public override void Execute(RuleExecution context)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
context.Halted = true;
}
public override void Execute(RuleExecution context)
{
if (codeDomStatement == null)
{
throw new InvalidOperationException(Messages.NullStatement);
}
CodeDomStatementWalker.Execute(context, codeDomStatement);
}
public override bool Evaluate(RuleExecution execution)
{
if (_expression == null)
{
return(true);
}
return(Executor.EvaluateBool(_expression, execution));
}
internal override void Execute(RuleExecution execution)
{
Type leftType = execution.Validation.ExpressionInfo(assignStatement.Left).ExpressionType;
Type rightType = execution.Validation.ExpressionInfo(assignStatement.Right).ExpressionType;
RuleExpressionResult leftResult = RuleExpressionWalker.Evaluate(execution, assignStatement.Left);
RuleExpressionResult rightResult = RuleExpressionWalker.Evaluate(execution, assignStatement.Right);
leftResult.Value = Executor.AdjustType(rightType, rightResult.Value, leftType);
}
public static RuleExpressionResult Evaluate(RuleExecution execution, CodeExpression expression)
{
if (execution == null)
{
throw new ArgumentNullException("execution");
}
RuleExpressionInternal ruleExpr = GetExpression(expression);
return(ruleExpr.Evaluate(expression, execution));
}
internal void Execute(RuleExecution ruleExecution)
{
Tracer tracer = null;
if (WorkflowActivityTrace.Rules.Switch.ShouldTrace(TraceEventType.Information))
{
tracer = new Tracer(name);
tracer.StartRuleSet();
}
Executor.ExecuteRuleSet(analyzedRules, ruleExecution, tracer, RuleSet.RuleSetTrackingKey + name);
}
public void Execute(RuleExecution ruleExecution)
{
// we have no way of knowing if the ruleset has been changed, so no caching done
if (ruleExecution == null)
{
throw new ArgumentNullException("ruleExecution");
}
if (ruleExecution.Validation == null)
{
throw new ArgumentException(SR.GetString(SR.Error_MissingValidationProperty), "ruleExecution");
}
RuleEngine engine = new RuleEngine(this, ruleExecution.Validation);
engine.Execute(ruleExecution);
}
internal static bool EvaluateBool(CodeExpression expression, RuleExecution context)
{
object result = RuleExpressionWalker.Evaluate(context, expression).Value;
if (result is bool)
{
return((bool)result);
}
Type expectedType = context.Validation.ExpressionInfo(expression).ExpressionType;
if (expectedType == null)
{
// oops ... not a boolean, so error
InvalidOperationException exception = new InvalidOperationException(Messages.ConditionMustBeBoolean);
exception.Data[RuleUserDataKeys.ErrorObject] = expression;
throw exception;
}
return((bool)AdjustType(expectedType, result, typeof(bool)));
}
public override void Execute(RuleExecution context)
{
// This action has no execution behaviour.
}
public abstract void Execute(RuleExecution context);
internal override void Execute(RuleExecution execution)
{
RuleExpressionWalker.Evaluate(execution, exprStatement.Expression);
}
internal abstract void Execute(RuleExecution execution);
internal override RuleExpressionResult Evaluate(CodeExpression expression, RuleExecution execution)
{
return(ruleExpr.Evaluate(execution));
}
internal static void Execute(RuleExecution execution, CodeStatement statement)
{
RuleCodeDomStatement ruleStmt = GetStatement(statement);
ruleStmt.Execute(execution);
}
public abstract bool Evaluate(RuleExecution execution);
internal static void ExecuteRuleSet(IList <RuleState> orderedRules, RuleExecution ruleExecution, Tracer tracer, string trackingKey)
{
// keep track of rule execution
long[] executionCount = new long[orderedRules.Count];
bool[] satisfied = new bool[orderedRules.Count];
// clear the halted flag
ruleExecution.Halted = false;
//ActivityExecutionContext activityExecutionContext = ruleExecution.ActivityExecutionContext;
// loop until we hit the end of the list
int current = 0;
while (current < orderedRules.Count)
{
RuleState currentRuleState = orderedRules[current];
// does this rule need to be evaluated?
if (!satisfied[current])
{
// yes, so evaluate it and determine the list of actions needed
if (tracer != null)
{
tracer.StartRule(currentRuleState.Rule.Name);
}
satisfied[current] = true;
bool result = currentRuleState.Rule.Condition.Evaluate(ruleExecution);
if (tracer != null)
{
tracer.RuleResult(currentRuleState.Rule.Name, result);
}
ICollection <RuleAction> actions = (result) ?
currentRuleState.Rule.thenActions :
currentRuleState.Rule.elseActions;
ICollection <int> activeRules = result ?
currentRuleState.ThenActionsActiveRules :
currentRuleState.ElseActionsActiveRules;
// are there any actions to be performed?
if ((actions != null) && (actions.Count > 0))
{
++executionCount[current];
string ruleName = currentRuleState.Rule.Name;
if (tracer != null)
{
tracer.StartActions(ruleName, result);
}
// evaluate the actions
foreach (RuleAction action in actions)
{
action.Execute(ruleExecution);
// was Halt executed?
if (ruleExecution.Halted)
{
break;
}
}
// was Halt executed?
if (ruleExecution.Halted)
{
break;
}
// any fields updated?
if (activeRules != null)
{
foreach (int updatedRuleIndex in activeRules)
{
RuleState rs = orderedRules[updatedRuleIndex];
if (satisfied[updatedRuleIndex])
{
// evaluate at least once, or repeatedly if appropriate
if ((executionCount[updatedRuleIndex] == 0) || (rs.Rule.ReevaluationBehavior == RuleReevaluationBehavior.Always))
{
if (tracer != null)
{
tracer.TraceUpdate(ruleName, rs.Rule.Name);
}
satisfied[updatedRuleIndex] = false;
if (updatedRuleIndex < current)
{
current = updatedRuleIndex;
}
}
}
}
}
continue;
}
}
++current;
}
// no more rules to execute, so we are done
}