Package de.xima.fc.workflow.processor.logic.analysis

Class FallbackExecutionAnalyzer

java.lang.Object

de.xima.fc.workflow.processor.logic.analysis.FallbackExecutionAnalyzer

All Implemented Interfaces:

IWorkflowNodeFlowAnalyzer<Object>

public final class FallbackExecutionAnalyzer
extends Object
implements IWorkflowNodeFlowAnalyzer<Object>

Fallback execution analyzer when no logic handler could be found for a node. Attempts to supply a somewhat sane default that does not break the rest of the workflow, but no guarantees are made as to what this returns.

Since:

7.0.0

Author:

XIMA MEDIA GmbH

Method Summary

Modifier and Type	Method	Description
<TElement extends IWorkflowNodeTypeProviding & IActiveFlagProviding> IFlowGraphEndPoints	createFlowGraph(ICreateFlowGraphParams<Object,TElement> params)	This method is used to create the flow graph that represents the control flow of a workflow task, and to determine the end points of the node when executed.
static <TData> IWorkflowNodeFlowAnalyzer<TData>	getInstance()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

getInstance

public static <TData>
IWorkflowNodeFlowAnalyzer<TData> getInstance()

Type Parameters:

TData - Type of the workflow element's properties model.

Returns:

The immutable instance of the fallback execution analyzer.

createFlowGraph

public <TElement extends IWorkflowNodeTypeProviding & IActiveFlagProviding>
IFlowGraphEndPoints createFlowGraph(ICreateFlowGraphParams<Object,TElement> params)
                             throws WorkflowAnalysisException

Description copied from interface: IWorkflowNodeFlowAnalyzer

This method is used to create the flow graph that represents the control flow of a workflow task, and to determine the end points of the node when executed.

The flow graph is a directed graph. Each node in the control flow graph corresponds to a WorkflowNode The graph has an edge from node1 to node2 iff it is possible that node1 transfers control directly to node2; i.e. iff there exists at least one code path where node2 immediately succeeds node1.

Regarding end point, see the documentation of IFlowGraphEndPoints.getNormalEndPoints() and IFlowGraphEndPoints.getThrowingEndPoints() for more details.

This method is not pure and must have side-effects. It is responsible for

1. calling createFlowGraph (or one of its variants) on all of its children (if applicable);
2. calling connect (or one of its variants); and
3. returning the set of normal and throwing end points of the node.

This method must return the set of all nodes (including the children, grand-children etc. of this node) that represent the normal and throwing end points when the node is executed. These throwing end points are used for connecting this node to other siblings and parents. See the documentation of IFlowGraphEndPoints.getNormalEndPoints() and IFlowGraphEndPoints.getThrowingEndPoints() for more details.

Specified by:

createFlowGraph in interface IWorkflowNodeFlowAnalyzer<Object>

Type Parameters:

TElement - The type of the node elements on which the analysis is performed. This type may be different depending on whether the analysis is performed on the backend data model WorkflowNode or the frontend view model.

Parameters:

params - The node to analyze and the current analysis context.

Returns:

The set of all end points of the given node. Use ICreateFlowGraphContext#endPoints and its variants to create this return value. See the documentation of IFlowGraphEndPoints.getNormalEndPoints() and IFlowGraphEndPoints.getThrowingEndPoints() for more details.

Throws:

WorkflowAnalysisException - May be thrown when an unhandled exception occurred during the analysis. If this exception is thrown, the entire analysis is cancelled and the exception is propagated up. You should only throw this exception yourself if encountering an illegal state that would render the analysis invalid.