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A .NET State Machine Toolkit - Part III

, 26 Oct 2006 CPOL 160.6K 850 132
Using code generation with the .NET state machine toolkit.
statemachinetoolkitpartiii_demo.zip
StateMachineToolkit
StateMachineBuilderDemo
App.ico
StateMachineBuilderDemo.csproj.user
StateMachineDemo
App.ico
StateMachineDemo.csproj.user
StateMachineMaker
App.ico
StateMachineMaker.csproj.user
StateMachineToolkit
bin
Debug
LSCollections.dll
CodeGeneration
StateMachineBuilder
StateMachineToolkit.csproj.user
statemachinetoolkitpartiii_src.zip
StateMachineToolkitPartIII_src
CodeGeneration
/*
 * Created by: Leslie Sanford
 * 
 * Contact: jabberdabber@hotmail.com
 * 
 * Last modified: 09/13/2005
 */

using System;
using System.CodeDom;

namespace StateMachineToolkit
{
	/// <summary>
	/// Builds the state machine's constructor.
	/// </summary>
	internal class ConstructorBuilder
	{
        #region ConstructorBuilder Members

        #region Fields

        // The state machine's initial state.
        private string initialState = string.Empty;

        // The built constructor.
        private CodeConstructor result = new CodeConstructor();

        #endregion        

        #region Methods

        /// <summary>
        /// Builds the constructor.
        /// </summary>
        public void Build()
        {
            result = new CodeConstructor();

            result.Attributes = MemberAttributes.Public;
            result.Parameters.Add(new CodeParameterDeclarationExpression(
                typeof(EventQueue), "queue"));
            result.BaseConstructorArgs.Add(
                new CodeArgumentReferenceExpression("queue"));

            CodeThisReferenceExpression thisReference = new CodeThisReferenceExpression();
            CodeMethodInvokeExpression methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeStates";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeGuards";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeActions";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeTransitions";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeRelationships";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeHistoryTypes";

            result.Statements.Add(methodInvoke);

            methodInvoke = new CodeMethodInvokeExpression();

            methodInvoke.Method.TargetObject = thisReference;
            methodInvoke.Method.MethodName = "InitializeInitialStates";

            result.Statements.Add(methodInvoke);

            CodeExpression[] parameters = 
                {
                    new CodeFieldReferenceExpression(thisReference,
                    "state" + InitialState) 
                };

            CodeMethodInvokeExpression initializeInvoke = 
                new CodeMethodInvokeExpression(thisReference,
                "Initialize", parameters);

            result.Statements.Add(initializeInvoke);
        }

        #endregion

        #region Properties

        /// <summary>
        /// Gets the built constructor.
        /// </summary>
        public CodeConstructor Result
        {
            get
            {
                return result;
            }
        }

        /// <summary>
        /// Gets or sets the state machine's initial state.
        /// </summary>
        public string InitialState
        {
            get
            {
                return initialState;
            }
            set
            {
                initialState = value;
            }
        }

        #endregion

        #endregion
	}
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Leslie Sanford

United States United States
Aside from dabbling in BASIC on his old Atari 1040ST years ago, Leslie's programming experience didn't really begin until he discovered the Internet in the late 90s. There he found a treasure trove of information about two of his favorite interests: MIDI and sound synthesis.

After spending a good deal of time calculating formulas he found on the Internet for creating new sounds by hand, he decided that an easier way would be to program the computer to do the work for him. This led him to learn C. He discovered that beyond using programming as a tool for synthesizing sound, he loved programming in and of itself.

Eventually he taught himself C++ and C#, and along the way he immersed himself in the ideas of object oriented programming. Like many of us, he gotten bitten by the design patterns bug and a copy of GOF is never far from his hands.

Now his primary interest is in creating a complete MIDI toolkit using the C# language. He hopes to create something that will become an indispensable tool for those wanting to write MIDI applications for the .NET framework.

Besides programming, his other interests are photography and playing his Les Paul guitars.

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