Replying to myself to collect some info: Seems to be a use case for jsinterop: https://docs.google.com/document/d/10fmlEYIHcyead_4R1S5wKGs1t2I7Fnp_PaNaa7XTEk0/edit#
relevant posting: https://groups.google.com/forum/#!searchin/google-web-toolkit/library/google-web-toolkit/kfHB1R-USOk/pJMbEIFJdhkJ javaemul for java.util perhaps not sufficiently complete. teavm looks more complete. SRM uses java.io in one case to read a static data file. Would likely need to be avoided somehow. On Friday, December 18, 2015 at 9:48:30 AM UTC-5, Andreas Plesch wrote: > > Hello, > > I came across GWT when I was looking for a way to use a large java math > library on the client with javascript. GWT may be targeted as building web > apps from the ground up using java rather than porting large existing java > libraries but from what I see there have been such ports nonetheless. > > The library is called SRM and makes a lot of classes and methods available > which can be used to compute sophisticated and well defined 3d coordinate > transformations. > > Here is a typical example of how it would be used in a small application. > > import SRM.*; > > public class CdToCcConv > { > public static void main (String args[]) > { > System.out.println("*** Sample program using SRM Java API to > convert a 3D coordinate"); > System.out.println("*** from a Celestiodetic SRF to a > Celestiocentric SRF."); > > // Declare reference variables for the CD_3D and CC_3D SRFs > SRF_Celestiodetic CdSrf = null; > SRF_Celestiocentric CcSrf = null; > > try > { > // Create a Celestiodetic SRF with WGS 1984 and Identity > transformation > CdSrf = new SRF_Celestiodetic(SRM_ORM_Code.ORMCOD_WGS_1984, > > SRM_RT_Code.RTCOD_WGS_1984_IDENTITY); > > // Create a Celestiocentric SRF with WGS 1984 and Identity > transformation > CcSrf = new SRF_Celestiocentric(SRM_ORM_Code.ORMCOD_WGS_1984, > > SRM_RT_Code.RTCOD_WGS_1984_IDENTITY); > > // Create a 3D Celestiodetic coordinate with > // longitude => 10.0 degrees (note: this input > parameter is converted to radians) > // latitude => 20.0 degrees (note: this input > parameter is converted to radians) > // ellipsoidal height => 100.0 meters > Coord3D_Celestiodetic CdCoord = > > (Coord3D_Celestiodetic)CdSrf.createCoordinate3D(Math.toRadians(10.0), > > Math.toRadians(20.0), > 100.0); > > // Instantiate a 3D Celestiocentric coordinate > // This is an alternative method for instantiate a 3D > coordinate > Coord3D_Celestiocentric CcCoord = new > Coord3D_Celestiocentric(CcSrf); > > // print out the SRF parameter values and the coordinate > component values > System.out.println("CdSrf parameter => \n" + CdSrf); > System.out.println("CcSrf parameter => \n" + CcSrf); > System.out.println("CdCoord components (source) => \n" + > CdCoord); > > // convert the 3D Celestiodetic coordinate to 3D > Celestiocentric coordinate > SRM_Coordinate_Valid_Region_Code valRegion = > CcSrf.changeCoordinateSRF(CdCoord, CcCoord); > > // print out the values of the resulting 3D Celestiocentric > coordinate > System.out.println("CcCoord components (destination) => \n" + > CcCoord + " is " + valRegion); > } > catch (SrmException ex) > { > // catch SrmException and print out the error code and text. > System.out.println("Exception caught=> " + ex.what() + ", " + > ex); > } > } > } > > What I would like is use the exposed, public classes from Javascript. I > would envision javascript objects (classes) with the same name and methods > as in java. > > I have a compiled .jar archive and also the source code. It has about 60k > lines of code. It only imports java.util.* . There is no UI, just a well > defined API. > > Would it be feasible to use GWT to transpile to javascript ? If yes, how > would I go about it ? I do not want to develop a new web app but use the > library in an existing code base. I could not really find a similar example > but perhaps there is one ? > > I can provide more background if directed to what I should look for. Any > tip welcome, > > Andreas > -- You received this message because you are subscribed to the Google Groups "GWT Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-web-toolkit. For more options, visit https://groups.google.com/d/optout.
