MATLAB code of editing ROIs using Java Gateway. See Discussion here: https://www.openmicroscopy.org/community/viewtopic.php?f=4&t=8666

Edit_LineData_ROIs_in_OMERO.m

%% use Java Gateway from MATLAB

host = 'xxxxxxx.xxxx.xxxxx';
userName = 'XXXXXXXX';
password = inputdlg('password:');
password = password{1};
[gateway,user,cred] = loadOmeroGateway(userName, password, host) % https://gist.github.com/kouichi-c-nakamura/c8d335bfe45ee15e3bd86771a8578596

%% Retrieve the list of ROIs attached to an image in a dataset

datasetId = 51;

import java.util.Arrays

% clazz = java.lang.Class.forName('omero.gateway.facility.BrowseFacility', ...
%     false, gateway.getClass().getClassLoader())
% 
% browse = gateway.getFacility(clazz);

browse = getGatewayFacility(gateway,'BrowseFacility')

ctx = omero.gateway.SecurityContext(user.getGroupId());

images = browse.getImagesForDatasets(ctx, Arrays.asList(int64(datasetId))) %NOTE int64() needed to pass long data
%ArrayList


thisImg = images.get(0); %omero.gateway.model.ImageData

roifac = getGatewayFacility(gateway,'ROIFacility') % https://gist.github.com/kouichi-c-nakamura/1fee6b8b33a227d47854224fa185bb94


image = thisImg;

% Retrieve the ROIs linked to an image
roiresults = roifac.loadROIs(ctx, image.getId()); %ArrayList of omero.gateway.model.ROIResult



%% Edit the relevant two LineData ROIs


dm = getGatewayFacility(gateway,'DataManagerFacility');

r = roiresults.iterator().next();

if isempty(r)
    return;%TODO
end

rois = r.getROIs();

j = rois.iterator();

k = 0;
ind = zeros(1,2);

while j.hasNext()
    k = k + 1;
    roi = j.next();
    alist = roi.getShapes(0,0);
    
    % Do something
    shape = alist.get(0);
    
    if isa(shape,'omero.gateway.model.LineData')
        % disp(methods(shape) )
        
        switch shape.getX1()
            case 15000
                assert(shape.getX2() == 15000)
                
                shape.setText('Bregma') % added Text to the LineData
                disp(k)
                ind(1) = k - 1;
            case 20900
                assert(shape.getX2() == 20900)
                
                shape.setText('Interaural') % added Text to the LineData
                disp(k)
                ind(2) = k - 1;
        end
        
        
    end
    
end

bregma = rois.get(ind(1)).getShapes(0,0).get(0);
interaural = rois.get(ind(2)).getShapes(0,0).get(0);



ss1 = bregma.getShapeSettings;
ss1.setStroke(java.awt.Color.YELLOW) % set new stroke color of the LineData

ss2 = interaural.getShapeSettings;
ss2.setStroke(java.awt.Color.YELLOW) % set new stroke color of the LineData

% now the editing is done

%% save the edited ROIs after reloading

newRoiList = java.util.ArrayList;

newRoiList.add(rois.get(ind(1)))
newRoiList.add(rois.get(ind(2)))

roifac.saveROIs(ctx,int64(image.getId),newRoiList)