Examples of oracle.toplink.essentials.descriptors.ClassDescriptor.usesOptimisticLocking()

Package oracle.toplink.essentials.descriptors

Class oracle.toplink.essentials.descriptors.ClassDescriptor

Examples of oracle.toplink.essentials.descriptors.ClassDescriptor.usesOptimisticLocking()

oracle.toplink.essentials.descriptors.ClassDescriptor.usesOptimisticLocking()
PUBLIC: Return true if the receiver uses write (optimistic) locking.

     * Return whether the reference objects must be deleted
     * one by one, as opposed to with a single DELETE statement.
     */
    protected boolean mustDeleteReferenceObjectsOneByOne() {
        ClassDescriptor referenceDescriptor = this.getReferenceDescriptor();
        return referenceDescriptor.hasDependencyOnParts() || referenceDescriptor.usesOptimisticLocking() || (referenceDescriptor.hasInheritance() && referenceDescriptor.getInheritancePolicy().shouldReadSubclasses()) || referenceDescriptor.hasMultipleTables();
    }


    /**
     * INTERNAL:
     * Insert the referenced objects.

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        descriptor.getObjectBuilder().mergeIntoObject(clone, false, original, this);


        //update the change policies with the refresh
        descriptor.getObjectChangePolicy().revertChanges(clone, descriptor, (UnitOfWorkImpl)this.getSession(), ((UnitOfWorkImpl)this.getSession()).getCloneMapping());
        Vector primaryKey = getSession().keyFromObject(clone);
        if (descriptor.usesOptimisticLocking()) {
            descriptor.getOptimisticLockingPolicy().mergeIntoParentCache((UnitOfWorkImpl)getSession(), primaryKey, clone);
        }


        CacheKey parentCacheKey = ((UnitOfWorkImpl)getSession()).getParent().getIdentityMapAccessorInstance().getCacheKeyForObject(primaryKey, clone.getClass(), descriptor);
        CacheKey uowCacheKey = getSession().getIdentityMapAccessorInstance().getCacheKeyForObject(primaryKey, clone.getClass(), descriptor);

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            // Must ensure the get and put of the cache occur as a single operation.
            // Cache key hold a reference to a concurrency manager which is used for the lock/release operation
            CacheKey cacheKey = unitOfWork.getParent().getIdentityMapAccessorInstance().acquireLock(primaryKey, original.getClass(), descriptor);
            try {
                if (descriptor.usesOptimisticLocking()) {
                    if (descriptor.getOptimisticLockingPolicy().isChildWriteLockValueGreater(unitOfWork, primaryKey, original.getClass())) {
                        cacheKey.setWriteLockValue(unitOfWork.getIdentityMapAccessor().getWriteLockValue(original));
                    }
                }

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     */
    public boolean usesOptimisticLocking() {
        Iterator descriptors = getDescriptors().values().iterator();
        while (descriptors.hasNext()) {
            ClassDescriptor descriptor = (ClassDescriptor)descriptors.next();
            if (descriptor.usesOptimisticLocking()) {
                return true;
            }
        }
        return false;
    }

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