How to use org.eclipse.jdt.internal.ui.text.java.hover

@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
  if (fPresenterControlCreator == null)
    fPresenterControlCreator= new PresenterControlCreator(getSite());
  return fPresenterControlCreator;
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

public JavaTypeHover() {
  fProblemHover= new ProblemHover();
  fJavadocHover= new JavadocHover();
}

@Override
protected int getOrder(Annotation annotation) {
  if (isBreakpointAnnotation(annotation))
    return 1000;
  else
    return super.getOrder(annotation);
}

private JavadocBrowserInformationControlInput internalGetHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  IJavaElement[] elements= getJavaElementsAt(textViewer, hoverRegion);
  if (elements == null || elements.length == 0)
    return null;
  return getHoverInfo(elements, getEditorInputJavaElement(), hoverRegion, null);
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

  @Override
  public IConfigurationElement getConfigurationElement(Object object) {
    return ((JavaEditorTextHoverDescriptor)object).getConfigurationElement();
  }
};

  @Override
  public IInformationControl createInformationControl(Shell parent) {
    return new SourceViewerInformationControl(parent, true, fOrientation, null);
  }
};

@Override
public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) {
  String hoverInfoString= getHoverInfo(textViewer, hoverRegion);
  if (hoverInfoString == null) {
    return null;
  }
  if (fJavaElement == null) {
    return hoverInfoString;
  }
  return new JavaSourceInformationInput(fJavaElement, hoverInfoString);
}

@Override
public Object getInformation2(ITextViewer textViewer, IRegion subject) {
  if (fImplementation == null)
    return null;
  return fImplementation.getHoverInfo2(textViewer, subject, true);
}

@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
  if (fPresenterControlCreator == null)
    fPresenterControlCreator= new PresenterControlCreator();
  return fPresenterControlCreator;
}

  public IInformationControlCreator getInformationPresenterControlCreator() {
    if (fPresenterControlCreator == null)
      fPresenterControlCreator= new ControlCreator();
    return fPresenterControlCreator;
  }
}

protected int getOrder(Annotation annotation) {
  if (isBreakpointAnnotation(annotation)) 
    return 1000;
  else
    return super.getOrder(annotation);
}

private JavadocBrowserInformationControlInput internalGetHoverInfo(ITextViewer textViewer, IRegion hoverRegion) {
  IJavaElement[] elements= getJavaElementsAt(textViewer, hoverRegion);
  if (elements == null || elements.length == 0)
    return null;
  return getHoverInfo(elements, getEditorInputJavaElement(), hoverRegion, null);
}

@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
  if (fPresenterControlCreator == null)
    fPresenterControlCreator= new PresenterControlCreator(getSite());
  return fPresenterControlCreator;
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

@Override
public IInformationControlCreator getHoverControlCreator() {
  if (fHoverControlCreator == null)
    fHoverControlCreator= new HoverControlCreator(getInformationPresenterControlCreator());
  return fHoverControlCreator;
}

@Override
protected int getOrder(Annotation annotation) {
  if (isBreakpointAnnotation(annotation))
    return 1000;
  else
    return super.getOrder(annotation);
}