casacore
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Abstract base class for aggregate functions giving a string scalar. More...
#include <ExprGroup.h>
Public Member Functions | |
TableExprGroupFuncString (TableExprNodeRep *node, const String &initValue=String()) | |
virtual | ~TableExprGroupFuncString () |
virtual String | getString (const vector< TableExprId > &) |
Public Member Functions inherited from casacore::TableExprGroupFuncBase | |
TableExprGroupFuncBase (TableExprNodeRep *node) | |
Construct from the TaQL aggregation node. More... | |
virtual | ~TableExprGroupFuncBase () |
virtual Bool | isLazy () const |
Does the aggregate function use lazy semantics? The default implementation returns False. More... | |
uInt | seqnr () const |
Get the function's sequence nr. More... | |
void | setSeqnr (uInt seqnr) |
Set the function's sequence nr. More... | |
virtual void | apply (const TableExprId &id)=0 |
Get the operand's value for the given row and apply it to the aggregation. More... | |
virtual void | finish () |
If needed, finish the aggregation. More... | |
virtual CountedPtr< vector< TableExprId > > | getIds () const |
Get the assembled TableExprIds of a group. More... | |
virtual Bool | getBool (const vector< TableExprId > &=vector< TableExprId >()) |
Get the aggregated value. More... | |
virtual Int64 | getInt (const vector< TableExprId > &=vector< TableExprId >()) |
virtual Double | getDouble (const vector< TableExprId > &=vector< TableExprId >()) |
virtual DComplex | getDComplex (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MVTime | getDate (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< Bool > | getArrayBool (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< Int64 > | getArrayInt (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< Double > | getArrayDouble (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< DComplex > | getArrayDComplex (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< MVTime > | getArrayDate (const vector< TableExprId > &=vector< TableExprId >()) |
virtual MArray< String > | getArrayString (const vector< TableExprId > &=vector< TableExprId >()) |
Protected Attributes | |
String | itsValue |
Protected Attributes inherited from casacore::TableExprGroupFuncBase | |
TableExprNodeRep * | itsNode |
TableExprNodeRep * | itsOperand |
uInt | itsSeqnr |
Abstract base class for aggregate functions giving a string scalar.
Internal
This class is derived from TableExprGroupFuncBase and acts as the abstract base class for aggregate functions resulting in a string scalar.
Derived classes can use itsValue
to contain the aggregated value. It that case they do not need to implement the get
function.
Definition at line 606 of file ExprGroup.h.
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inlineexplicit |
Definition at line 609 of file ExprGroup.h.
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virtual |
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virtual |
Reimplemented from casacore::TableExprGroupFuncBase.
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protected |
Definition at line 617 of file ExprGroup.h.