Package org.apache.myfaces.flow
Class FlowHandlerImpl
- java.lang.Object
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- jakarta.faces.flow.FlowHandler
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- org.apache.myfaces.flow.FlowHandlerImpl
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- All Implemented Interfaces:
FacesListener
,SystemEventListener
,EventListener
public class FlowHandlerImpl extends FlowHandler implements SystemEventListener
- Since:
- 2.2
- Author:
- Leonardo Uribe
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Field Summary
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Fields inherited from class jakarta.faces.flow.FlowHandler
FLOW_ID_REQUEST_PARAM_NAME, NULL_FLOW, TO_FLOW_DOCUMENT_ID_REQUEST_PARAM_NAME
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Constructor Summary
Constructors Constructor Description FlowHandlerImpl()
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Method Summary
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Methods inherited from class jakarta.faces.flow.FlowHandler
getCurrentFlow
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Method Detail
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getFlow
public Flow getFlow(FacesContext context, String definingDocumentId, String id)
- Specified by:
getFlow
in classFlowHandler
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addFlow
public void addFlow(FacesContext context, Flow toAdd)
- Specified by:
addFlow
in classFlowHandler
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getCurrentFlow
public Flow getCurrentFlow(FacesContext context)
- Specified by:
getCurrentFlow
in classFlowHandler
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transition
public void transition(FacesContext context, Flow sourceFlow, Flow targetFlow, FlowCallNode outboundCallNode, String toViewId)
- Specified by:
transition
in classFlowHandler
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getFacesFlowProvider
public FacesFlowProvider getFacesFlowProvider(FacesContext facesContext)
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isActive
public boolean isActive(FacesContext context, String definingDocumentId, String id)
- Specified by:
isActive
in classFlowHandler
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getCurrentFlowScope
public Map<Object,Object> getCurrentFlowScope()
- Specified by:
getCurrentFlowScope
in classFlowHandler
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clientWindowTransition
public void clientWindowTransition(FacesContext context)
The interpretation done for this issue is this: There are two basic cases: Enter into a flow and return from a flow. - FlowHandler.TO_FLOW_DOCUMENT_ID_REQUEST_PARAM_NAME : value of the toFlowDocumentId property of the navigation case when enter into a flow OR FlowHandler.NULL_FLOW when return from a flow. - FlowHandler.FLOW_ID_REQUEST_PARAM_NAME : value of the fromOutcome property of the navigation case. According to the intention it has multiple options: 1. It can be a flowId, which means enter into a flow. 2. It can be a flow call id, which means enter into a flow. 3. It can be a flow return id, which means return from a flow. - The javadoc of NavigationCase.getToFlowDocumentId() says this: "... If this navigation case represents a flow invocation, this property is the documentId in which the flow whose id is given by the return from getFromOutcome() is defined. Implementations must override this method to return the value defined in the corresponding application configuration resources element. The base implementation returns the empty string. ..." This is consistent with the previous interpretation, but we need to include the case where toFlowDocumentId is FlowHandler.NULL_FLOW too, which is derived implicitly. The key of the trick is override fromOutcome / toFlowDocumentId in the navigation algorithm to indicate when the navigation case is entering into a flow or return from a flow. In that way, it is possible to use ConfigurableNavigationHandler.getNavigationCase(...) to know the "route" using the initial fromOutcome given in FLOW_ID_REQUEST_PARAM_NAME.- Specified by:
clientWindowTransition
in classFlowHandler
- Parameters:
context
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getLastDisplayedViewId
public String getLastDisplayedViewId(FacesContext context)
- Specified by:
getLastDisplayedViewId
in classFlowHandler
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pushReturnMode
public void pushReturnMode(FacesContext context)
- Specified by:
pushReturnMode
in classFlowHandler
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popReturnMode
public void popReturnMode(FacesContext context)
- Specified by:
popReturnMode
in classFlowHandler
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getActiveFlows
public List<Flow> getActiveFlows(FacesContext context)
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getActiveFlows
public static List<Flow> getActiveFlows(FacesContext facesContext, FlowHandler fh)
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isListenerForSource
public boolean isListenerForSource(Object source)
- Specified by:
isListenerForSource
in interfaceSystemEventListener
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processEvent
public void processEvent(SystemEvent event)
- Specified by:
processEvent
in interfaceSystemEventListener
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