shoppingCartResolver

gistfile1.xml

<spring:bean name="shoppingCartResolver"
    class="org.mule.modules.riak.mel.ExpressionConflictResolver"
    init-method="initialise" p:deserializer-ref="jsonToShoppingCart"
    p:serializer-ref="objectToJson">
    <spring:property name="expression">
        <spring:value><![CDATA[
            resolvedCartItems = [:];

            foreach (cart : siblings) {
                foreach (item : cart.items) {
                    existingItem = resolvedCartItems[item.sku];
                    if (existingItem == null || existingItem.quantity < item.quantity) {
                        resolvedCartItems.put(item.sku, item);
                    }
                }
            }

          resolved = siblings[0];
          resolved.items = resolvedCartItems.values();
          resolved;
        ]]></spring:value>
    </spring:property>
</spring:bean>