title: Exception:java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper in PluginDevelopment
body: <p>am working with plugin creation for eclipse, in which, I need to convert JavaObjects into Json files, for which am using below specified jar files from Jackson, and its not getting any error during compilation but during runtime, below error is thrown. Also the json conversion is working fine if importing and running in a standalone java application but only annoys with error when using with View in plugin execution. Please anyone guide me on the same.</p>
  
  <p>jackson-core-2.5.4.jar
  jackson-core-2.8.3.jar</p>
  
  <p>Error thrown:</p>
  
  <pre><code>Exception:java.lang.NoClassDefFoundError: org/codehaus/jackson/map/ObjectMapper
       at HIDDEN.HIDDEN(HIDDEN:-1)
       at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:220)
       at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
       at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
       at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
       at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
       at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
       at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
       at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
       at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
       at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
       at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)
       at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
       at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)
       at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
       at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
       at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
       at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
       at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
       at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
       at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
       at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
       at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
       at org.eclipse.equinox.launcher.Main.main(Main.java:1488)
  Caused by: java.lang.ClassNotFoundException: org.codehaus.jackson.map.ObjectMapper cannot be found by com.temenos.testware_1.0.0
       at org.eclipse.osgi.internal.loader.BundleLoader.findClassInternal(BundleLoader.java:439)
       at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:352)
       at org.eclipse.osgi.internal.loader.BundleLoader.findClass(BundleLoader.java:344)
       at org.eclipse.osgi.internal.loader.ModuleClassLoader.loadClass(ModuleClassLoader.java:160)
       at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
       at HIDDEN.HIDDEN(HIDDEN:-1)
       at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:220)
       at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
       at org.eclipse.swt.widgets.Display.sendEvent(Display.java:4362)
       at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113)
       at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4180)
       at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3769)
       at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$4.run(PartRenderingEngine.java:1127)
       at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
       at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:1018)
       at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:156)
       at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:694)
       at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:337)
       at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:606)
       at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:150)
       at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:139)
       at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
       at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134)
       at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104)
       at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380)
       at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235)
       at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-2)
       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       at java.lang.reflect.Method.invoke(Method.java:498)
       at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:669)
       at org.eclipse.equinox.launcher.Main.basicRun(Main.java:608)
       at org.eclipse.equinox.launcher.Main.run(Main.java:1515)
       at org.eclipse.equinox.launcher.Main.main(Main.java:1488)
  </code></pre>
  
  <p>Import statement that i used: <code>import org.codehaus.jackson.map.ObjectMapper;</code></p>