// Merges the tree of Elements whose root is <code>childElement</code>
// underneath the <code>parentElement</code>.
//
// If the <code>parentElement</code> already has an element that matches
// the <code>childElement</code>, then recursively attaches the
// grandchildren instead.
//
// The element returned will be either the supplied
// <code>childElement</code>, or an existing child element if one already
// existed under <code>parentElement</code>.
private static XElement MergeTree(XElement parentElement, XElement childElement)
{
var childElementOid = NofMetaModel.GetAttribute(childElement, "oid");
if (childElementOid != null)
{
// before we add the child element, check to see if it is already
// there
var existingChildElements = ElementsUnder(parentElement, childElement.Name.LocalName);
foreach (var possibleMatchingElement in existingChildElements)
{
var possibleMatchOid = NofMetaModel.GetAttribute(possibleMatchingElement, "oid");
if (possibleMatchOid == null || !possibleMatchOid.Equals(childElementOid))
{
continue;
}
// match: transfer the children of the child (grandchildren) to the
// already existing matching child
var existingChildElement = possibleMatchingElement;
var grandchildrenElements = ElementsUnder(childElement, "*");
foreach (var grandchildElement in grandchildrenElements)
{
grandchildElement.Remove();
MergeTree(existingChildElement, grandchildElement);
}
return(existingChildElement);
}
}
parentElement.Add(childElement);
return(childElement);
}
// Merges the tree of Elements whose root is <code>childElement</code>
// underneath the <code>parentElement</code>.
//
// If the <code>parentElement</code> already has an element that matches
// the <code>childElement</code>, then recursively attaches the
// grandchildren instead.
//
// The element returned will be either the supplied
// <code>childElement</code>, or an existing child element if one already
// existed under <code>parentElement</code>.
private static XElement MergeTree(XElement parentElement, XElement childElement)
{
Log.Debug("mergeTree(" + DoLog("parent", parentElement) + AndLog("child", childElement));
string childElementOid = NofMetaModel.GetAttribute(childElement, "oid");
Log.Debug("mergeTree(El,El): " + DoLog("childOid", childElementOid));
if (childElementOid != null)
{
// before we add the child element, check to see if it is already
// there
Log.Debug("mergeTree(El,El): check if child already there");
IEnumerable <XElement> existingChildElements = ElementsUnder(parentElement, childElement.Name.LocalName);
foreach (XElement possibleMatchingElement in existingChildElements)
{
string possibleMatchOid = NofMetaModel.GetAttribute(possibleMatchingElement, "oid");
if (possibleMatchOid == null || !possibleMatchOid.Equals(childElementOid))
{
continue;
}
Log.Debug("mergeTree(El,El): child already there; merging grandchildren");
// match: transfer the children of the child (grandchildren) to the
// already existing matching child
XElement existingChildElement = possibleMatchingElement;
IEnumerable <XElement> grandchildrenElements = ElementsUnder(childElement, "*");
foreach (XElement grandchildElement in grandchildrenElements)
{
grandchildElement.Remove();
Log.Debug("mergeTree(El,El): merging " + DoLog("grandchild", grandchildElement));
MergeTree(existingChildElement, grandchildElement);
}
return(existingChildElement);
}
}
parentElement.Add(childElement);
return(childElement);
}