gistfile1.java

def list = {
    [:]
}

def renderList = {
    params.max = Math.min(params.max ? params.int('max') : 10, 100)
    [productIds: Product.list(params)*.id, productInstanceTotal: Product.count()]
}
	
def renderProduct = {
    [productInstance: Product.get(params.id),productImage: (params.list('color')[0]?:'white')+".png",
        colors:['yellow','red','green','blue']]
}