public DataType getType() {
        if (data == null)
            return null;
        else
            return data.getDataType();
    }
Get the Type of the underlying AudioData to see if it's streamed or buffered.
This is a shortcut to getAudioData().getType()
<b>Warning</b>: Can return null!
@return The {@link com.jme3.audio.AudioData.DataType} of the audio node.
jme3-core/src/main/java/com/jme3/audio/AudioNode.java