SSMIndStringColumn.h

Classes

SSMIndStringColumn -- An Indirect String Array Column in the Standard Storage Manager. (full description)

class SSMIndStringColumn : public SSMDirColumn

Interface

Public Members
SSMIndStringColumn (SSMBase* aParent, int aDataType, uInt aColNr)
virtual ~SSMIndStringColumn()
virtual void getArrayStringV (uInt rownr, Array<String>* dataPtr)
virtual void putArrayStringV (uInt rownr, const Array<String>* dataPtr)
void setShape (uInt aRowNr, const IPosition& aShape)
virtual IPosition shape (uInt aRowNr)
Bool canChangeShape() const
virtual Bool isShapeDefined (uInt aRowNr)
virtual uInt ndim (uInt aRowNr)
Private Members
SSMIndStringColumn (const SSMIndStringColumn&)
SSMIndStringColumn& operator= (const SSMIndStringColumn&)

Description

Review Status

Programs:
Tests:

Prerequisite

Etymology

SSMIndStringColumn represents an Indirect String Array Column in the Standard Storage Manager.

Synopsis

SSMIndStringColumn handles indirect variable shaped string arrays. Note that indirect fixed shape string arrays are handled by SSMDirColumn.

All string array access is handled by class SSMStringHandler, so SSMIndStringColumn is merely an interface to this class. The only thing it does is accessing the bucketnr, offset, and length in the data bucket.

Motivation

The reason that indirect string arrays are handled here instead of in SSMIndColumn is that the string buckets are more disk space efficient when string arrays are frequently updated.

Member Description

SSMIndStringColumn (SSMBase* aParent, int aDataType, uInt aColNr)

Create a SSMIndStringColumn object with the given parent. It initializes the various variables. It keeps the pointer to its parent (but does not own it).

virtual ~SSMIndStringColumn()

virtual void getArrayStringV (uInt rownr, Array<String>* dataPtr)

Get an array value in the given row. An exception is thrown if no array is defined in this row.

virtual void putArrayStringV (uInt rownr, const Array<String>* dataPtr)

Put an array value in the given row.

void setShape (uInt aRowNr, const IPosition& aShape)

Set the shape of the array in the given row.

virtual IPosition shape (uInt aRowNr)

Get the shape of the array in the given row.

Bool canChangeShape() const

This storage manager can handle changing array shapes.

virtual Bool isShapeDefined (uInt aRowNr)

Is the shape defined (i.e. is there an array) in this row?

virtual uInt ndim (uInt aRowNr)

Get the dimensionality of the item in the given row.

SSMIndStringColumn (const SSMIndStringColumn&)

Forbid copy constructor.

SSMIndStringColumn& operator= (const SSMIndStringColumn&)

Forbid assignment.