Bug 122756 [Viewers] Support for TreePath based content providers
Now that the JFace tree viewer supports the notion of a tree path, it would be benefitial if this information was made available to content providers and label providers. The particular scenario that requires this is team views that include change sets. A view can display multiple change sets and a single model element may be included in multiple change sets. In 3.2, we are using the common navigator framework to allow model providers to display their models in a team operation. Having a tree path based content provider would allow the logical model display to be intermixed with change sets. Without this support, team providers would most likely need to support two views, one which shows resources and change sets and another that shows the effects of the operation on the logical model.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerFilter.java
}
    /**
     * Returns whether this viewer filter would be affected 
     * by a change to the given property of the given element.
     * <p>
     * The default implementation of this method returns <code>false</code>.
     * Subclasses should reimplement.
     * </p>
     *
     * @param element the element
     * @param property the property
     * @return <code>true</code> if the filtering would be affected,
     *    and <code>false</code> if it would be unaffected
     */
    public boolean isFilterProperty(Object element, String property) {
        return false;
    }
    /**
     * Returns whether the given element makes it through this filter.
     *
     * @param viewer the viewer
     * @param parentElement the parent element
     * @param element the element
     * @return <code>true</code> if element is included in the
     *   filtered set, and <code>false</code> if excluded
     */
    public abstract boolean select(Viewer viewer, Object parentElement,
            Object element);
}