casacore::Record Class Reference

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#include <Record.h>

Public Member Functions
	Record ()
	Create a record with no fields.
	Record (RecordType type, CheckFieldFunction *=0, const void *checkArgument=0)
	Create a record with no fields.
	Record (const RecordDesc &description, RecordType type=Fixed, CheckFieldFunction *=0, const void *checkArgument=0)
	Create a record with the given description.
	Record (const Record &other)
	Create a copy of other using copy semantics.
	Record (const RecordInterface &other)
	Create a Record from another type of record using copy semantics.
Record &	operator= (const Record &other)
	Copy the data in the other record to this record.
	~Record ()
	Release resources associated with this object.
RecordInterface *	clone () const override
	Make a copy of this object.
void	assign (const RecordInterface &that) override
	Assign that RecordInterface object to this one.
const String &	comment (const RecordFieldId &) const override
	Get the comment for this field.
void	setComment (const RecordFieldId &, const String &comment) override
	Set the comment for this field.
const RecordDesc &	description () const
	Describes the current structure of this Record.
void	restructure (const RecordDesc &newDescription, Bool recursive=True) override
	Change the structure of this Record to contain the fields in newDescription.
Bool	conform (const Record &other) const
	Returns True if this and other have the same RecordDesc, other than different names for the fields.
uInt	nfields () const override
	How many fields does this structure have? A convenient synonym for description().nfields().
Int	fieldNumber (const String &fieldName) const override
	Get the field number from the field name.
DataType	type (Int whichField) const override
	Get the data type of this field.
void	removeField (const RecordFieldId &) override
	Remove a field from the record.
void	renameField (const String &newName, const RecordFieldId &)
	Rename the given field.
void	defineRecord (const RecordFieldId &, const Record &value, RecordType type=Variable)
	Define a value for the given field containing a subrecord.
void	defineRecord (const RecordFieldId &, const RecordInterface &value, RecordType=Variable) override
const Record &	subRecord (const RecordFieldId &) const
	Get the subrecord from the given field.
Record &	rwSubRecord (const RecordFieldId &)
const RecordInterface &	asRecord (const RecordFieldId &) const override
RecordInterface &	asrwRecord (const RecordFieldId &) override
ValueHolder	asValueHolder (const RecordFieldId &) const override
	Get or define the value as a ValueHolder.
void	defineFromValueHolder (const RecordFieldId &, const ValueHolder &) override
void	mergeField (const Record &other, const RecordFieldId &, DuplicatesFlag=ThrowOnDuplicates)
	Merge a field from another record into this record.
void	merge (const Record &other, DuplicatesFlag=ThrowOnDuplicates)
	Merge all fields from the other record into this record.
void	putRecord (AipsIO &os) const
	Write the Record to an output stream.
void	getRecord (AipsIO &os)
	Read the Record from an input stream.
void	putData (AipsIO &os) const
	Put the data of a record.
void	getData (AipsIO &os, uInt version)
	Read the data of a record.
void	makeUnique () override
	Make a unique record representation (to do copy-on-write in RecordFieldPtr).
void	print (std::ostream &, Int maxNrValues=25, const String &indent="") const override
	Print the contents of the record.
Public Member Functions inherited from casacore::RecordInterface
	RecordInterface ()
	The default constructor creates an empty record with a variable structure.
	RecordInterface (RecordType type, CheckFieldFunction *funcPtr, const void *checkArgument)
	Create a record with no fields.
	RecordInterface (const RecordInterface &other)
	Copy constructor (copy semantics).
RecordInterface &	operator= (const RecordInterface &other)
	Assignment (copy semantics).
virtual	~RecordInterface ()
	Destruct the record.
Bool	isFixed () const
	Is the Record structure fixed (i.e.
uInt	size () const
bool	empty () const
	Is the record empty?
Int	idToNumber (const RecordFieldId &) const
	Get the field number for the given field id.
Bool	isDefined (const String &fieldName) const
	Test if a field name exists.
DataType	dataType (const RecordFieldId &) const
String	name (const RecordFieldId &) const
	Get the name of this field.
IPosition	shape (const RecordFieldId &) const
	Get the actual shape of this field.
RecordDesc	description () const
	Get the description of this record.
void	define (const RecordFieldId &, Bool value)
	Define a value for the given field.
void	define (const RecordFieldId &, uChar value)
void	define (const RecordFieldId &, Short value)
void	define (const RecordFieldId &, Int value)
void	define (const RecordFieldId &, uInt value)
void	define (const RecordFieldId &, Int64 value)
void	define (const RecordFieldId &, Float value)
void	define (const RecordFieldId &, Double value)
void	define (const RecordFieldId &, const Complex &value)
void	define (const RecordFieldId &, const DComplex &value)
void	define (const RecordFieldId &, const Char *value)
void	define (const RecordFieldId &, const String &value)
void	define (const RecordFieldId &, const Array< Bool > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< uChar > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Short > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Int > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< uInt > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Int64 > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Float > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Double > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< Complex > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< DComplex > &value, Bool FixedShape=False)
void	define (const RecordFieldId &, const Array< String > &value, Bool FixedShape=False)
void	get (const RecordFieldId &, Bool &value) const
	Get the value of the given field.
void	get (const RecordFieldId &, uChar &value) const
void	get (const RecordFieldId &, Short &value) const
void	get (const RecordFieldId &, Int &value) const
void	get (const RecordFieldId &, uInt &value) const
void	get (const RecordFieldId &, Int64 &value) const
void	get (const RecordFieldId &, Float &value) const
void	get (const RecordFieldId &, Double &value) const
void	get (const RecordFieldId &, Complex &value) const
void	get (const RecordFieldId &, DComplex &value) const
void	get (const RecordFieldId &, String &value) const
void	get (const RecordFieldId &, Array< Bool > &value) const
void	get (const RecordFieldId &, Array< uChar > &value) const
void	get (const RecordFieldId &, Array< Short > &value) const
void	get (const RecordFieldId &, Array< Int > &value) const
void	get (const RecordFieldId &, Array< uInt > &value) const
void	get (const RecordFieldId &, Array< Int64 > &value) const
void	get (const RecordFieldId &, Array< Float > &value) const
void	get (const RecordFieldId &, Array< Double > &value) const
void	get (const RecordFieldId &, Array< Complex > &value) const
void	get (const RecordFieldId &, Array< DComplex > &value) const
void	get (const RecordFieldId &, Array< String > &value) const
Bool	asBool (const RecordFieldId &) const
	The following functions get the value based on field name or number.
uChar	asuChar (const RecordFieldId &) const
Short	asShort (const RecordFieldId &) const
Int	asInt (const RecordFieldId &) const
uInt	asuInt (const RecordFieldId &) const
Int64	asInt64 (const RecordFieldId &) const
Float	asFloat (const RecordFieldId &) const
Double	asDouble (const RecordFieldId &) const
Complex	asComplex (const RecordFieldId &) const
DComplex	asDComplex (const RecordFieldId &) const
const String &	asString (const RecordFieldId &) const
const Array< Bool > &	asArrayBool (const RecordFieldId &) const
const Array< uChar > &	asArrayuChar (const RecordFieldId &) const
const Array< Short > &	asArrayShort (const RecordFieldId &) const
const Array< Int > &	asArrayInt (const RecordFieldId &) const
const Array< uInt > &	asArrayuInt (const RecordFieldId &) const
const Array< Int64 > &	asArrayInt64 (const RecordFieldId &) const
const Array< Float > &	asArrayFloat (const RecordFieldId &) const
const Array< Double > &	asArrayDouble (const RecordFieldId &) const
const Array< Complex > &	asArrayComplex (const RecordFieldId &) const
const Array< DComplex > &	asArrayDComplex (const RecordFieldId &) const
const Array< String > &	asArrayString (const RecordFieldId &) const
Array< Bool >	toArrayBool (const RecordFieldId &) const
	Get an array while promoting the data as needed.
Array< uChar >	toArrayuChar (const RecordFieldId &) const
Array< Short >	toArrayShort (const RecordFieldId &) const
Array< Int >	toArrayInt (const RecordFieldId &) const
Array< uInt >	toArrayuInt (const RecordFieldId &) const
Array< Int64 >	toArrayInt64 (const RecordFieldId &) const
Array< Float >	toArrayFloat (const RecordFieldId &) const
Array< Double >	toArrayDouble (const RecordFieldId &) const
Array< Complex >	toArrayComplex (const RecordFieldId &) const
Array< DComplex >	toArrayDComplex (const RecordFieldId &) const
Array< String >	toArrayString (const RecordFieldId &) const
void	toArray (const RecordFieldId &id, Array< Bool > &array) const
void	toArray (const RecordFieldId &id, Array< uChar > &array) const
void	toArray (const RecordFieldId &id, Array< Short > &array) const
void	toArray (const RecordFieldId &id, Array< Int > &array) const
void	toArray (const RecordFieldId &id, Array< uInt > &array) const
void	toArray (const RecordFieldId &id, Array< Int64 > &array) const
void	toArray (const RecordFieldId &id, Array< Float > &array) const
void	toArray (const RecordFieldId &id, Array< Double > &array) const
void	toArray (const RecordFieldId &id, Array< Complex > &array) const
void	toArray (const RecordFieldId &id, Array< DComplex > &array) const
void	toArray (const RecordFieldId &id, Array< String > &array) const
Float	asfloat (const RecordFieldId &) const
	Get value based on field name or number.
Double	asdouble (const RecordFieldId &) const
const Array< Float > &	asArrayfloat (const RecordFieldId &) const
const Array< Double > &	asArraydouble (const RecordFieldId &) const

Protected Member Functions
void *	get_pointer (Int whichField, DataType type) const override
	Used by the RecordField classes to attach in a type-safe way to the correct field.
void *	get_pointer (Int whichField, DataType type, const String &recordType) const override
const RecordRep &	ref () const
	Return a const reference to the underlying RecordRep.
RecordRep &	rwRef ()
	Return a non-const reference to the underlying RecordRep.
void	addDataField (const String &name, DataType type, const IPosition &shape, Bool fixedShape, const void *value) override
	Add a field to the record.
void	defineDataField (Int whichField, DataType type, const void *value) override
	Define a value in the given field.
Protected Member Functions inherited from casacore::RecordInterface
void	throwIfFixed () const
	Check if the Record has a non-fixed structure.
void	checkName (const String &fieldName, DataType type) const
	Check if the new field name is correct.
RecordType &	recordType ()
	Give access to the RecordType flag (write-access is needed when a record is read back).
RecordType	recordType () const
Int	newIdToNumber (const RecordFieldId &) const
	Get the field number for the given field id.
void	defineField (const RecordFieldId &, DataType type, const void *value)
	Add a scalar field with the given type and value.
void	defineField (const RecordFieldId &, DataType type, const IPosition &shape, Bool fixedShape, const void *value)
	Add an array field with the given type, shape and value.

Private Member Functions
RecordDesc	getDescription () const override
	Get the description of this record.
	Record (RecordRep *parent, const RecordDesc &description)
	Create Record as a subrecord.
	Record (RecordRep *parent, RecordType type)

Private Attributes
COWPtr< RecordRep >	rep_p
	The Record representation.
RecordRep *	parent_p
	The parent Record.

Friends
class	RecordRep
AipsIO &	operator<< (AipsIO &os, const Record &rec)
	Write the Record to an output stream.
AipsIO &	operator>> (AipsIO &os, Record &rec)
	Read the Record from an input stream.

Additional Inherited Members
Public Types inherited from casacore::RecordInterface
enum	RecordType {   Fixed ,   Variable }
	Define the flag telling if a Record has a fixed or variable structure. More...
enum	DuplicatesFlag {   RenameDuplicates ,   SkipDuplicates ,   OverwriteDuplicates ,   ThrowOnDuplicates }
	Define the Duplicates flag for the function merge in the various record classes. More...
typedef Bool	CheckFieldFunction(const String &fieldName, DataType dataType, const void *extraArgument, String &message)
	Define the signature of the add callback function.

Detailed Description

A hierarchical collection of named fields of various types

Intended use:

Public interface

Review Status

Reviewed By:

Mark Wieringa

Date Reviewed:

1996/04/15

Test programs:

tRecord

Prerequisite

• RecordDesc.
• RecordInterface.
• RecordFieldPtr.

Etymology

`‘Record’' is a widely used term in both programming languages and data structures to denote an imhogeneous set of fields. An alternative would have been to name it structure, which would have perhaps been a clearer name for C++ programmers.

Synopsis

Class RecordInterface decribes the fundamental properties of records.
The Record class is a particular type of a record class. The fields in Record may be of scalar type, array type, or a Record. The types are chosen to be compatible with the native types of the Table system, viz: Bool, uChar, Short, Int, uInt, float, double, Complex, DComplex, String. Arrays of all these types are also available. Note that a Record is not a space-efficient way of storing small objects.

The structure of a Record is defined by the RecordDesc class. The structure of the Record can be defined at construction time. It can thereafter be restructured. This has the effect, however, that any existing RecordFieldPtr objects become invalid.
It is possible to add or remove fields once a Record is constructed. However, this is not possible when the Record is constructed with a fixed structure (i.e. with the fixedStructure flag set).

A Record is a hierarchical structure, because it can have fields containing Record's (as layed out in the RecordDesc). A subrecord has a variable structure, when its RecordDesc is empty (i.e. contains no fields). It is fixed when its RecordDesc contains fields.

A Record may be assigned to another only if they conform; that is if their fields have the identical type in the identical order. The field names do not need to be identical however, only the types. That is, the structure needs to be identical, but not the labels. Note that field order is significant, [ifield(type=Int),ffield(type=float)] is not the same as [ffield(type=float),ifield(type=Int)]
Conformance is checked recursively for fixed subrecords. That is, a variable structured subrecord is not checked, because any record can be assigned to it. A fixed structured subrecord has to conform the corresponding subrecord in the source.

Record uses copy-on-write semantics. This means that when a Record is copied, only the pointer to the underlying RecordRep object is copied. Only when the Record gets changed (i.e. when a non-const Record member function is called), the RecordRep object is copied. This results in a cheap copy behaviour.

Example

Suppose we wanted to create a records that describe the favorite example of the OO world - an employee:

RecordDesc employeeDesc;
employeeDesc.addField ("name", TpString);
employeeDesc.addField ("salary", TpDouble);

The above creates the description (structure) for some record objects.

Record employeeA(employeeDesc);
Record employeeB(employeeDesc, False);

And these two lines create Record objects which share this common structure. The first Record has a fixed structure, the 2nd variable.

RecordFieldPtr<String> nameA(employeeA, 0);
RecordFieldPtr<String> nameB(employeeB, 0);
RecordFieldPtr<double> salaryA(employeeA, 1);
RecordFieldPtr<double> salaryB(employeeB, "salary");

This shows how we can get access to the individual fields. The fields are fundamentally identified by number, but the number can be looked up through the use of the fieldNumber member function.

nameA.define ("Tim");
nameB.define ("Brian");
salaryA.define (1.0e+8);
salaryB.define (1.0 / *salaryA);

Once obtained, the fields are readily manipulated, as shown above. Note that the field values are obtained through the dereference (*) operator. This is to identify that the field objects are pointers to the values in the underlying Record; that is

salaryA = salaryB;
*salaryA = *salaryB;

Do very different things; the first line is a pointer copy; salaryA and salaryB now point to the same field in salaryB. The second line is a value copy.

Whole records can be copied as long as their structures are compatible, so that employeeA = employeeB is a legal statement. However, if the structure is changed, assignment is no longer possible, and all of the field pointers are invalidated:

employeeB.define ("age", (Int)40);
employeeA = employeeB;                // exception - no longer conformant

Motivation

Collections of data with different types are frequently needed. Record makes it possible to hold such data in a flexible way.

To Do

• A record reference class, which contains some fields from another record, would likely be useful. This would be analagous to a subarray sliced from an existing array.

Definition at line 177 of file Record.h.

Constructor & Destructor Documentation

Record() [1/7]

casacore::Record::Record

(

)

Create a record with no fields.

The record has a variable structure.

Record() [2/7]

casacore::Record::Record ( RecordType  type, CheckFieldFunction *  = 0, const void *  checkArgument = 0  )

explicit

Create a record with no fields.

The type determines if the record has a fixed or variable structure. The callback function is called when a field is added to the Record. That function can check the name and of data type of the new field (for instance, the Table system uses it to ensure that table columns and keywords have different names).

Record() [3/7]

casacore::Record::Record ( const RecordDesc &  description, RecordType  type = Fixed, CheckFieldFunction *  = 0, const void *  checkArgument = 0  )

explicit

Create a record with the given description.

If it is not possible to create all fields (for example, if a field with an unsupported data type is requested), an exception is thrown. The type determines if the record has a fixed or variable structure. All fields are checked by the field checking function (if defined) (for instance, the Table system uses it to ensure that table columns and keywords have different names).

Record() [4/7]

casacore::Record::Record

(

const Record &

other

)

Create a copy of other using copy semantics.

Record() [5/7]

casacore::Record::Record

(

const RecordInterface &

other

)

Create a Record from another type of record using copy semantics.

Subrecords are also converted to a Record.

~Record()

casacore::Record::~Record

(

)

Release resources associated with this object.

Record() [6/7]

casacore::Record::Record ( RecordRep *  parent, const RecordDesc &  description  )

private

Create Record as a subrecord.

When the description is empty, the record has a variable structure. Otherwise it is fixed.

Record() [7/7]

casacore::Record::Record ( RecordRep *  parent, RecordType  type  )

private

Member Function Documentation

addDataField()

void casacore::Record::addDataField ( const String &  name, DataType  type, const IPosition &  shape, Bool  fixedShape, const void *  value  )

overrideprotectedvirtual

Add a field to the record.

Implements casacore::RecordInterface.

asRecord()

const RecordInterface & casacore::Record::asRecord ( const RecordFieldId &  ) const

overridevirtual

Implements casacore::RecordInterface.

Referenced by casacore::ValueHolder::asRecord().

asrwRecord()

RecordInterface & casacore::Record::asrwRecord ( const RecordFieldId &  )

overridevirtual

Implements casacore::RecordInterface.

assign()

void casacore::Record::assign ( const RecordInterface &  that )

overridevirtual

Assign that RecordInterface object to this one.

Unlike operator= it copies all data in the derived class.

Implements casacore::RecordInterface.

asValueHolder()

ValueHolder casacore::Record::asValueHolder ( const RecordFieldId &  ) const

overridevirtual

Get or define the value as a ValueHolder.

This is useful to pass around a value of any supported type.

Reimplemented from casacore::RecordInterface.

clone()

RecordInterface * casacore::Record::clone ( ) const

overridevirtual

Make a copy of this object.

Implements casacore::RecordInterface.

comment()

const String & casacore::Record::comment ( const RecordFieldId &  ) const

overridevirtual

Get the comment for this field.

Implements casacore::RecordInterface.

conform()

Bool casacore::Record::conform ( const Record &  other ) const

inline

Returns True if this and other have the same RecordDesc, other than different names for the fields.

That is, the number, type and the order of the fields must be identical (recursively for fixed structured sub-Records in this).
Caution: thisRecord;conform(thatRecord) == True does not imply
thatRecord;conform(thisRecord) == True, because a variable record in one conforms a fixed record in that, but not vice-versa;

Definition at line 447 of file Record.h.

References casacore::RecordRep::conform(), and ref().

defineDataField()

void casacore::Record::defineDataField ( Int  whichField, DataType  type, const void *  value  )

overrideprotectedvirtual

Define a value in the given field.

Implements casacore::RecordInterface.

defineFromValueHolder()

void casacore::Record::defineFromValueHolder ( const RecordFieldId &  , const ValueHolder &    )

overridevirtual

Reimplemented from casacore::RecordInterface.

defineRecord() [1/2]

void casacore::Record::defineRecord	(	const RecordFieldId &	,
		const Record &	value,
		RecordType	type = Variable
	)

Define a value for the given field containing a subrecord.

When the field is unknown, it will be added to the record. The second version is meant for any type of record (e.g. Record, TableRecord, GlishRecord). It is converted to a Record using the Record constructor taking a RecordInterface object.

Referenced by casacore::RFWriter::setOptions().

defineRecord() [2/2]

void casacore::Record::defineRecord ( const RecordFieldId &  , const RecordInterface &  value, RecordType  = Variable  )

overridevirtual

Implements casacore::RecordInterface.

description()

const RecordDesc & casacore::Record::description ( ) const

inline

Describes the current structure of this Record.

Definition at line 442 of file Record.h.

References casacore::RecordRep::description(), and ref().

fieldNumber()

Int casacore::Record::fieldNumber ( const String &  fieldName ) const

overridevirtual

Get the field number from the field name.

-1 is returned if the field name is unknown.

Implements casacore::RecordInterface.

get_pointer() [1/2]

void * casacore::Record::get_pointer ( Int  whichField, DataType  type  ) const

overrideprotectedvirtual

Used by the RecordField classes to attach in a type-safe way to the correct field.

Implements casacore::RecordInterface.

get_pointer() [2/2]

void * casacore::Record::get_pointer ( Int  whichField, DataType  type, const String &  recordType  ) const

overrideprotectedvirtual

Implements casacore::RecordInterface.

getData()

void casacore::Record::getData ( AipsIO &  os, uInt  version  )

inline

Read the data of a record.

This is used to read a subrecord, whose description has already been read.

Definition at line 467 of file Record.h.

References casacore::RecordRep::getData(), and rwRef().

getDescription()

RecordDesc casacore::Record::getDescription ( ) const

overrideprivatevirtual

Get the description of this record.

Implements casacore::RecordInterface.

getRecord()

void casacore::Record::getRecord

(

AipsIO &

os

)

Read the Record from an input stream.

This is used to read a subrecord, whose description has not been read.

makeUnique()

void casacore::Record::makeUnique ( )

overridevirtual

Make a unique record representation (to do copy-on-write in RecordFieldPtr).

Implements casacore::RecordInterface.

merge()

void casacore::Record::merge	(	const Record &	other,
		DuplicatesFlag	= ThrowOnDuplicates
	)

Merge all fields from the other record into this record.

The DuplicatesFlag (as described in RecordInterface) determines what will be done in case a field name already exists. An exception will be thrown if other is the same as this (i.e. if merging the record itself).

mergeField()

void casacore::Record::mergeField	(	const Record &	other,
		const RecordFieldId &	,
		DuplicatesFlag	= ThrowOnDuplicates
	)

Merge a field from another record into this record.

The DuplicatesFlag (as described in RecordInterface) determines what will be done in case the field name already exists.

nfields()

uInt casacore::Record::nfields ( ) const

overridevirtual

How many fields does this structure have? A convenient synonym for description().nfields().

Implements casacore::RecordInterface.

operator=()

Record & casacore::Record::operator=

(

const Record &

other

)

Copy the data in the other record to this record.

It can operate in 2 ways depending on the Record structure flag.

• For variable structured records the existing fields are thrown away and replaced by the new fields. This means that RecordFieldPtr's using this record get invalidated. Because copy-on-write semantics are used, this kind of assignment is a very efficient operation.
• For fixed structured records the existing values are replaced by the new values. This means that RecordFieldPtr's using this record remain valid. The structure of the other record has to conform this record or this record has to be empty, otherwise an exception is thrown. This assignment is less efficient, because it has to check the conformance and because each value has to be copied.

Warning: Attributes like fixed structure flag and check function will not be copied;

print()

void casacore::Record::print ( std::ostream &  , Int  maxNrValues = 25, const String &  indent = ""  ) const

overridevirtual

Print the contents of the record.

Only the first maxNrValues of an array will be printed. A value < 0 means the entire array.

Implements casacore::RecordInterface.

putData()

void casacore::Record::putData ( AipsIO &  os ) const

inline

Put the data of a record.

This is used to write a subrecord, whose description has already been written.

Definition at line 457 of file Record.h.

References casacore::RecordRep::putData(), and ref().

putRecord()

void casacore::Record::putRecord

(

AipsIO &

os

)

const

Write the Record to an output stream.

This is used to write a subrecord, whose description has not been written.

ref()

const RecordRep & casacore::Record::ref ( ) const

inlineprotected

Return a const reference to the underlying RecordRep.

Definition at line 438 of file Record.h.

References rep_p.

Referenced by conform(), description(), and putData().

removeField()

void casacore::Record::removeField ( const RecordFieldId &  )

overridevirtual

Remove a field from the record.

Caution: Removing a field means that the field number of the fields following it will be decremented; Only the RecordFieldPtr's pointing to the removed field will be invalidated;

Implements casacore::RecordInterface.

renameField()

void casacore::Record::renameField	(	const String &	newName,
		const RecordFieldId &
	)

Rename the given field.

restructure()

void casacore::Record::restructure ( const RecordDesc &  newDescription, Bool  recursive = True  )

overridevirtual

Change the structure of this Record to contain the fields in newDescription.

After calling restructure, description() == newDescription. Any existing RecordFieldPtr objects are invalidated (their isAttached() members return False) after this call.
When the new description contains subrecords, those subrecords will be restructured if recursive=True is given. Otherwise the subrecord is a variable empty record. Subrecords will be variable if their description is empty (i.e. does not contain any field), otherwise they are fixed. The 2nd form of the restructure function will overwrite those implicit record types with the given record type. The new type will also be given to this top record.
Restructuring is not possible and an exception is thrown if the Record has a fixed structure.

Implements casacore::RecordInterface.

rwRef()

RecordRep & casacore::Record::rwRef ( )

protected

Return a non-const reference to the underlying RecordRep.

When needed, the RecordRep will be copied and all RecordField objects will be notified.

Referenced by getData().

rwSubRecord()

Record & casacore::Record::rwSubRecord

(

const RecordFieldId &

)

setComment()

void casacore::Record::setComment ( const RecordFieldId &  , const String &  comment  )

overridevirtual

Set the comment for this field.

Implements casacore::RecordInterface.

subRecord()

const Record & casacore::Record::subRecord

(

const RecordFieldId &

)

const

Get the subrecord from the given field.

Note: The non-const version has a different name to prevent that the copy-on-write mechanism makes a copy when not necessary;

type()

DataType casacore::Record::type ( Int  whichField ) const

overridevirtual

Get the data type of this field.

Implements casacore::RecordInterface.

Friends And Related Symbol Documentation

operator<<

AipsIO & operator<< ( AipsIO &  os, const Record &  rec  )

friend

Write the Record to an output stream.

Definition at line 452 of file Record.h.

operator>>

AipsIO & operator>> ( AipsIO &  os, Record &  rec  )

friend

Read the Record from an input stream.

Definition at line 462 of file Record.h.

RecordRep

friend class RecordRep

friend

Definition at line 179 of file Record.h.

Member Data Documentation

parent_p

RecordRep* casacore::Record::parent_p

private

The parent Record.

Definition at line 433 of file Record.h.

rep_p

COWPtr<RecordRep> casacore::Record::rep_p

private

The Record representation.

Definition at line 431 of file Record.h.

Referenced by ref().

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

• casa/Containers/Record.h