Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Xml / System / Xml / Xslt / XslCompiledTransform.cs / 3 / XslCompiledTransform.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //[....] //http://webdata/xml/specs/XslCompiledTransform.xml //----------------------------------------------------------------------------- using System.CodeDom.Compiler; using System.Diagnostics; using System.IO; using System.Reflection; using System.Reflection.Emit; using System.Security; using System.Security.Permissions; using System.Xml.XPath; using System.Xml.Xsl.Qil; using System.Xml.Xsl.Runtime; using System.Xml.Xsl.Xslt; namespace System.Xml.Xsl { #if ! HIDE_XSL //--------------------------------------------------------------------------------------------------- // Clarification on null values in this API: // stylesheet, stylesheetUri - cannot be null // settings - if null, XsltSettings.Default will be used // stylesheetResolver - if null, XmlNullResolver will be used for includes/imports. // However, if the principal stylesheet is given by its URI, that // URI will be resolved using XmlUrlResolver (for compatibility // with XslTransform and XmlReader). // typeBuilder - cannot be null // scriptAssemblyPath - can be null only if scripts are disabled // compiledStylesheet - cannot be null // executeMethod, queryData - cannot be null // earlyBoundTypes - null means no script types // documentResolver - if null, XmlNullResolver will be used // input, inputUri - cannot be null // arguments - null means no arguments // results, resultsFile - cannot be null //--------------------------------------------------------------------------------------------------- public sealed class XslCompiledTransform { // Permission set that contains Reflection [MemberAccess] permissions private static readonly PermissionSet MemberAccessPermissionSet; // Version for GeneratedCodeAttribute private const string Version = ThisAssembly.Version; static XslCompiledTransform() { MemberAccessPermissionSet = new PermissionSet(PermissionState.None); MemberAccessPermissionSet.AddPermission(new ReflectionPermission(ReflectionPermissionFlag.MemberAccess)); } // Options of compilation private bool enableDebug = false; // Results of compilation private CompilerResults compilerResults = null; private XmlWriterSettings outputSettings = null; private QilExpression qil = null; // Executable command for the compiled stylesheet private XmlILCommand command = null; public XslCompiledTransform() {} public XslCompiledTransform(bool enableDebug) { this.enableDebug = enableDebug; } ////// This function is called on every recompilation to discard all previous results /// private void Reset() { compilerResults = null; outputSettings = null; qil = null; command = null; } internal CompilerErrorCollection Errors { get { return compilerResults != null ? compilerResults.Errors : null; } } ////// Writer settings specified in the stylesheet /// public XmlWriterSettings OutputSettings { get { return outputSettings; } } public TempFileCollection TemporaryFiles { [PermissionSet(SecurityAction.LinkDemand, Name="FullTrust")] get { return compilerResults != null ? compilerResults.TempFiles : null; } } //------------------------------------------------ // Load methods //------------------------------------------------ public void Load(XmlReader stylesheet) { Reset(); LoadInternal(stylesheet, XsltSettings.Default, new XmlUrlResolver()); } public void Load(XmlReader stylesheet, XsltSettings settings, XmlResolver stylesheetResolver) { Reset(); LoadInternal(stylesheet, settings, stylesheetResolver); } public void Load(IXPathNavigable stylesheet) { Reset(); LoadInternal(stylesheet, XsltSettings.Default, new XmlUrlResolver()); } public void Load(IXPathNavigable stylesheet, XsltSettings settings, XmlResolver stylesheetResolver) { Reset(); LoadInternal(stylesheet, settings, stylesheetResolver); } public void Load(string stylesheetUri) { Reset(); if (stylesheetUri == null) { throw new ArgumentNullException("stylesheetUri"); } LoadInternal(stylesheetUri, XsltSettings.Default, new XmlUrlResolver()); } public void Load(string stylesheetUri, XsltSettings settings, XmlResolver stylesheetResolver) { Reset(); if (stylesheetUri == null) { throw new ArgumentNullException("stylesheetUri"); } LoadInternal(stylesheetUri, settings, stylesheetResolver); } private CompilerResults LoadInternal(object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver) { if (stylesheet == null) { throw new ArgumentNullException("stylesheet"); } if (settings == null) { settings = XsltSettings.Default; } CompileXsltToQil(stylesheet, settings, stylesheetResolver); CompilerError error = GetFirstError(); if (error != null) { throw new XslLoadException(error); } if (!settings.CheckOnly) { CompileQilToMsil(settings); } return compilerResults; } private void CompileXsltToQil(object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver) { this.compilerResults = new Compiler(settings, this.enableDebug, null).Compile(stylesheet, stylesheetResolver, out this.qil); } ////// Returns the first compiler error except warnings /// private CompilerError GetFirstError() { foreach (CompilerError error in compilerResults.Errors) { if (!error.IsWarning) { return error; } } return null; } private void CompileQilToMsil(XsltSettings settings) { this.command = new XmlILGenerator().Generate(this.qil, /*typeBuilder:*/null); this.outputSettings = this.command.StaticData.DefaultWriterSettings; this.qil = null; } //------------------------------------------------ // Compile stylesheet to a TypeBuilder //------------------------------------------------ private static ConstructorInfo GeneratedCodeCtor; public static CompilerErrorCollection CompileToType(XmlReader stylesheet, XsltSettings settings, XmlResolver stylesheetResolver, bool debug, TypeBuilder typeBuilder, string scriptAssemblyPath) { if (stylesheet == null) throw new ArgumentNullException("stylesheet"); if (typeBuilder == null) throw new ArgumentNullException("typeBuilder"); if (settings == null) settings = XsltSettings.Default; if (settings.EnableScript && scriptAssemblyPath == null) throw new ArgumentNullException("scriptAssemblyPath"); if (scriptAssemblyPath != null) scriptAssemblyPath = Path.GetFullPath(scriptAssemblyPath); QilExpression qil; CompilerErrorCollection errors = new Compiler(settings, debug, scriptAssemblyPath).Compile(stylesheet, stylesheetResolver, out qil).Errors; if (!errors.HasErrors) { // Mark the type with GeneratedCodeAttribute to identify its origin if (GeneratedCodeCtor == null) GeneratedCodeCtor = typeof(GeneratedCodeAttribute).GetConstructor(new Type[] { typeof(string), typeof(string) }); typeBuilder.SetCustomAttribute(new CustomAttributeBuilder(GeneratedCodeCtor, new object[] { typeof(XslCompiledTransform).FullName, Version })); new XmlILGenerator().Generate(qil, typeBuilder); } return errors; } //------------------------------------------------ // Load compiled stylesheet from a Type //------------------------------------------------ public void Load(Type compiledStylesheet) { Reset(); if (compiledStylesheet == null) throw new ArgumentNullException("compiledStylesheet"); object[] customAttrs = compiledStylesheet.GetCustomAttributes(typeof(GeneratedCodeAttribute), /*inherit:*/false); GeneratedCodeAttribute generatedCodeAttr = customAttrs.Length > 0 ? (GeneratedCodeAttribute)customAttrs[0] : null; // If GeneratedCodeAttribute is not there, it is not a compiled stylesheet class if (generatedCodeAttr != null && generatedCodeAttr.Tool == typeof(XslCompiledTransform).FullName && generatedCodeAttr.Version == Version) { FieldInfo fldData = compiledStylesheet.GetField(XmlQueryStaticData.DataFieldName, BindingFlags.Static | BindingFlags.NonPublic); FieldInfo fldTypes = compiledStylesheet.GetField(XmlQueryStaticData.TypesFieldName, BindingFlags.Static | BindingFlags.NonPublic); // If private fields are not there, it is not a compiled stylesheet class if (fldData != null && fldTypes != null) { // Need MemberAccess reflection permission to access a private data field and create a delegate new ReflectionPermission(ReflectionPermissionFlag.MemberAccess).Assert(); // Check if query static data is already deserialized object value = fldData.GetValue(/*this:*/null); byte[] data = value as byte[]; if (data != null) { lock (data) { // After acquiring the lock check the field again value = fldData.GetValue(/*this:*/null); if (value == data) { // Deserialize query static data and create the command MethodInfo methExec = compiledStylesheet.GetMethod("Execute", BindingFlags.Static | BindingFlags.NonPublic); Delegate delExec = Delegate.CreateDelegate(typeof(ExecuteDelegate), methExec); value = new XmlILCommand((ExecuteDelegate)delExec, new XmlQueryStaticData(data, (Type[])fldTypes.GetValue(/*this:*/null))); // Store the constructed command in the same field System.Threading.Thread.MemoryBarrier(); fldData.SetValue(/*this:*/null, value); } } } this.command = value as XmlILCommand; } } // Throw an exception if the command was not loaded if (this.command == null) throw new ArgumentException(Res.GetString(Res.Xslt_NotCompiledStylesheet, compiledStylesheet.FullName), "compiledStylesheet"); // Otherwise set the OutputSettings property this.outputSettings = this.command.StaticData.DefaultWriterSettings; } public void Load(MethodInfo executeMethod, byte[] queryData, Type[] earlyBoundTypes) { Reset(); if (executeMethod == null) throw new ArgumentNullException("executeMethod"); if (queryData == null) throw new ArgumentNullException("queryData"); // earlyBoundTypes may be null DynamicMethod dm = executeMethod as DynamicMethod; Delegate delExec = (dm != null) ? dm.CreateDelegate(typeof(ExecuteDelegate)) : Delegate.CreateDelegate(typeof(ExecuteDelegate), executeMethod); this.command = new XmlILCommand((ExecuteDelegate)delExec, new XmlQueryStaticData(queryData, earlyBoundTypes)); this.outputSettings = this.command.StaticData.DefaultWriterSettings; } //------------------------------------------------ // Transform methods which take an IXPathNavigable //------------------------------------------------ public void Transform(IXPathNavigable input, XmlWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), (XsltArgumentList)null, results); } public void Transform(IXPathNavigable input, XsltArgumentList arguments, XmlWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } public void Transform(IXPathNavigable input, XsltArgumentList arguments, TextWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } public void Transform(IXPathNavigable input, XsltArgumentList arguments, Stream results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } //------------------------------------------------ // Transform methods which take an XmlReader //------------------------------------------------ public void Transform(XmlReader input, XmlWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), (XsltArgumentList)null, results); } public void Transform(XmlReader input, XsltArgumentList arguments, XmlWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } public void Transform(XmlReader input, XsltArgumentList arguments, TextWriter results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } public void Transform(XmlReader input, XsltArgumentList arguments, Stream results) { CheckCommand(); CheckInput(input); command.Execute(input, new XmlUrlResolver(), arguments, results); } public void Transform(XmlReader input, XsltArgumentList arguments, XmlWriter results, XmlResolver documentResolver) { CheckCommand(); CheckInput(input); command.Execute(input, documentResolver, arguments, results); } //------------------------------------------------ // Transform methods which take a uri //------------------------------------------------ public void Transform(string inputUri, string resultsFile) { CheckCommand(); // SQLBUDT 276415: Prevent wiping out the content of the input file if the output file is the same using (XmlReader input = CreateReader(inputUri)) { if (resultsFile == null) { throw new ArgumentNullException("resultsFile"); } using (FileStream output = new FileStream(resultsFile, FileMode.Create, FileAccess.Write)) { command.Execute(input, new XmlUrlResolver(), (XsltArgumentList)null, output); } } } public void Transform(string inputUri, XmlWriter results) { CheckCommand(); using (XmlReader input = CreateReader(inputUri)) { command.Execute(input, new XmlUrlResolver(), (XsltArgumentList)null, results); } } public void Transform(string inputUri, XsltArgumentList arguments, XmlWriter results) { CheckCommand(); using (XmlReader input = CreateReader(inputUri)) { command.Execute(input, new XmlUrlResolver(), arguments, results); } } public void Transform(string inputUri, XsltArgumentList arguments, TextWriter results) { CheckCommand(); using (XmlReader input = CreateReader(inputUri)) { command.Execute(input, new XmlUrlResolver(), arguments, results); } } public void Transform(string inputUri, XsltArgumentList arguments, Stream results) { CheckCommand(); using (XmlReader input = CreateReader(inputUri)) { command.Execute(input, new XmlUrlResolver(), arguments, results); } } //------------------------------------------------ // Helper methods //------------------------------------------------ private void CheckCommand() { if (command == null) { throw new InvalidOperationException(Res.GetString(Res.Xslt_NoStylesheetLoaded)); } } private void CheckInput(object input) { if (input == null) { throw new System.ArgumentNullException("input"); } } private XmlReader CreateReader(string inputUri) { if (inputUri == null) { throw new ArgumentNullException("inputUri"); } return XmlReader.Create(inputUri); } //------------------------------------------------ // Test suites entry points //------------------------------------------------ private QilExpression TestCompile(object stylesheet, XsltSettings settings, XmlResolver stylesheetResolver) { Reset(); CompileXsltToQil(stylesheet, settings, stylesheetResolver); return qil; } private void TestGenerate(XsltSettings settings) { Debug.Assert(qil != null, "You must compile to Qil first"); CompileQilToMsil(settings); } private void Transform(string inputUri, XsltArgumentList arguments, XmlWriter results, XmlResolver documentResolver) { command.Execute(inputUri, documentResolver, arguments, results); } internal static void PrintQil(object qil, XmlWriter xw, bool printComments, bool printTypes, bool printLineInfo) { QilExpression qilExpr = (QilExpression)qil; QilXmlWriter.Options options = QilXmlWriter.Options.None; QilValidationVisitor.Validate(qilExpr); if (printComments) options |= QilXmlWriter.Options.Annotations; if (printTypes) options |= QilXmlWriter.Options.TypeInfo; if (printLineInfo) options |= QilXmlWriter.Options.LineInfo; QilXmlWriter qw = new QilXmlWriter(xw, options); qw.ToXml(qilExpr); xw.Flush(); } } #endif // ! HIDE_XSL } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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