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qgsprovidermetadata.cpp
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qgsprovidermetadata.cpp
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/***************************************************************************
qgsprovidermetadata.cpp - Metadata class for
describing a data provider.
-------------------
begin : Sat Jan 10 2004
copyright : (C) 2004 by Gary E.Sherman
email : sherman at mrcc.com
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "qgsprovidermetadata.h"
#include "qgsdataprovider.h"
#include "qgsmaplayer.h"
#include "qgsexception.h"
#include "qgsabstractdatabaseproviderconnection.h"
QgsProviderMetadata::QgsProviderMetadata( QString const &key,
QString const &description,
QString const &library )
: mKey( key )
, mDescription( description )
, mLibrary( library )
{}
QgsProviderMetadata::QgsProviderMetadata( const QString &key, const QString &description, const CreateDataProviderFunction &createFunc )
: mKey( key )
, mDescription( description )
, mCreateFunction( createFunc )
{}
QgsProviderMetadata::~QgsProviderMetadata()
{
qDeleteAll( mProviderConnections );
}
QString QgsProviderMetadata::key() const
{
return mKey;
}
QString QgsProviderMetadata::description() const
{
return mDescription;
}
QgsProviderMetadata::ProviderMetadataCapabilities QgsProviderMetadata::capabilities() const
{
return QgsProviderMetadata::ProviderMetadataCapabilities();
}
QgsProviderMetadata::ProviderCapabilities QgsProviderMetadata::providerCapabilities() const
{
return QgsProviderMetadata::ProviderCapabilities();
}
QString QgsProviderMetadata::library() const
{
return mLibrary;
}
QgsProviderMetadata::CreateDataProviderFunction QgsProviderMetadata::createFunction() const
{
return mCreateFunction;
}
void QgsProviderMetadata::initProvider()
{
}
void QgsProviderMetadata::cleanupProvider()
{
}
QString QgsProviderMetadata::filters( FilterType )
{
return QString();
}
QList<QgsMeshDriverMetadata> QgsProviderMetadata::meshDriversMetadata()
{
return QList<QgsMeshDriverMetadata>();
}
int QgsProviderMetadata::priorityForUri( const QString & ) const
{
return 0;
}
QList<QgsMapLayerType> QgsProviderMetadata::validLayerTypesForUri( const QString & ) const
{
return QList<QgsMapLayerType>();
}
bool QgsProviderMetadata::uriIsBlocklisted( const QString & ) const
{
return false;
}
QgsDataProvider *QgsProviderMetadata::createProvider( const QString &uri,
const QgsDataProvider::ProviderOptions &options,
QgsDataProvider::ReadFlags flags )
{
if ( mCreateFunction )
{
return mCreateFunction( uri, options, flags );
}
return nullptr;
}
void QgsProviderMetadata::setBoolParameter( QVariantMap &uri, const QString ¶meter, const QVariant &value )
{
if ( value.toString().compare( QStringLiteral( "yes" ), Qt::CaseInsensitive ) == 0 ||
value.toString().compare( QStringLiteral( "1" ), Qt::CaseInsensitive ) == 0 ||
value.toString().compare( QStringLiteral( "true" ), Qt::CaseInsensitive ) == 0 )
{
uri[ parameter ] = true;
}
else if ( value.toString().compare( QStringLiteral( "no" ), Qt::CaseInsensitive ) == 0 ||
value.toString().compare( QStringLiteral( "0" ), Qt::CaseInsensitive ) == 0 ||
value.toString().compare( QStringLiteral( "false" ), Qt::CaseInsensitive ) == 0 )
{
uri[ parameter ] = false;
}
}
bool QgsProviderMetadata::boolParameter( const QVariantMap &uri, const QString ¶meter, bool defaultValue )
{
if ( uri.value( parameter, QString() ).toString().compare( QStringLiteral( "yes" ), Qt::CaseInsensitive ) == 0 ||
uri.value( parameter, QString() ).toString().compare( QStringLiteral( "1" ), Qt::CaseInsensitive ) == 0 ||
uri.value( parameter, QString() ).toString().compare( QStringLiteral( "true" ), Qt::CaseInsensitive ) == 0 )
{
return true;
}
else if ( uri.value( parameter, QString() ).toString().compare( QStringLiteral( "no" ), Qt::CaseInsensitive ) == 0 ||
uri.value( parameter, QString() ).toString().compare( QStringLiteral( "0" ), Qt::CaseInsensitive ) == 0 ||
uri.value( parameter, QString() ).toString().compare( QStringLiteral( "false" ), Qt::CaseInsensitive ) == 0 )
{
return false;
}
return defaultValue;
}
QVariantMap QgsProviderMetadata::decodeUri( const QString & ) const
{
return QVariantMap();
}
QString QgsProviderMetadata::encodeUri( const QVariantMap & ) const
{
return QString();
}
QgsVectorLayerExporter::ExportError QgsProviderMetadata::createEmptyLayer(
const QString &, const QgsFields &,
QgsWkbTypes::Type, const QgsCoordinateReferenceSystem &,
bool, QMap<int, int> &,
QString &errorMessage, const QMap<QString, QVariant> * )
{
errorMessage = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "createEmptyLayer" ) );
return QgsVectorLayerExporter::ExportError::ErrProviderUnsupportedFeature;
}
QgsRasterDataProvider *QgsProviderMetadata::createRasterDataProvider(
const QString &, const QString &,
int, Qgis::DataType, int,
int, double *,
const QgsCoordinateReferenceSystem &,
const QStringList & )
{
return nullptr;
}
bool QgsProviderMetadata::createMeshData(
const QgsMesh &,
const QString,
const QString &,
const QgsCoordinateReferenceSystem & ) const
{
return false;
}
QList<QPair<QString, QString> > QgsProviderMetadata::pyramidResamplingMethods()
{
return QList<QPair<QString, QString> >();
}
QList<QgsDataItemProvider *> QgsProviderMetadata::dataItemProviders() const
{
return QList<QgsDataItemProvider *>();
}
int QgsProviderMetadata::listStyles( const QString &, QStringList &, QStringList &,
QStringList &, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "listStyles" ) );
return -1;
}
QString QgsProviderMetadata::getStyleById( const QString &, QString, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "getStyleById" ) );
return QString();
}
bool QgsProviderMetadata::deleteStyleById( const QString &, QString, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "deleteStyleById" ) );
return false;
}
bool QgsProviderMetadata::saveStyle( const QString &, const QString &, const QString &, const QString &,
const QString &, const QString &, bool, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "saveStyle" ) );
return false;
}
QString QgsProviderMetadata::loadStyle( const QString &, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "loadStyle" ) );
return QString();
}
bool QgsProviderMetadata::saveLayerMetadata( const QString &, const QgsLayerMetadata &, QString & )
{
throw QgsNotSupportedException( QObject::tr( "Provider %1 does not support writing layer metadata" ).arg( key() ) );
}
bool QgsProviderMetadata::createDb( const QString &, QString &errCause )
{
errCause = QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "createDb" ) );
return false;
}
QgsTransaction *QgsProviderMetadata::createTransaction( const QString & )
{
return nullptr;
}
QMap<QString, QgsAbstractProviderConnection *> QgsProviderMetadata::connections( bool cached )
{
Q_UNUSED( cached );
throw QgsProviderConnectionException( QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "connections" ) ) );
}
QMap<QString, QgsAbstractDatabaseProviderConnection *> QgsProviderMetadata::dbConnections( bool cached )
{
return connections<QgsAbstractDatabaseProviderConnection>( cached ) ;
}
QgsAbstractProviderConnection *QgsProviderMetadata::findConnection( const QString &name, bool cached )
{
const QMap<QString, QgsAbstractProviderConnection *> constConns { connections( cached ) };
const QStringList constKeys { constConns.keys( ) };
for ( const QString &key : constKeys )
{
if ( key == name )
{
return constConns.value( key );
}
}
return nullptr;
}
QgsAbstractProviderConnection *QgsProviderMetadata::createConnection( const QString &name )
{
Q_UNUSED( name );
throw QgsProviderConnectionException( QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "connection" ) ) );
}
QgsAbstractProviderConnection *QgsProviderMetadata::createConnection( const QString &uri, const QVariantMap &configuration )
{
Q_UNUSED( configuration );
Q_UNUSED( uri );
throw QgsProviderConnectionException( QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "connection" ) ) );
}
void QgsProviderMetadata::deleteConnection( const QString &name )
{
Q_UNUSED( name );
throw QgsProviderConnectionException( QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "deleteConnection" ) ) );
}
void QgsProviderMetadata::saveConnection( const QgsAbstractProviderConnection *connection, const QString &name )
{
Q_UNUSED( connection )
Q_UNUSED( name )
throw QgsProviderConnectionException( QObject::tr( "Provider %1 has no %2 method" ).arg( key(), QStringLiteral( "saveConnection" ) ) );
}
///@cond PRIVATE
void QgsProviderMetadata::saveConnectionProtected( const QgsAbstractProviderConnection *conn, const QString &name )
{
const bool isNewConnection = !connections().contains( name );
conn->store( name );
mProviderConnections.clear();
if ( !isNewConnection )
emit connectionChanged( name );
else
emit connectionCreated( name );
}
///@endcond
template<typename T>
QMap<QString, T *> QgsProviderMetadata::connections( bool cached )
{
QMap<QString, T *> result;
const auto constConns { connections( cached ) };
const QStringList constConnKeys { constConns.keys() };
for ( const auto &c : constConnKeys )
{
T *casted { static_cast<T *>( constConns.value( c ) ) };
if ( casted )
{
result.insert( c, casted );
}
}
return result;
}
QgsMeshDriverMetadata::QgsMeshDriverMetadata() = default;
QgsMeshDriverMetadata::QgsMeshDriverMetadata( const QString &name, const QString &description, const MeshDriverCapabilities &capabilities, const QString &writeDatasetOnfileSuffix )
: mName( name ), mDescription( description ), mCapabilities( capabilities ), mWriteDatasetOnFileSuffix( writeDatasetOnfileSuffix )
{
}
QgsMeshDriverMetadata::MeshDriverCapabilities QgsMeshDriverMetadata::capabilities() const
{
return mCapabilities;
}
QString QgsMeshDriverMetadata::name() const
{
return mName;
}
QString QgsMeshDriverMetadata::description() const
{
return mDescription;
}
QString QgsMeshDriverMetadata::writeDatasetOnFileSuffix() const
{
return mWriteDatasetOnFileSuffix;
}