RuleAction.cs source code in C# .NET

                        Code:
                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / cdf / src / WF / Activities / Rules / RuleAction.cs / 1305376 / RuleAction.cs
                        
                        
                            #pragma warning disable 1634, 1691 
using System;
using System.Text;
using System.CodeDom;
using System.Reflection; 
using System.Globalization;
using System.Collections.Generic; 
using System.Workflow.ComponentModel; 
using System.Workflow.ComponentModel.Compiler;
using System.Workflow.ComponentModel.Serialization; 
using System.Workflow.Activities.Common;

namespace System.Workflow.Activities.Rules
{ 
    [Serializable]
    public abstract class RuleAction 
    { 
        public abstract bool Validate(RuleValidation validator);
        public abstract void Execute(RuleExecution context); 
        public abstract ICollection GetSideEffects(RuleValidation validation);
        public abstract RuleAction Clone();
    }
 
    [Serializable]
    public class RuleHaltAction : RuleAction 
    { 
        public override bool Validate(RuleValidation validator)
        { 
            // Trivial... nothing to validate.
            return true;
        }
 
        public override void Execute(RuleExecution context)
        { 
            if (context == null) 
                throw new ArgumentNullException("context");
            context.Halted = true; 
        }

        public override ICollection GetSideEffects(RuleValidation validation)
        { 
            return null;
        } 
 
        public override RuleAction Clone()
        { 
            return (RuleAction)this.MemberwiseClone();
        }

        public override string ToString() 
        {
            return "Halt"; 
        } 

        public override bool Equals(object obj) 
        {
            return (obj is RuleHaltAction);
        }
 
        public override int GetHashCode()
        { 
            return base.GetHashCode(); 
        }
    } 


    [Serializable]
    public class RuleUpdateAction : RuleAction 
    {
        private string path; 
 
        public RuleUpdateAction(string path)
        { 
            this.path = path;
        }

        public RuleUpdateAction() 
        {
        } 
 
        public string Path
        { 
            get { return path; }
            set { path = value; }
        }
 
        public override bool Validate(RuleValidation validator)
        { 
            if (validator == null) 
                throw new ArgumentNullException("validator");
 
            bool success = true;

            if (path == null)
            { 
                ValidationError error = new ValidationError(Messages.NullUpdate, ErrorNumbers.Error_ParameterNotSet);
                error.UserData[RuleUserDataKeys.ErrorObject] = this; 
                validator.AddError(error); 
                success = false;
            } 

            // now make sure that the path is valid
            string[] parts = path.Split('/');
            if (parts[0] == "this") 
            {
                Type currentType = validator.ThisType; 
                for (int i = 1; i < parts.Length; ++i) 
                {
                    if (parts[i] == "*") 
                    {
                        if (i < parts.Length - 1)
                        {
                            // The "*" occurred in the middle of the path, which is a no-no. 
                            ValidationError error = new ValidationError(Messages.InvalidWildCardInPathQualifier, ErrorNumbers.Error_InvalidWildCardInPathQualifier);
                            error.UserData[RuleUserDataKeys.ErrorObject] = this; 
                            validator.AddError(error); 
                            success = false;
                            break; 
                        }
                        else
                        {
                            // It occurred at the end, which is okay. 
                            break;
                        } 
                    } 
                    else if (string.IsNullOrEmpty(parts[i]) && i == parts.Length - 1)
                    { 
                        // It's okay to end with a "/".
                        break;
                    }
 
                    while (currentType.IsArray)
                        currentType = currentType.GetElementType(); 
 
                    BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.FlattenHierarchy;
                    if (validator.AllowInternalMembers(currentType)) 
                        bindingFlags |= BindingFlags.NonPublic;
                    FieldInfo field = currentType.GetField(parts[i], bindingFlags);
                    if (field != null)
                    { 
                        currentType = field.FieldType;
                    } 
                    else 
                    {
                        PropertyInfo property = currentType.GetProperty(parts[i], bindingFlags); 
                        if (property != null)
                        {
                            currentType = property.PropertyType;
                        } 
                        else
                        { 
                            string message = string.Format(CultureInfo.CurrentCulture, Messages.UpdateUnknownFieldOrProperty, parts[i]); 
                            ValidationError error = new ValidationError(message, ErrorNumbers.Error_InvalidUpdate);
                            error.UserData[RuleUserDataKeys.ErrorObject] = this; 
                            validator.AddError(error);
                            success = false;
                            break;
                        } 
                    }
                } 
            } 
            else
            { 
                ValidationError error = new ValidationError(Messages.UpdateNotThis, ErrorNumbers.Error_InvalidUpdate);
                error.UserData[RuleUserDataKeys.ErrorObject] = this;
                validator.AddError(error);
                success = false; 
            }
 
            return success; 
        }
 
        public override void Execute(RuleExecution context)
        {
            // This action has no execution behaviour.
        } 

        public override ICollection GetSideEffects(RuleValidation validation) 
        { 
            return new string[] { this.path };
        } 

        public override RuleAction Clone()
        {
            return (RuleAction)this.MemberwiseClone(); 
        }
 
        public override string ToString() 
        {
            return "Update(\"" + this.path + "\")"; 
        }

        public override bool Equals(object obj)
        { 
#pragma warning disable 56506
            RuleUpdateAction other = obj as RuleUpdateAction; 
            return ((other != null) && (string.Equals(this.Path, other.Path, StringComparison.Ordinal))); 
#pragma warning restore 56506
        } 

        public override int GetHashCode()
        {
            return base.GetHashCode(); 
        }
    } 
 
    [Serializable]
    public class RuleStatementAction : RuleAction 
    {
        private CodeStatement codeDomStatement;

        public RuleStatementAction(CodeStatement codeDomStatement) 
        {
            this.codeDomStatement = codeDomStatement; 
        } 

        public RuleStatementAction(CodeExpression codeDomExpression) 
        {
            this.codeDomStatement = new CodeExpressionStatement(codeDomExpression);
        }
 
        public RuleStatementAction()
        { 
        } 

        public CodeStatement CodeDomStatement 
        {
            get { return codeDomStatement; }
            set { codeDomStatement = value; }
        } 

        public override bool Validate(RuleValidation validator) 
        { 
            if (validator == null)
                throw new ArgumentNullException("validator"); 

            if (codeDomStatement == null)
            {
                ValidationError error = new ValidationError(Messages.NullStatement, ErrorNumbers.Error_ParameterNotSet); 
                error.UserData[RuleUserDataKeys.ErrorObject] = this;
                validator.AddError(error); 
                return false; 
            }
            else 
            {
                return CodeDomStatementWalker.Validate(validator, codeDomStatement);
            }
        } 

        public override void Execute(RuleExecution context) 
        { 
            if (codeDomStatement == null)
                throw new InvalidOperationException(Messages.NullStatement); 
            CodeDomStatementWalker.Execute(context, codeDomStatement);
        }

        public override ICollection GetSideEffects(RuleValidation validation) 
        {
            RuleAnalysis analysis = new RuleAnalysis(validation, true); 
            if (codeDomStatement != null) 
                CodeDomStatementWalker.AnalyzeUsage(analysis, codeDomStatement);
            return analysis.GetSymbols(); 
        }

        public override RuleAction Clone()
        { 
            RuleStatementAction newAction = (RuleStatementAction)this.MemberwiseClone();
            newAction.codeDomStatement = CodeDomStatementWalker.Clone(codeDomStatement); 
            return newAction; 
        }
 
        public override string ToString()
        {
            if (codeDomStatement == null)
                return ""; 

            StringBuilder decompilation = new StringBuilder(); 
            CodeDomStatementWalker.Decompile(decompilation, codeDomStatement); 
            return decompilation.ToString();
        } 

        public override bool Equals(object obj)
        {
#pragma warning disable 56506 
            RuleStatementAction other = obj as RuleStatementAction;
            return ((other != null) && (CodeDomStatementWalker.Match(CodeDomStatement, other.CodeDomStatement))); 
#pragma warning restore 56506 
        }
 
        public override int GetHashCode()
        {
            return base.GetHashCode();
        } 
    }
} 

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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RuleAction.cs source code in C# .NET

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