Ilwis::ConnectorInterface Class Reference

The ConnectorInterface class all connectors are derived from this interface. More...

#include <connectorinterface.h>

Inheritance diagram for Ilwis::ConnectorInterface:

Public Member Functions
virtual bool	loadMetaData (IlwisObject *)
	loads the metadata and non binary information into the ilwisobject. After this method it should be a valid object More...
virtual Grid *	loadGridData (IlwisObject *)
	loadGridData loads the 2D or 3D raster data from the source into memory More...
virtual bool	loadData (IlwisObject *)
	loadData loads bulk binary data into the ilwisobject. More...
virtual bool	dataIsLoaded () const
virtual bool	store (IlwisObject *, int)
virtual bool	execute (const OperationExpression &, ExecutionContext *)
virtual bool	isReadOnly ()
	isReadOnly returns if a connector can write to a source. More...
virtual ConnectorInterface *	clone () const
	clone copies the connector for use with another object More...
virtual Resource &	source ()=0
	source returns the resource location were this connector is attached to More...
virtual QString	provider () const =0
virtual void	format (const QString &)
virtual QString	format () const
virtual bool	isValid () const
virtual bool	canUse (const Resource &) const

Detailed Description

The ConnectorInterface class all connectors are derived from this interface.

*The connector interface enumerates the methods that may be implemented by a derivative. It is unlikely that a derivative will implement all methods so a default implementation is provied. *Usualy the MetaData methods are implemented and depending on the nature of the source also one or more of the binary (Grid/table) ones is implemented.

Member Function Documentation

virtual ConnectorInterface* Ilwis::ConnectorInterface::clone ( ) const

inlinevirtual

clone copies the connector for use with another object

*A connector is dedicated to one IlwisObject only. If one needs an identical connector for whatever reason one can clone it and reuse it

Returns

a new connector

virtual bool Ilwis::ConnectorInterface::isReadOnly ( )

inlinevirtual

isReadOnly returns if a connector can write to a source.

*This return is more of the physical possibility of writing data. There is also a readonly flag at ilwisobject level but describes usualy the logical readonly status (e.g. I dont want that this will be written)

Returns

virtual bool Ilwis::ConnectorInterface::loadData ( IlwisObject *  )

inlinevirtual

loadData loads bulk binary data into the ilwisobject.

Returns

true when succesfull. If not succesful the reason can be found in the issuelogger

Reimplemented in Ilwis::CatalogConnector.

virtual Grid* Ilwis::ConnectorInterface::loadGridData ( IlwisObject *  )

inlinevirtual

loadGridData loads the 2D or 3D raster data from the source into memory

*Grid data can be of any size as the memory manager of Ilwis will swap any excess out to its disk cache. *Note that Ilwis doesnt make a difference between 2D and 3D griddata. If the local format has different storage methods for those they have to be resolved at connector level

Returns

returns the allocated grid

virtual bool Ilwis::ConnectorInterface::loadMetaData ( IlwisObject *  )

inlinevirtual

loads the metadata and non binary information into the ilwisobject. After this method it should be a valid object

Parameters

data	the ilwisobject to be initialized

Returns

bool true when succesfull. If not succesful the reason can be found in the issuelogger

Reimplemented in Ilwis::CatalogConnector.

virtual Resource& Ilwis::ConnectorInterface::source ( )

pure virtual

source returns the resource location were this connector is attached to

Returns

the url of the source

Implemented in Ilwis::IlwisObjectConnector.

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

• connectorinterface.h