How to use

getExtension

method

in

org.eclipse.ui.navigator.ICommonContentExtensionSite

public void init(ICommonContentExtensionSite site) {
  this.site = site;
  contentProvider = site.getExtension().getContentProvider();
  init((ISynchronizationScope)site.getExtensionStateModel().getProperty(ITeamContentProviderManager.P_SYNCHRONIZATION_SCOPE), 
      (ISynchronizationContext)site.getExtensionStateModel().getProperty(ITeamContentProviderManager.P_SYNCHRONIZATION_CONTEXT));
}

public void init(ICommonContentExtensionSite site) {
  ITreeContentProvider aContentProvider = site.getExtension().getContentProvider();
  if (aContentProvider instanceof ResourceModelContentProvider) {
    contentProvider = (ResourceModelContentProvider) aContentProvider;
    ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
  }
  super.init(site);
}

@Override
public void init(ICommonContentExtensionSite site) {
  this.site = site;
  contentProvider = site.getExtension().getContentProvider();
  init((ISynchronizationScope)site.getExtensionStateModel().getProperty(ITeamContentProviderManager.P_SYNCHRONIZATION_SCOPE),
      (ISynchronizationContext)site.getExtensionStateModel().getProperty(ITeamContentProviderManager.P_SYNCHRONIZATION_CONTEXT));
}

@Override
public void init(ICommonContentExtensionSite site) {
  ITreeContentProvider aContentProvider = site.getExtension().getContentProvider();
  if (aContentProvider instanceof ResourceModelContentProvider) {
    contentProvider = (ResourceModelContentProvider) aContentProvider;
    ResourcesPlugin.getWorkspace().addResourceChangeListener(this);
  }
  super.init(site);
}

public void init(ICommonContentExtensionSite commonContentExtensionSite) {
  fStateModel = commonContentExtensionSite.getExtensionStateModel();
  fContentProvider = (PackageExplorerContentProvider) commonContentExtensionSite.getExtension().getContentProvider();
  delegeteLabelProvider = createLabelProvider();
  delegeteLabelProvider.setIsFlatLayout(fStateModel
      .getBooleanProperty(Values.IS_LAYOUT_FLAT));
  fLayoutPropertyListener = new IPropertyChangeListener() {
    public void propertyChange(PropertyChangeEvent event) {
      if (Values.IS_LAYOUT_FLAT.equals(event.getProperty())) {
        if (event.getNewValue() != null) {
          boolean newValue = ((Boolean) event.getNewValue())
              .booleanValue() ? true : false;
          delegeteLabelProvider.setIsFlatLayout(newValue);
        }
      }
    }
  };
  fStateModel.addPropertyChangeListener(fLayoutPropertyListener);
}

@Override
public void init(ICommonContentExtensionSite commonContentExtensionSite) {
  fStateModel = commonContentExtensionSite.getExtensionStateModel();
  fContentProvider = (PackageExplorerContentProvider) commonContentExtensionSite.getExtension().getContentProvider();
  delegeteLabelProvider = createLabelProvider();
  delegeteLabelProvider.setIsFlatLayout(fStateModel
      .getBooleanProperty(Values.IS_LAYOUT_FLAT));
  fLayoutPropertyListener = new IPropertyChangeListener() {
    @Override
    public void propertyChange(PropertyChangeEvent event) {
      if (Values.IS_LAYOUT_FLAT.equals(event.getProperty())) {
        if (event.getNewValue() != null) {
          boolean newValue = ((Boolean) event.getNewValue())
              .booleanValue() ? true : false;
          delegeteLabelProvider.setIsFlatLayout(newValue);
        }
      }
    }
  };
  fStateModel.addPropertyChangeListener(fLayoutPropertyListener);
}

@Override
public void init(ICommonContentExtensionSite commonContentExtensionSite) {
  fStateModel = commonContentExtensionSite.getExtensionStateModel();
  fContentProvider = (PackageExplorerContentProvider) commonContentExtensionSite.getExtension().getContentProvider();
  delegeteLabelProvider = createLabelProvider();
  delegeteLabelProvider.setIsFlatLayout(fStateModel
      .getBooleanProperty(Values.IS_LAYOUT_FLAT));
  fLayoutPropertyListener = new IPropertyChangeListener() {
    @Override
    public void propertyChange(PropertyChangeEvent event) {
      if (Values.IS_LAYOUT_FLAT.equals(event.getProperty())) {
        if (event.getNewValue() != null) {
          boolean newValue = ((Boolean) event.getNewValue())
              .booleanValue() ? true : false;
          delegeteLabelProvider.setIsFlatLayout(newValue);
        }
      }
    }
  };
  fStateModel.addPropertyChangeListener(fLayoutPropertyListener);
}