i want to validate my json response from web service,before doing transition to page 2.if json String response have error code it should not go to page 2.
<view-state id="page1" view="page1.html">
<transition on="save" to="page2">
<set name="flowScope.webserviceRes" value="webserviceClass.getwebServiceRes('testdata')" />
</transition>
</view-state>
<view-state id="page2" view="page2.html">
</view-state>