casacore::MemoryTable Class Reference

Class for a table held in memory. More...

#include <MemoryTable.h>

Inheritance diagram for casacore::MemoryTable:

Public Member Functions
	MemoryTable (SetupNewTable &, uInt nrrow, Bool initialize)
	Create the table in memory using the definitions in the SetupNewTable object.
virtual	~MemoryTable ()
	The destructor deletes all data.
virtual void	reopenRW ()
	Try to reopen the table (the underlying one) for read/write access.
virtual Bool	asBigEndian () const
	Is the table stored in big or little endian format? It returns the endian format of the machine.
virtual const StorageOption &	storageOption () const
	Get the storage option used for the table.
virtual Bool	isMultiUsed (Bool checkSubTable) const
	Is the table in use (i.e.
virtual const TableLock &	lockOptions () const
	Get the locking info.
virtual void	mergeLock (const TableLock &lockOptions)
	Merge the given lock info with the existing one.
virtual Bool	hasLock (FileLocker::LockType) const
	Has this process the read or write lock, thus can the table be read or written safely? It always returns True.
virtual Bool	lock (FileLocker::LockType, uInt nattempts)
	Locking the table is a no-op.
virtual void	unlock ()
	Unlocking the table is a no-op.
virtual void	flush (Bool fsync, Bool recursive)
	Flushing the table is a no-op.
virtual void	resync ()
	Resyncing the Table is a no-op.
virtual uInt	getModifyCounter () const
	Get the modify counter.
virtual Bool	isWritable () const
	Test if the table is opened as writable.
virtual void	copy (const String &newName, int tableOption) const
	Copy the table and all its subtables.
virtual void	deepCopy (const String &newName, const Record &dataManagerInfo, const StorageOption &, int tableOption, Bool, int endianFormat, Bool noRows) const
virtual void	rename (const String &newName, int tableOption)
	Rename the table.
virtual int	tableType () const
	Get the table type (Table::Memory).
virtual TableDesc	actualTableDesc () const
	Get the actual table description.
virtual Record	dataManagerInfo () const
	Get the data manager info.
virtual TableRecord &	keywordSet ()
	Get readonly access to the table keyword set.
virtual TableRecord &	rwKeywordSet ()
	Get read/write access to the table keyword set.
virtual void	flushTableInfo ()
	Write the TableInfo object.
virtual BaseColumn *	getColumn (uInt columnIndex) const
	Get a column object using its index.
virtual BaseColumn *	getColumn (const String &columnName) const
	Get a column object using its name.
virtual Bool	canAddRow () const
	Test if it is possible to add a row to this table (yes).
virtual void	addRow (uInt nrrow=1, Bool initialize=True)
	Add one or more rows and possibly initialize them.
virtual Bool	canRemoveRow () const
	Test if it is possible to remove a row from this table (yes).
virtual void	removeRow (uInt rownr)
	Remove the given row.
virtual void	addColumn (const ColumnDesc &columnDesc, Bool addToParent)
	Add a column to the table.
virtual void	addColumn (const ColumnDesc &columnDesc, const String &dataManager, Bool byName, Bool addToParent)
virtual void	addColumn (const ColumnDesc &columnDesc, const DataManager &dataManager, Bool addToParent)
virtual void	addColumn (const TableDesc &tableDesc, const DataManager &dataManager, Bool addToParent)
virtual Bool	canRemoveColumn (const Vector< String > &columnNames) const
	Test if columns can be removed (yes).
virtual void	removeColumn (const Vector< String > &columnNames)
	Remove columns.
virtual Bool	canRenameColumn (const String &columnName) const
	Test if a column can be renamed (yes).
virtual void	renameColumn (const String &newName, const String &oldName)
	Rename a column.
virtual void	renameHypercolumn (const String &newName, const String &oldName)
	Rename a hypercolumn.
virtual DataManager *	findDataManager (const String &name, Bool byColumn) const
	Find the data manager with the given name or for the given column.
Private Member Functions
	MemoryTable (const MemoryTable &)
	Copy constructor is forbidden, because copying a table requires some more knowledge (like table name of result).
MemoryTable &	operator= (const MemoryTable &)
	Assignment is forbidden, because copying a table requires some more knowledge (like table name of result).
void	setup (BaseTable *btp)
	Setup the main parts of the object.
Private Attributes
ColumnSet *	colSetPtr_p
TableLockData *	lockPtr_p

Detailed Description

Class for a table held in memory.

Intended use:

Internal

Review Status

Reviewed By:: UNKNOWN
Date Reviewed:: before2004/08/25

Prerequisite

BaseTable

Synopsis

MemoryTable holds all its data in memory. It means that the data is not persistent. However, it can be copied to another table to make the data persistent. Furthermore it is a table as all other tables, so all table functions can be applied to it. Some functions (e.g. lock) won't do anything. Also all table operations like sorting, selecting, and iterating can be used.

The constructor accepts a SetupNewTable object which can contain bindings of columns to any data manager. All bindings to storage managers will be replaced by a binding to the memory based storage manager MemoryStMan . Also all unbound columns will be bound to MemoryStMan. Thus it is still possible that a column is bound to a virtual column engine like CompressComplex .

Definition at line 82 of file MemoryTable.h.

Constructor & Destructor Documentation

casacore::MemoryTable::MemoryTable	(	SetupNewTable &	,
		uInt	nrrow,
		Bool	initialize
	)

Create the table in memory using the definitions in the SetupNewTable object.

virtual casacore::MemoryTable::~MemoryTable ( ) [virtual]

The destructor deletes all data.

casacore::MemoryTable::MemoryTable ( const MemoryTable & ) [private]

Copy constructor is forbidden, because copying a table requires some more knowledge (like table name of result).

Declaring it private, makes it unusable.

Member Function Documentation

virtual TableDesc casacore::MemoryTable::actualTableDesc ( ) const [virtual]

Get the actual table description.

virtual void casacore::MemoryTable::addColumn	(	const TableDesc &	tableDesc,
		const DataManager &	dataManager,
		Bool	addToParent
	)			`[virtual]`

virtual void casacore::MemoryTable::addColumn	(	const ColumnDesc &	columnDesc,
		const DataManager &	dataManager,
		Bool	addToParent
	)			`[virtual]`

virtual void casacore::MemoryTable::addRow	(	uInt	nrrow = `1`,
		Bool	initialize = `True`
	)			`[virtual]`

virtual void casacore::MemoryTable::copy	(	const String &	newName,
		int	tableOption
	)			const `[virtual]`

virtual void casacore::MemoryTable::deepCopy	(	const String &	newName,
		const Record &	dataManagerInfo,
		const StorageOption &	,
		int	tableOption,
		Bool	,
		int	endianFormat,
		Bool	noRows
	)			const `[virtual]`

virtual DataManager* casacore::MemoryTable::findDataManager	(	const String &	name,
		Bool	byColumn
	)			const `[virtual]`

virtual void casacore::MemoryTable::flush	(	Bool	fsync,
		Bool	recursive
	)			`[virtual]`

virtual Bool casacore::MemoryTable::lock	(	FileLocker::LockType	,
		uInt	nattempts
	)			`[virtual]`

virtual void casacore::MemoryTable::rename	(	const String &	newName,
		int	tableOption
	)			`[virtual]`

casacore::MemoryTable Class Reference

Public Member Functions

Private Member Functions

Private Attributes