Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Rules / Rule.cs / 1305376 / Rule.cs
// ---------------------------------------------------------------------------- // Copyright (C) 2005 Microsoft Corporation All Rights Reserved // --------------------------------------------------------------------------- using System; using System.CodeDom; using System.Collections; using System.Collections.Generic; using System.Globalization; using System.Workflow.ComponentModel; using System.Workflow.ComponentModel.Compiler; using System.ComponentModel; using System.Workflow.Activities.Common; namespace System.Workflow.Activities.Rules { public enum RuleReevaluationBehavior { Never, Always }; [Serializable] public class Rule { internal string name; internal string description; internal int priority; internal RuleReevaluationBehavior behavior = RuleReevaluationBehavior.Always; internal bool active = true; internal RuleCondition condition; internal IListthenActions; internal IList elseActions; private bool runtimeInitialized; public Rule() { } public Rule(string name) { this.name = name; } public Rule(string name, RuleCondition condition, IList thenActions) { this.name = name; this.condition = condition; this.thenActions = thenActions; } public Rule(string name, RuleCondition condition, IList thenActions, IList elseActions) { this.name = name; this.condition = condition; this.thenActions = thenActions; this.elseActions = elseActions; } public string Name { get { return name; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); name = value; } } public string Description { get { return description; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); description = value; } } public int Priority { get { return priority; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); priority = value; } } public RuleReevaluationBehavior ReevaluationBehavior { get { return behavior; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); behavior = value; } } public bool Active { get { return active; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); active = value; } } public RuleCondition Condition { get { return condition; } set { if (runtimeInitialized) throw new InvalidOperationException(SR.GetString(SR.Error_CanNotChangeAtRuntime)); condition = value; } } [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public IList ThenActions { get { if (thenActions == null) thenActions = new List (); return thenActions; } } [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] public IList ElseActions { get { if (elseActions == null) elseActions = new List (); return elseActions; } } internal void Validate(RuleValidation validation) { int oldErrorCount = validation.Errors.Count; if (string.IsNullOrEmpty(name)) validation.Errors.Add(new ValidationError(Messages.RuleNameMissing, ErrorNumbers.Error_InvalidConditionName)); // check the condition if (condition == null) validation.Errors.Add(new ValidationError(Messages.MissingRuleCondition, ErrorNumbers.Error_MissingRuleCondition)); else condition.Validate(validation); // check the optional then actions if (thenActions != null) ValidateRuleActions(thenActions, validation); // check the optional else actions if (elseActions != null) ValidateRuleActions(elseActions, validation); // fix up the error messages by prepending the rule name ValidationErrorCollection errors = validation.Errors; if (errors.Count > oldErrorCount) { string prefix = string.Format(CultureInfo.CurrentCulture, Messages.RuleValidationError, name); int newErrorCount = errors.Count; for (int i = oldErrorCount; i < newErrorCount; ++i) { ValidationError oldError = errors[i]; ValidationError newError = new ValidationError(prefix + oldError.ErrorText, oldError.ErrorNumber, oldError.IsWarning); foreach (DictionaryEntry de in oldError.UserData) newError.UserData[de.Key] = de.Value; errors[i] = newError; } } } private static void ValidateRuleActions(ICollection ruleActions, RuleValidation validator) { bool seenHalt = false; bool statementsAfterHalt = false; foreach (RuleAction action in ruleActions) { action.Validate(validator); if (seenHalt) statementsAfterHalt = true; if (action is RuleHaltAction) seenHalt = true; } if (statementsAfterHalt) { // one or more actions after Halt validator.Errors.Add(new ValidationError(Messages.UnreachableCodeHalt, ErrorNumbers.Warning_UnreachableCode, true)); } } public Rule Clone() { Rule newRule = (Rule)this.MemberwiseClone(); newRule.runtimeInitialized = false; if (this.condition != null) newRule.condition = this.condition.Clone(); if (this.thenActions != null) { newRule.thenActions = new List (); foreach (RuleAction thenAction in this.thenActions) newRule.thenActions.Add(thenAction.Clone()); } if (this.elseActions != null) { newRule.elseActions = new List (); foreach (RuleAction elseAction in this.elseActions) newRule.elseActions.Add(elseAction.Clone()); } return newRule; } public override bool Equals(object obj) { Rule other = obj as Rule; if (other == null) return false; if ((this.Name != other.Name) || (this.Description != other.Description) || (this.Active != other.Active) || (this.ReevaluationBehavior != other.ReevaluationBehavior) || (this.Priority != other.Priority)) return false; // look similar, compare condition (can be null) if (this.Condition == null) { if (other.Condition != null) return false; } else { if (!this.Condition.Equals(other.Condition)) return false; } // compare ThenActions (may be null) if (!ActionsEqual(this.thenActions, other.thenActions)) return false; if (!ActionsEqual(this.elseActions, other.elseActions)) return false; return true; } private static bool ActionsEqual(IList myActions, IList otherActions) { if ((myActions == null) && (otherActions == null)) return true; if ((myActions == null) || (otherActions == null)) return false; if (myActions.Count != otherActions.Count) return false; for (int i = 0; i < myActions.Count; ++i) { if (!myActions[i].Equals(otherActions[i])) return false; } return true; } public override int GetHashCode() { return base.GetHashCode(); } internal void OnRuntimeInitialized() { runtimeInitialized = true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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