InvocationTargetException while using Constants

[Robert]

Hi. When I decided to add multi language support to my GWT project, using Constants interface, GWT designer started to show java.lang.reflect.InvocationTargetException. Now it is impossible to browse whole project using GWT designer. While line of code was added to my widget: AppConstants constants = AppConstants)GWT.create(AppConstants.class) it was not possible to see graphical design of project starting from the level of parent for current widget. Is there some way to use Constants interface and keep GTW designer working correctly in every view?

[Eric Clayberg]

Hi. When I decided to add multi language support to my GWT project, using Constants interface, GWT designer started to show java.lang.reflect.InvocationTargetException.

The name of an exception by itself is not very useful. We need to see a test case and your complete Eclipse ".log" file.

Is there some way to use Constants interface and keep GTW designer working correctly in every view?

Yes. Instructions for internationalizing a GWT application are available here.

[Robert]

Hi. Tutorial which you showed works fine but I still have the same problem. When there is following line in my widget :private static final AppConstants CONSTANTS = (AppConstants) GWT.create(AppConstants.class) - it is possible to view current window with designer. It is not possible to browse all other coposite widgets which use widget with this declaration.



Example code:



import java.util.ArrayList;
import java.util.List;

import com.bitcomp.gwt.client.container.NewsItem;
import com.bitcomp.gwt.client.container.PropertiesData;
import com.bitcomp.gwt.client.util.FormatDate;
import com.google.gwt.core.client.GWT;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ClickListener;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;

public class CalendarPanel extends Composite implements ClickListener{

private static final AppConstants CONSTANTS = (AppConstants) GWT.create(AppConstants.class);

private DesktopCalendarPanel desktopCalendarPanel;
private VerticalPanel verticalPanel;
private CalendarNewsPanel calendarNewsPanel;
private static CalendarPanel singleton;
private static AddCalendarEventsDialog dlgAdd;
private static CalendarEventsDialog dlgUpdate;
private static RemoveEventYesNoDialog dlgRemoveYesNo;
private static InfoDialog dlgNoMessageToDelete;
private static InfoDialog dlgNoMessageToUpdate;

PropertiesData properties;
final Button updateButton;
final Button addButton;
final Button removeButton;

public CalendarPanel(PropertiesData properties) {
super();


singleton = this;

this.properties = properties;

dlgAdd = new AddCalendarEventsDialog(this.properties);
dlgUpdate = new UpdateCalendarEventsDialog(this.properties);
dlgRemoveYesNo = new RemoveEventYesNoDialog(this.properties);
dlgNoMessageToDelete = new InfoDialog("No event selected to delete");
dlgNoMessageToUpdate = new InfoDialog("No event selected to update");

verticalPanel = new VerticalPanel();

final Label calendarLabel = new Label("Calendar");
verticalPanel.add(calendarLabel);


desktopCalendarPanel = new DesktopCalendarPanel(this.properties);


verticalPanel.add(desktopCalendarPanel);


final Label eventsLabel = new Label("Events");
verticalPanel.add(eventsLabel);


verticalPanel.setWidth("100%");


FormatDate fd = new FormatDate();

calendarNewsPanel = new CalendarNewsPanel(fd.getCurrentDateForDatabase("."), properties);



verticalPanel.add(calendarNewsPanel);
verticalPanel.setCellVerticalAlignment(calendarNewsPanel, HasVerticalAlignment.ALIGN_BOTTOM);
calendarNewsPanel.setVisible(true);

HorizontalPanel horizontalButtonsPanel = new HorizontalPanel();

verticalPanel.add(horizontalButtonsPanel);
horizontalButtonsPanel.setSpacing(3);

removeButton = new Button();
horizontalButtonsPanel.add(removeButton);
removeButton.addClickListener(new ClickListener() {
public void onClick(Widget sender) {
}
});
removeButton.setText("Remove");
removeButton.addClickListener(this);

updateButton = new Button();
updateButton.addClickListener(this);

horizontalButtonsPanel.add(updateButton);

updateButton.setText("Update");


addButton = new Button();
addButton.addClickListener(this);

horizontalButtonsPanel.add(addButton);

addButton.setText("Add");


initWidget(verticalPanel);

}

/**
* Gets the singleton CalendarDesktopPanel instance.
*/
public static CalendarPanel get() {
return singleton;
}

//called with date in dbformat
public void changeDate(String date){

//save current calendar date in properties (dd/mm/yyyy format)
FormatDate fd = new FormatDate();
properties.setCalendarDate(fd.formatForDatabase(date, "."));
properties.setCurrentCalendarId("");

int calendarIndex = verticalPanel.getWidgetIndex(calendarNewsPanel);

calendarNewsPanel.removeFromParent();
calendarNewsPanel = new CalendarNewsPanel(date, properties);
verticalPanel.add(calendarNewsPanel);

verticalPanel.insert(calendarNewsPanel, calendarIndex);
}

/**
* <b>getDate()</b><br>
* Get date in calendar format.<br>
*/
public String getDate(){

return properties.getCalendarDate();
}

public void refreshCalendarNewsPanel(){

FormatDate fd = new FormatDate();
int calendarIndex = verticalPanel.getWidgetIndex(calendarNewsPanel);

calendarNewsPanel.removeFromParent();
calendarNewsPanel = new CalendarNewsPanel(fd.formatForDatabase(properties.getCalendarDate(), "."), properties);
verticalPanel.add(calendarNewsPanel);

verticalPanel.insert(calendarNewsPanel, calendarIndex);

}

public void refreshCalendar(){

desktopCalendarPanel.loadFromDb();

}

public void onClick(Widget sender) {

if (sender == this.addButton) {

NewsItem ni = new NewsItem();

int left = (Window.getClientWidth() - 400) / 2;
int top = (Window.getClientHeight() - 200) / 2;
dlgAdd.setText("Add new event");
dlgAdd.setPopupPosition(left, top);
dlgAdd.setDefaultDate(getDate());
dlgAdd.setDefaultText(ni);
dlgAdd.show();

} else if (sender == this.updateButton){



if (!properties.getCurrentCalendarId().equals("")){

NewsItem ni = new NewsItem();
ni = MainDesktopPanel.get().getMessage();

int left = (Window.getClientWidth() - 400) / 2;
int top = (Window.getClientHeight() - 200) / 2;
dlgUpdate.setText("Update selected event");
dlgUpdate.setPopupPosition(left, top);
dlgUpdate.setDefaultDate(getDate());
dlgUpdate.setDefaultText(ni);
dlgUpdate.show();

}else{

int left = (Window.getClientWidth() - 280) / 2;
int top = (Window.getClientHeight() - 100) / 2;
dlgNoMessageToUpdate.setText("Dialog");
dlgNoMessageToUpdate.setPopupPosition(left, top);
dlgNoMessageToUpdate.show();

}
}else if (sender == this.removeButton){

if (!properties.getCurrentCalendarId().equals("")){

int left = (Window.getClientWidth() - 280) / 2;
int top = (Window.getClientHeight() - 100) / 2;
dlgRemoveYesNo.setText("Dialog");
dlgRemoveYesNo.setPopupPosition(left, top);
dlgRemoveYesNo.show();

}else{

int left = (Window.getClientWidth() - 280) / 2;
int top = (Window.getClientHeight() - 100) / 2;
dlgNoMessageToDelete.setText("Dialog");
dlgNoMessageToDelete.setPopupPosition(left, top);
dlgNoMessageToDelete.show();


}

}


}
}

Eclipse log:

!ENTRY com.swtdesigner 4 4 2007-02-09 11:07:33.925
!MESSAGE Designer internal error [6.1.0.20070201202821]: com.swtdesigner.properties.PropertyException: org.apache.commons.lang.exception.NestableError: Exception during loading of class com.bitcomp.gwt.client.ui.AppConstants
!STACK 0
org.apache.commons.lang.exception.NestableError: com.swtdesigner.properties.PropertyException: org.apache.commons.lang.exception.NestableError: Exception during loading of class com.bitcomp.gwt.client.ui.AppConstants
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:56)
at com.swtdesigner.model.JavaInfo.notifyPropertyChanged(JavaInfo.java:5446)
at com.swtdesigner.model.JavaInfo.notifyPropertyChanged(JavaInfo.java:5428)
at com.swtdesigner.gef.common.property.DesignerEditorPropertyComposite.handleRootNodeSelected(DesignerEditorPropertyComposite.java:588)
at com.swtdesigner.gef.common.property.DesignerEditorPropertyComposite.updatePropertyComposite(DesignerEditorPropertyComposite.java:789)
at com.swtdesigner.gef.DesignerEditor.parseCompilationUnit(DesignerEditor.java:1094)
at com.swtdesigner.gef.DesignerEditor.refreshDesignView(DesignerEditor.java:1144)
at com.swtdesigner.gef.DesignerEditor$14.widgetSelected(DesignerEditor.java:891)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:90)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:336)
at org.eclipse.core.launcher.Main.basicRun(Main.java:280)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)
Caused by: com.swtdesigner.properties.PropertyException: org.apache.commons.lang.exception.NestableError: Exception during loading of class com.bitcomp.gwt.client.ui.AppConstants
at com.swtdesigner.gwt.model.widgets.panel.ThisCompositeInfo.createGUIComponent(ThisCompositeInfo.java:182)
at com.swtdesigner.model.JavaInfo$19.execute(JavaInfo.java:5451)
at com.swtdesigner.model.swing.properties.custom.DesignTimeHelper.execute(DesignTimeHelper.java:54)
... 30 more
Caused by: org.apache.commons.lang.exception.NestableError: Exception during loading of class com.bitcomp.gwt.client.ui.AppConstants
at com.swtdesigner.gwt.loader.GWTClassLoader.findClass(GWTClassLoader.java:118)
at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at com.bitcomp.gwt.client.ui.CalendarPanel.<clinit>(CalendarPanel.java:25)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
at com.swtdesigner.model.swt.widgets.ConstructorSourcePropertiesHelper.createObject(ConstructorSourcePropertiesHelper.java:243)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.createWidgetInstance(UIObjectInfo.java:240)
at com.swtdesigner.gwt.model.widgets.panel.CompositeInfo.createWidgetInstance(CompositeInfo.java:42)
at com.swtdesigner.gwt.model.widgets.UIObjectInfo.createWidget(UIObjectInfo.java:214)
at com.swtdesigner.gwt.model.widgets.WidgetInfo.createWidget(WidgetInfo.java:164)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.createWidget(AbstractContainerInfo.java:174)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.createChildrenWidgets(AbstractContainerInfo.java:194)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.createWidget(AbstractContainerInfo.java:175)
at com.swtdesigner.gwt.model.widgets.panel.HTMLTableInfo.createWidget(HTMLTableInfo.java:85)
at com.swtdesigner.gwt.model.widgets.panel.FlexTableInfo.createWidget(FlexTableInfo.java:96)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.createChildrenWidgets(AbstractContainerInfo.java:194)
at com.swtdesigner.gwt.model.widgets.panel.AbstractContainerInfo.createWidget(AbstractContainerInfo.java:175)
at com.swtdesigner.gwt.model.widgets.panel.ThisCompositeInfo.createWidget(ThisCompositeInfo.java:187)
at com.swtdesigner.gwt.model.widgets.panel.ThisCompositeInfo.createGUIComponent(ThisCompositeInfo.java:179)
... 32 more
Caused by: java.util.MissingResourceException: Can't find resource for bundle java.util.PropertyResourceBundle, key __marker_method
at java.util.ResourceBundle.getObject(ResourceBundle.java:326)
at java.util.ResourceBundle.getString(ResourceBundle.java:286)
at com.swtdesigner.gwt.loader.GWTDumps.dumpConstants(GWTDumps.java:74)
at com.swtdesigner.gwt.loader.GWTClassLoader.findClass(GWTClassLoader.java:111)
... 54 more

[Eric Clayberg]

Try it again now with the latest GWT Designer build.