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//
// System.Web.UI.XPathBinder
//
// Authors:
// Ben Maurer (bmaurer@users.sourceforge.net)
//
// (C) 2003 Ben Maurer
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Collections;
using System.Collections.Specialized;
using System.Text;
using System.Xml.XPath;
using System.Xml;
namespace System.Web.UI
{
public sealed class XPathBinder
{
XPathBinder ()
{
}
public static object Eval (object container, string xPath)
{
return Eval (container, xPath, (IXmlNamespaceResolver)null);
}
public static object Eval (object container, string xPath, IXmlNamespaceResolver resolver)
{
if (xPath == null || xPath.Length == 0)
throw new ArgumentNullException ("xPath");
IXPathNavigable factory = container as IXPathNavigable;
if (factory == null)
throw new ArgumentException ("container");
object result = factory.CreateNavigator ().Evaluate (xPath, resolver);
XPathNodeIterator itr = result as XPathNodeIterator;
if (itr != null) {
if (itr.MoveNext ())
return itr.Current.Value;
else
return null;
}
return result;
}
public static string Eval (object container, string xPath, string format)
{
return Eval (container, xPath, format, null);
}
public static string Eval (object container, string xPath, string format, IXmlNamespaceResolver resolver)
{
object result = Eval (container, xPath, resolver);
if (result == null)
return String.Empty;
if (format == null || format.Length == 0)
return result.ToString ();
return String.Format (format, result);
}
public static IEnumerable Select (object container, string xPath)
{
return Select (container, xPath, null);
}
public static IEnumerable Select (object container, string xPath, IXmlNamespaceResolver resolver)
{
if (xPath == null || xPath.Length == 0)
throw new ArgumentNullException ("xPath");
IXPathNavigable factory = container as IXPathNavigable;
if (factory == null)
throw new ArgumentException ("container");
XPathNodeIterator itr = factory.CreateNavigator ().Select (xPath, resolver);
ArrayList ret = new ArrayList ();
while (itr.MoveNext ()) {
IHasXmlNode nodeAccessor = itr.Current as IHasXmlNode;
if (nodeAccessor == null)
throw new InvalidOperationException ();
ret.Add (nodeAccessor.GetNode ());
}
return ret;
}
}
}
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