Adapters for OSGi services
· Java OSGi library bundles containing classes implementing OSGi service interfaces and intended for wrapping injected OSGi services. The idea is to avoid clutter from guarding against NullPointerReference exceptions in the code using the injected services.
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 adapters-parent-1.2.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.