/// <summary>
/// Create a PartitionedTable metadata file from a list of partitions.
/// </summary>
/// <param name="metadataFile">Pathname for file containing the metadata.</param>
/// <returns>The URI to use to read this metadata file.</returns>
public string CreateMetadataFile(UNCPathname metadataFile)
{
// compute the prefix of the first partition
string prefix = partitions.First().Prefix;
Utilities.EnsureDirectoryExistsForFile(metadataFile.ToString());
StreamWriter sw = new StreamWriter(metadataFile.ToString());
sw.WriteLine(prefix);
sw.WriteLine(this.partitions.Count);
foreach (var p in this.partitions)
{
sw.WriteLine(p.ToShortString());
}
sw.Close();
return(Uri.UriSchemeFile + @"://" + metadataFile);
}
/// <summary>
/// Read the metadata from a partitioned file.
/// </summary>
/// <param name="metadataFile">Metadata file to read.</param>
public PartitionedFileMetadata(UNCPathname metadataFile)
{
StreamReader sr = new StreamReader(metadataFile.ToString());
string defaultPrefix = sr.ReadLine();
string str = sr.ReadLine();
if (string.IsNullOrEmpty(str))
{
throw new InvalidDataException("Expected a partitioned count, found none");
}
int partitionCount = int.Parse(str);
partitions = new List <Partition>(partitionCount);
for (int i = 0; i < partitionCount; i++)
{
this.Add(new Partition(sr.ReadLine(), defaultPrefix));
}
}
/// <summary>
/// Read the metadata from a partitioned file.
/// </summary>
/// <param name="metadataFile">Metadata file to read.</param>
public PartitionedFileMetadata(UNCPathname metadataFile)
{
StreamReader sr = new StreamReader(metadataFile.ToString());
string defaultPrefix = sr.ReadLine();
string str = sr.ReadLine();
if (string.IsNullOrEmpty(str))
throw new InvalidDataException("Expected a partitioned count, found none");
int partitionCount = int.Parse(str);
partitions = new List<Partition>(partitionCount);
for (int i = 0; i < partitionCount; i++)
this.Add(new Partition(sr.ReadLine(), defaultPrefix));
}
/// <summary>
/// Create a PartitionedTable metadata file from a list of partitions.
/// </summary>
/// <param name="metadataFile">Pathname for file containing the metadata.</param>
/// <returns>The URI to use to read this metadata file.</returns>
public string CreateMetadataFile(UNCPathname metadataFile)
{
// compute the prefix of the first partition
string prefix = partitions.First().Prefix;
Utilities.EnsureDirectoryExistsForFile(metadataFile.ToString());
StreamWriter sw = new StreamWriter(metadataFile.ToString());
sw.WriteLine(prefix);
sw.WriteLine(this.partitions.Count);
foreach (var p in this.partitions)
sw.WriteLine(p.ToShortString());
sw.Close();
return Uri.UriSchemeFile + @"://" + metadataFile;
}