4.47. jb:result Configuration Example

You can restrict the Bean set returned in a JavaResult by using a jb:result configuration in the Smooks configuration. In the following example configuration, we tell Smooks to only retain the order bean in the ResultSet: 
<?xml version="1.0"?>
<smooks-resource-list xmlns="http://www.milyn.org/xsd/smooks-1.1.xsd"
                      xmlns:jb="http://www.milyn.org/xsd/smooks/javabean-1.4.xsd">
 
    <!-- Capture some data from the message into the bean context... -->
    <jb:bean beanId="order" class="com.acme.Order" createOnElement="order">
        <jb:value property="orderId" data="order/@id"/>
        <jb:value property="customerNumber" data="header/customer/@number"/>
        <jb:value property="customerName" data="header/customer"/>
        <jb:wiring property="orderItems" beanIdRef="orderItems"/>
    </jb:bean>
    <jb:bean beanId="orderItems" class="java.util.ArrayList" createOnElement="order">
        <jb:wiring beanIdRef="orderItem"/>
    </jb:bean>
    <jb:bean beanId="orderItem" class="com.acme.OrderItem" createOnElement="order-item">
        <jb:value property="itemId" data="order-item/@id"/>
        <jb:value property="productId" data="order-item/product"/>
        <jb:value property="quantity" data="order-item/quantity"/>
        <jb:value property="price" data="order-item/price"/>
    </jb:bean>
 
    <!-- Only retain the "order" bean in the root of any final JavaResult. -->
    <jb:result retainBeans="order"/>
 
</smooks-resource-list>
After applying this configuration, any calls to the JavaResult.getBean(String) method for non-order Bean results will return null. This will work in cases such as the above example, because the other bean instances are wired into the order graph.
Note
Note that as of Smooks v1.2, if a JavaSource instance is supplied to the Smooks.filterSource method (as the filter Source instance), Smooks will use the JavaSource to construct the bean context associated with the ExecutionContect for that Smooks.filterSource invocation. This will mean that some of the JavaSource bean instances may be visible in the JavaResult.