private XFormsInstance checkInstanceToUpdate(
PropertyContext propertyContext, XFormsModelSubmission.SubmissionParameters p) {
XFormsInstance updatedInstance;
final NodeInfo destinationNodeInfo =
submission.evaluateTargetRef(
propertyContext,
p.xpathContext,
submission.findReplaceInstanceNoTargetref(p.refInstance),
p.submissionElementContextItem);
if (destinationNodeInfo == null) {
// Throw target-error
// XForms 1.1: "If the processing of the targetref attribute fails,
// then submission processing ends after dispatching the event
// xforms-submit-error with an error-type of target-error."
throw new XFormsSubmissionException(
submission,
"targetref attribute doesn't point to an element for replace=\"instance\".",
"processing targetref attribute",
new XFormsSubmitErrorEvent(
propertyContext, submission, XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR, null));
}
updatedInstance = submission.getContainingDocument().getInstanceForNode(destinationNodeInfo);
if (updatedInstance == null
|| !updatedInstance.getInstanceRootElementInfo().isSameNodeInfo(destinationNodeInfo)) {
// Only support replacing the root element of an instance
// TODO: in the future, check on resolvedXXFormsReadonly to implement this restriction only
// when using a readonly instance
throw new XFormsSubmissionException(
submission,
"targetref attribute must point to an instance root element when using cached/shared instance replacement.",
"processing targetref attribute",
new XFormsSubmitErrorEvent(
propertyContext, submission, XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR, null));
}
if (XFormsServer.logger.isDebugEnabled())
submission
.getContainingDocument()
.logDebug(
"submission",
"using instance from application shared instance cache",
"instance",
updatedInstance.getEffectiveId());
return updatedInstance;
}
public void replace(
PropertyContext propertyContext,
ConnectionResult connectionResult,
XFormsModelSubmission.SubmissionParameters p,
XFormsModelSubmission.SecondPassParameters p2) {
// Set new instance document to replace the one submitted
final XFormsInstance replaceInstanceNoTargetref =
submission.findReplaceInstanceNoTargetref(p.refInstance);
if (replaceInstanceNoTargetref == null) {
// Replacement instance or node was specified but not found
//
// Not sure what's the right thing to do with 1.1, but this could be done
// as part of the model's static analysis if the instance value is not
// obtained through AVT, and dynamically otherwise. However, in the dynamic
// case, I think that this should be a (currently non-specified by XForms)
// xforms-binding-error.
submission
.getXBLContainer(containingDocument)
.dispatchEvent(
propertyContext, new XFormsBindingExceptionEvent(containingDocument, submission));
} else {
final NodeInfo destinationNodeInfo =
submission.evaluateTargetRef(
propertyContext,
p.xpathContext,
replaceInstanceNoTargetref,
p.submissionElementContextItem);
if (destinationNodeInfo == null) {
// Throw target-error
// XForms 1.1: "If the processing of the targetref attribute fails,
// then submission processing ends after dispatching the event
// xforms-submit-error with an error-type of target-error."
throw new XFormsSubmissionException(
submission,
"targetref attribute doesn't point to an element for replace=\"instance\".",
"processing targetref attribute",
new XFormsSubmitErrorEvent(
containingDocument,
propertyContext,
submission,
XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
connectionResult));
}
// This is the instance which is effectively going to be updated
final XFormsInstance updatedInstance =
containingDocument.getInstanceForNode(destinationNodeInfo);
if (updatedInstance == null) {
throw new XFormsSubmissionException(
submission,
"targetref attribute doesn't point to an element in an existing instance for replace=\"instance\".",
"processing targetref attribute",
new XFormsSubmitErrorEvent(
containingDocument,
propertyContext,
submission,
XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
connectionResult));
}
// Whether the destination node is the root element of an instance
final boolean isDestinationRootElement =
updatedInstance.getInstanceRootElementInfo().isSameNodeInfo(destinationNodeInfo);
if (p2.isReadonly && !isDestinationRootElement) {
// Only support replacing the root element of an instance when using a shared instance
throw new XFormsSubmissionException(
submission,
"targetref attribute must point to instance root element when using read-only instance replacement.",
"processing targetref attribute",
new XFormsSubmitErrorEvent(
containingDocument,
propertyContext,
submission,
XFormsSubmitErrorEvent.ErrorType.TARGET_ERROR,
connectionResult));
}
final IndentedLogger detailsLogger = getDetailsLogger(p, p2);
// Obtain root element to insert
final NodeInfo newDocumentRootElement;
final XFormsInstance newInstance;
{
// Create resulting instance whether entire instance is replaced or not, because this:
// 1. Wraps a Document within a DocumentInfo if needed
// 2. Performs text nodes adjustments if needed
if (!p2.isReadonly) {
// Resulting instance must not be read-only
if (detailsLogger.isDebugEnabled())
detailsLogger.logDebug(
"",
"replacing instance with mutable instance",
"instance",
updatedInstance.getEffectiveId());
newInstance =
new XFormsInstance(
updatedInstance.getEffectiveModelId(),
updatedInstance.getId(),
(Document) resultingDocument,
connectionResult.resourceURI,
resultingRequestBodyHash,
p2.username,
p2.password,
p2.isCache,
p2.timeToLive,
updatedInstance.getValidation(),
p2.isHandleXInclude,
XFormsProperties.isExposeXPathTypes(containingDocument));
} else {
// Resulting instance must be read-only
if (detailsLogger.isDebugEnabled())
detailsLogger.logDebug(
"",
"replacing instance with read-only instance",
"instance",
updatedInstance.getEffectiveId());
newInstance =
new ReadonlyXFormsInstance(
updatedInstance.getEffectiveModelId(),
updatedInstance.getId(),
(DocumentInfo) resultingDocument,
connectionResult.resourceURI,
resultingRequestBodyHash,
p2.username,
p2.password,
p2.isCache,
p2.timeToLive,
updatedInstance.getValidation(),
p2.isHandleXInclude,
XFormsProperties.isExposeXPathTypes(containingDocument));
}
newDocumentRootElement = newInstance.getInstanceRootElementInfo();
}
// Perform insert/delete. This will dispatch xforms-insert/xforms-delete events.
// "the replacement is performed by an XForms action that performs some
// combination of node insertion and deletion operations that are
// performed by the insert action (10.3 The insert Element) and the
// delete action"
if (isDestinationRootElement) {
// Optimized insertion for instance root element replacement
// Handle new instance and associated event markings
final XFormsModel replaceModel = newInstance.getModel(containingDocument);
replaceModel.handleUpdatedInstance(propertyContext, newInstance, newDocumentRootElement);
// Dispatch xforms-delete event
// NOTE: Do NOT dispatch so we are compatible with the regular root element replacement
// (see below). In the future, we might want to dispatch this, especially if
// XFormsInsertAction dispatches xforms-delete when removing the root element
// updatedInstance.getXBLContainer(containingDocument).dispatchEvent(pipelineContext, new
// XFormsDeleteEvent(updatedInstance, Collections.singletonList(destinationNodeInfo), 1));
// Dispatch xforms-insert event
// NOTE: use the root node as insert location as it seems to make more sense than pointing
// to the earlier root element
newInstance
.getXBLContainer(containingDocument)
.dispatchEvent(
propertyContext,
new XFormsInsertEvent(
containingDocument,
newInstance,
Collections.singletonList((Item) newDocumentRootElement),
null,
newDocumentRootElement.getDocumentRoot(),
"after",
null,
null,
true));
} else {
// Generic insertion
final List<NodeInfo> destinationCollection = Collections.singletonList(destinationNodeInfo);
// Perform the insertion
// Insert before the target node, so that the position of the inserted node
// wrt its parent does not change after the target node is removed
final List insertedNode =
XFormsInsertAction.doInsert(
propertyContext,
containingDocument,
detailsLogger,
"before",
destinationCollection,
destinationNodeInfo.getParent(),
Collections.singletonList(newDocumentRootElement),
1,
false,
true);
if (!destinationNodeInfo
.getParent()
.isSameNodeInfo(destinationNodeInfo.getDocumentRoot())) {
// The node to replace is NOT a root element
// Perform the deletion of the selected node
XFormsDeleteAction.doDelete(
propertyContext, containingDocument, detailsLogger, destinationCollection, 1, true);
}
// Perform model instance update
// Handle new instance and associated event markings
// NOTE: The inserted node NodeWrapper.index might be out of date at this point because:
// * doInsert() dispatches an event which might itself change the instance
// * doDelete() does as well
// Does this mean that we should check that the node is still where it should be?
final XFormsModel updatedModel = updatedInstance.getModel(containingDocument);
updatedModel.handleUpdatedInstance(
propertyContext, updatedInstance, (NodeInfo) insertedNode.get(0));
}
// Dispatch xforms-submit-done
dispatchSubmitDone(propertyContext, connectionResult);
}
}