-using System;
+#region
+/* -----------------------------------------------------------------------
+ * <copyright file="FileInfoExtensions.cs" company="GRNet">
+ *
+ * Copyright 2011-2012 GRNET S.A. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
+ * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and
+ * documentation are those of the authors and should not be
+ * interpreted as representing official policies, either expressed
+ * or implied, of GRNET S.A.
+ * </copyright>
+ * -----------------------------------------------------------------------
+ */
+#endregion
+using System;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
using System.Linq;
public static string GetProperDirectoryCapitalization(string fileName)
{
- if (String.IsNullOrWhiteSpace(fileName))
- throw new ArgumentNullException("fileName");
- if (!Path.IsPathRooted(fileName))
- throw new ArgumentException("fileName must be an absolute path", "fileName");
+ Contract.Ensures(!String.IsNullOrWhiteSpace(Contract.Result<string>()));
Contract.EndContractBlock();
+
+ if (String.IsNullOrWhiteSpace(fileName))
+ return String.Empty;
var dirInfo = new DirectoryInfo(fileName);
return dirInfo.GetProperCapitalization();
}
+
public static string GetProperCapitalization(this DirectoryInfo dirInfo)
{
if (dirInfo == null)
throw new ArgumentNullException("dirInfo");
Contract.EndContractBlock();
+ Contract.Assume(!String.IsNullOrWhiteSpace(dirInfo.FullName));
var parentDirInfo = dirInfo.Parent;
if (null == parentDirInfo)
return dirInfo.Name;
- return Path.Combine(GetProperDirectoryCapitalization(parentDirInfo.FullName),
- parentDirInfo.GetDirectories(dirInfo.Name)[0].Name);
+
+ try
+ {
+
+
+ if (dirInfo.Exists)
+ return Path.Combine(GetProperDirectoryCapitalization(parentDirInfo.FullName),
+ parentDirInfo.GetDirectories(dirInfo.Name)[0].Name);
+ else
+ {
+ return dirInfo.FullName;
+ }
+ }
+ catch (DirectoryNotFoundException)
+ {
+ //An exception can occur if a directory is deleted right after the Exists call
+ return dirInfo.FullName;
+ }
}
public static string GetProperFilePathCapitalization(string fileName)
{
- if (String.IsNullOrWhiteSpace(fileName))
- throw new ArgumentNullException("fileName");
- if (!Path.IsPathRooted(fileName))
- throw new ArgumentException("fileName must be an absolute path", "fileName");
+ Contract.Ensures(!String.IsNullOrWhiteSpace(Contract.Result<string>()));
Contract.EndContractBlock();
+ if (String.IsNullOrWhiteSpace(fileName))
+ return String.Empty;
var fileInfo = new FileInfo(fileName);
//Directory will not be null for an absolute path
Contract.Assume(dirInfo != null);
- return Path.Combine(GetProperDirectoryCapitalization(dirInfo.FullName),
- dirInfo.GetFiles(fileInfo.Name)[0].Name);
+ try
+ {
+ //Exists returns a cached value that can be true even if a file was deleted since the
+ //FileInfo object was created.
+ fileInfo.Refresh();
+ if (fileInfo.Exists)
+ return Path.Combine(GetProperDirectoryCapitalization(dirInfo.FullName),
+ dirInfo.GetFiles(fileInfo.Name)[0].Name);
+ else
+ {
+ return fileInfo.FullName;
+ }
+ }
+ catch (FileNotFoundException)
+ {
+ //An exception can occur if a file is deleted right after the Exists call
+ return fileInfo.FullName;
+
+ }
}
public static string GetProperCapitalization(this FileSystemInfo info)
throw new NotSupportedException("Unexpected parameter type");
}
+
+ public static FileSystemInfo FromPath(string filePath)
+ {
+ if (String.IsNullOrWhiteSpace(filePath))
+ throw new ArgumentNullException("filePath");
+ Contract.EndContractBlock();
+
+ return Directory.Exists(filePath) ?
+ (FileSystemInfo) new DirectoryInfo(filePath)
+ : new FileInfo(filePath);
+ }
}
}