protected override void GetChildItems(string path, bool recurse)
{
WriteVerbose(string.Format("XmlNavigationProvider::GetChildItems(Path = '{0}', recurse = '{1}')",
path, recurse));
string xpath = XmlProviderUtils.NormalizePath(path);
// Don't need to remove the drive from the path since container provider infrastructure does that
// for me automatically
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
XmlDocument xml = drive.XmlDocument;
XmlNodeList nodes = xml.SelectNodes(xpath, drive.NamespaceManager);
// ------------------------------
// NOTE: We could create an ErrorRecord and call WriteError() if SelectNodes() returns null.
// In this case I decided not to because the fact that get-item returns
// nothing indicates that case. For other operations such as clear-item or set-item
// it is a good idea to throw that exception to indicate specifically why you're unable to
// perform the action.
// ------------------------------
foreach (XmlNode node in nodes)
{
foreach (XmlNode innerNode in node.ChildNodes)
{
WriteItemObject(innerNode, path, IsNodeContainer(innerNode));
}
}
}
/// <summary>
/// get-item cmdlet callback
/// </summary>
/// <param name="path"></param>
protected override void GetItem(string path)
{
WriteVerbose(string.Format("XmlItemProvider::GetItem(Path = '{0}')", path));
string npath = XmlProviderUtils.NormalizePath(path);
string xpath = XmlProviderUtils.PathNoDrive(npath);
XmlDriveInfo drive = XmlProviderUtils.GetDriveFromPath(path, base.ProviderInfo);
if (drive == null)
{
ErrorRecord error = new ErrorRecord(new InvalidProgramException("Unable to retrieve the drive for this path"),
"drive", ErrorCategory.InvalidData, null);
WriteError(error);
}
XmlDocument xml = drive.XmlDocument;
XmlNodeList nodes = xml.SelectNodes(xpath, drive.NamespaceManager);
// ------------------------------
// NOTE: We could throw an ItemNotFoundException here if the nodelist returned is null
// or empty. In this case I decided not to because the fact that get-item returns
// nothing indicates that case. For other operations such as clear-item or set-item
// it is a good idea to throw that exception to indicate specifically why you're unable to
// perform the action.
// ------------------------------
foreach (XmlNode node in nodes)
{
WriteItemObject(node, path, false);
}
}
/// <summary>
/// callback for remove-psdrive
/// </summary>
/// <param name="drive"></param>
/// <returns></returns>
protected override PSDriveInfo RemoveDrive(PSDriveInfo drive)
{
WriteVerbose("XmlDriveProvider::RemoveDrive()");
XmlDriveInfo xmldrive = drive as XmlDriveInfo;
xmldrive.XmlDocument.Save(xmldrive.Path);
xmldrive.XmlDocument = null;
return(base.RemoveDrive(drive));
}
public XmlNode GetSingleXmlNodeFromPath(string path)
{
string npath = XmlProviderUtils.NormalizePath(path);
string xpath = XmlProviderUtils.PathNoDrive(npath);
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
if (drive == null)
{
ErrorRecord error = new ErrorRecord(new InvalidProgramException("Unable to retrieve the drive for this path"),
"drive", ErrorCategory.InvalidData, null);
ThrowTerminatingError(error);
}
XmlDocument xml = drive.XmlDocument;
return(xml.SelectSingleNode(xpath));
}
public XmlDocument GetXmlDocumentFromCurrentDrive()
{
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
if (drive == null)
{
ErrorRecord error = new ErrorRecord(new InvalidProgramException("Unable to retrieve the drive for this path"),
"drive", ErrorCategory.InvalidData, null);
WriteError(error);
return(null);
}
XmlDocument xml = drive.XmlDocument;
return(xml);
}
private XmlNodeList GetXmlNodesFromPath(string path)
{
string npath = XmlProviderUtils.NormalizePath(path);
string xpath = XmlProviderUtils.PathNoDrive(npath);
XmlDriveInfo drive = XmlProviderUtils.GetDriveFromPath(path, base.ProviderInfo);
if (drive == null)
{
ErrorRecord error = new ErrorRecord(new InvalidProgramException("Unable to retrieve the drive for this path"),
"drive", ErrorCategory.InvalidData, null);
WriteError(error);
return(null);
}
XmlDocument xml = drive.XmlDocument;
return(xml.SelectNodes(xpath));
}
protected override void RenameItem(string path, string newName)
{
WriteVerbose(string.Format("XmlNavigationProvider::RenameItem(Path = '{0}', newname = '{1}')", path, newName));
// create new node with new name and then copy childnodes and attributes over
// --------------------------------------------------------------------------
string xpath = XmlProviderUtils.NormalizePath(path);
XmlNodeList nodes = GetXmlNodesFromPath(xpath);
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
XmlDocument xmldoc = drive.XmlDocument;
foreach (XmlNode nd in nodes)
{
if (ShouldProcess(path))
{
XmlNode newNode = xmldoc.CreateNode(nd.NodeType, newName, nd.ParentNode.NamespaceURI);
nd.ParentNode.ReplaceChild(newNode, nd);
}
}
}
protected override bool ItemExists(string path)
{
WriteVerbose(string.Format("XmlNavigationProvider::ItemExists(Path = '{0}')", path));
string xpath = XmlProviderUtils.NormalizePath(path);
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
if (drive == null)
{
return(false);
}
XmlDocument xml = drive.XmlDocument;
if (xml.SelectSingleNode(xpath, drive.NamespaceManager) == null)
{
return(false);
}
else
{
return(true);
}
}
protected override void GetItem(string path)
{
WriteVerbose(string.Format("XmlNavigationProvider::GetItem(Path = '{0}')", path));
string xpath = XmlProviderUtils.NormalizePath(path);
// Don't need to remove the drive from the path since container provider infrastructure does that
// for me automatically
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
XmlDocument xml = drive.XmlDocument;
XmlNodeList nodes = xml.SelectNodes(xpath, drive.NamespaceManager);
// ------------------------------
// NOTE: We could throw an ItemNotFoundException here if the nodelist returned is null
// or empty. In this case I decided not to because the fact that get-item returns
// nothing indicates that case. For other operations such as clear-item or set-item
// it is a good idea to throw that exception to indicate specifically why you're unable to
// perform the action.
// ------------------------------
foreach (XmlNode node in nodes)
{
WriteItemObject(node, path, false);
}
}
/// <summary>
/// new-item cmdlet callback
/// </summary>
/// <param name="path"></param>
/// <param name="itemTypeName"></param>
/// <param name="newItemValue"></param>
protected override void NewItem(string path, string itemTypeName, object newItemValue)
{
WriteVerbose(string.Format("XmlContainerProvider::RemoveItemNewItem(Path = '{0}', itemtype = '{1}', newvalue = '{2}')",
path, itemTypeName, newItemValue));
// first check if item already exists at that path
// -----------------------------------------------
string xpath = XmlProviderUtils.NormalizePath(path);
// we need to get the parent of the new node so we can add to its children
// we do this by chooping the last item from the path
// for example: new item path = drive:/root/one/two
// the parent node would be at drive:/root/one
// --------------------------------------------
XmlNode parent = GetParentNodeFromLeaf(xpath);
string endName = GetLeafNameFromPath(xpath);
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
XmlDocument xmldoc = drive.XmlDocument;
XmlNode newNode = xmldoc.CreateNode(itemTypeName, endName, parent.NamespaceURI);
parent.AppendChild(newNode);
}
protected override void NewItem(string path, string itemTypeName, object newItemValue)
{
WriteVerbose(string.Format("XmlNavigationProvider::RemoveItemNewItem(Path = '{0}', itemtype = '{1}', newvalue = '{2}')",
path, itemTypeName, newItemValue));
// first check if item already exists at that path
// -----------------------------------------------
string xpath = XmlProviderUtils.NormalizePath(path);
// we need to get the parent of the new node so we can add to its children
// we do this by chopping the last item from the path if there isn't already an item
// at the path. in which case we need to check force flag or error out
// for example: new item path = drive:/root/one/two
// the parent node would be at drive:/root/one
// --------------------------------------------
XmlNode parent = null;
XmlNode destNode = GetSingleXmlNodeFromPath(xpath);
if (destNode != null)
{
parent = destNode.ParentNode;
if (base.Force)
{
destNode.ParentNode.RemoveChild(destNode);
}
else
{
// write error
ErrorRecord err = new ErrorRecord(new ArgumentException("item already exists!"), "AlreadyExists",
ErrorCategory.InvalidArgument, path);
WriteError(err);
return;
}
}
else
{
parent = GetParentNodeFromLeaf(xpath);
}
if (parent == null)
{
// write error
ErrorRecord err = new ErrorRecord(new ItemNotFoundException("ParentPath doesn't exist"), "ObjectNotFound",
ErrorCategory.ObjectNotFound, path);
WriteError(err);
return;
}
string endName = GetLastPathName(xpath);
XmlDriveInfo drive = base.PSDriveInfo as XmlDriveInfo;
XmlDocument xmldoc = drive.XmlDocument;
XmlNode newNode = xmldoc.CreateNode(itemTypeName, endName, parent.NamespaceURI);
// lets call shouldprocess
if (ShouldProcess(path))
{
parent.AppendChild(newNode);
}
}