loading mapscript in java error

[Umberto Nicoletti]

On Tue, 2004-11-09 at 03:00, dbarron wrote:
> Got the mapscript library to load - but now I have yet another error.  Got
> library to load by doing the following:
>
> - commented out the following entry in the <src-root>/mapscript/swiginc/map.i
> file - any ideas why the map.i file contains this entry?  maybe it needs to
> be modified?
>

I think Sean is more informed than me but this has probably to do with
compile flags.
The same happened to me once when I built mapscript without OWS support.


>   int saveQueryAsGML(char *filename) {
>     return msGMLWriteQuery(self, filename);
>   }
>
> - rebuilt the java source files using swig command
>
>   swig -java -v -package mapscript mapscript.i
>

I think you can use 'make interface' instead

> - rebuilt the mapscript.jar and libmapscript.so files
> - copied the mapscript.jar file to the /usr/local/jdk1.5.0/jre/lib/ext/
> directory

It is probably not a good idea to copy the jar file over there.
Keep it in a local directory and set CLASSPATH accordingly, at least
until we don't get these issues sorted out.

>
> Now when I try to run the following little java app to test:
>
>  import java.io.*;
>  import edu.umn.gis.mapscript.*;
>
>  public class MapScriptTest {
>
>    public static void main(String[] args) throws IOException {
>       System.out.println("loading mapscript library...");
>       System.loadLibrary("mapscript");
>       System.out.println("mapscript library LOADED...");
>       mapObj  map;
>       imageObj image;
>
>       map=new mapObj("/home/dbarron/mapserver-test/china.map");
>       System.out.println("Created new mapObj()...");
>       image=map.draw();
>       image.save("china.png",map);
>
>    }
>  }
>
> I get the following output and exception:
>
> loading mapscript library...
> mapscript library LOADED...
> Exception in thread "main" java.lang.NoClassDefFoundError:
> edu/umn/gis/mapscript/mapObj (wrong name: mapscript/mapObj)
>         at java.lang.ClassLoader.defineClass1(Native Method)
>         at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
>         at
> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124)
>         at java.net.URLClassLoader.defineClass(URLClassLoader.java:260)
>         at java.net.URLClassLoader.access$100(URLClassLoader.java:56)
>         at java.net.URLClassLoader$1.run(URLClassLoader.java:195)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:299)
>         at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:268)
>         at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
>         at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
>         at MapScriptTest.main(MapScriptTest.java:14)
>
> I will continue to work through it - but wanted to see if either of you had
> any ideas on this?
>

java simply cannot find the mapObj. But the 'wrong name' error looks
strange.
Have you run the tests that come with mapscript ('make test')?

Then what about telling us what platform you running on?

Please forward your previous email to the list for others to benefit.

HTH,
Umberto

> Thanks,
>
> Dan
>
>
> On Monday 08 November 2004 10:30, dbarron wrote:
> > Umberto,
> >
> > Thanks for the suggestions!
> >
> > The error in full is below.  The test app does see the library and tries to
> > load it - it just has an error within the library itself.  I used the
> > straight beta2 release as Sean suggested.  It seems like the
> > java/libmapscript.so compile is not loading in the source that holds the
> > GML functionality - that's my guess anyway.  I do see the mapgml.c file get
> > compiled into mapserv.exe - that defines the msGMLWriteQuery method - but
> > why the java/libmapscript.so compile does not get it too, I do not know at
> > this point.  I'll see if I can get it to work today.
> >
> > loading mapscript library...
> > Exception in thread "main"
> > java.lang.UnsatisfiedLinkError: /usr/local/lib/special/libmapscript.so:
> > /usr/local/lib/special/libmapscript.so: undefined symbol: msGMLWriteQuery
> >         at java.lang.ClassLoader$NativeLibrary.load(Native Method)
> >         at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1751)
> >         at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1676)
> >         at java.lang.Runtime.loadLibrary0(Runtime.java:822)
> >         at java.lang.System.loadLibrary(System.java:992)
> >         at MapScriptTest.main(MapScriptTest.java:8)
> >
> > Dan