public static ContentIndexMap CreateInMemory()
{
var result = new ContentIndexMap {
stream = new MemoryStream()
};
result.LoadNewValues();
return(result);
}
public static ContentIndexMap NewTool(string indexName)
{
if (indexName == null)
{
throw new ArgumentNullException(nameof(indexName));
}
var result = new ContentIndexMap
{
// Try to open with read-write
stream = VirtualFileSystem.OpenStream(
VirtualFileSystem.ApplicationDatabasePath + '/' + indexName,
VirtualFileMode.OpenOrCreate,
VirtualFileAccess.ReadWrite,
VirtualFileShare.ReadWrite)
};
return(result);
}
public static ContentIndexMap Load(string indexFile, bool isReadOnly = false)
{
if (indexFile == null)
{
throw new ArgumentNullException(nameof(indexFile));
}
var result = new ContentIndexMap();
var isAppDataWriteable = !isReadOnly;
if (isAppDataWriteable)
{
try
{
// Try to open with read-write
result.stream = VirtualFileSystem.OpenStream(
indexFile,
VirtualFileMode.OpenOrCreate,
VirtualFileAccess.ReadWrite,
VirtualFileShare.ReadWrite);
}
catch (UnauthorizedAccessException)
{
isAppDataWriteable = false;
}
}
if (!isAppDataWriteable)
{
// Try to open read-only
result.stream = VirtualFileSystem.OpenStream(
indexFile,
VirtualFileMode.Open,
VirtualFileAccess.Read);
}
result.LoadNewValues();
return(result);
}