mHeadingElement.setStyleName(mParagraphElement.getStyleName());
// unregister component
Component.unregisterComponent(mParagraphElement);
// replace paragraph with heading
OdfElement parentOdfElement = (OdfElement) mParagraphElement.getParentNode();
parentOdfElement.replaceChild(mHeadingElement, mParagraphElement);
mParagraphElement = null;
// re-register component.
Component.registerComponent(this, mHeadingElement);
}
// update outline level.