QGIS API Documentation 3.27.0-Master (f261cc1f8b)
qgsprojectstorageregistry.cpp
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1/***************************************************************************
2 qgsprojectstorageregistry.cpp
3 --------------------------------------
4 Date : March 2018
5 Copyright : (C) 2018 by Martin Dobias
6 Email : wonder dot sk at gmail dot com
7 ***************************************************************************
8 * *
9 * This program is free software; you can redistribute it and/or modify *
10 * it under the terms of the GNU General Public License as published by *
11 * the Free Software Foundation; either version 2 of the License, or *
12 * (at your option) any later version. *
13 * *
14 ***************************************************************************/
15
17
18#include "qgsprojectstorage.h"
19
20
22{
23 qDeleteAll( mBackends );
24}
25
27{
28 return mBackends.value( type, nullptr );
29}
30
32{
33 for ( auto it = mBackends.constBegin(); it != mBackends.constEnd(); ++it )
34 {
35 QgsProjectStorage *storage = it.value();
36 const QString scheme = storage->type() + ':';
37 if ( uri.startsWith( scheme ) )
38 return storage;
39 }
40
41 // second chance -- use isSupportedUri to determine if a uri is supported by a backend
42 for ( auto it = mBackends.constBegin(); it != mBackends.constEnd(); ++it )
43 {
44 QgsProjectStorage *storage = it.value();
45 if ( storage->isSupportedUri( uri ) )
46 return storage;
47 }
48 return nullptr;
49}
50
51QList<QgsProjectStorage *> QgsProjectStorageRegistry::projectStorages() const
52{
53 return mBackends.values();
54}
55
57{
58 mBackends.insert( storage->type(), storage );
59}
60
62{
63 delete mBackends.take( storage->type() );
64}
QgsProjectStorage * projectStorageFromUri(const QString &uri)
Returns storage implementation if the URI matches one. Returns nullptr otherwise (it is a normal file...
void unregisterProjectStorage(QgsProjectStorage *storage)
Unregisters a storage backend and destroys its instance.
void registerProjectStorage(QgsProjectStorage *storage)
Registers a storage backend and takes ownership of it.
QgsProjectStorage * projectStorageFromType(const QString &type)
Returns storage implementation if the storage type matches one. Returns nullptr otherwise (it is a no...
QList< QgsProjectStorage * > projectStorages() const
Returns a list of registered project storage implementations.
Abstract interface for project storage - to be implemented by various backends and registered in QgsP...
virtual bool isSupportedUri(const QString &uri) const
Returns true if the specified uri is supported by the storage provider.
virtual QString type()=0
Unique identifier of the project storage type.