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Engine for TaQL UDF Epoch conversions. More...
#include <EpochEngine.h>
Public Member Functions | |
| EpochEngine () | |
| virtual | ~EpochEngine () |
| Bool | sidFrac () const |
| Tell if the fraction has to be used for sidereal times. More... | |
| Array< Double > | getArrayDouble (const TableExprId &id) |
| Get the values. More... | |
| Array< MEpoch > | getEpochs (const TableExprId &id) |
| Get the epochs. More... | |
| void | handleEpoch (std::vector< TENShPtr > &args, uInt &argnr) |
| Handle the argument(s) giving the input epochs and reference type. More... | |
| void | setConverter (MEpoch::Types toType, Bool sidFrac) |
| Set the MeasConvert object. More... | |
| void | setPositionEngine (PositionEngine &engine) |
| Set the possible position engine. More... | |
 Public Member Functions inherited from casacore::MeasEngine< MEpoch > | |
| MeasEngine () | |
| virtual | ~MeasEngine () |
| MEpoch::Types | refType () const |
| Get the reference type. More... | |
| Bool | handleMeasType (const TENShPtr &operand, Bool doThrow) |
| Handle a doppler reference type. More... | |
| Record | makeAttributes (typename MEpoch::Types refType, Int valueType=1) const |
| Make the expression result attributes. More... | |
| Public Member Functions inherited from casacore::BaseEngine | |
| BaseEngine () | |
| virtual | ~BaseEngine () |
| void | adaptForConstant (const IPosition &shapeConstant, uInt nvalues=0) |
| Adapt the output shape and dimensionality for possible constant values. More... | |
| void | extendBase (const BaseEngine &, Bool removeFirstAxis=False) |
| Extend the shape (if not empty) with the engine's shape. More... | |
| const IPosition & | shape () const |
| Get the output shape. More... | |
| Int | ndim () const |
| Get the output dimensionality. More... | |
| const Unit & | unit () const |
| Get the unit of the function's result. More... | |
| const Unit & | inUnit () const |
| Get the unit of the expression. More... | |
| Bool | isConstant () const |
| Tell if the expression is constant. More... | |
Private Member Functions | |
| virtual String | stripMeasType (const String &type) |
| Strip a possible prefix from the epoch type. More... | |
| virtual void | handleValues (TableExprNode &operand, const TableExprId &id, Array< MEpoch > &epochs) |
| Let a derive class handle the values. More... | |
Private Attributes | |
| Bool | itsSidFrac |
| MeasFrame | itsFrame |
| MEpoch::Convert | itsConverter |
| PositionEngine * | itsPositionEngine |
Additional Inherited Members | |
| Protected Member Functions inherited from casacore::MeasEngine< MEpoch > | |
| void | handleMeasArray (const TENShPtr &operand) |
| Handle the operand representing an array of Meas values. More... | |
| void | handleConstant (const TENShPtr &operand) |
| Handle a constant Meas value. More... | |
| Protected Member Functions inherited from casacore::BaseEngine | |
| virtual void | deriveAttr (const Unit &unit, Int nval) |
| Let a derived class derive its attributes. More... | |
| virtual void | setValueType (Int valueType) |
| Let a derived class set its value type. More... | |
| Protected Attributes inherited from casacore::MeasEngine< MEpoch > | |
| Array< MEpoch > | itsConstants |
| MEpoch::Types | itsRefType |
| ScalarMeasColumn< MEpoch > | itsMeasScaCol |
| ArrayMeasColumn< MEpoch > | itsMeasArrCol |
| Protected Attributes inherited from casacore::BaseEngine | |
| Bool | itsIsConst |
| IPosition | itsShape |
| Int | itsNDim |
| Unit | itsInUnit |
| Unit | itsOutUnit |
| TableExprNode | itsExprNode |
Engine for TaQL UDF Epoch conversions.
Public interface
EpochEngine defines Engines (user defined functions) that can be used in TaQL to convert Measures for epochs. In this way such derived values appear to be ordinary TaQL functions.
In TaQL these functions can be called like:
toref is a single constant string. pos can have various value types. A single numeric array is a series of RA,DEC in J2000. If given as a set, the last argument of the set can be the reference types of the values in the set. The values can be strings (indicating planetary objects) or value pairs giving lon,lat. The default reference type is J2000. All functions have data type double and unit radian.
A epoch can also be a table column which usually knows its type. It can also be an expression (e.g. EPOCH[0,]) which also knows the type.
It makes it possible to handle measures in TaQL.
Definition at line 90 of file EpochEngine.h.
| casacore::EpochEngine::EpochEngine | ( | ) |
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virtual |
| Array<Double> casacore::EpochEngine::getArrayDouble | ( | const TableExprId & | id | ) |
Get the values.
| Array<MEpoch> casacore::EpochEngine::getEpochs | ( | const TableExprId & | id | ) |
Get the epochs.
Handle the argument(s) giving the input epochs and reference type.
The epoch can be a column in a table.
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privatevirtual |
Let a derive class handle the values.
Implements casacore::MeasEngine< MEpoch >.
| void casacore::EpochEngine::setConverter | ( | MEpoch::Types | toType, |
| Bool | sidFrac | ||
| ) |
Set the MeasConvert object.
| void casacore::EpochEngine::setPositionEngine | ( | PositionEngine & | engine | ) |
Set the possible position engine.
It can be done only once.
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inline |
Tell if the fraction has to be used for sidereal times.
Definition at line 98 of file EpochEngine.h.
References itsSidFrac.
Strip a possible prefix from the epoch type.
Reimplemented from casacore::BaseEngine.
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private |
Definition at line 129 of file EpochEngine.h.
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private |
Definition at line 128 of file EpochEngine.h.
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private |
Definition at line 130 of file EpochEngine.h.
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private |
Definition at line 127 of file EpochEngine.h.
Referenced by sidFrac().
1.8.5