LibraryLoader

synchronized public boolean isAvailable()

Returns whether the underlying libraries are available, loading them if necessary.

synchronized public void setLibraries(String[] libraries)

Overrides the names of the libraries to load. Must be called before any call to isAvailable.

protected abstract void loadLibrary(String name)

Should be implemented to call System.loadLibrary(name).

It's necessary for each subclass to implement this method because loadLibrary uses reflection to obtain the calling class, which is then used to obtain the class loader to use when loading the native library. If this class were to implement the method directly, and if a subclass were to have a different class loader, then loading of the native library would fail.