java - Perspective not loading in RCP when tried more than one -

i creating rcp application. have view class newview.

public class newview extends viewpart {      private databindingcontext m_bindingcontext;     public static final string id = "com.app.editor.newview";     savenewfilebean bean = new savenewfilebean();     private styledtext text;      public newview() {     }      @override     public void createpartcontrol(composite parent) {         text = new styledtext(parent, swt.border);         m_bindingcontext = initdatabindings();     }      public string returntext(){         string textdata = bean.gettext();         return textdata;     }      @override     public void setfocus() {      }     protected databindingcontext initdatabindings() {         databindingcontext bindingcontext = new databindingcontext();         //         iobservablevalue observetexttextobservewidget = widgetproperties.text(swt.modify).observe(text);         iobservablevalue textbeanobservevalue = pojoproperties.value("text").observe(bean);         bindingcontext.bindvalue(observetexttextobservewidget, textbeanobservevalue, null, null);         //         return bindingcontext;     } } 

when running application first time, click on new menu , everything working fine. but, when trying load again clicking on new again, doesn't give error. but, doesn't load perspective also. there issue code?

thanks!

edit: new command. new calls handler newfilehandler in turn calls newview.java using below code.

public class newfilehandler extends abstracthandler {   @override  public object execute(executionevent event) throws executionexception {  switchperspectiveaction action = new switchperspectiveaction();  action.run(newfileperspective.id);     return null;   }  }  

switchperspectiveasction class

public class switchperspectiveaction extends action {  public void run(string newperspectiveid) {     if (platformui.getworkbench() != null) {         try {              platformui.getworkbench().showperspective(newperspectiveid,                     platformui.getworkbench().getactiveworkbenchwindow());         } catch (workbenchexception e) {             e.printstacktrace();         }     } }  } 

edit:

i tried code.

iworkbenchpage page = platformui.getworkbench().getactiveworkbenchwindow().getactivepage();     try {         page.showview(openfileperspective.id, "1" , iworkbenchpage.view_activate);     } catch (partinitexception e) {         // todo auto-generated catch block         e.printstacktrace();     } 

gives error.

org.eclipse.ui.partinitexception: not create view: com.app.editor.openfileperspective:1 @ org.eclipse.ui.internal.workbenchpage.busyshowview(workbenchpage.java:1275) @ org.eclipse.ui.internal.workbenchpage$14.run(workbenchpage.java:4208) @ org.eclipse.swt.custom.busyindicator.showwhile(busyindicator.java:70) @ org.eclipse.ui.internal.workbenchpage.showview(workbenchpage.java:4204) @ com.app.editor.handlers.openhandler.execute(openhandler.java:66) @ org.eclipse.ui.internal.handlers.handlerproxy.execute(handlerproxy.java:294) @ org.eclipse.ui.internal.handlers.e4handlerproxy.execute(e4handlerproxy.java:90) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source) @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source) @ java.lang.reflect.method.invoke(unknown source) @ org.eclipse.e4.core.internal.di.methodrequestor.execute(methodrequestor.java:55) @ org.eclipse.e4.core.internal.di.injectorimpl.invokeusingclass(injectorimpl.java:247) @ org.eclipse.e4.core.internal.di.injectorimpl.invoke(injectorimpl.java:229) @ org.eclipse.e4.core.contexts.contextinjectionfactory.invoke(contextinjectionfactory.java:132) @ org.eclipse.e4.core.commands.internal.handlerservicehandler.execute(handlerservicehandler.java:149) @ org.eclipse.core.commands.command.executewithchecks(command.java:499) @ org.eclipse.core.commands.parameterizedcommand.executewithchecks(parameterizedcommand.java:508) @ org.eclipse.e4.core.commands.internal.handlerserviceimpl.executehandler(handlerserviceimpl.java:210) @ org.eclipse.e4.ui.workbench.renderers.swt.handledcontributionitem.executeitem(handledcontributionitem.java:825) @ org.eclipse.e4.ui.workbench.renderers.swt.handledcontributionitem.handlewidgetselection(handledcontributionitem.java:701) @ org.eclipse.e4.ui.workbench.renderers.swt.handledcontributionitem.access$6(handledcontributionitem.java:685) @ org.eclipse.e4.ui.workbench.renderers.swt.handledcontributionitem$4.handleevent(handledcontributionitem.java:613) @ org.eclipse.swt.widgets.eventtable.sendevent(eventtable.java:84) @ org.eclipse.swt.widgets.display.sendevent(display.java:4353) @ org.eclipse.swt.widgets.widget.sendevent(widget.java:1061) @ org.eclipse.swt.widgets.display.rundeferredevents(display.java:4172) @ org.eclipse.swt.widgets.display.readanddispatch(display.java:3761) @ org.eclipse.e4.ui.internal.workbench.swt.partrenderingengine$9.run(partrenderingengine.java:1151) @ org.eclipse.core.databinding.observable.realm.runwithdefault(realm.java:332) @ org.eclipse.e4.ui.internal.workbench.swt.partrenderingengine.run(partrenderingengine.java:1032) @ org.eclipse.e4.ui.internal.workbench.e4workbench.createandrunui(e4workbench.java:148) @ org.eclipse.ui.internal.workbench$5.run(workbench.java:636) @ org.eclipse.core.databinding.observable.realm.runwithdefault(realm.java:332) @ org.eclipse.ui.internal.workbench.createandrunworkbench(workbench.java:579) @ org.eclipse.ui.platformui.createandrunworkbench(platformui.java:150) @ com.app.editor.application.start(application.java:20) @ org.eclipse.equinox.internal.app.eclipseapphandle.run(eclipseapphandle.java:196) @ org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.runapplication(eclipseapplauncher.java:134) @ org.eclipse.core.runtime.internal.adaptor.eclipseapplauncher.start(eclipseapplauncher.java:104) @ org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:380) @ org.eclipse.core.runtime.adaptor.eclipsestarter.run(eclipsestarter.java:235) @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) @ sun.reflect.nativemethodaccessorimpl.invoke(unknown source) @ sun.reflect.delegatingmethodaccessorimpl.invoke(unknown source) @ java.lang.reflect.method.invoke(unknown source) @ org.eclipse.equinox.launcher.main.invokeframework(main.java:648) @ org.eclipse.equinox.launcher.main.basicrun(main.java:603) @ org.eclipse.equinox.launcher.main.run(main.java:1465) @ org.eclipse.equinox.launcher.main.main(main.java:1438) 

showperspective doesn't if perspective open. can't use open multiple copies of same view.

if want open view use:

iworkbenchpage page = platformui.getworkbench().getactiveworkbenchwindow().getactivepage();  iviewpart viewpart = page.showview("the view id"); 

note show 1 instance of view @ time.

to close view use:

page.hideview(viewpart); 

you can show multiple copies of view using secondary id view:

page.showview("view id", "secondary id", iworkbenchpage.view_activate); 

the secondary id not have defined anywhere. needs unique each view want show.