jQuery convert data-* attributes to lower cammel case properties

I have the following jQuery script to intialise a jQuery plugin called poshytips. I want configure the plugin using Html5 data attributes. I am repeating myself big time, can anyone come up with a better way to do this?

$('.poshytip-trigger').each(function (index) {
     var $this = $(this);
     var data = $this.data();
 
     var options = {};
 
     if (data['class-name']) {
         options.className = data['class-name'];
     }
 
     if (data['align-x']) {
         options.alignX = data['align-x'];
     }
 
     if (data['align-y']) {
         options.alignY = data['align-y'];
     }
 
     if (data['offset-y']) {
         options.offsetY = data['offset-y'];
     }
 
     if (data['offset-x']) {
         options.offsetX = data['offset-x'];
     }
 
     $this.poshytip(options);
 });
 

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