xslt file repository and methods for getting xslt files in FileService.

src/Umbraco.Core/Models/XsltFile.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Runtime.Serialization;
+
+namespace Umbraco.Core.Models
+{
+    /// <summary>
+    /// Represents a XSLT file
+    /// </summary>
+    [Serializable]
+    [DataContract(IsReference = true)]
+    public class XsltFile : File, IXsltFile
+    {
+        public XsltFile(string path)
+            : this(path, (Func<File, string>) null)
+        { }
+
+        internal XsltFile(string path, Func<File, string> getFileContent)
+            : base(path, getFileContent)
+        { }
+
+        /// <summary>
+        /// Indicates whether the current entity has an identity, which in this case is a path/name.
+        /// </summary>
+        /// <remarks>
+        /// Overrides the default Entity identity check.
+        /// </remarks>
+        public override bool HasIdentity
+        {
+            get { return string.IsNullOrEmpty(Path) == false; }
+        }
+    }
+}