Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Workflow.Activities/Rules/RuleEngine.cs

@@ -0,0 +1,72 @@
+// ---------------------------------------------------------------------------
+// Copyright (C) 2006 Microsoft Corporation All Rights Reserved
+// ---------------------------------------------------------------------------
+
+#define CODE_ANALYSIS
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using System.Workflow.ComponentModel;
+
+namespace System.Workflow.Activities.Rules
+{
+    public class RuleEngine
+    {
+        private string name;
+        private RuleValidation validation;
+        private IList<RuleState> analyzedRules;
+
+        public RuleEngine(RuleSet ruleSet, RuleValidation validation)
+            : this(ruleSet, validation, null)
+        {
+        }
+
+        public RuleEngine(RuleSet ruleSet, Type objectType)
+            : this(ruleSet, new RuleValidation(objectType, null), null)
+        {
+        }
+
+        internal RuleEngine(RuleSet ruleSet, RuleValidation validation, ActivityExecutionContext executionContext)
+        {
+            // now validate it
+            if (!ruleSet.Validate(validation))
+            {
+                string message = string.Format(CultureInfo.CurrentCulture, Messages.RuleSetValidationFailed, ruleSet.name);
+                throw new RuleSetValidationException(message, validation.Errors);
+            }
+
+            this.name = ruleSet.Name;
+            this.validation = validation;
+            Tracer tracer = null;
+            if (WorkflowActivityTrace.Rules.Switch.ShouldTrace(TraceEventType.Information))
+                tracer = new Tracer(ruleSet.Name, executionContext);
+            this.analyzedRules = Executor.Preprocess(ruleSet.ChainingBehavior, ruleSet.Rules, validation, tracer);
+        }
+
+
+        [SuppressMessage("Microsoft.Naming", "CA1720:AvoidTypeNamesInParameters", MessageId = "0#")]
+        public void Execute(object thisObject, ActivityExecutionContext executionContext)
+        {
+            Execute(new RuleExecution(validation, thisObject, executionContext));
+        }
+
+
+        [SuppressMessage("Microsoft.Naming", "CA1720:AvoidTypeNamesInParameters", MessageId = "0#")]
+        public void Execute(object thisObject)
+        {
+            Execute(new RuleExecution(validation, thisObject, null));
+        }
+
+        internal void Execute(RuleExecution ruleExecution)
+        {
+            Tracer tracer = null;
+            if (WorkflowActivityTrace.Rules.Switch.ShouldTrace(TraceEventType.Information))
+            {
+                tracer = new Tracer(name, ruleExecution.ActivityExecutionContext);
+                tracer.StartRuleSet();
+            }
+            Executor.ExecuteRuleSet(analyzedRules, ruleExecution, tracer, RuleSet.RuleSetTrackingKey + name);
+        }
+    }
+}