internal static Index ReadIndexData(Database db, BinaryReader br)
{
const string FuncErrCode=ClassErrCode+".0001";
try
{
lock(db.TableBlocking)
{
Index ndx = new Index();
ndx.bUnique = br.ReadBoolean();
if(ndx.bUnique)
{
int nkeys = br.ReadInt32();
for(int k=0;k<nkeys;k++)
{
Variant v = Variant.ReadFromFieldDef(br);
ndx.ht[v.obj]=br.ReadInt64();
}
}
else
{
int nkeys = br.ReadInt32();
for(int k=0;k<nkeys;k++)
{
Variant v = Variant.ReadFromFieldDef(br);
ndx.ht[v.obj] = new ArrayList();
int values = br.ReadInt32();
for(int vl=0;vl<values;vl++)
{
long rowid=br.ReadInt64();
(ndx.ht[v.obj] as ArrayList).Add(rowid);
}
}
}
return ndx;
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}
/// <summary>
/// [R1 is deprecated use R2] Reads or regenerates an index for a field in a table
/// </summary>
/// <param name="TableName"></param>
/// <param name="f"></param>
/// <param name="bForceRegen"></param>
/// <value></value>
Index GetIndex(string TableName, Field f, bool bForceRegen)
{
const string FuncErrCode=ClassErrCode+".0015";
try
{
lock(this.TableBlocking)
{
if(!this.TableBlocking.Contains(TableName))
this.TableBlocking[TableName] = new SortedList();// index cache
}
lock(this.TableBlocking[TableName])
{
if((this.TableBlocking[TableName] as SortedList)[f.seq]!=null)
return (this.TableBlocking[TableName] as SortedList)[f.seq] as Index;
bool bRegen=true;
if(!bForceRegen)
{
string indexname = TableName+".hi"+f.seq.ToString();
if(IndexFileExists(indexname))
{
FileStream fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+indexname,FileMode.Open,FileAccess.ReadWrite,FileShare.None);
BinaryReader br = new BinaryReader(fs);
bool flag = br.ReadBoolean();
if(flag)
{
bRegen=true;
}
else
{
bRegen=false;
// SoapFormatter formatter = new SoapFormatter();
// Index ndx = (Index)formatter.Deserialize(fs);
Index ndx = Index.ReadIndexData(this,new BinaryReader(fs));
(this.TableBlocking[TableName] as SortedList)[f.seq]=ndx;
}
fs.Close();
}
}
if(bRegen)
{// unique key
if(!f.bIndexed) throw new Exception("Not indexed field");
if(f.bUnique)
{
Index ndx = new Index();
ndx.bUnique=true;
CheckTable_FixContent(TableName,f); // por si las moscas
FileStream fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+TableName+".hc"+f.seq.ToString(),FileMode.Open,FileAccess.Read,FileShare.None);
BinaryReader br = new BinaryReader(fs);
bool flag = br.ReadBoolean();
if(flag)
{
throw new Exception("Database corruption");
}
else
{
HFI hfi = HFI.Read(TableName,DatabaseFilePath);
for(long n=0;n<hfi.rowseq;n++)
{
object o = f.ReadData(this,br);
ndx.ht[o]=n;
}
(this.TableBlocking[TableName] as SortedList)[f.seq]=ndx;
}
br.Close();
}
else
{// not unique key
Index ndx = new Index();
ndx.bUnique=false;
CheckTable_FixContent(TableName,f); // por si las moscas
FileStream fs = FileStream2.NewFileStream(System.IO.Path.GetDirectoryName(DatabaseFilePath)+"\\"+TableName+".hc"+f.seq.ToString(),FileMode.Open,FileAccess.Read,FileShare.None);
BinaryReader br = new BinaryReader(fs);
bool flag = br.ReadBoolean();
if(flag)
{
throw new Exception("Database corruption");
}
else
{
HFI hfi = HFI.Read(TableName,DatabaseFilePath);
for(long n=0;n<hfi.rowseq;n++)
{
object o = f.ReadData(this,br);
if(ndx.ht[o]==null)
ndx.ht[o]=new ArrayList();
(ndx.ht[o] as ArrayList).Add(n);
}
(this.TableBlocking[TableName] as SortedList)[f.seq]=ndx;
}
br.Close();
}
}
return (this.TableBlocking[TableName] as SortedList)[f.seq] as Index;
}
}
catch(Exception ex)
{
throw new Exception(ex.Message+"\n"+FuncErrCode+": Inner exception.");
}
}