/// <summary>
/// Instantiates a new database. Each data file that's part of the database must be included in the files parameter.
/// The order of the files is irrelevant.
/// </summary>
public Database(IEnumerable <string> files)
{
foreach (string file in files)
{
using (var fs = new FileStream(file, FileMode.Open, FileAccess.Read, FileShare.Read))
{
byte[] fileHeaderBytes = new byte[8192];
fs.Read(fileHeaderBytes, 0, 8192);
// This is kindy hackish as "this" isn't operational yet. As such, any calls to "this" will fail.
// We know however that, currently, FileHeaderPage doesn't use the reference. Should be changed
// later on.
var fileHeaderPage = new FileHeaderPage(fileHeaderBytes, this);
// Store reference to data file
Files.Add(fileHeaderPage.FileID, new DataFile(fileHeaderPage.FileID, file));
}
}
// Instantiate buffer manager
bufferManager = new BufferManager(this);
// Read boot page properties
var bootPage = GetBootPage();
Name = bootPage.DatabaseName;
ID = bootPage.DBID;
// Parse vital base tables
BaseTables = new BaseTableData(this);
// Startup dmv generator
Dmvs = new DmvGenerator(this);
}
private void InitDatabaseStream(Stream fs, string file = "")
{
var fileHeaderBytes = new byte[8192];
fs.Read(fileHeaderBytes, 0, 8192);
// This is kindy hackish as "this" isn't operational yet. As such, any calls to "this" will fail.
// We know however that, currently, FileHeaderPage doesn't use the reference. Should be changed
// later on.
var fileHeaderPage = new FileHeaderPage(fileHeaderBytes, this);
if (BindingID == Guid.Empty)
{
BindingID = fileHeaderPage.BindingID;
}
if (BindingID != fileHeaderPage.BindingID)
{
throw new BindingIDMismatchException(file, BindingID, fileHeaderPage.BindingID);
}
fs.Seek(fs.Position - 8192, SeekOrigin.Begin);
Files.Add(fileHeaderPage.FileID, fs);
}
