Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Core / System / Linq / SequenceQuery.cs / 1305376 / SequenceQuery.cs
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
// Include Silverlight's managed resources
#if SILVERLIGHT
using System.Core;
#endif //SILVERLIGHT
namespace System.Linq {
// Must remain public for Silverlight
public abstract class EnumerableQuery {
internal abstract Expression Expression { get; }
internal abstract IEnumerable Enumerable { get; }
internal static IQueryable Create(Type elementType, IEnumerable sequence){
Type seqType = typeof(EnumerableQuery<>).MakeGenericType(elementType);
#if SILVERLIGHT
return (IQueryable) Activator.CreateInstance(seqType, sequence);
#else
return (IQueryable) Activator.CreateInstance(seqType, BindingFlags.Instance|BindingFlags.Public|BindingFlags.NonPublic, null, new object[] {sequence}, null);
#endif //SILVERLIGHT
}
internal static IQueryable Create(Type elementType, Expression expression) {
Type seqType = typeof(EnumerableQuery<>).MakeGenericType(elementType);
#if SILVERLIGHT
return (IQueryable) Activator.CreateInstance(seqType, expression);
#else
return (IQueryable) Activator.CreateInstance(seqType, BindingFlags.Instance|BindingFlags.Public|BindingFlags.NonPublic, null, new object[] {expression}, null);
#endif //SILVERLIGHT
}
}
// Must remain public for Silverlight
public class EnumerableQuery : EnumerableQuery, IOrderedQueryable, IQueryable, IQueryProvider, IEnumerable, IEnumerable {
Expression expression;
IEnumerable enumerable;
IQueryProvider IQueryable.Provider {
get{
return (IQueryProvider)this;
}
}
// Must remain public for Silverlight
public EnumerableQuery(IEnumerable enumerable) {
this.enumerable = enumerable;
this.expression = Expression.Constant(this);
}
// Must remain public for Silverlight
public EnumerableQuery(Expression expression) {
this.expression = expression;
}
internal override Expression Expression {
get { return this.expression; }
}
internal override IEnumerable Enumerable {
get { return this.enumerable; }
}
Expression IQueryable.Expression {
get { return this.expression; }
}
Type IQueryable.ElementType {
get { return typeof(T); }
}
IQueryable IQueryProvider.CreateQuery(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
Type iqType = TypeHelper.FindGenericType(typeof(IQueryable<>), expression.Type);
if (iqType == null)
throw Error.ArgumentNotValid("expression");
return EnumerableQuery.Create(iqType.GetGenericArguments()[0], expression);
}
IQueryable IQueryProvider.CreateQuery(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
if (!typeof(IQueryable).IsAssignableFrom(expression.Type)){
throw Error.ArgumentNotValid("expression");
}
return new EnumerableQuery(expression);
}
// Baselining as Safe for Mix demo so that interface can be transparent. Marking this
// critical (which was the original annotation when porting to silverlight) would violate
// fxcop security rules if the interface isn't also critical. However, transparent code
// can't access this anyway for Mix since we're not exposing AsQueryable().
// [....]: the above assertion no longer holds. Now making AsQueryable() public again
// the security fallout of which will need to be re-examined.
object IQueryProvider.Execute(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
Type execType = typeof(EnumerableExecutor<>).MakeGenericType(expression.Type);
return EnumerableExecutor.Create(expression).ExecuteBoxed();
}
// see above
S IQueryProvider.Execute(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
if (!typeof(S).IsAssignableFrom(expression.Type))
throw Error.ArgumentNotValid("expression");
return new EnumerableExecutor(expression).Execute();
}
IEnumerator IEnumerable.GetEnumerator() {
return this.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator() {
return this.GetEnumerator();
}
IEnumerator GetEnumerator() {
if (this.enumerable == null) {
EnumerableRewriter rewriter = new EnumerableRewriter();
Expression body = rewriter.Visit(this.expression);
Expression>> f = Expression.Lambda>>(body, (IEnumerable)null);
this.enumerable = f.Compile()();
}
return this.enumerable.GetEnumerator();
}
public override string ToString() {
ConstantExpression c = this.expression as ConstantExpression;
if (c != null && c.Value == this) {
if (this.enumerable != null)
return this.enumerable.ToString();
return "null";
}
return this.expression.ToString();
}
}
// Must remain public for Silverlight
public abstract class EnumerableExecutor {
internal abstract object ExecuteBoxed();
internal static EnumerableExecutor Create(Expression expression) {
Type execType = typeof(EnumerableExecutor<>).MakeGenericType(expression.Type);
#if SILVERLIGHT
return (EnumerableExecutor)Activator.CreateInstance(execType, expression);
#else
return (EnumerableExecutor)Activator.CreateInstance(execType, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new object[] { expression }, null);
#endif //SILVERLIGHT
}
}
// Must remain public for Silverlight
public class EnumerableExecutor : EnumerableExecutor{
Expression expression;
Func func;
// Must remain public for Silverlight
public EnumerableExecutor(Expression expression){
this.expression = expression;
}
internal override object ExecuteBoxed() {
return this.Execute();
}
internal T Execute(){
if (this.func == null){
EnumerableRewriter rewriter = new EnumerableRewriter();
Expression body = rewriter.Visit(this.expression);
Expression> f = Expression.Lambda>(body, (IEnumerable)null);
this.func = f.Compile();
}
return this.func();
}
}
//
internal class EnumerableRewriter : OldExpressionVisitor {
internal EnumerableRewriter() {
}
internal override Expression VisitMethodCall(MethodCallExpression m) {
Expression obj = this.Visit(m.Object);
ReadOnlyCollection args = this.VisitExpressionList(m.Arguments);
// check for args changed
if (obj != m.Object || args != m.Arguments) {
Expression[] argArray = args.ToArray();
Type[] typeArgs = (m.Method.IsGenericMethod) ? m.Method.GetGenericArguments() : null;
if ((m.Method.IsStatic || m.Method.DeclaringType.IsAssignableFrom(obj.Type))
&& ArgsMatch(m.Method, args, typeArgs)) {
// current method is still valid
return Expression.Call(obj, m.Method, args);
}
else if (m.Method.DeclaringType == typeof(Queryable)) {
// convert Queryable method to Enumerable method
MethodInfo seqMethod = FindEnumerableMethod(m.Method.Name, args, typeArgs);
args = this.FixupQuotedArgs(seqMethod, args);
return Expression.Call(obj, seqMethod, args);
}
else {
// rebind to new method
BindingFlags flags = BindingFlags.Static | (m.Method.IsPublic ? BindingFlags.Public : BindingFlags.NonPublic);
MethodInfo method = FindMethod(m.Method.DeclaringType, m.Method.Name, args, typeArgs, flags);
args = this.FixupQuotedArgs(method, args);
return Expression.Call(obj, method, args);
}
}
return m;
}
private ReadOnlyCollection FixupQuotedArgs(MethodInfo mi, ReadOnlyCollection argList) {
ParameterInfo[] pis = mi.GetParameters();
if (pis.Length > 0) {
List newArgs = null;
for (int i = 0, n = pis.Length; i < n; i++) {
Expression arg = argList[i];
ParameterInfo pi = pis[i];
arg = FixupQuotedExpression(pi.ParameterType, arg);
if (newArgs == null && arg != argList[i]) {
newArgs = new List(argList.Count);
for (int j = 0; j < i; j++) {
newArgs.Add(argList[j]);
}
}
if (newArgs != null) {
newArgs.Add(arg);
}
}
if (newArgs != null)
argList = newArgs.ToReadOnlyCollection();
}
return argList;
}
private Expression FixupQuotedExpression(Type type, Expression expression) {
Expression expr = expression;
while (true) {
if (type.IsAssignableFrom(expr.Type))
return expr;
if (expr.NodeType != ExpressionType.Quote)
break;
expr = ((UnaryExpression)expr).Operand;
}
if (!type.IsAssignableFrom(expr.Type) && type.IsArray && expr.NodeType == ExpressionType.NewArrayInit) {
Type strippedType = StripExpression(expr.Type);
if (type.IsAssignableFrom(strippedType)) {
Type elementType = type.GetElementType();
NewArrayExpression na = (NewArrayExpression)expr;
List exprs = new List(na.Expressions.Count);
for (int i = 0, n = na.Expressions.Count; i < n; i++) {
exprs.Add(this.FixupQuotedExpression(elementType, na.Expressions[i]));
}
expression = Expression.NewArrayInit(elementType, exprs);
}
}
return expression;
}
internal override Expression VisitLambda(LambdaExpression lambda) {
return lambda;
}
private static Type GetPublicType(Type t)
{
// If we create a constant explicitly typed to be a private nested type,
// such as Lookup<,>.Grouping or a compiler-generated iterator class, then
// we cannot use the expression tree in a context which has only execution
// permissions. We should endeavour to translate constants into
// new constants which have public types.
if (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Lookup<,>.Grouping))
return typeof(IGrouping<,>).MakeGenericType(t.GetGenericArguments());
if (!t.IsNestedPrivate)
return t;
foreach (Type iType in t.GetInterfaces())
{
if (iType.IsGenericType && iType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
return iType;
}
if (typeof(IEnumerable).IsAssignableFrom(t))
return typeof(IEnumerable);
return t;
}
internal override Expression VisitConstant(ConstantExpression c) {
EnumerableQuery sq = c.Value as EnumerableQuery;
if (sq != null) {
if (sq.Enumerable != null)
{
Type t = GetPublicType(sq.Enumerable.GetType());
return Expression.Constant(sq.Enumerable, t);
}
return this.Visit(sq.Expression);
}
return c;
}
internal override Expression VisitParameter(ParameterExpression p) {
return p;
}
private static ILookup _seqMethods;
static MethodInfo FindEnumerableMethod(string name, ReadOnlyCollection args, params Type[] typeArgs) {
if (_seqMethods == null) {
_seqMethods = typeof(Enumerable).GetMethods(BindingFlags.Static|BindingFlags.Public).ToLookup(m => m.Name);
}
MethodInfo mi = _seqMethods[name].FirstOrDefault(m => ArgsMatch(m, args, typeArgs));
if (mi == null)
throw Error.NoMethodOnTypeMatchingArguments(name, typeof(Enumerable));
if (typeArgs != null)
return mi.MakeGenericMethod(typeArgs);
return mi;
}
internal static MethodInfo FindMethod(Type type, string name, ReadOnlyCollection args, Type[] typeArgs, BindingFlags flags) {
MethodInfo[] methods = type.GetMethods(flags).Where(m => m.Name == name).ToArray();
if (methods.Length == 0)
throw Error.NoMethodOnType(name, type);
MethodInfo mi = methods.FirstOrDefault(m => ArgsMatch(m, args, typeArgs));
if (mi == null)
throw Error.NoMethodOnTypeMatchingArguments(name, type);
if (typeArgs != null)
return mi.MakeGenericMethod(typeArgs);
return mi;
}
private static bool ArgsMatch(MethodInfo m, ReadOnlyCollection args, Type[] typeArgs) {
ParameterInfo[] mParams = m.GetParameters();
if (mParams.Length != args.Count)
return false;
if (!m.IsGenericMethod && typeArgs != null && typeArgs.Length > 0) {
return false;
}
if (!m.IsGenericMethodDefinition && m.IsGenericMethod && m.ContainsGenericParameters) {
m = m.GetGenericMethodDefinition();
}
if (m.IsGenericMethodDefinition) {
if (typeArgs == null || typeArgs.Length == 0)
return false;
if (m.GetGenericArguments().Length != typeArgs.Length)
return false;
m = m.MakeGenericMethod(typeArgs);
mParams = m.GetParameters();
}
for (int i = 0, n = args.Count; i < n; i++) {
Type parameterType = mParams[i].ParameterType;
if (parameterType == null)
return false;
if (parameterType.IsByRef)
parameterType = parameterType.GetElementType();
Expression arg = args[i];
if (!parameterType.IsAssignableFrom(arg.Type)) {
if (arg.NodeType == ExpressionType.Quote) {
arg = ((UnaryExpression)arg).Operand;
}
if (!parameterType.IsAssignableFrom(arg.Type) &&
!parameterType.IsAssignableFrom(StripExpression(arg.Type))) {
return false;
}
}
}
return true;
}
private static Type StripExpression(Type type) {
bool isArray = type.IsArray;
Type tmp = isArray ? type.GetElementType() : type;
Type eType = TypeHelper.FindGenericType(typeof(Expression<>), tmp);
if (eType != null)
tmp = eType.GetGenericArguments()[0];
if (isArray) {
int rank = type.GetArrayRank();
return (rank == 1) ? tmp.MakeArrayType() : tmp.MakeArrayType(rank);
}
return type;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
// Include Silverlight's managed resources
#if SILVERLIGHT
using System.Core;
#endif //SILVERLIGHT
namespace System.Linq {
// Must remain public for Silverlight
public abstract class EnumerableQuery {
internal abstract Expression Expression { get; }
internal abstract IEnumerable Enumerable { get; }
internal static IQueryable Create(Type elementType, IEnumerable sequence){
Type seqType = typeof(EnumerableQuery<>).MakeGenericType(elementType);
#if SILVERLIGHT
return (IQueryable) Activator.CreateInstance(seqType, sequence);
#else
return (IQueryable) Activator.CreateInstance(seqType, BindingFlags.Instance|BindingFlags.Public|BindingFlags.NonPublic, null, new object[] {sequence}, null);
#endif //SILVERLIGHT
}
internal static IQueryable Create(Type elementType, Expression expression) {
Type seqType = typeof(EnumerableQuery<>).MakeGenericType(elementType);
#if SILVERLIGHT
return (IQueryable) Activator.CreateInstance(seqType, expression);
#else
return (IQueryable) Activator.CreateInstance(seqType, BindingFlags.Instance|BindingFlags.Public|BindingFlags.NonPublic, null, new object[] {expression}, null);
#endif //SILVERLIGHT
}
}
// Must remain public for Silverlight
public class EnumerableQuery : EnumerableQuery, IOrderedQueryable, IQueryable, IQueryProvider, IEnumerable, IEnumerable {
Expression expression;
IEnumerable enumerable;
IQueryProvider IQueryable.Provider {
get{
return (IQueryProvider)this;
}
}
// Must remain public for Silverlight
public EnumerableQuery(IEnumerable enumerable) {
this.enumerable = enumerable;
this.expression = Expression.Constant(this);
}
// Must remain public for Silverlight
public EnumerableQuery(Expression expression) {
this.expression = expression;
}
internal override Expression Expression {
get { return this.expression; }
}
internal override IEnumerable Enumerable {
get { return this.enumerable; }
}
Expression IQueryable.Expression {
get { return this.expression; }
}
Type IQueryable.ElementType {
get { return typeof(T); }
}
IQueryable IQueryProvider.CreateQuery(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
Type iqType = TypeHelper.FindGenericType(typeof(IQueryable<>), expression.Type);
if (iqType == null)
throw Error.ArgumentNotValid("expression");
return EnumerableQuery.Create(iqType.GetGenericArguments()[0], expression);
}
IQueryable IQueryProvider.CreateQuery(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
if (!typeof(IQueryable).IsAssignableFrom(expression.Type)){
throw Error.ArgumentNotValid("expression");
}
return new EnumerableQuery(expression);
}
// Baselining as Safe for Mix demo so that interface can be transparent. Marking this
// critical (which was the original annotation when porting to silverlight) would violate
// fxcop security rules if the interface isn't also critical. However, transparent code
// can't access this anyway for Mix since we're not exposing AsQueryable().
// [....]: the above assertion no longer holds. Now making AsQueryable() public again
// the security fallout of which will need to be re-examined.
object IQueryProvider.Execute(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
Type execType = typeof(EnumerableExecutor<>).MakeGenericType(expression.Type);
return EnumerableExecutor.Create(expression).ExecuteBoxed();
}
// see above
S IQueryProvider.Execute(Expression expression){
if (expression == null)
throw Error.ArgumentNull("expression");
if (!typeof(S).IsAssignableFrom(expression.Type))
throw Error.ArgumentNotValid("expression");
return new EnumerableExecutor(expression).Execute();
}
IEnumerator IEnumerable.GetEnumerator() {
return this.GetEnumerator();
}
IEnumerator IEnumerable.GetEnumerator() {
return this.GetEnumerator();
}
IEnumerator GetEnumerator() {
if (this.enumerable == null) {
EnumerableRewriter rewriter = new EnumerableRewriter();
Expression body = rewriter.Visit(this.expression);
Expression>> f = Expression.Lambda>>(body, (IEnumerable)null);
this.enumerable = f.Compile()();
}
return this.enumerable.GetEnumerator();
}
public override string ToString() {
ConstantExpression c = this.expression as ConstantExpression;
if (c != null && c.Value == this) {
if (this.enumerable != null)
return this.enumerable.ToString();
return "null";
}
return this.expression.ToString();
}
}
// Must remain public for Silverlight
public abstract class EnumerableExecutor {
internal abstract object ExecuteBoxed();
internal static EnumerableExecutor Create(Expression expression) {
Type execType = typeof(EnumerableExecutor<>).MakeGenericType(expression.Type);
#if SILVERLIGHT
return (EnumerableExecutor)Activator.CreateInstance(execType, expression);
#else
return (EnumerableExecutor)Activator.CreateInstance(execType, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new object[] { expression }, null);
#endif //SILVERLIGHT
}
}
// Must remain public for Silverlight
public class EnumerableExecutor : EnumerableExecutor{
Expression expression;
Func func;
// Must remain public for Silverlight
public EnumerableExecutor(Expression expression){
this.expression = expression;
}
internal override object ExecuteBoxed() {
return this.Execute();
}
internal T Execute(){
if (this.func == null){
EnumerableRewriter rewriter = new EnumerableRewriter();
Expression body = rewriter.Visit(this.expression);
Expression> f = Expression.Lambda>(body, (IEnumerable)null);
this.func = f.Compile();
}
return this.func();
}
}
//
internal class EnumerableRewriter : OldExpressionVisitor {
internal EnumerableRewriter() {
}
internal override Expression VisitMethodCall(MethodCallExpression m) {
Expression obj = this.Visit(m.Object);
ReadOnlyCollection args = this.VisitExpressionList(m.Arguments);
// check for args changed
if (obj != m.Object || args != m.Arguments) {
Expression[] argArray = args.ToArray();
Type[] typeArgs = (m.Method.IsGenericMethod) ? m.Method.GetGenericArguments() : null;
if ((m.Method.IsStatic || m.Method.DeclaringType.IsAssignableFrom(obj.Type))
&& ArgsMatch(m.Method, args, typeArgs)) {
// current method is still valid
return Expression.Call(obj, m.Method, args);
}
else if (m.Method.DeclaringType == typeof(Queryable)) {
// convert Queryable method to Enumerable method
MethodInfo seqMethod = FindEnumerableMethod(m.Method.Name, args, typeArgs);
args = this.FixupQuotedArgs(seqMethod, args);
return Expression.Call(obj, seqMethod, args);
}
else {
// rebind to new method
BindingFlags flags = BindingFlags.Static | (m.Method.IsPublic ? BindingFlags.Public : BindingFlags.NonPublic);
MethodInfo method = FindMethod(m.Method.DeclaringType, m.Method.Name, args, typeArgs, flags);
args = this.FixupQuotedArgs(method, args);
return Expression.Call(obj, method, args);
}
}
return m;
}
private ReadOnlyCollection FixupQuotedArgs(MethodInfo mi, ReadOnlyCollection argList) {
ParameterInfo[] pis = mi.GetParameters();
if (pis.Length > 0) {
List newArgs = null;
for (int i = 0, n = pis.Length; i < n; i++) {
Expression arg = argList[i];
ParameterInfo pi = pis[i];
arg = FixupQuotedExpression(pi.ParameterType, arg);
if (newArgs == null && arg != argList[i]) {
newArgs = new List(argList.Count);
for (int j = 0; j < i; j++) {
newArgs.Add(argList[j]);
}
}
if (newArgs != null) {
newArgs.Add(arg);
}
}
if (newArgs != null)
argList = newArgs.ToReadOnlyCollection();
}
return argList;
}
private Expression FixupQuotedExpression(Type type, Expression expression) {
Expression expr = expression;
while (true) {
if (type.IsAssignableFrom(expr.Type))
return expr;
if (expr.NodeType != ExpressionType.Quote)
break;
expr = ((UnaryExpression)expr).Operand;
}
if (!type.IsAssignableFrom(expr.Type) && type.IsArray && expr.NodeType == ExpressionType.NewArrayInit) {
Type strippedType = StripExpression(expr.Type);
if (type.IsAssignableFrom(strippedType)) {
Type elementType = type.GetElementType();
NewArrayExpression na = (NewArrayExpression)expr;
List exprs = new List(na.Expressions.Count);
for (int i = 0, n = na.Expressions.Count; i < n; i++) {
exprs.Add(this.FixupQuotedExpression(elementType, na.Expressions[i]));
}
expression = Expression.NewArrayInit(elementType, exprs);
}
}
return expression;
}
internal override Expression VisitLambda(LambdaExpression lambda) {
return lambda;
}
private static Type GetPublicType(Type t)
{
// If we create a constant explicitly typed to be a private nested type,
// such as Lookup<,>.Grouping or a compiler-generated iterator class, then
// we cannot use the expression tree in a context which has only execution
// permissions. We should endeavour to translate constants into
// new constants which have public types.
if (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Lookup<,>.Grouping))
return typeof(IGrouping<,>).MakeGenericType(t.GetGenericArguments());
if (!t.IsNestedPrivate)
return t;
foreach (Type iType in t.GetInterfaces())
{
if (iType.IsGenericType && iType.GetGenericTypeDefinition() == typeof(IEnumerable<>))
return iType;
}
if (typeof(IEnumerable).IsAssignableFrom(t))
return typeof(IEnumerable);
return t;
}
internal override Expression VisitConstant(ConstantExpression c) {
EnumerableQuery sq = c.Value as EnumerableQuery;
if (sq != null) {
if (sq.Enumerable != null)
{
Type t = GetPublicType(sq.Enumerable.GetType());
return Expression.Constant(sq.Enumerable, t);
}
return this.Visit(sq.Expression);
}
return c;
}
internal override Expression VisitParameter(ParameterExpression p) {
return p;
}
private static ILookup _seqMethods;
static MethodInfo FindEnumerableMethod(string name, ReadOnlyCollection args, params Type[] typeArgs) {
if (_seqMethods == null) {
_seqMethods = typeof(Enumerable).GetMethods(BindingFlags.Static|BindingFlags.Public).ToLookup(m => m.Name);
}
MethodInfo mi = _seqMethods[name].FirstOrDefault(m => ArgsMatch(m, args, typeArgs));
if (mi == null)
throw Error.NoMethodOnTypeMatchingArguments(name, typeof(Enumerable));
if (typeArgs != null)
return mi.MakeGenericMethod(typeArgs);
return mi;
}
internal static MethodInfo FindMethod(Type type, string name, ReadOnlyCollection args, Type[] typeArgs, BindingFlags flags) {
MethodInfo[] methods = type.GetMethods(flags).Where(m => m.Name == name).ToArray();
if (methods.Length == 0)
throw Error.NoMethodOnType(name, type);
MethodInfo mi = methods.FirstOrDefault(m => ArgsMatch(m, args, typeArgs));
if (mi == null)
throw Error.NoMethodOnTypeMatchingArguments(name, type);
if (typeArgs != null)
return mi.MakeGenericMethod(typeArgs);
return mi;
}
private static bool ArgsMatch(MethodInfo m, ReadOnlyCollection args, Type[] typeArgs) {
ParameterInfo[] mParams = m.GetParameters();
if (mParams.Length != args.Count)
return false;
if (!m.IsGenericMethod && typeArgs != null && typeArgs.Length > 0) {
return false;
}
if (!m.IsGenericMethodDefinition && m.IsGenericMethod && m.ContainsGenericParameters) {
m = m.GetGenericMethodDefinition();
}
if (m.IsGenericMethodDefinition) {
if (typeArgs == null || typeArgs.Length == 0)
return false;
if (m.GetGenericArguments().Length != typeArgs.Length)
return false;
m = m.MakeGenericMethod(typeArgs);
mParams = m.GetParameters();
}
for (int i = 0, n = args.Count; i < n; i++) {
Type parameterType = mParams[i].ParameterType;
if (parameterType == null)
return false;
if (parameterType.IsByRef)
parameterType = parameterType.GetElementType();
Expression arg = args[i];
if (!parameterType.IsAssignableFrom(arg.Type)) {
if (arg.NodeType == ExpressionType.Quote) {
arg = ((UnaryExpression)arg).Operand;
}
if (!parameterType.IsAssignableFrom(arg.Type) &&
!parameterType.IsAssignableFrom(StripExpression(arg.Type))) {
return false;
}
}
}
return true;
}
private static Type StripExpression(Type type) {
bool isArray = type.IsArray;
Type tmp = isArray ? type.GetElementType() : type;
Type eType = TypeHelper.FindGenericType(typeof(Expression<>), tmp);
if (eType != null)
tmp = eType.GetGenericArguments()[0];
if (isArray) {
int rank = type.GetArrayRank();
return (rank == 1) ? tmp.MakeArrayType() : tmp.MakeArrayType(rank);
}
return type;
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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- TreeViewEvent.cs
- SafeArrayTypeMismatchException.cs
- SQLInt16.cs
- SQLSingle.cs
- QueuePathEditor.cs
- ToolStripProfessionalLowResolutionRenderer.cs
- StreamInfo.cs
- PeerCollaborationPermission.cs
- XmlAnyElementAttribute.cs
- messageonlyhwndwrapper.cs
- SystemIPv4InterfaceProperties.cs
- AtomParser.cs
- XmlTypeAttribute.cs
- StrokeNode.cs
- SmiContext.cs
- MenuCommands.cs
- UnknownWrapper.cs
- XamlDesignerSerializationManager.cs
- XsltOutput.cs
- SizeAnimation.cs
- DataColumnChangeEvent.cs
- XmlEncodedRawTextWriter.cs
- DSASignatureDeformatter.cs
- FacetValues.cs
- Context.cs
- RemotingException.cs
- WebBaseEventKeyComparer.cs
- ConfigXmlComment.cs
- DesignerDataColumn.cs
- ConfigurationCollectionAttribute.cs
- JsonFormatReaderGenerator.cs
- ResourceDescriptionAttribute.cs
- TimeoutValidationAttribute.cs
- TypeSystem.cs
- ZipIOZip64EndOfCentralDirectoryLocatorBlock.cs
- ZipIOZip64EndOfCentralDirectoryLocatorBlock.cs
- TransformConverter.cs
- EndpointAddressProcessor.cs
- ReferentialConstraint.cs
- FilterEventArgs.cs
- Assert.cs
- ColorContext.cs
- ConfigurationSectionGroup.cs
- XmlException.cs
- TimerEventSubscriptionCollection.cs
- AutoResizedEvent.cs
- AttachedAnnotationChangedEventArgs.cs
- XPathConvert.cs
- ListControlConvertEventArgs.cs
- QueryContinueDragEvent.cs
- XPathNavigatorKeyComparer.cs
- WebPartAuthorizationEventArgs.cs