/SharpTAL/TemplateCache/MemoryTemplateCache.cs

//
// MemoryTemplateCache.cs
//
// Author:
//   Roman Lacko (backup.rlacko@gmail.com)
//
// Copyright (c) 2010 - 2013 Roman Lacko
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

namespace SharpTAL.TemplateCache
{
	using System;
	using System.Collections.Generic;
	using System.Reflection;
	using SharpTAL.TemplateProgram;

	public class MemoryTemplateCache : AbstractTemplateCache
	{
		Dictionary<string, TemplateInfo> templateInfoCache;
		object templateInfoCacheLock;

		/// <summary>
		/// Initialize the template cache
		/// </summary>
		public MemoryTemplateCache() :
			base()
		{
			templateInfoCache = new Dictionary<string, TemplateInfo>();
			templateInfoCacheLock = new object();
		}

		public override TemplateInfo CompileTemplate(string templateBody, Dictionary<string, Type> globalsTypes, List<Assembly> referencedAssemblies)
		{
			lock (templateInfoCacheLock)
			{
				// Generate template program
				TemplateInfo ti = GenerateTemplateProgram(templateBody, globalsTypes, referencedAssemblies);

				// Generated template found in cache
				if (templateInfoCache.ContainsKey(ti.TemplateKey))
				{
					return templateInfoCache[ti.TemplateKey];
				}

				// Generate code
				ICodeGenerator codeGenerator = new CodeGenerator();
				ti.GeneratedSourceCode = codeGenerator.GenerateCode(ti);

				// Generate assembly
				AssemblyGenerator assemblyCompiler = new AssemblyGenerator();
				Assembly assembly = assemblyCompiler.GenerateAssembly(ti, true, null, null);

				// Try to load the Render() method from assembly
				ti.RenderMethod = GetTemplateRenderMethod(assembly, ti);

				templateInfoCache.Add(ti.TemplateKey, ti);

				return ti;
			}
		}
	}
}