void QgsVectorLayerEditBuffer::updateFields( QgsFields& fields )
{
// delete attributes from the higher indices to lower indices
for ( int i = mDeletedAttributeIds.count() - 1; i >= 0; --i )
{
fields.remove( mDeletedAttributeIds[i] );
}
// add new fields
for ( int i = 0; i < mAddedAttributes.count(); ++i )
{
fields.append( mAddedAttributes[i], QgsFields::OriginEdit, i );
}
// rename fields
QgsFieldNameMap::const_iterator renameIt = mRenamedAttributes.constBegin();
for ( ; renameIt != mRenamedAttributes.constEnd(); ++renameIt )
{
fields[ renameIt.key()].setName( renameIt.value() );
}
}
bool QgsMemoryProvider::renameAttributes( const QgsFieldNameMap& renamedAttributes )
{
QgsFieldNameMap::const_iterator renameIt = renamedAttributes.constBegin();
bool result = true;
for ( ; renameIt != renamedAttributes.constEnd(); ++renameIt )
{
int fieldIndex = renameIt.key();
if ( fieldIndex < 0 || fieldIndex >= mFields.count() )
{
result = false;
continue;
}
if ( mFields.indexFromName( renameIt.value() ) >= 0 )
{
//field name already in use
result = false;
continue;
}
mFields[ fieldIndex ].setName( renameIt.value() );
}
return result;
}