how can i get the stacktrace? my eclipse console does not show any errors. I
was trying to instantiate my list with an empty list if the list is null,
but the error consists:
package com.airwriting.frontend.pages.mobile;
import java.util.ArrayList;
import java.util.List;
import org.apache.tapestry5.Block;
import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.Link;
import org.apache.tapestry5.annotations.Environmental;
import org.apache.tapestry5.annotations.Import;
import org.apache.tapestry5.annotations.InjectComponent;
import org.apache.tapestry5.annotations.OnEvent;
import org.apache.tapestry5.annotations.Persist;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.corelib.components.Zone;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
import org.apache.tapestry5.EventConstants;
import com.airwriting.domain.GeoPoint;
import com.airwriting.domain.Group;
import com.airwriting.service.GeometryService;
import com.airwriting.service.data.GroupService;
import com.vividsolutions.jts.geom.Geometry;
@Import(library = {
"context:js/mobilebrowsegroups.js"
})
public class BrowseGroups {
@Persist
private List<Group> groups;
@Property
private Group group;
@Inject
private Block listBlock;
@Inject
private GroupService groupService;
@Inject
private JavaScriptSupport jsSupport;
@Inject
private Request request;
@Inject
private ComponentResources componentResources;
@Property
private boolean isLocationRetrieved;
public void setupRender() {
System.out.println("setupRender");
isLocationRetrieved = false;
}
public void afterRender(){
Link linkGetGroupsOnLocation =
componentResources.createEventLink("getGroupsOnLocation");
jsSupport.addScript("init('%s');",
linkGetGroupsOnLocation.toURI());
}
public Object onGetGroupsOnLocation(){
Double lat = Double.parseDouble( request.getParameter("lat") );
Double lng = Double.parseDouble( request.getParameter("lng") );
Geometry location = GeometryService.getPolygon(new
GeoPoint(lat, lng),
50000);
groups = groupService.getGroupsOnLocation(location);
System.out.println(groups.size());
System.out.println("ok");
return this.listBlock;
}
Object onProgressiveDisplayFromLoadingScreen(){
sleep(5000);
System.out.println("si; " + groups.size());
return this.listBlock;
}
public List<Group> getGroups(){
if (groups == null){
return new ArrayList<Group>();
}
return this.groups;
}
public static void sleep(int milis){
try {
Thread.sleep(milis);
}catch (final Exception e) {
}
}
}
JAVASCRIPT:
var urlGetGroupsOnLocation;
function init(url) {
urlGetGroupsOnLocation = url;
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
new Ajax.Request(urlGetGroupsOnLocation, {
onSuccess : finish,
parameters : 'lat=' + position.coords.latitude
+ '&lng=' +
position.coords.longitude
});
}, function(msg) {
alert ("geolocation not supported..")
});
}
}
function finish(){
}
--
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