/// <summary>
/// Get the elements of a path "path/to/node" or "path[to/node/@attribute>=20.50]".
/// <remarks>
/// <para>See XPath docs for help on using [number][key=value]
/// - syntax (http://www.w3.org/TR/xpath/)</para>
/// </remarks>
/// </summary>
/// <param name="source"></param>
/// <param name="path"></param>
/// <param name="create">create path if it doesn't exist?</param>
/// <exception cref="ArgumentOutOfRangeException" />
public static IEnumerable<XElement> Enumerable(XElement source, XPathString path, bool create)
{
IEnumerable<XElement> enumerableXElement;
if (null == path)
throw new ArgumentNullException("Path cannot be null.");
if (!path.IsRelative)
source = source.Root();
List<XElement> list = new[] { source }.ToList();
for (int i = 0; i < path.PathSegments.Length; i++)
{
List<XElement> newList = new List<XElement>();
XPathString xpathString = path.PathSegments[i];
//bool last = (i + 1) == path.PathSegments.Length;
if (xpathString.IsXPath)
{
bool foundOne = false;
list.ForEach(xElement =>
{
enumerableXElement = ParseInternal(xElement, xpathString);
if (null != enumerableXElement)
{
newList.AddRange(enumerableXElement.ToList());
foundOne = true;
}
});
if (foundOne)
{
list = newList;
continue;
}
}
list.ForEach(xElement => newList.AddRange(PartToElements(xElement, xpathString)));
list = newList;
}
// If the node wasn't found and we were asked to create it, do the best we can
// If it is a simple search, then we won't be able to place the node and it will be dangling (without a parent node)
if (list.Count == 0 && create)
{
// Find parent element if we can, and plug in the new node there
XElement parent = null;
foreach (var seg in path.PathSegments.Take(path.PathSegments.Length - 1))
parent = (parent ?? source).XPathElement(seg, create);
// If not found, try finding a sibling without search parameters
// and use it's parent.
if (null == parent)
{
XPathString clean = path.Clone_NoBrackets();
XElement sibling = source.XPathElement(clean, false);
if (null != sibling)
parent = sibling.Parent;
}
// Using last segment in XPath, create the node that is missing
var segment = path.PathSegments.Last();
XElement node = new XElement(segment.Name);
if (null != parent)
parent.Add(node);
// Add any child element's or attribute's that were requested in the search
foreach (var b in segment.Brackets)
{
foreach (var part in b.Parts)
{
if (!part.Equal) continue;
if (part.IsValueAttribute)
node.Add(new XAttribute(part.Key, part.Value));
else
node.Add(new XElement(part.Key, part.Value));
}
}
list.Add(node);
}
return list;
}
public void XPathString_Clone_NoBrackets()
{
XPathString xpath = new XPathString("//Site[Id={0}]/add[@key={1}]", "C", "landingName2");
XPathString actual = xpath.Clone_NoBrackets();
XPathString expected = new XPathString("//Site/add");
Assert.AreEqual(actual.Text, expected.Text);
Assert.AreEqual(actual.IsRelative, expected.IsRelative);
Assert.AreEqual(actual.IsElements, expected.IsElements);
}
