This portlet displays a clustering of search results into categories that let users drill into search results by any value in any field.
Each facet displayed shows the number of hits within the search that match that category.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window facet-portlet-1.4.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.
