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Public Member Functions | Static Public Member Functions | Private Member Functions | Private Attributes | List of all members
casacore::VirtualTaQLColumn Class Reference

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#include <VirtualTaQLColumn.h>

Public Member Functions

 VirtualTaQLColumn (const String &expr, const String &style=String())
 Construct it with the given TaQL expression. More...
 
 VirtualTaQLColumn (const Record &spec)
 Construct it with the given specification. More...
 
virtual ~VirtualTaQLColumn ()
 Destructor is mandatory. More...
 
virtual DataManagerclone () const
 Clone the engine object. More...
 
virtual Record dataManagerSpec () const
 Get the data manager specification. More...
 
virtual String dataManagerType () const
 Return the type name of the engine. More...
 
const Stringexpression () const
 Return the TaQL expression used. More...
 
virtual void setShapeColumn (const IPosition &aShape)
 Set the shape of an array in the column. More...
 
virtual void setMaxLength (uInt maxLength)
 Set the maximum length of a 'fixed length' string. More...
 
virtual int dataType () const
 Functions to return column info. More...
 
virtual Bool isWritable () const
 Test if data can be put into this column. More...
 
virtual uInt ndim (rownr_t rownr)
 Get the dimensionality of the item in the given row. More...
 
virtual IPosition shape (rownr_t rownr)
 Get the shape of the item in the given row. More...
 
virtual Bool isShapeDefined (rownr_t rownr)
 Is the value shape defined in the given row? By default it returns True. More...
 
- Public Member Functions inherited from casacore::VirtualColumnEngine
 VirtualColumnEngine ()
 Create the object. More...
 
virtual ~VirtualColumnEngine ()
 
- Public Member Functions inherited from casacore::DataManager
 DataManager ()
 Default constructor. More...
 
virtual ~DataManager ()
 
virtual String dataManagerName () const
 Return the name of the data manager. More...
 
void dataManagerInfo (Record &info) const
 Add SEQNR and SPEC (the DataManagerSpec subrecord) to the info. More...
 
virtual Record getProperties () const
 Get data manager properties that can be modified. More...
 
virtual void setProperties (const Record &spec)
 Modify data manager properties given in record fields. More...
 
virtual Bool canReallocateColumns () const
 Tell if the data manager wants to reallocate the data manager column objects. More...
 
virtual DataManagerColumnreallocateColumn (DataManagerColumn *column)
 Reallocate the column object if it is part of this data manager. More...
 
uInt sequenceNr () const
 Get the (unique) sequence nr of this data manager. More...
 
uInt ncolumn () const
 Get the nr of columns in this data manager (can be zero). More...
 
Bool asBigEndian () const
 Have the data to be stored in big or little endian canonical format? More...
 
const TSMOptiontsmOption () const
 Get the TSM option. More...
 
MultiFileBasemultiFile ()
 Get the MultiFile pointer (can be 0). More...
 
String keywordName (const String &keyword) const
 Compose a keyword name from the given keyword appended with the sequence number (e.g. More...
 
String fileName () const
 Compose a unique filename from the table name and sequence number. More...
 
ByteIO::OpenOption fileOption () const
 Get the AipsIO option of the underlying file. More...
 
virtual Bool isRegular () const
 Is this a regular storage manager? It is regular if it allows addition of rows and writing data in them. More...
 
Tabletable () const
 Get the table this object is associated with. More...
 
virtual void reopenRW ()
 Reopen the data manager for read/write access. More...
 
virtual Bool canAddColumn () const
 Does the data manager allow to add columns? (default no) More...
 
virtual Bool canRemoveColumn () const
 Does the data manager allow to delete columns? (default no) More...
 
virtual Bool canRenameColumn () const
 Does the data manager allow to rename columns? (default yes) More...
 
virtual void setMaximumCacheSize (uInt nMiB)
 Set the maximum cache size (in bytes) to be used by a storage manager. More...
 
virtual void showCacheStatistics (std::ostream &) const
 Show the data manager's IO statistics. More...
 
DataManagerColumncreateScalarColumn (const String &columnName, int dataType, const String &dataTypeId)
 Create a column in the data manager on behalf of a table column. More...
 
DataManagerColumncreateDirArrColumn (const String &columnName, int dataType, const String &dataTypeId)
 Create a direct array column. More...
 
DataManagerColumncreateIndArrColumn (const String &columnName, int dataType, const String &dataTypeId)
 Create an indirect array column. More...
 
DataManagergetClone () const
 Has the object already been cloned? More...
 
void setClone (DataManager *clone) const
 Set the pointer to the clone. More...
 
- Public Member Functions inherited from casacore::DataManagerColumn
 DataManagerColumn ()
 Create a column. More...
 
virtual ~DataManagerColumn ()
 Frees up the storage. More...
 
void setIsFixedShape (Bool isFixedShape)
 Set the isFixedShape flag. More...
 
Bool isFixedShape () const
 Is this a fixed shape column? More...
 
virtual String dataTypeId () const
 Get the data type id of the column for dataType==TpOther. More...
 
void setFixedShapeColumn (const IPosition &shape)
 Set the shape of all (fixed-shaped) arrays in the column. More...
 
virtual void setShape (rownr_t rownr, const IPosition &shape)
 Set the shape of an (variable-shaped) array in the given row. More...
 
virtual void setShapeTiled (rownr_t rownr, const IPosition &shape, const IPosition &tileShape)
 Set the shape and tile shape of an (variable-shaped) array in the given row. More...
 
virtual IPosition tileShape (rownr_t rownr)
 Get the tile shape of the item in the given row. More...
 
virtual Bool canChangeShape () const
 Can the data manager handle chaging the shape of an existing array? Default is no. More...
 
ColumnCachecolumnCache ()
 Get access to the ColumnCache object. More...
 
const ColumnCachecolumnCachePtr () const
 
void get (rownr_t rownr, Bool *dataPtr)
 Get the scalar value in the given row. More...
 
void get (rownr_t rownr, uChar *dataPtr)
 
void get (rownr_t rownr, Short *dataPtr)
 
void get (rownr_t rownr, uShort *dataPtr)
 
void get (rownr_t rownr, Int *dataPtr)
 
void get (rownr_t rownr, uInt *dataPtr)
 
void get (rownr_t rownr, Int64 *dataPtr)
 
void get (rownr_t rownr, float *dataPtr)
 
void get (rownr_t rownr, double *dataPtr)
 
void get (rownr_t rownr, Complex *dataPtr)
 
void get (rownr_t rownr, DComplex *dataPtr)
 
void get (rownr_t rownr, String *dataPtr)
 
void get (rownr_t rownr, void *dataPtr)
 This function is the get for all non-standard data types. More...
 
void put (rownr_t rownr, const Bool *dataPtr)
 Put the scalar value into the given row. More...
 
void put (rownr_t rownr, const uChar *dataPtr)
 
void put (rownr_t rownr, const Short *dataPtr)
 
void put (rownr_t rownr, const uShort *dataPtr)
 
void put (rownr_t rownr, const Int *dataPtr)
 
void put (rownr_t rownr, const uInt *dataPtr)
 
void put (rownr_t rownr, const Int64 *dataPtr)
 
void put (rownr_t rownr, const float *dataPtr)
 
void put (rownr_t rownr, const double *dataPtr)
 
void put (rownr_t rownr, const Complex *dataPtr)
 
void put (rownr_t rownr, const DComplex *dataPtr)
 
void put (rownr_t rownr, const String *dataPtr)
 
void put (rownr_t rownr, const void *dataPtr)
 This function is the put for all non-standard data types. More...
 
virtual void putScalarColumnV (const ArrayBase &dataPtr)
 Put all scalar values in the column. More...
 
virtual void putScalarColumnCellsV (const RefRows &rownrs, const ArrayBase &dataPtr)
 Put some scalar values in the column. More...
 
virtual void putArrayV (rownr_t rownr, const ArrayBase &data)
 Put the array value into the given row. More...
 
virtual void getArrayColumnV (ArrayBase &data)
 Get all array values in the column. More...
 
virtual void putArrayColumnV (const ArrayBase &data)
 Put all array values in the column. More...
 
virtual void getArrayColumnCellsV (const RefRows &rownrs, ArrayBase &data)
 Get some array values in the column. More...
 
virtual void putArrayColumnCellsV (const RefRows &rownrs, const ArrayBase &data)
 Put some array values in the column. More...
 
virtual void getSliceV (rownr_t rownr, const Slicer &slicer, ArrayBase &data)
 Get a section of the array in the given row. More...
 
virtual void putSliceV (rownr_t rownr, const Slicer &slicer, const ArrayBase &data)
 Put into a section of the array in the given row. More...
 
virtual void getColumnSliceV (const Slicer &slicer, ArrayBase &data)
 Get a section of all arrays in the column. More...
 
virtual void putColumnSliceV (const Slicer &slicer, const ArrayBase &data)
 Put into a section of all arrays in the column. More...
 
virtual void getColumnSliceCellsV (const RefRows &rownrs, const Slicer &slicer, ArrayBase &data)
 Get a section of some arrays in the column. More...
 
virtual void putColumnSliceCellsV (const RefRows &rownrs, const Slicer &slicer, const ArrayBase &data)
 Put into a section of some arrays in the column. More...
 
void throwGet () const
 Throw an "invalid operation" exception for the default implementation of get. More...
 
void throwPut () const
 Throw an "invalid operation" exception for the default implementation of put. More...
 
void setColumnName (const String &colName)
 Set the column name. More...
 
const StringcolumnName () const
 Get rhe column name. More...
 

Static Public Member Functions

static String className ()
 Return the name of the class. More...
 
static void registerClass ()
 Register the class name and the static makeObject "constructor". More...
 
static DataManagermakeObject (const String &dataManagerName, const Record &spec)
 Define the "constructor" to construct this engine when a table is read back. More...
 
- Static Public Member Functions inherited from casacore::DataManager
static void registerCtor (const String &type, DataManagerCtor func)
 Register a mapping of a data manager type to its static construction function. More...
 
static DataManagerCtor getCtor (const String &dataManagerType)
 Get the "constructor" of a data manager (thread-safe). More...
 
static Bool isRegistered (const String &dataManagerType)
 Test if a data manager is registered (thread-safe). More...
 
static DataManagerunknownDataManager (const String &dataManagerType, const Record &spec)
 Serve as default function for theirRegisterMap, which catches all unknown data manager types. More...
 

Private Member Functions

 VirtualTaQLColumn (const VirtualTaQLColumn &)
 Copy is not needed and therefore forbidden (so it is made private). More...
 
VirtualTaQLColumnoperator= (const VirtualTaQLColumn &)
 Assignment is not needed and therefore forbidden (so it is made private). More...
 
virtual DataManagerColumnmakeScalarColumn (const String &columnName, int dataType, const String &)
 Create the column object for the scalar column in this engine. More...
 
virtual DataManagerColumnmakeIndArrColumn (const String &columnName, int dataType, const String &dataTypeId)
 Create the column object for the indirect array column in this engine. More...
 
virtual void create64 (rownr_t)
 Let the engine initialize the object for a new table. More...
 
virtual void prepare ()
 Prepare compiles the expression. More...
 
virtual void getBool (rownr_t rownr, Bool *dataPtr)
 Get the scalar value in the given row. More...
 
virtual void getuChar (rownr_t rownr, uChar *dataPtr)
 
virtual void getShort (rownr_t rownr, Short *dataPtr)
 
virtual void getuShort (rownr_t rownr, uShort *dataPtr)
 
virtual void getInt (rownr_t rownr, Int *dataPtr)
 
virtual void getuInt (rownr_t rownr, uInt *dataPtr)
 
virtual void getInt64 (rownr_t rownr, Int64 *dataPtr)
 
virtual void getfloat (rownr_t rownr, float *dataPtr)
 
virtual void getdouble (rownr_t rownr, double *dataPtr)
 
virtual void getComplex (rownr_t rownr, Complex *dataPtr)
 
virtual void getDComplex (rownr_t rownr, DComplex *dataPtr)
 
virtual void getString (rownr_t rownr, String *dataPtr)
 
virtual void getArrayV (rownr_t rownr, ArrayBase &arr)
 Get the array value in the given row. More...
 
void getResult (rownr_t rownr)
 Get the array result into itsCurArray. More...
 
void makeCurArray ()
 Make the result cache. More...
 
virtual void getScalarColumnV (ArrayBase &arr)
 Get functions implemented by means of their DataManagerColumn::getXXBase counterparts, but optimized for constant expressions. More...
 
virtual void getScalarColumnCellsV (const RefRows &rownrs, ArrayBase &arr)
 Get some scalar values in the column. More...
 
void fillColumnCache ()
 Fill the ColumnCache object with a constant scalar value. More...
 
void fillArray (ArrayBase &data)
 Fill an array with a constant scalar value. More...
 

Private Attributes

int itsDataType
 
Bool itsIsArray
 
Bool itsIsConst
 
Bool itsTempWritable
 
String itsColumnName
 
String itsExpr
 
String itsStyle
 
TableExprNodeitsNode
 
IPosition itsShape
 
uInt itsMaxLen
 
union {
   Bool   itsBool
 
   uChar   itsuChar
 
   Short   itsShort
 
   uShort   itsuShort
 
   Int   itsInt
 
   uInt   itsuInt
 
   Int64   itsInt64
 
   Float   itsFloat
 
   Double   itsDouble
 
}; 
 
Complex itsComplex
 
DComplex itsDComplex
 
String itsString
 
ArrayBaseitsCurArray
 
rownr_t itsCurRow
 

Additional Inherited Members

- Static Public Attributes inherited from casacore::DataManager
static rownr_t MAXROWNR32
 Define the highest row number that can be represented as signed 32-bit. More...
 
- Protected Member Functions inherited from casacore::DataManager
void decrementNcolumn ()
 Decrement number of columns (in case a column is deleted). More...
 
void setEndian (Bool bigEndian)
 Tell the data manager if big or little endian format is needed. More...
 
void setTsmOption (const TSMOption &tsmOption)
 Tell the data manager which TSM option to use. More...
 
void setMultiFile (MultiFileBase *mfile)
 Tell the data manager that MultiFile can be used. More...
 
virtual Bool hasMultiFileSupport () const
 Does the data manager support use of MultiFile? A derived class has to return True if it can use the MultiFile. More...
 
void throwDataTypeOther (const String &columnName, int dataType) const
 Throw an exception in case data type is TpOther, because the storage managers (and maybe other data managers) do not support such columns. More...
 
- Protected Member Functions inherited from casacore::DataManagerColumn
virtual void getOther (rownr_t rownr, void *dataPtr)
 This function is the get for all non-standard data types. More...
 
virtual void putBool (rownr_t rownr, const Bool *dataPtr)
 Put the scalar value into the given row. More...
 
virtual void putuChar (rownr_t rownr, const uChar *dataPtr)
 
virtual void putShort (rownr_t rownr, const Short *dataPtr)
 
virtual void putuShort (rownr_t rownr, const uShort *dataPtr)
 
virtual void putInt (rownr_t rownr, const Int *dataPtr)
 
virtual void putuInt (rownr_t rownr, const uInt *dataPtr)
 
virtual void putInt64 (rownr_t rownr, const Int64 *dataPtr)
 
virtual void putfloat (rownr_t rownr, const float *dataPtr)
 
virtual void putdouble (rownr_t rownr, const double *dataPtr)
 
virtual void putComplex (rownr_t rownr, const Complex *dataPtr)
 
virtual void putDComplex (rownr_t rownr, const DComplex *dataPtr)
 
virtual void putString (rownr_t rownr, const String *dataPtr)
 
virtual void putOther (rownr_t rownr, const void *dataPtr)
 This function is the put for all non-standard data types. More...
 
void getScalarColumnBase (ArrayBase &dataPtr)
 The default implementations of get and put functions. More...
 
void putScalarColumnBase (const ArrayBase &dataPtr)
 
void getScalarColumnCellsBase (const RefRows &rownrs, ArrayBase &dataPtr)
 
void putScalarColumnCellsBase (const RefRows &rownrs, const ArrayBase &dataPtr)
 
void getArrayColumnBase (ArrayBase &data)
 
void putArrayColumnBase (const ArrayBase &data)
 
void getArrayColumnCellsBase (const RefRows &rownrs, ArrayBase &data)
 
void putArrayColumnCellsBase (const RefRows &rownrs, const ArrayBase &data)
 
void getSliceBase (rownr_t rownr, const Slicer &slicer, ArrayBase &data)
 
void putSliceBase (rownr_t rownr, const Slicer &slicer, const ArrayBase &data)
 
void getColumnSliceBase (const Slicer &slicer, ArrayBase &data)
 
void putColumnSliceBase (const Slicer &slicer, const ArrayBase &data)
 
void getColumnSliceCellsBase (const RefRows &rownrs, const Slicer &slicer, ArrayBase &data)
 
void putColumnSliceCellsBase (const RefRows &rownrs, const Slicer &slicer, const ArrayBase &data)
 

Detailed Description

Virtual scalar column using TaQL

Review Status

Reviewed By:
GvD
Date Reviewed:
2004/07/09

Prerequisite

Synopsis

VirtualTaQLColumn is a virtual column engine to define the contents of a column as a TaQL CALC expression in which possibly other columns are used. It is (of course) only possible to get data from the column; puts cannot be done. See note 199 for a description of TaQL. The TaQL style can be specified (such as 0- or 1-based indexing).
The expression result can be a scalar or array of the basic TaQL data types. The column data type has to be conformant with that TaQL type, thus a column of any integer type has to be used for an integer TaQL result.
Constant expressions are precalculated and cached making the retrieval of e.g. the full column much faster (factor 4).
A possible use for a virtual TaQL column is a column in a MeasurementSet containing a constant value. It could also be used for on-the-fly calculation of J2000 UVW-values or HADEC using an expression such as "derivedmscal.newuvw()"
Caution: One has to be careful with deleting columns; If in an existing table a TaQL expression uses a deleted column, the expression cannot be parsed anymore and the table cannot be opened anymore; In the future the Table System will be made more forgiving;

Example

The following example creates a table with a few columns. One column is virtual and has a random value if Col3 is true. Otherwise it has value 0.

// Create the table description.
TableDesc td;
td.addColumn (ScalarColumnDesc<DComplex>("Col1"));
td.addColumn (ScalarColumnDesc<Int>("Col2"));
td.addColumn (ScalarColumnDesc<Bool>("Col3"));
td.addColumn (ScalarColumnDesc<Double>("ColVirt"));
// Now create a new table from the description.
SetupNewTable newTab("tmtest", td, Table::New);
// Define the expression of the virtual column and bind the column to it.
// The other columns are by default bound to StandardStMan.
VirtualTaQLColumn engine("iif(Col3,rand(),0)");
newTab.bindColumn("ColVirt", engine);
Table tab(newTab);
friend class SetupNewTable
Definition: DataManager.h:222
@ New
create table
Definition: Table.h:176
VirtualTaQLColumn(const String &expr, const String &style=String())
Construct it with the given TaQL expression.

Definition at line 97 of file VirtualTaQLColumn.h.

Constructor & Destructor Documentation

◆ VirtualTaQLColumn() [1/3]

casacore::VirtualTaQLColumn::VirtualTaQLColumn ( const String expr,
const String style = String() 
)

Construct it with the given TaQL expression.

◆ VirtualTaQLColumn() [2/3]

casacore::VirtualTaQLColumn::VirtualTaQLColumn ( const Record spec)

Construct it with the given specification.

◆ ~VirtualTaQLColumn()

virtual casacore::VirtualTaQLColumn::~VirtualTaQLColumn ( )
virtual

Destructor is mandatory.

◆ VirtualTaQLColumn() [3/3]

casacore::VirtualTaQLColumn::VirtualTaQLColumn ( const VirtualTaQLColumn )
private

Copy is not needed and therefore forbidden (so it is made private).

Member Function Documentation

◆ className()

static String casacore::VirtualTaQLColumn::className ( )
static

Return the name of the class.

◆ clone()

virtual DataManager* casacore::VirtualTaQLColumn::clone ( ) const
virtual

Clone the engine object.

Implements casacore::DataManager.

◆ create64()

virtual void casacore::VirtualTaQLColumn::create64 ( rownr_t  )
privatevirtual

Let the engine initialize the object for a new table.

It defines a column keyword holding the expression.

Reimplemented from casacore::VirtualColumnEngine.

◆ dataManagerSpec()

virtual Record casacore::VirtualTaQLColumn::dataManagerSpec ( ) const
virtual

Get the data manager specification.

Reimplemented from casacore::DataManager.

◆ dataManagerType()

virtual String casacore::VirtualTaQLColumn::dataManagerType ( ) const
virtual

Return the type name of the engine.

(i.e. its class name VirtualTaQLColumn).

Implements casacore::DataManager.

◆ dataType()

virtual int casacore::VirtualTaQLColumn::dataType ( ) const
virtual

Functions to return column info.

Implements casacore::DataManagerColumn.

◆ expression()

const String& casacore::VirtualTaQLColumn::expression ( ) const
inline

Return the TaQL expression used.

Definition at line 137 of file VirtualTaQLColumn.h.

References itsExpr.

◆ fillArray()

void casacore::VirtualTaQLColumn::fillArray ( ArrayBase data)
private

Fill an array with a constant scalar value.

◆ fillColumnCache()

void casacore::VirtualTaQLColumn::fillColumnCache ( )
private

Fill the ColumnCache object with a constant scalar value.

◆ getArrayV()

virtual void casacore::VirtualTaQLColumn::getArrayV ( rownr_t  rownr,
ArrayBase arr 
)
privatevirtual

Get the array value in the given row.

The array given by arr has to have the correct shape (which is guaranteed by the ArrayColumn get function).

Reimplemented from casacore::DataManagerColumn.

◆ getBool()

virtual void casacore::VirtualTaQLColumn::getBool ( rownr_t  rownr,
Bool dataPtr 
)
privatevirtual

Get the scalar value in the given row.

Reimplemented from casacore::DataManagerColumn.

◆ getComplex()

virtual void casacore::VirtualTaQLColumn::getComplex ( rownr_t  rownr,
Complex *  dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getDComplex()

virtual void casacore::VirtualTaQLColumn::getDComplex ( rownr_t  rownr,
DComplex *  dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getdouble()

virtual void casacore::VirtualTaQLColumn::getdouble ( rownr_t  rownr,
double *  dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getfloat()

virtual void casacore::VirtualTaQLColumn::getfloat ( rownr_t  rownr,
float *  dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getInt()

virtual void casacore::VirtualTaQLColumn::getInt ( rownr_t  rownr,
Int dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getInt64()

virtual void casacore::VirtualTaQLColumn::getInt64 ( rownr_t  rownr,
Int64 dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getResult()

void casacore::VirtualTaQLColumn::getResult ( rownr_t  rownr)
private

Get the array result into itsCurArray.

◆ getScalarColumnCellsV()

virtual void casacore::VirtualTaQLColumn::getScalarColumnCellsV ( const RefRows rownrs,
ArrayBase dataPtr 
)
privatevirtual

Get some scalar values in the column.

The vector given in data has to have the correct length (which is guaranteed by the ScalarColumn getColumn function). The default implementation does a getXX per row.

Reimplemented from casacore::DataManagerColumn.

◆ getScalarColumnV()

virtual void casacore::VirtualTaQLColumn::getScalarColumnV ( ArrayBase arr)
privatevirtual

Get functions implemented by means of their DataManagerColumn::getXXBase counterparts, but optimized for constant expressions.

Reimplemented from casacore::DataManagerColumn.

◆ getShort()

virtual void casacore::VirtualTaQLColumn::getShort ( rownr_t  rownr,
Short dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getString()

virtual void casacore::VirtualTaQLColumn::getString ( rownr_t  rownr,
String dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getuChar()

virtual void casacore::VirtualTaQLColumn::getuChar ( rownr_t  rownr,
uChar dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getuInt()

virtual void casacore::VirtualTaQLColumn::getuInt ( rownr_t  rownr,
uInt dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ getuShort()

virtual void casacore::VirtualTaQLColumn::getuShort ( rownr_t  rownr,
uShort dataPtr 
)
privatevirtual

Reimplemented from casacore::DataManagerColumn.

◆ isShapeDefined()

virtual Bool casacore::VirtualTaQLColumn::isShapeDefined ( rownr_t  rownr)
virtual

Is the value shape defined in the given row? By default it returns True.

Reimplemented from casacore::DataManagerColumn.

◆ isWritable()

virtual Bool casacore::VirtualTaQLColumn::isWritable ( ) const
virtual

Test if data can be put into this column.

This does not test if the data file is writable, only if it is in principle allowed to store data into the column. (It may not be allowed for virtual columns). The default is True.

Reimplemented from casacore::DataManagerColumn.

◆ makeCurArray()

void casacore::VirtualTaQLColumn::makeCurArray ( )
private

Make the result cache.

◆ makeIndArrColumn()

virtual DataManagerColumn* casacore::VirtualTaQLColumn::makeIndArrColumn ( const String columnName,
int  dataType,
const String dataTypeId 
)
privatevirtual

Create the column object for the indirect array column in this engine.

Reimplemented from casacore::VirtualColumnEngine.

◆ makeObject()

static DataManager* casacore::VirtualTaQLColumn::makeObject ( const String dataManagerName,
const Record spec 
)
static

Define the "constructor" to construct this engine when a table is read back.

This "constructor" has to be registered by the user of the engine. If the engine is commonly used, its registration can be added into the registerAllCtor function in DataManReg.cc. This function gets automatically invoked by the table system.

◆ makeScalarColumn()

virtual DataManagerColumn* casacore::VirtualTaQLColumn::makeScalarColumn ( const String columnName,
int  dataType,
const String  
)
privatevirtual

Create the column object for the scalar column in this engine.

Reimplemented from casacore::VirtualColumnEngine.

◆ ndim()

virtual uInt casacore::VirtualTaQLColumn::ndim ( rownr_t  rownr)
virtual

Get the dimensionality of the item in the given row.

By default it returns shape(rownr).nelements().

Reimplemented from casacore::DataManagerColumn.

◆ operator=()

VirtualTaQLColumn& casacore::VirtualTaQLColumn::operator= ( const VirtualTaQLColumn )
private

Assignment is not needed and therefore forbidden (so it is made private).

◆ prepare()

virtual void casacore::VirtualTaQLColumn::prepare ( )
privatevirtual

Prepare compiles the expression.

Reimplemented from casacore::VirtualColumnEngine.

◆ registerClass()

static void casacore::VirtualTaQLColumn::registerClass ( )
static

Register the class name and the static makeObject "constructor".

This will make the engine known to the table system.

◆ setMaxLength()

virtual void casacore::VirtualTaQLColumn::setMaxLength ( uInt  maxLength)
virtual

Set the maximum length of a 'fixed length' string.

It is only called (right after the constructor) if the string has a fixed length.

Reimplemented from casacore::DataManagerColumn.

◆ setShapeColumn()

virtual void casacore::VirtualTaQLColumn::setShapeColumn ( const IPosition aShape)
virtual

Set the shape of an array in the column.

It is only called (right after the constructor) if the array has a fixed shape.

Reimplemented from casacore::DataManagerColumn.

◆ shape()

virtual IPosition casacore::VirtualTaQLColumn::shape ( rownr_t  rownr)
virtual

Get the shape of the item in the given row.

By default it returns a zero-length IPosition (for a scalar value).

Reimplemented from casacore::DataManagerColumn.

Member Data Documentation

◆ 

union { ... }

◆ itsBool

Bool casacore::VirtualTaQLColumn::itsBool

Definition at line 235 of file VirtualTaQLColumn.h.

◆ itsColumnName

String casacore::VirtualTaQLColumn::itsColumnName
private

Definition at line 228 of file VirtualTaQLColumn.h.

◆ itsComplex

Complex casacore::VirtualTaQLColumn::itsComplex
private

Definition at line 245 of file VirtualTaQLColumn.h.

◆ itsCurArray

ArrayBase* casacore::VirtualTaQLColumn::itsCurArray
private

Definition at line 248 of file VirtualTaQLColumn.h.

◆ itsCurRow

rownr_t casacore::VirtualTaQLColumn::itsCurRow
private

Definition at line 249 of file VirtualTaQLColumn.h.

◆ itsDataType

int casacore::VirtualTaQLColumn::itsDataType
private

Definition at line 224 of file VirtualTaQLColumn.h.

◆ itsDComplex

DComplex casacore::VirtualTaQLColumn::itsDComplex
private

Definition at line 246 of file VirtualTaQLColumn.h.

◆ itsDouble

Double casacore::VirtualTaQLColumn::itsDouble

Definition at line 243 of file VirtualTaQLColumn.h.

◆ itsExpr

String casacore::VirtualTaQLColumn::itsExpr
private

Definition at line 229 of file VirtualTaQLColumn.h.

Referenced by expression().

◆ itsFloat

Float casacore::VirtualTaQLColumn::itsFloat

Definition at line 242 of file VirtualTaQLColumn.h.

◆ itsInt

Int casacore::VirtualTaQLColumn::itsInt

Definition at line 239 of file VirtualTaQLColumn.h.

◆ itsInt64

Int64 casacore::VirtualTaQLColumn::itsInt64

Definition at line 241 of file VirtualTaQLColumn.h.

◆ itsIsArray

Bool casacore::VirtualTaQLColumn::itsIsArray
private

Definition at line 225 of file VirtualTaQLColumn.h.

◆ itsIsConst

Bool casacore::VirtualTaQLColumn::itsIsConst
private

Definition at line 226 of file VirtualTaQLColumn.h.

◆ itsMaxLen

uInt casacore::VirtualTaQLColumn::itsMaxLen
private

Definition at line 233 of file VirtualTaQLColumn.h.

◆ itsNode

TableExprNode* casacore::VirtualTaQLColumn::itsNode
private

Definition at line 231 of file VirtualTaQLColumn.h.

◆ itsShape

IPosition casacore::VirtualTaQLColumn::itsShape
private

Definition at line 232 of file VirtualTaQLColumn.h.

◆ itsShort

Short casacore::VirtualTaQLColumn::itsShort

Definition at line 237 of file VirtualTaQLColumn.h.

◆ itsString

String casacore::VirtualTaQLColumn::itsString
private

Definition at line 247 of file VirtualTaQLColumn.h.

◆ itsStyle

String casacore::VirtualTaQLColumn::itsStyle
private

Definition at line 230 of file VirtualTaQLColumn.h.

◆ itsTempWritable

Bool casacore::VirtualTaQLColumn::itsTempWritable
private

Definition at line 227 of file VirtualTaQLColumn.h.

◆ itsuChar

uChar casacore::VirtualTaQLColumn::itsuChar

Definition at line 236 of file VirtualTaQLColumn.h.

◆ itsuInt

uInt casacore::VirtualTaQLColumn::itsuInt

Definition at line 240 of file VirtualTaQLColumn.h.

◆ itsuShort

uShort casacore::VirtualTaQLColumn::itsuShort

Definition at line 238 of file VirtualTaQLColumn.h.


The documentation for this class was generated from the following file: