Better implementation of Visitor Pattern (Debug and Expression)

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Src/Exporter/DebugExporter.cs

@@ -8,9 +8,7 @@
  */
 using System;
 using System.Collections.ObjectModel;
-
 using ICSharpCode.Reporting.Exporter.Visitors;
-using ICSharpCode.Reporting.Interfaces.Export;
 using ICSharpCode.Reporting.PageBuilder.ExportColumns;
 
 namespace ICSharpCode.Reporting.Exporter
@@ -18,7 +16,7 @@ namespace ICSharpCode.Reporting.Exporter
 	/// <summary>
 	/// Description of DebugExporter.
 	/// </summary>
-	public class DebugExporter:BaseExporter
+	class DebugExporter:BaseExporter
 	{
 		private DebugVisitor visitor;
 		
@@ -29,13 +27,22 @@ namespace ICSharpCode.Reporting.Exporter
 		
 		
 		public override void Run () {
-			Console.WriteLine(" DebugExporter with {0} Pages ",Pages.Count);
+			Console.WriteLine();
+			Console.WriteLine("Start DebugExporter with {0} Pages ",Pages.Count);
 			foreach (var page in Pages) {
-				ShowDebug("--",page);
+				IAcceptor ac = page as IAcceptor;
+				if (ac != null) {
+					visitor.Visit(page);
+				}
+//				RunInternal("--",page);
 				Console.WriteLine("-----------PageBreak---------");
 			}
+			Console.WriteLine("Finish DebugVisitor");
+			Console.WriteLine();
 		}
-		void ShowDebug(string header,IExportContainer container)
+		
+		/*
+		void RunInternal(string header,IExportContainer container)
 		{
 			var leading = header;
 			Console.WriteLine();
@@ -45,7 +52,7 @@ namespace ICSharpCode.Reporting.Exporter
 				var acceptor = item as IAcceptor;
 				if (exportContainer != null) {
 					if (exportContainer.ExportedItems.Count > 0) {
-						ShowDebug(leading = leading + "--",exportContainer);
+						RunInternal(leading = leading + "--",exportContainer);
 						acceptor.Accept(visitor);
 //						ShowDebug(leading = leading + "--",exportContainer);
 						leading = leading.Substring(0,leading.Length -2);
@@ -64,6 +71,6 @@ namespace ICSharpCode.Reporting.Exporter
 				leading = leading.Substring(0, leading.Length - 2);
 			}
 		}
-		
+		*/
 	}
 }

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Src/Exporter/Visitors/DebugVisitor.cs

@@ -7,7 +7,6 @@
  * To change this template use Tools | Options | Coding | Edit Standard Headers.
  */
 using System;
-using ICSharpCode.Reporting.BaseClasses;
 using ICSharpCode.Reporting.PageBuilder.ExportColumns;
 
 namespace ICSharpCode.Reporting.Exporter.Visitors
@@ -18,12 +17,18 @@ namespace ICSharpCode.Reporting.Exporter.Visitors
 //	http://www.remondo.net/strategy-pattern-example-csharp/
 	
 	
-	public class DebugVisitor : AbstractVisitor
+	class DebugVisitor : AbstractVisitor
 	{
+		
+		
 		public override void Visit(ExportPage page)
 		{
 			Console.WriteLine("<Page> {0} - {1}  Items {2}",
 			                 page.Name,page.Location,page.BackColor);
+			foreach (var element in page.ExportedItems) {
+				var ac = element as IAcceptor;
+				ac.Accept(this);
+			}
 		}
 		
 		
@@ -33,22 +38,21 @@ namespace ICSharpCode.Reporting.Exporter.Visitors
 		}
 		
 		
-		
 		public override void Visit(ExportContainer exportColumn)
 		{
 			Console.WriteLine();
-//			Console.WriteLine("<ExportContainer> {0} - {1}  Items {2}",
+			Console.WriteLine("\t{0} - {1}  Items {2}",
-//			                  exportColumn.Name,exportColumn.Location,exportColumn.BackColor);
-				Console.WriteLine("{0} - {1}  Items {2}",
 			                  exportColumn.Name,exportColumn.Location,exportColumn.BackColor);
+			foreach (var element in exportColumn.ExportedItems) {
+				var ac = element as IAcceptor;
+				ac.Accept(this);
+			}
 		}
 		
+		
 		public override void Visit(ExportText exportColumn)
 		{
-			Console.WriteLine("<ExportText> {0} - {1}", exportColumn.Text,exportColumn.Location);
+			Console.WriteLine("\t\t<ExportText> {0} - {1}", exportColumn.Text,exportColumn.Location);
 		}
-		
-		
 	}
-
 }

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Src/Exporter/Visitors/ExpressionVisitor.cs

@@ -3,39 +3,63 @@
 using System;
 using System.Collections.ObjectModel;
 using ICSharpCode.Reporting.PageBuilder.ExportColumns;
+using Irony.Interpreter.Evaluator;
 
 namespace ICSharpCode.Reporting.Exporter.Visitors
 {
 	/// <summary>
 	/// Description of ExpressionVisitor.
 	/// </summary>
-	internal class ExpressionVisitor: AbstractVisitor
+	class ExpressionVisitor: AbstractVisitor
 	{
 		private readonly Collection<ExportPage> pages;
+		private readonly ExpressionEvaluatorGrammar grammar;
+		private readonly ExpressionEvaluator evaluator;
 		
 		public ExpressionVisitor(Collection<ExportPage> pages)
 		{
 			this.pages = pages;
+			grammar = new ExpressionEvaluatorGrammar();
+			evaluator = new ExpressionEvaluator(grammar);
 		}
 		
 		public override void Visit(ICSharpCode.Reporting.PageBuilder.ExportColumns.ExportColumn exportColumn)
 		{
 			Console.WriteLine("Visit Page ");
+			
 		}
 		
 		public override void Visit(ICSharpCode.Reporting.PageBuilder.ExportColumns.ExportText exportColumn)
 		{
-			Console.WriteLine("ExpressionVisitor <{0}>",exportColumn.Name);
+			Console.WriteLine("\t\t<ExportText> {0} - {1}", exportColumn.Text,exportColumn.Location);
+			var result = evaluator.Evaluate("2 + 3");
+			Console.WriteLine("ExpressionVisitor <{0}> - {1}",exportColumn.Name,result);
+			
 		}
 		
 		public override void Visit(ICSharpCode.Reporting.PageBuilder.ExportColumns.ExportContainer exportColumn)
 		{
-			Console.WriteLine("ExpressionVisitor <{0}>",exportColumn.Name);
+			Console.WriteLine("\t{0} - {1}  Items {2}",
+			                  exportColumn.Name,exportColumn.Location,exportColumn.BackColor);
+			foreach (var element in exportColumn.ExportedItems) {
+				var ac = element as IAcceptor;
+				ac.Accept(this);
+			}
+			var result = evaluator.Evaluate("2 * 10");
+			Console.WriteLine("ExpressionVisitor <{0}> - {1}",exportColumn.Name,result);
+			
+			
 		}
 		
 		public override void Visit(ICSharpCode.Reporting.PageBuilder.ExportColumns.ExportPage page)
 		{
-			Console.WriteLine("ExpressionVisitor page <{0}>",page.PageInfo.PageNumber);
+			foreach (var element in page.ExportedItems) {
+				var ac = element as IAcceptor;
+				ac.Accept(this);
+			}
+			var result = evaluator.Evaluate("5 * 10");
+//			Console.WriteLine("ExpressionVisitor <{0} - {1}>",exportColumn.Name,result);
+			Console.WriteLine("ExpressionVisitor page <{0}> {1}",page.PageInfo.PageNumber,result);
 		}
 	}
 }

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Src/Expressions/ExpressionRunner.cs

@@ -27,13 +27,109 @@ namespace ICSharpCode.Reporting.Expressions
 		
 		public override void Run()
 		{
+			Console.WriteLine();
 			Console.WriteLine("Start ExpressionVisitor");
 			foreach (var page in Pages) {
-				InternalRun(page);
+				var acceptor = page as IAcceptor;
+				acceptor.Accept(visitor);
+//				RunInternal(page);
 			}
 			Console.WriteLine("Finish ExpressionVisitor");
+			Console.WriteLine();
+		}
+		
+//		"Visitor"
+//		http://irony.codeplex.com/discussions/213938
+//		
+//		http://irony.codeplex.com/discussions/35310
+		
+		/*
+		void RunInternal(IExportContainer container)
+		{
+//			Console.WriteLine();
+//			Console.WriteLine("{0}{1}",leading,container.Name);
+			foreach (var item in container.ExportedItems) {
+				var exportContainer = item as IExportContainer;
+				var acceptor = item as IAcceptor;
+				if (exportContainer != null) {
+					if (exportContainer.ExportedItems.Count > 0) {
+//						acceptor.Accept(visitor);
+						bRunInternal(exportContainer.ExportedItems);
+						acceptor.Accept(visitor);
+//						ShowDebug(leading = leading + "--",exportContainer);
+						
+					}
+				}
+//				acceptor.Accept(visitor);
+			}
+		}
+		*/
+		/*
+		
+		void bRunInternal(List<IExportColumn> list)
+		{
+//			Console.WriteLine();
+//			Console.WriteLine("{0}{1}",leading,container.Name);
+			foreach (var item in list) {
+				var exportContainer = item as IExportContainer;
+				var acceptor = item as IAcceptor;
+				if (exportContainer != null) {
+					if (exportContainer.ExportedItems.Count > 0) {
+						acceptor.Accept(visitor);
+						RunInternal(exportContainer);
+						
+//						ShowDebug(leading = leading + "--",exportContainer);
+						
+					}
+				}
+				acceptor.Accept(visitor);
+			}
+		}
+		*/
+		/*
+		void bRunInternal(IExportContainer container)
+		{
+//			Console.WriteLine();
+//			Console.WriteLine("{0}{1}",leading,container.Name);
+			foreach (var item in container.ExportedItems) {
+				var exportContainer = item as IExportContainer;
+				var acceptor = item as IAcceptor;
+				if (exportContainer != null) {
+					if (exportContainer.ExportedItems.Count > 0) {
+						acceptor.Accept(visitor);
+						RunInternal(exportContainer);
+						
+//						ShowDebug(leading = leading + "--",exportContainer);
+						
+					}
+				}
+				acceptor.Accept(visitor);
+			}
 		}
+		*/
 		
+		/*
+		//Items first, then container
+		void aRunInternal(IExportContainer container)
+		{
+//			Console.WriteLine();
+//			Console.WriteLine("{0}{1}",leading,container.Name);
+			foreach (var item in container.ExportedItems) {
+				var exportContainer = item as IExportContainer;
+				var acceptor = item as IAcceptor;
+				if (exportContainer != null) {
+					if (exportContainer.ExportedItems.Count > 0) {
+						RunInternal(exportContainer);
+						acceptor.Accept(visitor);
+//						ShowDebug(leading = leading + "--",exportContainer);
+						
+					}
+				}
+				acceptor.Accept(visitor);
+			}
+		}
+		*/
+		/*
 		void InternalRun(ExportPage page)
 		{
 			page.Accept(visitor);
@@ -43,5 +139,6 @@ namespace ICSharpCode.Reporting.Expressions
 				acceptor.Accept(visitor);
 			}
 		}
+		*/
 	}
 }

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Src/PageBuilder/FormPageBuilder.cs

@@ -8,6 +8,7 @@
  */
 using System;
 using System.Linq;
+using ICSharpCode.Reporting.Exporter;
 using ICSharpCode.Reporting.Expressions;
 using ICSharpCode.Reporting.Interfaces;
 
@@ -29,6 +30,8 @@ namespace ICSharpCode.Reporting.PageBuilder
 			base.BuildExportList();
 			BuildDetail();
 			base.AddPage(CurrentPage);
+			var d = new DebugExporter(Pages);
+			d.Run();
 			var er = new ExpressionRunner(Pages);
 			er.Run();
 		}

src/AddIns/Misc/Reporting/ICSharpCode.Reporting/Test/ICSharpCode.Reporting.Test/src/PageBuilder/PageLayoutFixture.cs

@@ -13,7 +13,6 @@ using System.Reflection;
 
 using ICSharpCode.Reporting.Exporter;
 using ICSharpCode.Reporting.Interfaces;
-using ICSharpCode.Reporting.Interfaces.Export;
 using ICSharpCode.Reporting.PageBuilder.ExportColumns;
 using NUnit.Framework;