity.class)) {
                org.granite.util.Entity e = new org.granite.util.Entity(value);
                value = new ChangeRef(e.getName(), (String) get(value, "uid"),
                        (Serializable) e.getIdentifier());
            }
            collChanges[idx++] = new CollectionChange(-1, obj[0], value);
        }

        for (Object[] obj : updated)
            collChanges[idx++] = new CollectionChange(0, obj[0], obj[1]);

        ((Change) change).addCollectionChanges(propertyName, collChanges);
    } else if (oldColl != null && newColl instanceof List<?>) {
        List<?> oldSnapshot = (List<?>) oldColl;
        List<?> newList = (List<?>) newColl;

        List<Object[]> ops = Utils.diffLists(oldSnapshot, newList);

        CollectionChange[] collChanges = new CollectionChange[ops.size()];
        int idx = 0;
        for (Object[] obj : ops)
            collChanges[idx++] = new CollectionChange((Integer) obj[0], obj[1], obj[2]);

        ((Change) change).addCollectionChanges(propertyName, collChanges);
    } else if (oldColl != null && newColl instanceof Collection<?>) {
        Map<?, ?> oldSnapshot = (Map<?, ?>) oldColl;

        Set<Object> added = new HashSet<Object>();
        added.addAll((Collection<?>) newColl);
        added.removeAll(new HashSet<Object>(oldSnapshot.keySet()));

        Set<Object> removed = new HashSet<Object>();
        removed.addAll(new HashSet<Object>(oldSnapshot.keySet()));
        removed.removeAll((Collection<?>) newColl);

        CollectionChange[] collChanges = new CollectionChange[added.size() + removed.size()];
        int idx = 0;
        for (Object obj : added)
            collChanges[idx++] = new CollectionChange(1, null, obj);

        for (Object obj : removed)
            collChanges[idx++] = new CollectionChange(-1, null, obj);

        ((Change) change).addCollectionChanges(propertyName, collChanges);
    } else if (oldColl != null && newColl instanceof Map<?, ?>) {
        Map<?, ?> oldSnapshot = (Map<?, ?>) oldColl;

        Set<Entry<Object, Object>> added = new HashSet<Entry<Object, Object>>();
        added.addAll(((Map<Object, Object>) newColl).entrySet());
        added.removeAll(new HashMap<Object, Object>(oldSnapshot).entrySet());

        Set<Entry<Object, Object>> removed = new HashSet<Entry<Object, Object>>();
        removed.addAll(new HashMap<Object, Object>(oldSnapshot).entrySet());
        removed.removeAll(((Map<Object, Object>) newColl).entrySet());

        CollectionChange[] collChanges = new CollectionChange[added.size() + removed.size()];
        int idx = 0;
        for (Entry<?, ?> me : added)
            collChanges[idx++] = new CollectionChange(1, me.getKey(), me.getValue());

        for (Entry<?, ?> me : removed)
            collChanges[idx++] = new CollectionChange(-1, me.getKey(), me.getValue());

        ((Change) change).addCollectionChanges(propertyName, collChanges);
    }
}

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