Item::Ptr UTransform::TransformResult::next(DynamicContext *context)
{
context->testInterrupt();
AutoVariableStoreReset reset(context, &scope_);
if(toDo_) {
toDo_ = false;
NodeSet copiedNodes = NodeSet(nodecompare(context));
VectorOfCopyBinding::const_iterator end = transform_->getBindings()->end();
for(VectorOfCopyBinding::const_iterator it = transform_->getBindings()->begin();
it != end; ++it) {
if((*it)->qname_ == 0) continue;
Sequence values = (*it)->expr_->createResult(context)->toSequence(context);
// Keep a record of the nodes that have been copied
Result valIt = values;
Item::Ptr val;
while((val = valIt->next(context)).notNull()) {
copiedNodes.insert((Node*)val.get());
}
scope_.setVar((*it)->uri_, (*it)->name_, values);
}
// Get the pending update list
PendingUpdateList pul = transform_->getModifyExpr()->createUpdateList(context);
// Check that the targets of the pending updates are copied nodes
for(PendingUpdateList::const_iterator i = pul.begin(); i != pul.end(); ++i) {
Node::Ptr target = i->getTarget();
while(copiedNodes.find(target) == copiedNodes.end()) {
target = target->dmParent(context);
if(target.isNull()) {
XQThrow3(StaticErrorException,X("UTransform::staticTyping"),
X("The target node of an update expression in the transform expression is not a node from the copy clauses [err:XUDY0014]"), &(*i));
}
}
}
// Apply the updates
AutoDelete<UpdateFactory> ufactory(context->createUpdateFactory());
ufactory->applyUpdates(pul, context, transform_->getRevalidationMode());
// Execute the return expression
result_ = transform_->getReturnExpr()->createResult(context);
}
Item::Ptr result = result_->next(context);
if(result.isNull()) {
result_ = 0;
return 0;
}
return result;
}
PendingUpdateList URename::createUpdateList(DynamicContext *context) const
{
Node::Ptr node = (Node*)target_->createResult(context)->next(context).get();
if(node->dmNodeKind() != Node::element_string &&
node->dmNodeKind() != Node::attribute_string &&
node->dmNodeKind() != Node::processing_instruction_string)
XQThrow(XPath2TypeMatchException,X("URename::createUpdateList"),
X("It is a type error for the target expression of a rename expression not to be a single element, "
"attribute or processing instruction [err:XUTY0012]"));
ATQNameOrDerived::Ptr qname = (ATQNameOrDerived*)name_->createResult(context)->next(context).get();
// 3. The following checks are performed for error conditions:
// a. If $target is an element node, the "namespaces" property of $target must not include any namespace binding that conflicts
// with the implied namespace binding of $QName [err:XUDY0023].
if(node->dmNodeKind() == Node::element_string) {
ATAnyURIOrDerived::Ptr uri = FunctionNamespaceURIForPrefix::uriForPrefix(qname->getPrefix(), node, context, this);
if(uri.notNull() && !XPath2Utils::equals(uri->asString(context), qname->getURI())) {
XMLBuffer buf;
buf.append(X("Implied namespace binding for the rename expression (\""));
buf.append(qname->getPrefix());
buf.append(X("\" -> \""));
buf.append(qname->getURI());
buf.append(X("\") conflicts with those already existing on the target element [err:XUDY0023]"));
XQThrow3(DynamicErrorException, X("URename::createUpdateList"), buf.getRawBuffer(), this);
}
}
// b. If $target is an attribute node that has a parent, the "namespaces" property of parent($target) must not include any
// namespace binding that conflicts with the implied namespace binding of $QName [err:XUDY0023].
else if(node->dmNodeKind() == Node::attribute_string) {
Node::Ptr parentNode = node->dmParent(context);
if(parentNode.notNull() && qname->getURI() != 0 && *(qname->getURI()) != 0) {
ATAnyURIOrDerived::Ptr uri = FunctionNamespaceURIForPrefix::uriForPrefix(qname->getPrefix(), parentNode, context, this);
if(uri.notNull() && !XPath2Utils::equals(uri->asString(context), qname->getURI())) {
XMLBuffer buf;
buf.append(X("Implied namespace binding for the rename expression (\""));
buf.append(qname->getPrefix());
buf.append(X("\" -> \""));
buf.append(qname->getURI());
buf.append(X("\") conflicts with those already existing on the parent element of the target attribute [err:XUDY0023]"));
XQThrow3(DynamicErrorException, X("URename::createUpdateList"), buf.getRawBuffer(), this);
}
}
}
// c. If $target is processing instruction node, $QName must not include a non-empty namespace prefix. [err:XUDY0025].
else if(node->dmNodeKind() == Node::processing_instruction_string && !XPath2Utils::equals(qname->getPrefix(), XMLUni::fgZeroLenString))
XQThrow(XPath2TypeMatchException,X("URename::createUpdateList"),
X("The target of a rename expression is a processing instruction node, and the new name "
"expression returned a QName with a non-empty namespace prefix [err:XUDY0025]"));
return PendingUpdate(PendingUpdate::RENAME, node, qname, this);
}