casacore
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#include <SubLattice.h>
Public Member Functions | |
SubLattice () | |
The default constructor creates a SubLattice that is useless for just about everything, except that it can be assigned to with the assignment operator. More... | |
SubLattice (const Lattice< T > &lattice, AxesSpecifier=AxesSpecifier()) | |
Create a SubLattice from a Lattice. More... | |
SubLattice (Lattice< T > &lattice, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const MaskedLattice< T > &lattice, AxesSpecifier=AxesSpecifier()) | |
Create a SubLattice from a MaskedLattice. More... | |
SubLattice (MaskedLattice< T > &lattice, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const Lattice< T > &lattice, const LatticeRegion ®ion, AxesSpecifier=AxesSpecifier()) | |
Create a SubLattice from the given MaskedLattice and region. More... | |
SubLattice (Lattice< T > &lattice, const LatticeRegion ®ion, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const MaskedLattice< T > &lattice, const LatticeRegion ®ion, AxesSpecifier=AxesSpecifier()) | |
SubLattice (MaskedLattice< T > &lattice, const LatticeRegion ®ion, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const Lattice< T > &lattice, const Slicer &slicer, AxesSpecifier=AxesSpecifier()) | |
Create a SubLattice from the given (Masked)Lattice and slicer. More... | |
SubLattice (Lattice< T > &lattice, const Slicer &slicer, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const MaskedLattice< T > &lattice, const Slicer &slicer, AxesSpecifier=AxesSpecifier()) | |
SubLattice (MaskedLattice< T > &lattice, const Slicer &slicer, Bool writableIfPossible, AxesSpecifier=AxesSpecifier()) | |
SubLattice (const SubLattice< T > &other) | |
Copy constructor (reference semantics). More... | |
virtual | ~SubLattice () |
SubLattice< T > & | operator= (const SubLattice< T > &other) |
Assignment (reference semantics). More... | |
virtual MaskedLattice< T > * | cloneML () const |
Make a copy of the object (reference semantics). More... | |
virtual Bool | isMasked () const |
Is the lattice masked? It is if its parent lattice or its region is masked. More... | |
virtual Bool | isPersistent () const |
A SubLattice is persistent if no region is applied to the parent lattice. More... | |
virtual Bool | isPaged () const |
Is the SubLattice paged to disk? More... | |
virtual Bool | canReferenceArray () const |
Can the lattice data be referenced as an array section? More... | |
virtual Bool | isWritable () const |
Is the SubLattice writable? More... | |
virtual Bool | lock (FileLocker::LockType, uInt nattempts) |
Handle locking of the SubLattice which is delegated to its parent. More... | |
virtual void | unlock () |
virtual Bool | hasLock (FileLocker::LockType) const |
virtual void | resync () |
Resynchronize the Lattice object with the lattice file. More... | |
virtual void | flush () |
Flush the data. More... | |
virtual void | tempClose () |
Close the Lattice temporarily (if it is paged to disk). More... | |
virtual void | reopen () |
If needed, reopen a temporarily closed Lattice. More... | |
virtual Bool | hasPixelMask () const |
Does the SubLattice have a pixelmask? More... | |
virtual const Lattice< Bool > & | pixelMask () const |
Get access to the pixelmask. More... | |
virtual Lattice< Bool > & | pixelMask () |
void | setPixelMask (const Lattice< Bool > &pixelMask, Bool mayExist) |
Use the given mask as the pixelmask. More... | |
virtual const LatticeRegion * | getRegionPtr () const |
Get a pointer the region/mask object describing this sublattice. More... | |
virtual IPosition | shape () const |
Returns the shape of the SubLattice including all degenerate axes (i.e. More... | |
virtual String | name (Bool stripPath=False) const |
Return the name of the parent lattice. More... | |
virtual uInt | advisedMaxPixels () const |
This function returns the recommended maximum number of pixels to include in the cursor of an iterator. More... | |
virtual T | getAt (const IPosition &where) const |
Get or put a single element in the lattice. More... | |
virtual void | putAt (const T &value, const IPosition &where) |
virtual Bool | ok () const |
Check class internals - used for debugging. More... | |
virtual LatticeIterInterface< T > * | makeIter (const LatticeNavigator &navigator, Bool useRef) const |
This function is used by the LatticeIterator class to generate an iterator of the correct type for this Lattice. More... | |
virtual Bool | doGetSlice (Array< T > &buffer, const Slicer §ion) |
Do the actual getting of an array of values. More... | |
virtual void | doPutSlice (const Array< T > &sourceBuffer, const IPosition &where, const IPosition &stride) |
Do the actual getting of an array of values. More... | |
virtual Bool | doGetMaskSlice (Array< Bool > &buffer, const Slicer §ion) |
Get a section of the mask. More... | |
virtual IPosition | doNiceCursorShape (uInt maxPixels) const |
Get the best cursor shape. More... | |
const AxesMapping & | getAxesMap () const |
Set the axes mapping from the specification. More... | |
IPosition | positionInParent (const IPosition &subLatticePosition) const |
Convert the specified position in the sublattice to the corresponding position in the parent lattice. More... | |
void | setRegion (const Slicer &slicer) |
Set the region object using a slicer. More... | |
Protected Member Functions | |
void | setRegion (const LatticeRegion ®ion) |
Set the region object. More... | |
void | setRegion () |
void | setPtr (Lattice< T > *latticePtr, MaskedLattice< T > *maskLatPtr, Bool writableIfPossible) |
Set the various pointers needed to construct the object. More... | |
void | setAxesMap (const AxesSpecifier &) |
Set the axes mapping from the specification. More... | |
Private Member Functions | |
Bool | getRegionDataSlice (Array< Bool > &buffer, const Slicer §ion) |
Get mask data from region and mask. More... | |
Bool | getMaskDataSlice (Array< Bool > &buffer, const Slicer §ion) |
void | andMask (Array< Bool > &buffer, Bool ref, const Array< Bool > &tmpbuf) const |
And tmpbuf into buffer. More... | |
Private Attributes | |
Lattice< T > * | itsLatticePtr |
MaskedLattice< T > * | itsMaskLatPtr |
LatticeRegion | itsRegion |
Bool | itsWritable |
Bool | itsHasLattPMask |
Lattice< Bool > * | itsPixelMask |
Lattice< Bool > * | itsOwnPixelMask |
AxesSpecifier | itsAxesSpec |
AxesMapping | itsAxesMap |
A subset of a Lattice or MaskedLattice
Public interface
A SubLattice is a lattice referencing a subset of another lattice by means of a Slicer object.
It is useful when only a subset of a lattice needs to be accessed.
When the SubLattice is created from a const Lattice
object, it is not writable, thus it can only be used as an rvalue.
Using an AxesSpecifier object it is possible to remove some or all degenerate axes (i.e. axes with length 1) to get a lattice with a lower dimensionality.
Definition at line 85 of file SubLattice.h.
casacore::SubLattice< T >::SubLattice | ( | ) |
The default constructor creates a SubLattice that is useless for just about everything, except that it can be assigned to with the assignment operator.
casacore::SubLattice< T >::SubLattice | ( | const Lattice< T > & | lattice, |
AxesSpecifier | = AxesSpecifier() |
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Create a SubLattice from a Lattice.
This results in a SubLattice without a real mask.
The "const Lattice" version yields a non-writable SubLattice, while for the non-const version one has to specify if the SubLattice should be writable (if the original lattice is non-writable, the SubLattice is always set to non-writable).
Note: In the 2nd case the lattice could have been declared const, but is not to indicate it can be changed;
casacore::SubLattice< T >::SubLattice | ( | Lattice< T > & | lattice, |
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const MaskedLattice< T > & | lattice, |
AxesSpecifier | = AxesSpecifier() |
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Create a SubLattice from a MaskedLattice.
The "const MaskedLattice" version yields a non-writable SubLattice, while for the non-const version one has to specify if the SubLattice should be writable (if the original lattice is non-writable, the SubLattice is always set to non-writable).
Note: In the 2nd case the lattice could have been declared const, but is not to indicate it can be changed;
casacore::SubLattice< T >::SubLattice | ( | MaskedLattice< T > & | lattice, |
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const Lattice< T > & | lattice, |
const LatticeRegion & | region, | ||
AxesSpecifier | = AxesSpecifier() |
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Create a SubLattice from the given MaskedLattice and region.
Note that the region can be constructed from an LCRegion object or Slicer object (with an optional stride).
An exception is thrown if the lattice shape used in the region differs from the shape of the lattice.
Note: In the 2nd and 4th case the lattice could have been declared const, but is not to indicate it can be changed;
casacore::SubLattice< T >::SubLattice | ( | Lattice< T > & | lattice, |
const LatticeRegion & | region, | ||
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const MaskedLattice< T > & | lattice, |
const LatticeRegion & | region, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | MaskedLattice< T > & | lattice, |
const LatticeRegion & | region, | ||
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const Lattice< T > & | lattice, |
const Slicer & | slicer, | ||
AxesSpecifier | = AxesSpecifier() |
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Create a SubLattice from the given (Masked)Lattice and slicer.
The slicer can be strided.
An exception is thrown if the slicer exceeds the lattice shape.
Note: In the 2nd and 4th case the lattice could have been declared const, but is not to indicate it can be changed;
casacore::SubLattice< T >::SubLattice | ( | Lattice< T > & | lattice, |
const Slicer & | slicer, | ||
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const MaskedLattice< T > & | lattice, |
const Slicer & | slicer, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | MaskedLattice< T > & | lattice, |
const Slicer & | slicer, | ||
Bool | writableIfPossible, | ||
AxesSpecifier | = AxesSpecifier() |
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casacore::SubLattice< T >::SubLattice | ( | const SubLattice< T > & | other | ) |
Copy constructor (reference semantics).
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This function returns the recommended maximum number of pixels to include in the cursor of an iterator.
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And tmpbuf into buffer.
If buffer is a reference, first a copy is made.
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Can the lattice data be referenced as an array section?
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Make a copy of the object (reference semantics).
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Get a section of the mask.
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Do the actual getting of an array of values.
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Get the best cursor shape.
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Do the actual getting of an array of values.
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Flush the data.
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Get or put a single element in the lattice.
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Set the axes mapping from the specification.
Definition at line 276 of file SubLattice.h.
References casacore::SubLattice< T >::itsAxesMap.
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Get mask data from region and mask.
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Get a pointer the region/mask object describing this sublattice.
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Does the SubLattice have a pixelmask?
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Is the lattice masked? It is if its parent lattice or its region is masked.
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Is the SubLattice paged to disk?
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A SubLattice is persistent if no region is applied to the parent lattice.
That is true if the region has the same shape as the parent lattice and the region has no mask.
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Is the SubLattice writable?
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Handle locking of the SubLattice which is delegated to its parent.
It is strongly recommended to use class LatticeLocker to handle lattice locking. It also contains a more detailed explanation of the locking process.
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This function is used by the LatticeIterator class to generate an iterator of the correct type for this Lattice.
Not recommended for general use.
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Return the name of the parent lattice.
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Check class internals - used for debugging.
Should always return True
SubLattice<T>& casacore::SubLattice< T >::operator= | ( | const SubLattice< T > & | other | ) |
Assignment (reference semantics).
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Get access to the pixelmask.
An exception is thrown if the SubLattice does not have a pixelmask.
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Convert the specified position in the sublattice to the corresponding position in the parent lattice.
Definition at line 281 of file SubLattice.h.
References casacore::LatticeRegion::convert(), casacore::AxesMapping::isRemoved(), casacore::SubLattice< T >::itsAxesMap, casacore::SubLattice< T >::itsRegion, and casacore::AxesMapping::posToOld().
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If needed, reopen a temporarily closed Lattice.
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Resynchronize the Lattice object with the lattice file.
This function is only useful if no read-locking is used, ie. if the table lock option is UserNoReadLocking or AutoNoReadLocking. In that cases the table system does not acquire a read-lock, thus does not synchronize itself automatically.
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Set the axes mapping from the specification.
void casacore::SubLattice< T >::setPixelMask | ( | const Lattice< Bool > & | pixelMask, |
Bool | mayExist | ||
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Use the given mask as the pixelmask.
If another mask was already used, the new one will be used instead. It checks if its shape matches the shape of the sublattice.
If mayExist=False
, setting the pixelmask is only possible if the underlying lattice does not have a pixelmask.
If mayExist=True
, the resulting pixelmask is the AND of the given pixelmask and the pixelmask of the underlying lattice.
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Set the various pointers needed to construct the object.
One of the pointers should be zero. It takes over the pointer and deletes the object in the destructor.
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Set the region object.
It also fills in the parent pointer when the SubLattice is taken from a MaskedLattice. The default region is the entire lattice.
void casacore::SubLattice< T >::setRegion | ( | const Slicer & | slicer | ) |
Set the region object using a slicer.
Allows the region to be changed while keeping the same lattice, so that new SubLattice objects do not have to be created when one only wants to change the region of interest. Should only be called when performance is an issue; otherwise, just create a new SubLattice<T> object.
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Returns the shape of the SubLattice including all degenerate axes (i.e.
axes with a length of one).
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Close the Lattice temporarily (if it is paged to disk).
It'll be reopened automatically when needed or when reopen
is called explicitly.
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Definition at line 338 of file SubLattice.h.
Referenced by casacore::SubLattice< T >::getAxesMap(), and casacore::SubLattice< T >::positionInParent().
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Definition at line 337 of file SubLattice.h.
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Definition at line 334 of file SubLattice.h.
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Definition at line 330 of file SubLattice.h.
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Definition at line 331 of file SubLattice.h.
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Definition at line 336 of file SubLattice.h.
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Definition at line 335 of file SubLattice.h.
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Definition at line 332 of file SubLattice.h.
Referenced by casacore::SubLattice< T >::positionInParent().
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Definition at line 333 of file SubLattice.h.