the jsonp response looks like
google.visualization.Query.setResponse({version:'0.6',status:'ok',sig:'2041370208',table:{cols:[{id:'coupon',label:'Coupon',type:'string',pattern:''},{id:'con',label:'Conversion',type:'number',pattern:''},{id:'convert',label:'Converted Carts',type:'number',pattern:''},{id:'displayed',label:'Displayed',type:'number',pattern:''},{id:'converted',label:'Converted',type:'number',pattern:''},{id:'status',label:'Status',type:'boolean',pattern:''}],rows:[{c:[{v:'test'},{v:0.33},{v:1.01},{v:3.0},{v:1.0},{v:false}]}]}})
just trying to get it working with spring testing framework. Thanks.
googled it and seems that the guys that develops google visualization java data source library says it is not supported for now.