1Workflow::Condition::NeUssteerd(C3o)ntributed Perl DocumWeonrtkaftlioown::Condition::Nested(3)
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NAME

6       Workflow::Condition::Nested - Evaluate nested workflow conditions
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VERSION

9       This documentation describes version 1.54 of this package
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DESCRIPTION

12       Typically, the workflow conditions are evaluated directly by the
13       framework in Workflow::State when the action is evaluated. This module
14       allows a workflow condition to contain nested conditions that are
15       evaluated directly rather than via separate workflow actions.
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17       This allows the workflow to be designed to group multiple conditions
18       and perform advanced  operations like an OR comparision of multiple
19       conditions with "greedy" evaluation (as opposed to "lazy" evaluation).
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21       A usage example might be a case where 3 of 5 possible approvals are
22       needed for an action to be allowed. The "Greedy OR" condition would
23       define the list of conditions to be evaluated. After checking each
24       condition, it would return the total number of successes. The result is
25       then checked against the number needed, returning the boolean value
26       needed by Workflow::State.
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28       Note: This class is not used directly, but subclassed by your class
29       that implements the "evaluate()" method and calls the
30       "evaluate_condition" method to evaluate its nested conditions.
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SYNOPSIS

33       In condition.xml:
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35           <condition name="cond1" ... />
36           <condition name="cond2" ... />
37           <condition name="cond3" ... />
38           <condition name="cond4" ... />
39           <condition name="cond5" ... />
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41           <condition name="count_approvals" class="Workflow::Condition::GreedyOR">
42               <param name="condition" value="cond1" />
43               <param name="condition" value="cond2" />
44               <param name="condition" value="cond3" />
45               <param name="condition" value="cond4" />
46               <param name="condition" value="cond5" />
47           </condition>
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49           <condition name="check_approvals" class="Workflow::Condition::CheckReturn">
50               <param name="condition" value="count_approvals" />
51               <!-- operator "ge" means: greater than or equal to -->
52               <param name="operator"  value="ge" />
53               <param name="argument"  value="$context->{approvals_needed}" />
54           </condition>
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56       In workflow.xml:
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58           <state name="CHECK_APPROVALS" autorun="yes">
59               <action name="null_1" resulting_state="APPROVED">
60                   <condition name="check_approvals" />
61               </action>
62               <action name="null_2" resulting_state="REJECTED">
63                   <condition name="!check_approvals" />
64               </action>
65           </state>
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AUTHORS

68       See Workflow
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71       Copyright (c) 2004-2021 Chris Winters. All rights reserved.
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73       This library is free software; you can redistribute it and/or modify it
74       under the same terms as Perl itself.
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76       Please see the LICENSE
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AUTHORS

79       Please see Workflow
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83perl v5.34.0                      2021-07-27    Workflow::Condition::Nested(3)
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