Example usage for org.hibernate.persister.collection CollectionPersister getSize

Introduction

In this page you can find the example usage for org.hibernate.persister.collection CollectionPersister getSize.

Prototype

int getSize(Serializable key, SharedSessionContractImplementor session);

Source Link

Usage

From source file:com.amalto.core.storage.hibernate.TypeMapping.java

License:Open Source License

@SuppressWarnings({ "rawtypes", "unchecked" })
protected static <T> List<T> getFullList(List valueList) {
    if (valueList == null) {
        return null;
    }/*from   ww w. j  a  va2s . c  o m*/
    if (!(valueList instanceof PersistentList)) {
        return valueList;
    }
    PersistentList list = (PersistentList) valueList;
    List<T> fullList = new LinkedList<T>();
    SessionImplementor session = list.getSession();
    if (!session.isConnected()) {
        throw new IllegalStateException("Session is not connected: impossible to read values from database."); //$NON-NLS-1$
    }
    CollectionEntry entry = session.getPersistenceContext().getCollectionEntry(list);
    CollectionPersister persister = entry.getLoadedPersister();
    if (persister != null) {
        int databaseSize = persister.getSize(entry.getKey(), session);
        if (list.size() == databaseSize && !list.contains(null)) {
            // No need to reload a list (no omission in list and size() corresponds to size read from database).
            return list;
        }
        for (int i = 0; i < databaseSize; i++) {
            T wrapper = (T) persister.getElementByIndex(entry.getLoadedKey(), i, session, list.getOwner());
            fullList.add(wrapper);
        }
    }
    // Returns a unmodifiable list -> returned list is *not* a persistent list so change tracking is not possible,
    // returning a unmodifiable list is a safety for code using returned list.
    return Collections.unmodifiableList(fullList);
}

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From source file:org.eclipse.emf.cdo.server.internal.hibernate.tuplizer.WrappedHibernateList.java

License:Open Source License

public int size() {
    if (cachedSize != -1) {
        return cachedSize;
    }// w w  w  .ja va 2s  .  co m
    if (getDelegate() instanceof AbstractPersistentCollection) {
        final AbstractPersistentCollection collection = (AbstractPersistentCollection) getDelegate();
        if (collection.wasInitialized()) {
            cachedSize = -1;
            return getDelegate().size();
        }
        final SessionImplementor session = collection.getSession();
        CollectionEntry entry = session.getPersistenceContext().getCollectionEntry(collection);
        CollectionPersister persister = entry.getLoadedPersister();
        if (collection.hasQueuedOperations()) {
            session.flush();
        }
        cachedSize = persister.getSize(entry.getLoadedKey(), session);
        return cachedSize;
    }

    return getDelegate().size();
}

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