Bug 263845 [CommonNavigator] Drag/drop folder from non-Java Proj to Java Proj does copy instead of move sometimes
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/ViewerDropAdapter.java
}
        return null;
    }
    /**
     * Returns a constant describing the position of the mouse relative to the
     * target (before, on, or after the target.  
     *
     * @return one of the <code>LOCATION_* </code> constants defined in this type
     */
    protected int getCurrentLocation() {
        return currentLocation;
    }
    /**
     * Returns the current operation.
     *
     * @return a <code>DROP_*</code> constant from class <code>DND</code>
     *
     * @see DND#DROP_COPY
     * @see DND#DROP_MOVE
     * @see DND#DROP_LINK
     * @see DND#DROP_NONE
     */
    protected int getCurrentOperation() {
        return currentOperation;
    }
    /**
     * Returns the target object currently under the mouse.
     *
     * @return the current target object
     */