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//------------------------------------------------------------------------------
// <copyright file="WebCodeGenerator.cs" company="Microsoft">
// Copyright (c) Microsoft Corporation. All rights reserved.
// </copyright>
//------------------------------------------------------------------------------
namespace System.Web.Services.Description {
using System;
using System.Globalization;
using System.Collections;
using System.IO;
using System.CodeDom;
using System.CodeDom.Compiler;
using System.Diagnostics;
using System.Reflection;
using System.ComponentModel;
using System.Xml.Serialization;
using System.Threading;
using System.Web.Services.Protocols;
internal enum CodeFlags {
IsPublic = 0x1,
IsAbstract = 0x2,
IsStruct = 0x4,
IsNew = 0x8,
IsByRef = 0x10,
IsOut = 0x20,
IsInterface = 0x40
}
internal class WebCodeGenerator {
private static CodeAttributeDeclaration generatedCodeAttribute;
private WebCodeGenerator() { }
internal static CodeAttributeDeclaration GeneratedCodeAttribute {
get {
if (generatedCodeAttribute == null) {
CodeAttributeDeclaration decl = new CodeAttributeDeclaration(typeof(GeneratedCodeAttribute).FullName);
Assembly a = Assembly.GetEntryAssembly();
if (a == null) {
a = Assembly.GetExecutingAssembly();
if (a == null) {
a = typeof(WebCodeGenerator).Assembly;
}
}
AssemblyName assemblyName = a.GetName();
decl.Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(assemblyName.Name)));
string version = GetProductVersion(a);
decl.Arguments.Add(new CodeAttributeArgument(new CodePrimitiveExpression(version == null ? assemblyName.Version.ToString() : version)));
generatedCodeAttribute = decl;
}
return generatedCodeAttribute;
}
}
private static string GetProductVersion(Assembly assembly) {
object[] attributes = assembly.GetCustomAttributes(true);
for ( int i = 0; i < attributes.Length; i++ ) {
if (attributes[i] is AssemblyInformationalVersionAttribute) {
AssemblyInformationalVersionAttribute version = (AssemblyInformationalVersionAttribute)attributes[i];
return version.InformationalVersion;
}
}
return null;
}
internal static string[] GetNamespacesForTypes(Type[] types) {
Hashtable names = new Hashtable();
for (int i = 0; i < types.Length; i++) {
string name = types[i].FullName;
int dot = name.LastIndexOf('.');
if (dot > 0)
names[name.Substring(0, dot)] = types[i];
}
string[] ns = new string[names.Keys.Count];
names.Keys.CopyTo(ns, 0);
return ns;
}
internal static void AddImports(CodeNamespace codeNamespace, string[] namespaces) {
Debug.Assert(codeNamespace != null, "Inalid (null) CodeNamespace");
foreach (string ns in namespaces)
codeNamespace.Imports.Add(new CodeNamespaceImport(ns));
}
static CodeMemberProperty CreatePropertyDeclaration(CodeMemberField field, string name, string typeName) {
CodeMemberProperty prop = new CodeMemberProperty();
prop.Type = new CodeTypeReference(typeName);
prop.Name = name;
//add get
CodeMethodReturnStatement ret = new CodeMethodReturnStatement();
ret.Expression = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), field.Name);
prop.GetStatements.Add(ret);
CodeExpression left = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), field.Name);
CodeExpression right = new CodeArgumentReferenceExpression("value");
prop.SetStatements.Add(new CodeAssignStatement(left, right));
return prop;
}
internal static CodeTypeMember AddMember(CodeTypeDeclaration codeClass, string typeName, string memberName, CodeExpression initializer, CodeAttributeDeclarationCollection metadata, CodeFlags flags, CodeGenerationOptions options) {
CodeTypeMember member;
bool generateProperty = (options & CodeGenerationOptions.GenerateProperties) != 0;
string fieldName = generateProperty ? MakeFieldName(memberName) : memberName;
CodeMemberField field = new CodeMemberField(typeName, fieldName);
field.InitExpression = initializer;
if (generateProperty) {
codeClass.Members.Add(field);
member = CreatePropertyDeclaration(field, memberName, typeName);
}
else {
member = field;
}
member.CustomAttributes = metadata;
if ((flags & CodeFlags.IsPublic) != 0)
member.Attributes = (field.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
codeClass.Members.Add(member);
return member;
}
internal static string FullTypeName(XmlMemberMapping mapping, CodeDomProvider codeProvider) {
return mapping.GenerateTypeName(codeProvider);
}
static string MakeFieldName(string name) {
return CodeIdentifier.MakeCamel(name) + "Field";
}
internal static CodeConstructor AddConstructor(CodeTypeDeclaration codeClass, string[] parameterTypeNames, string[] parameterNames, CodeAttributeDeclarationCollection metadata, CodeFlags flags) {
CodeConstructor ctor = new CodeConstructor();
if ((flags & CodeFlags.IsPublic) != 0)
ctor.Attributes = (ctor.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
if ((flags & CodeFlags.IsAbstract) != 0)
ctor.Attributes |= MemberAttributes.Abstract;
ctor.CustomAttributes = metadata;
Debug.Assert(parameterTypeNames.Length == parameterNames.Length, "invalid set of parameters");
for (int i = 0; i < parameterTypeNames.Length; i++) {
CodeParameterDeclarationExpression param = new CodeParameterDeclarationExpression(parameterTypeNames[i], parameterNames[i]);
ctor.Parameters.Add(param);
}
codeClass.Members.Add(ctor);
return ctor;
}
internal static CodeMemberMethod AddMethod(CodeTypeDeclaration codeClass, string methodName,
CodeFlags[] parameterFlags, string[] parameterTypeNames, string[] parameterNames,
string returnTypeName, CodeAttributeDeclarationCollection metadata, CodeFlags flags) {
return AddMethod(codeClass, methodName, parameterFlags,
parameterTypeNames, parameterNames, new CodeAttributeDeclarationCollection[0],
returnTypeName, metadata, flags);
}
internal static CodeMemberMethod AddMethod(CodeTypeDeclaration codeClass, string methodName,
CodeFlags[] parameterFlags, string[] parameterTypeNames, string[] parameterNames,
CodeAttributeDeclarationCollection[] parameterAttributes, string returnTypeName, CodeAttributeDeclarationCollection metadata, CodeFlags flags) {
CodeMemberMethod method = new CodeMemberMethod();
method.Name = methodName;
method.ReturnType = new CodeTypeReference(returnTypeName);
method.CustomAttributes = metadata;
if ((flags & CodeFlags.IsPublic) != 0)
method.Attributes = (method.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
if ((flags & CodeFlags.IsAbstract) != 0)
method.Attributes = (method.Attributes & ~MemberAttributes.ScopeMask) | MemberAttributes.Abstract;
if ((flags & CodeFlags.IsNew) != 0)
method.Attributes = (method.Attributes & ~MemberAttributes.VTableMask) | MemberAttributes.New;
Debug.Assert(parameterFlags.Length == parameterTypeNames.Length && parameterTypeNames.Length == parameterNames.Length, "invalid set of parameters");
for (int i = 0; i < parameterNames.Length; i++) {
CodeParameterDeclarationExpression param = new CodeParameterDeclarationExpression(parameterTypeNames[i], parameterNames[i]);
if ((parameterFlags[i] & CodeFlags.IsByRef) != 0)
param.Direction = FieldDirection.Ref;
else if ((parameterFlags[i] & CodeFlags.IsOut) != 0)
param.Direction = FieldDirection.Out;
if (i < parameterAttributes.Length) {
param.CustomAttributes = parameterAttributes[i];
}
method.Parameters.Add(param);
}
codeClass.Members.Add(method);
return method;
}
internal static CodeTypeDeclaration AddClass(CodeNamespace codeNamespace, string className, string baseClassName, string[] implementedInterfaceNames, CodeAttributeDeclarationCollection metadata, CodeFlags flags, bool isPartial) {
CodeTypeDeclaration codeClass = CreateClass(className, baseClassName, implementedInterfaceNames, metadata, flags, isPartial);
codeNamespace.Types.Add(codeClass);
return codeClass;
}
internal static CodeTypeDeclaration CreateClass(string className, string baseClassName, string[] implementedInterfaceNames, CodeAttributeDeclarationCollection metadata, CodeFlags flags, bool isPartial) {
CodeTypeDeclaration codeClass = new CodeTypeDeclaration(className);
if (baseClassName != null && baseClassName.Length > 0)
codeClass.BaseTypes.Add(baseClassName);
foreach (string interfaceName in implementedInterfaceNames)
codeClass.BaseTypes.Add(interfaceName);
codeClass.IsStruct = (flags & CodeFlags.IsStruct) != 0;
if ((flags & CodeFlags.IsPublic) != 0)
codeClass.TypeAttributes |= TypeAttributes.Public;
else
codeClass.TypeAttributes &= ~TypeAttributes.Public;
if ((flags & CodeFlags.IsAbstract) != 0)
codeClass.TypeAttributes |= TypeAttributes.Abstract;
else
codeClass.TypeAttributes &= ~TypeAttributes.Abstract;
if ((flags & CodeFlags.IsInterface) != 0)
codeClass.IsInterface = true;
else
codeClass.IsPartial = isPartial;
codeClass.CustomAttributes = metadata;
codeClass.CustomAttributes.Add(GeneratedCodeAttribute);
return codeClass;
}
internal static CodeAttributeDeclarationCollection AddCustomAttribute(CodeAttributeDeclarationCollection metadata, Type type, CodeAttributeArgument[] arguments) {
if (metadata == null) metadata = new CodeAttributeDeclarationCollection();
CodeAttributeDeclaration attribute = new CodeAttributeDeclaration(type.FullName, arguments);
metadata.Add(attribute);
return metadata;
}
internal static CodeAttributeDeclarationCollection AddCustomAttribute(CodeAttributeDeclarationCollection metadata, Type type, CodeExpression[] arguments) {
return AddCustomAttribute(metadata, type, arguments, new string[0], new CodeExpression[0]);
}
internal static CodeAttributeDeclarationCollection AddCustomAttribute(CodeAttributeDeclarationCollection metadata, Type type, CodeExpression[] parameters, string[] propNames, CodeExpression[] propValues) {
Debug.Assert(propNames.Length == propValues.Length, "propNames.Length != propValues.Length");
int count = (parameters == null ? 0 : parameters.Length) + (propNames == null ? 0 : propNames.Length);
CodeAttributeArgument[] arguments = new CodeAttributeArgument[count];
for (int i = 0; i < parameters.Length; i++)
arguments[i] = new CodeAttributeArgument(null, parameters[i]);
for (int i = 0; i < propNames.Length; i++)
arguments[parameters.Length + i] = new CodeAttributeArgument(propNames[i], propValues[i]);
return AddCustomAttribute(metadata, type, arguments);
}
// public event xxxCompletedEventHandler xxxCompleted;
internal static void AddEvent(CodeTypeMemberCollection members, string handlerType, string handlerName) {
CodeMemberEvent eventCompleted = new CodeMemberEvent();
eventCompleted.Type = new CodeTypeReference(handlerType);
eventCompleted.Name = handlerName;
eventCompleted.Attributes = (eventCompleted.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
eventCompleted.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
members.Add(eventCompleted);
}
// public delegate void xxxCompletedEventHandler(object sender, System.ComponentModel.AsyncCompletedEventArgs args);
internal static void AddDelegate(CodeTypeDeclarationCollection codeClasses, string handlerType, string handlerArgs) {
CodeTypeDelegate handler = new CodeTypeDelegate(handlerType);
handler.CustomAttributes.Add(GeneratedCodeAttribute);
handler.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "sender"));
handler.Parameters.Add(new CodeParameterDeclarationExpression(handlerArgs, "e"));
handler.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
codeClasses.Add(handler);
}
// private SendOrPostCallback xxxOperationCompleted;
internal static void AddCallbackDeclaration(CodeTypeMemberCollection members, string callbackMember) {
CodeMemberField callback = new CodeMemberField();
callback.Type = new CodeTypeReference(typeof(SendOrPostCallback));
callback.Name = callbackMember;
members.Add(callback);
}
// private void On_xxx_OperationCompleted(object arg) {..}
internal static void AddCallbackImplementation(CodeTypeDeclaration codeClass, string callbackName, string handlerName, string handlerArgs, bool methodHasOutParameters) {
CodeMemberMethod asyncCompleted = WebCodeGenerator.AddMethod(codeClass, callbackName,
new CodeFlags[1] { 0 }, new string[] { typeof(object).FullName }, new string[] { "arg" },
typeof(void).FullName, null, 0);
CodeEventReferenceExpression member = new CodeEventReferenceExpression(new CodeThisReferenceExpression(), handlerName);
CodeBinaryOperatorExpression checkIfNull = new CodeBinaryOperatorExpression(member, CodeBinaryOperatorType.IdentityInequality, new CodePrimitiveExpression(null));
CodeStatement[] trueStatements = new CodeStatement[2];
trueStatements[0] = new CodeVariableDeclarationStatement(typeof(InvokeCompletedEventArgs), "invokeArgs", new CodeCastExpression(typeof(InvokeCompletedEventArgs), new CodeArgumentReferenceExpression("arg")));
CodeVariableReferenceExpression invokeArgs = new CodeVariableReferenceExpression("invokeArgs");
CodeObjectCreateExpression create = new CodeObjectCreateExpression();
if (methodHasOutParameters) {
create.CreateType = new CodeTypeReference(handlerArgs);
create.Parameters.Add(new CodePropertyReferenceExpression(invokeArgs, "Results"));
}
else {
create.CreateType = new CodeTypeReference(typeof(AsyncCompletedEventArgs));
}
create.Parameters.Add(new CodePropertyReferenceExpression(invokeArgs, "Error"));
create.Parameters.Add(new CodePropertyReferenceExpression(invokeArgs, "Cancelled"));
create.Parameters.Add(new CodePropertyReferenceExpression(invokeArgs, "UserState"));
trueStatements[1] = new CodeExpressionStatement(new CodeDelegateInvokeExpression(new CodeEventReferenceExpression(new CodeThisReferenceExpression(), handlerName), new CodeExpression[] { new CodeThisReferenceExpression(), create }));
asyncCompleted.Statements.Add(new CodeConditionStatement(checkIfNull, trueStatements, new CodeStatement[0]));
}
internal static CodeMemberMethod AddAsyncMethod(CodeTypeDeclaration codeClass, string methodName,
string[] parameterTypeNames, string[] parameterNames, string callbackMember, string callbackName, string userState) {
CodeMemberMethod asyncCodeMethod = WebCodeGenerator.AddMethod(codeClass, methodName,
new CodeFlags[parameterNames.Length], parameterTypeNames, parameterNames, typeof(void).FullName, null, CodeFlags.IsPublic);
asyncCodeMethod.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
CodeMethodInvokeExpression invoke = new CodeMethodInvokeExpression(new CodeThisReferenceExpression(), methodName);
for (int i = 0; i < parameterNames.Length; i++) {
invoke.Parameters.Add(new CodeArgumentReferenceExpression(parameterNames[i]));
}
invoke.Parameters.Add(new CodePrimitiveExpression(null));
asyncCodeMethod.Statements.Add(invoke);
asyncCodeMethod = WebCodeGenerator.AddMethod(codeClass, methodName,
new CodeFlags[parameterNames.Length], parameterTypeNames, parameterNames, typeof(void).FullName, null, CodeFlags.IsPublic);
asyncCodeMethod.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
asyncCodeMethod.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), userState));
CodeFieldReferenceExpression member = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), callbackMember);
CodeBinaryOperatorExpression checkIfNull = new CodeBinaryOperatorExpression(member, CodeBinaryOperatorType.IdentityEquality, new CodePrimitiveExpression(null));
CodeDelegateCreateExpression createDelegate = new CodeDelegateCreateExpression();
createDelegate.DelegateType = new CodeTypeReference(typeof(SendOrPostCallback));
createDelegate.TargetObject = new CodeThisReferenceExpression();
createDelegate.MethodName = callbackName;
CodeStatement[] trueStatements = new CodeStatement[] { new CodeAssignStatement(member, createDelegate) };
asyncCodeMethod.Statements.Add(new CodeConditionStatement(checkIfNull, trueStatements, new CodeStatement[0]));
return asyncCodeMethod;
}
internal static CodeTypeDeclaration CreateArgsClass(string name, string[] paramTypes, string[] paramNames, bool isPartial) {
CodeTypeDeclaration codeClass = new CodeTypeDeclaration(name);
codeClass.CustomAttributes.Add(GeneratedCodeAttribute);
// Add [DebuggerStepThrough]
codeClass.CustomAttributes.Add(new CodeAttributeDeclaration(typeof(DebuggerStepThroughAttribute).FullName));
// Add [DesignerCategory("code")]
codeClass.CustomAttributes.Add(new CodeAttributeDeclaration(typeof(DesignerCategoryAttribute).FullName, new CodeAttributeArgument[] { new CodeAttributeArgument(new CodePrimitiveExpression("code")) }));
codeClass.IsPartial = isPartial;
codeClass.BaseTypes.Add(new CodeTypeReference(typeof(AsyncCompletedEventArgs)));
CodeIdentifiers identifiers = new CodeIdentifiers();
identifiers.AddUnique("Error", "Error");
identifiers.AddUnique("Cancelled", "Cancelled");
identifiers.AddUnique("UserState", "UserState");
for (int i = 0; i < paramNames.Length; i++) {
if (paramNames[i] != null) {
identifiers.AddUnique(paramNames[i], paramNames[i]);
}
}
string results = identifiers.AddUnique("results", "results");
CodeMemberField data = new CodeMemberField(typeof(object[]), results);
codeClass.Members.Add(data);
CodeConstructor ctor = new CodeConstructor();
ctor.Attributes = (ctor.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Assembly;
CodeParameterDeclarationExpression param = new CodeParameterDeclarationExpression(typeof(object[]), results);
ctor.Parameters.Add(param);
ctor.Parameters.Add(new CodeParameterDeclarationExpression(typeof(Exception), "exception"));
ctor.Parameters.Add(new CodeParameterDeclarationExpression(typeof(bool), "cancelled"));
ctor.Parameters.Add(new CodeParameterDeclarationExpression(typeof(object), "userState"));
ctor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("exception"));
ctor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("cancelled"));
ctor.BaseConstructorArgs.Add(new CodeArgumentReferenceExpression("userState"));
ctor.Statements.Add(new CodeAssignStatement(new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), data.Name), new CodeArgumentReferenceExpression(results)));
codeClass.Members.Add(ctor);
int index = 0;
for (int i = 0; i < paramNames.Length; i++) {
if (paramNames[i] != null) {
codeClass.Members.Add(CreatePropertyDeclaration(data, paramNames[i], paramTypes[i], index++));
}
}
codeClass.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
return codeClass;
}
static CodeMemberProperty CreatePropertyDeclaration(CodeMemberField field, string name, string typeName, int index) {
CodeMemberProperty prop = new CodeMemberProperty();
prop.Type = new CodeTypeReference(typeName);
prop.Name = name;
prop.Attributes = (prop.Attributes & ~MemberAttributes.AccessMask) | MemberAttributes.Public;
//add get
prop.GetStatements.Add(new CodeMethodInvokeExpression(new CodeThisReferenceExpression(), "RaiseExceptionIfNecessary", new CodeExpression[0]));
CodeArrayIndexerExpression valueRef = new CodeArrayIndexerExpression();
valueRef.TargetObject = new CodeFieldReferenceExpression(new CodeThisReferenceExpression(), field.Name);
valueRef.Indices.Add(new CodePrimitiveExpression(index));
CodeMethodReturnStatement ret = new CodeMethodReturnStatement();
ret.Expression = new CodeCastExpression(typeName, valueRef);
prop.GetStatements.Add(ret);
prop.Comments.Add(new CodeCommentStatement(Res.GetString(Res.CodeRemarks), true));
return prop;
}
}
}
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