Visualforce error Not Serializable: Component.flow.interview

Question

i am using dynamic Visualforce component created in Apex

public with sharing class Sample3 {
    public Component.Flow.Interview flow{get;set;}
    public Sample3(){
    flow= new Component.Flow.Interview();
    flow.name='Calculator';     
    }
}

and VF page is

<apex:page controller="Sample3">
<apex:dynamicComponent componentValue="{!flow}"/>
</apex:page>

but when i open visualforce page its giving me error

Not Serializable: Component.flow.interview

As mentioned in comment i made a demo Class and VF Page

can anyone please tell How to resolve this issue ??

Answer 1

The (attempted) serialization of the not serializable component can be avoided by making the field transient:

public with sharing class Sample3 {
    private transient Component.Flow.Interview flow;
    public Component.Flow.Interview getFlow() {
        return flow;
    }
    public Sample3() {
        flow = new Component.Flow.Interview();
        flow.name = 'Calculator';
    }
}

or simpler still by not holding the value in a field at all:

public with sharing class Sample3 {
    public Component.Flow.Interview getFlow() {
        Component.Flow.Interview flow = new Component.Flow.Interview();
        flow.name = 'Calculator';
        return flow;
    }
    public Sample3() {
    }
}

For dynamic Apex components not including the component in the view state means the components do not work fully (see e.g. Field Values In Dynamic Component Not Retaining After Error); hopefully for your flow component there are no negative consequences.