How to get or create dimension Id in Inventory Dimension in AX 2012 / D365 / AX7

How to create inventDimId using Invent Dimension values

InventDim inventDim,inventDimLoc;
InventJournalTrans inventJournalTrans;

inventDim.InventLocationId = this.Warehouse;
inventDim.InventSiteId = InventLocation::find(this.Warehouse).InventSiteId;
inventJournalTrans.inventDimId = InventDim::findOrCreate(inventDim).inventDimId;