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

Introduction

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

Prototype

int getSize(Serializable key, SharedSessionContractImplementor session);

Source Link

Usage

From source file:org.eclipse.emf.teneo.hibernate.LazyCollectionUtils.java

License:Open Source License

/**
 * Reads the size of a collection in a lazy manner, i.e. will try to not
 * load the collection from the database. The size is cached in the object,
 * so subsequent calls to this method will not result in additional database
 * queries. This until the collection changes then the cache is cleared.
 * //from  w  ww.java 2 s .c  o m
 * Note if the collection can not be lazy loaded (see the
 * {@link #isLazyLoadableCollection(Collection)}) then the size method is
 * called on the collection. This method call is probably not lazy.
 * 
 * @param coll
 *            the collection to get the size from
 * @return the size of the collection
 */
public static int size(Collection<?> coll) {
    if (!isLazyLoadableCollection(coll)) {
        return coll.size();
    }
    final PersistableDelegateList<?> persistableList = (PersistableDelegateList<?>) coll;
    final AbstractPersistentCollection persistentCollection = (AbstractPersistentCollection) persistableList
            .getDelegate();
    final SessionImplementor session = persistentCollection.getSession();
    final QueryableCollection persister = new SessionFactoryHelper(session.getFactory())
            .getCollectionPersister(persistentCollection.getRole());
    return persister.getSize(persistentCollection.getKey(), session);
}

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