This LEL class handles access to Lattices. More...

#include <LELLattice.h>

Inheritance diagram for casa::LELLattice< T >:

Public Member Functions
	LELLattice (const Lattice< T > &lattice)
	Constructor takes lattice to fetch from it.
	LELLattice (const MaskedLattice< T > &lattice)
	~LELLattice ()
	Destructor does nothing.
virtual void	eval (LELArray< T > &result, const Slicer &section) const
	Evaluate the expression; this means get the chunk of the lattice.
virtual void	evalRef (LELArrayRef< T > &result, const Slicer &section) const
virtual LELScalar< T >	getScalar () const
	Getting a scalar value is not possible (throws exception).
virtual Bool	prepareScalarExpr ()
	Do further preparations (e.g.
virtual String	className () const
	Get class name.
virtual Bool	lock (FileLocker::LockType, uInt nattempts)
	Handle locking/syncing of a lattice in a lattice expression.
virtual void	unlock ()
virtual Bool	hasLock (FileLocker::LockType) const
virtual void	resync ()
Private Attributes
MaskedLattice< T > *	pLattice_p

Detailed Description

template<class T>
class casa::LELLattice< T >

This LEL class handles access to Lattices.

Intended use:

Internal

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Prerequisite

Etymology

This derived LEL letter class handles access to the pixels in a Lattice

Synopsis

This LEL letter class is derived from LELInterface. It is used to construct LEL objects that access the pixels in a Lattice. It works with Lattices of type Float,Double,Complex,DComplex and Bool.

A description of the implementation details of the LEL classes can be found in Note 216

Example

Examples are not very useful as the user would never use these classes directly. Look in LatticeExprNode.cc to see how it invokes these classes. An example of how the user would indirectly use this class (through the envelope) is:

    IPosition shape(2,5,10);
    ArrayLattice<Float> x(shape); x.set(1.0);
    ArrayLattice<Float> y(shape); 
    y.copyData(x);                 // y = x