Package com.axelor.workflow.expression

Class WorkflowConditionEvaluator

java.lang.Object

com.axelor.workflow.expression.WorkflowConditionEvaluator

public class WorkflowConditionEvaluator
extends Object

Evaluates a workflow when predicate in a sandbox. Exposes only the self and old scalar snapshots and log: no __repo__, __bean__, host classes or polyglot access, which keeps it safe on the save path. Compiled sources are cached.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
final class	WorkflowConditionEvaluator.Batch	Answers many predicates in one sandbox realm; a fresh realm's first evaluation pays the JS builtins' lazy setup.

Constructor Summary

Constructors

Constructor	Description
WorkflowConditionEvaluator()

Method Summary

Modifier and Type	Method	Description
WorkflowConditionEvaluator.Batch	batch()	Opens a batch; see WorkflowConditionEvaluator.Batch for what may share one.
void	check(String expr)	Parse-checks source as authored, without running it; throws on a syntax error.
boolean	evaluate(String expr, Map<String,Object> self, Map<String,Object> old)	Evaluates the predicate against the snapshots, as a JavaScript truthiness boolean.
boolean[]	evaluateTransition(String expr, Map<String,Object> self, Map<String,Object> old)	Evaluates the predicate against the new snapshot and, when old is present, against the prior one, in one context.
static org.graalvm.polyglot.proxy.ProxyObject	toGuest(Map<String,Object> snapshot)	Wraps a snapshot map as a guest object, coercing host scalars to guest values.

Methods inherited from class java.lang.Object

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

Constructor Details

WorkflowConditionEvaluator

public WorkflowConditionEvaluator()

Method Details

evaluate

public boolean evaluate(String expr,
 Map<String,Object> self,
 Map<String,Object> old)

Evaluates the predicate against the snapshots, as a JavaScript truthiness boolean.

Parameters:

expr - the when predicate

self - current scalar field values (never null)

old - prior scalar field values, or null on create

evaluateTransition

public boolean[] evaluateTransition(String expr,
 Map<String,Object> self,
 Map<String,Object> old)

Evaluates the predicate against the new snapshot and, when old is present, against the prior one, in one context. Returns [whenNew, whenOld]; whenOld is false on create.

check

public void check(String expr)

Parse-checks source as authored, without running it; throws on a syntax error. Also used for script bodies, which are statements, so the source is not wrapped as a predicate(java.lang.String).

batch

public WorkflowConditionEvaluator.Batch batch()

Opens a batch; see WorkflowConditionEvaluator.Batch for what may share one.

toGuest

public static org.graalvm.polyglot.proxy.ProxyObject toGuest(Map<String,Object> snapshot)

Wraps a snapshot map as a guest object, coercing host scalars to guest values.