public override void ProcessMethodCall(IOqlSyntaxContext callContext, MethodCallExpression methodCall)
{
if (methodCall.IsCalled(Skip))
{
callContext.CallResult.Offset = (int)methodCall.GetArgument(1).GetValue();
return;
}
if (methodCall.IsCalled(Take))
{
callContext.CallResult.Size = (int)methodCall.GetArgument(1).GetValue();
return;
}
if (methodCall.IsCalled(ElementAt))
{
callContext.CallResult.Command = OqlCommandToken.ElementAt;
callContext.CallResult.ElementIndex = (int)methodCall.GetArgument(1).GetValue();
return;
}
if (methodCall.IsCalled(ElementAtOrDefault))
{
callContext.CallResult.ElementIndex = (int)methodCall.GetArgument(1).GetValue();
callContext.CallResult.Command = OqlCommandToken.ElementAt | OqlCommandToken.DefaultFlag;
return;
}
ProcessNavigate(callContext, methodCall);
}
public override void ProcessMethodCall(IOqlSyntaxContext callContext, MethodCallExpression methodCall)
{
if (methodCall.IsCalled(SkipWhile))
{
AndAlso(Expression.Not(methodCall.GetArgument(1)));
return;
}
AndAlso(methodCall.GetArgument(1));
OqlNavigationClause.ProcessNavigate(callContext, methodCall);
}
private static void VerifyGetArguments(MethodCallExpression call)
{
var args = call.Arguments;
Assert.Equal(args.Count, call.ArgumentCount);
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => call.GetArgument(-1));
AssertExtensions.Throws <ArgumentOutOfRangeException>("index", () => call.GetArgument(args.Count));
for (int i = 0; i != args.Count; ++i)
{
Assert.Same(args[i], call.GetArgument(i));
Assert.Equal(i, ((ConstantExpression)call.GetArgument(i)).Value);
}
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
if (node.GetArgument("ae") == parameter && (node.Method.Name == "Pattern" || node.Method.Name == "TryPattern"))
{
return(new AutomationPatternExpression(node.Method.GetGenericArguments()[0], node.Type));
}
return(base.VisitMethodCall(node));
}
public override void ProcessMethodCall(IOqlSyntaxContext callContext, MethodCallExpression methodCall)
{
if (Distinct.Equals(methodCall))
{
m_has_distinct = true;
return;
}
m_select_expression = methodCall.GetArgument(1);
callContext.CallResult.ResultType = methodCall.Type;
if (m_select_expression.NodeType == ExpressionType.MemberInit || m_select_expression.NodeType == ExpressionType.New)
{
return;
}
if (methodCall.IsCalled(Min))
{
visit_to_aggregate = (x, y) => callContext.AggregateFormatter.FormatMin(x, y);
return;
}
if (methodCall.IsCalled(Max))
{
visit_to_aggregate = (x, y) => callContext.AggregateFormatter.FormatMax(x, y);
return;
}
if (methodCall.IsCalled("Average"))
{
visit_to_aggregate = (x, y) => callContext.AggregateFormatter.FormatAverage(x, y);
return;
}
if (methodCall.IsCalled("Sum"))
{
visit_to_aggregate = (x, y) => callContext.AggregateFormatter.FormatSum(x, y);
return;
}
if (methodCall.IsCalledOr(Count, LongCount))
{
callContext.CallResult.Command = OqlCommandToken.Scalar;
}
visit_to_aggregate = null;
}
public static void CheckCallFactoryInstanceN()
{
const int N = 4;
ParameterExpression obj = Expression.Parameter(typeof(MS));
ConstantExpression[] args = Enumerable.Range(0, N).Select(i => Expression.Constant(i)).ToArray();
MethodCallExpression expr = Expression.Call(obj, typeof(MS).GetMethod("I" + N), args);
if (!PlatformDetection.IsNetNative) // .Net Native blocks internal framework reflection.
{
Assert.Equal("InstanceMethodCallExpressionN", expr.GetType().Name);
}
Assert.Same(obj, expr.Object);
Assert.Equal(N, expr.ArgumentCount);
for (var i = 0; i < N; i++)
{
Assert.Same(args[i], expr.GetArgument(i));
}
Collections.ObjectModel.ReadOnlyCollection <Expression> arguments = expr.Arguments;
Assert.Same(arguments, expr.Arguments);
Assert.Equal(N, arguments.Count);
for (var i = 0; i < N; i++)
{
Assert.Same(args[i], arguments[i]);
}
MethodCallExpression updated = expr.Update(obj, arguments.ToList());
Assert.Same(expr, updated);
var visited = (MethodCallExpression) new NopVisitor().Visit(expr);
Assert.Same(expr, visited);
var visitedObj = (MethodCallExpression) new VisitorObj().Visit(expr);
Assert.NotSame(expr, visitedObj);
Assert.NotSame(obj, visitedObj.Object);
Assert.Same(arguments, visitedObj.Arguments);
var visitedArgs = (MethodCallExpression) new VisitorArgs().Visit(expr);
Assert.NotSame(expr, visitedArgs);
Assert.Same(obj, visitedArgs.Object);
Assert.NotSame(arguments, visitedArgs.Arguments);
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
int start = 0;
Expression ob = node.Object;
if (node.Method.GetCustomAttribute(typeof(ExtensionAttribute)) != null)
{
start = 1;
ob = node.GetArgument(0);
}
if (ob != null)
{
Visit(ob);
Out('.');
}
_criteriaBuilder.Clear();
Out(node.Method.Name);
Out('(');
for (int i = start, n = node.ArgumentCount(); i < n; i++)
{
if (i > start)
{
Out(", ");
}
Visit(node.GetArgument(i));
}
Out(')');
if (string.Equals(node.Method.Name, "Where", StringComparison.InvariantCultureIgnoreCase))
{
_queryCriteriaStr.Add(_criteriaBuilder.ToString());
_queryCriteriaExp.Add(node.GetArgument(1));
}
_criteriaBuilder.Clear();
return(node);
}
protected virtual void VisitOrderBy(IOqlExpressionVisitor visitor, MethodCallExpression methodCall)
{
visitor.Visit(methodCall.GetArgument(1));
if (methodCall.IsCalledOr(OrderBy, ThenBy))
{
visitor.Query.AppendAsc();
return;
}
if (methodCall.IsCalledOr(OrderByDescending, ThenByDescending))
{
visitor.Query.AppendDesc();
}
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
try
{
string methodName = node.Method.Name.ToLower();
if (methodName.Equals("select"))
{
/*
* The following means this,
*
* 01. Get arguments of select.
* 02. Second argument is the expression that is invoked in select.
* 03. If it is a new expression, it means it is possibly multiple project expression.
* 04. But just in case look at the number of arguments to see if it is actually projecting
* more than one attributes.
*/
UnaryExpression unaryExpression = (UnaryExpression)node.Arguments[1];
LambdaExpression lambdaExpression = (LambdaExpression)unaryExpression.Operand;
if (lambdaExpression.Body is NewExpression newExpression)
{
multipleProjectionFlag = newExpression.ArgumentCount() > 1;
}
}
functions[methodName]++;
}
catch (Exception e)
{
Logger.Log(e, Microsoft.Extensions.Logging.LogLevel.Warning);
}
if (node.Object != null)
{
Visit(node.Object);
}
for (int i = 0, n = node.ArgumentCount(); i < n; i++)
{
Visit(node.GetArgument(i));
}
return(node);
}
public static bool ExtractDefaultIfEmpty(ref Expression expression)
{
MethodCallExpression mce = expression as MethodCallExpression;
if (mce == null || !mce.Method.IsGenericMethod)
{
return(false);
}
MethodInfo me = mce.Method.GetGenericMethodDefinition();
if (!ReflectionTools.MethodEqual(me, miDefaultIfEmptyE) && !ReflectionTools.MethodEqual(me, miDefaultIfEmptyQ))
{
return(false);
}
expression = mce.GetArgument("source");
return(true);
}
public override void ProcessMethodCall(IOqlSyntaxContext callContext, MethodCallExpression methodCall)
{
Expression x = methodCall.GetArgument(1);
if (x.NodeType == ExpressionType.MemberInit)
{
m_change_set = new MemberInitChangeSet(x as MemberInitExpression);
return;
}
object obj = x.GetValue();
if (obj is IDataChangeSet)
{
m_change_set = obj as IDataChangeSet;
return;
}
m_change_set = new ObjectChangeSet(obj).ChangeAllProperties();
}
/* ********************************************************************************************************
* -------------------------------- VISITORS -------------------------------- *
******************************************************************************************************** */
protected override Expression VisitMethodCall(MethodCallExpression node)
{
Logger.Log("VisitMethodCall : " + node.ToString(), Microsoft.Extensions.Logging.LogLevel.Trace);
object evalResult = EvaluateMethodAndCall(node);
if (evalResult != null)
{
PadPossibleStringValueToWhere(evalResult)
.Append(Space);
/*
* We don't need to visit further nodes.
* Doing so will pad the arguments of the
* method invoked which shouldn't be done.
*/
return(node);
}
if (node.Object != null)
{
Visit(node.Object);
}
for (int i = 0, n = node.ArgumentCount(); i < n; i++)
{
Visit(node.GetArgument(i));
}
// Add an 'AND' for separating query data criteria.
if (IsAndAble(node.Method.Name))
{
if (whereBuilder.Length > 0)
{
whereBuilder.Append("AND").Append(Space);
}
}
return(node);
}
public static void CheckCallFactoryStaticN()
{
const int N = 6;
ConstantExpression[] args = Enumerable.Range(0, N).Select(i => Expression.Constant(i)).ToArray();
MethodCallExpression expr = Expression.Call(typeof(MS).GetMethod("S" + N), args);
Assert.Equal("MethodCallExpressionN", expr.GetType().Name);
Assert.Equal(N, expr.ArgumentCount);
for (var i = 0; i < N; i++)
{
Assert.Same(args[i], expr.GetArgument(i));
}
Collections.ObjectModel.ReadOnlyCollection <Expression> arguments = expr.Arguments;
Assert.Same(arguments, expr.Arguments);
Assert.Equal(N, arguments.Count);
for (var i = 0; i < N; i++)
{
Assert.Same(args[i], arguments[i]);
}
MethodCallExpression updated = expr.Update(null, arguments);
Assert.Same(expr, updated);
var visited = (MethodCallExpression) new NopVisitor().Visit(expr);
Assert.Same(expr, visited);
var visitedArgs = (MethodCallExpression) new VisitorArgs().Visit(expr);
Assert.NotSame(expr, visitedArgs);
Assert.Same(null, visitedArgs.Object);
Assert.NotSame(arguments, visitedArgs.Arguments);
}
protected override Expression VisitMethodCall(MethodCallExpression node)
{
Logger.Log("Visiting node : " + node.ToString(), Microsoft.Extensions.Logging.LogLevel.Trace);
if (node.Object != null)
{
Visit(node.Object);
}
for (int i = 0, n = node.ArgumentCount(); i < n; i++)
{
Visit(node.GetArgument(i));
}
if (node.Method.Name.Equals("Select"))
{
foreach (var arg in node.Arguments)
{
selectArguments.Add(arg);
}
}
return(node);
}
/// <summary>
/// Gets the lambda expression given by the first argument.
/// </summary>
/// <param name="expression"></param>
/// <param name="index"></param>
/// <returns></returns>
public static LambdaExpression GetLambdaArgument(this MethodCallExpression expression, int index)
{
return(expression.GetArgument(index).UnpackLambda());
}
/// <summary>
/// Gets the lambda expression given by the first argument.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <typeparam name="TResult"></typeparam>
/// <param name="expression"></param>
/// <param name="index"></param>
/// <returns></returns>
public static Expression <Func <T, TResult> > GetLambdaArgument <T, TResult>(this MethodCallExpression expression, int index)
{
return(expression.GetArgument(index).UnpackLambda <T, TResult>());
}
protected override Expression VisitMethodCall(MethodCallExpression m)
{
if (m.Method.DeclaringType == typeof(Queryable) ||
m.Method.DeclaringType == typeof(Enumerable) ||
m.Method.DeclaringType == typeof(EnumerableUniqueExtensions))
{
switch (m.Method.Name)
{
case "Where":
return(this.BindWhere(m.Type, m.GetArgument("source"), m.GetArgument("predicate").StripQuotes()));
case "Select":
return(this.BindSelect(m.Type, m.GetArgument("source"), m.GetArgument("selector").StripQuotes()));
case "SelectMany":
if (m.Arguments.Count == 2)
{
return(this.BindSelectMany(m.Type, m.GetArgument("source"), m.GetArgument("selector").StripQuotes(), null));
}
else
{
return(this.BindSelectMany(m.Type, m.GetArgument("source"), m.GetArgument("collectionSelector").StripQuotes(), m.TryGetArgument("resultSelector").StripQuotes()));
}
case "Join":
return(this.BindJoin(
m.Type, m.GetArgument("outer"), m.GetArgument("inner"),
m.GetArgument("outerKeySelector").StripQuotes(),
m.GetArgument("innerKeySelector").StripQuotes(),
m.GetArgument("resultSelector").StripQuotes()));
case "OrderBy":
return(this.BindOrderBy(m.Type, m.GetArgument("source"), m.GetArgument("keySelector").StripQuotes(), OrderType.Ascending));
case "OrderByDescending":
return(this.BindOrderBy(m.Type, m.GetArgument("source"), m.GetArgument("keySelector").StripQuotes(), OrderType.Descending));
case "ThenBy":
return(this.BindThenBy(m.GetArgument("source"), m.GetArgument("keySelector").StripQuotes(), OrderType.Ascending));
case "ThenByDescending":
return(this.BindThenBy(m.GetArgument("source"), m.GetArgument("keySelector").StripQuotes(), OrderType.Descending));
case "GroupBy":
return(this.BindGroupBy(m.Type, m.GetArgument("source"),
m.GetArgument("keySelector").StripQuotes(),
m.GetArgument("elementSelector").StripQuotes()));
case "Count":
return(this.BindCount(m.Type, m.GetArgument("source")));
case "DefaultIfEmpty":
return(Visit(m.GetArgument("source")));
case "Any":
return(this.BindAny(m.Type, m.GetArgument("source")));
case "All":
return(this.BindAll(m.Type, m.GetArgument("source"), m.GetArgument("predicate").StripQuotes()));
case "Contains":
return(this.BindContains(m.Type, m.GetArgument("source"), m.TryGetArgument("item") ?? m.GetArgument("value")));
case "Sum":
case "Min":
case "Max":
case "Average":
return(this.BindAggregate(m.Type, m.Method.Name.ToEnum <AggregateSqlFunction>(),
m.GetArgument("source"), m.TryGetArgument("selector").StripQuotes()));
case "First":
case "FirstOrDefault":
case "Single":
case "SingleOrDefault":
return(BindUniqueRow(m.Type, m.Method.Name.ToEnum <UniqueFunction>(),
m.GetArgument("source"), m.TryGetArgument("predicate").StripQuotes()));
case "FirstEx":
case "SingleEx":
case "SingleOrDefaultEx":
return(BindUniqueRow(m.Type, m.Method.Name.RemoveEnd(2).ToEnum <UniqueFunction>(),
m.GetArgument("collection"), m.TryGetArgument("predicate").StripQuotes()));
case "Distinct":
return(BindDistinct(m.Type, m.GetArgument("source")));
case "Take":
return(BindTake(m.Type, m.GetArgument("source"), m.GetArgument("count")));
case "Skip":
return(BindSkip(m.Type, m.GetArgument("source"), m.GetArgument("count")));
}
}
if (m.Method.Name == "Mixin" && m.Method.GetParameters().Length == 0)
{
var obj = Visit(m.Object);
if (obj is MetaExpression me && me.Meta is CleanMeta)
{
CleanMeta cm = (CleanMeta)me.Meta;
var mixinType = m.Method.GetGenericArguments().Single();
return(new MetaExpression(mixinType, new CleanMeta(null, cm.PropertyRoutes.Select(a => a.Add(mixinType)).ToArray())));
}
}
if (m.Method.DeclaringType == typeof(LinqHints) || m.Method.DeclaringType == typeof(LinqHintEntities))
{
return(Visit(m.Arguments[0]));
}
if (m.Method.DeclaringType == typeof(StringExtensions) && m.Method.Name == nameof(StringExtensions.Etc))
{
return(Visit(m.Arguments[0]));
}
if (m.Method.DeclaringType == typeof(Lite) && m.Method.Name == "ToLite")
{
return(MakeCleanMeta(m.Type, Visit(m.Arguments[0])));
}
if (m.Method.DeclaringType == typeof(Math) &&
(m.Method.Name == "Abs" ||
m.Method.Name == "Ceiling" ||
m.Method.Name == "Floor" ||
m.Method.Name == "Round" ||
m.Method.Name == "Truncate"))
{
return(MakeCleanMeta(m.Type, Visit(m.Arguments[0])));
}
if (m.Method.Name == "ToString" && m.Object != null && typeof(IEntity).IsAssignableFrom(m.Object.Type))
{
return(Visit(Expression.Property(m.Object, piToStringProperty)));
}
if (m.Object != null)
{
var a = this.Visit(m.Object);
var list = this.Visit(m.Arguments);
return(MakeDirtyMeta(m.Type, null, list.PreAnd(a).ToArray()));
}
else
{
var list = this.Visit(m.Arguments);
return(MakeDirtyMeta(m.Type, null, list.ToArray()));
}
}
protected override Expression VisitMethodCall(MethodCallExpression m)
{
Type decType = m.Method.DeclaringType;
if (m.Method.IsGenericMethod && (decType == typeof(Queryable) || decType == typeof(Enumerable)))
{
bool query = decType == typeof(Queryable);
Type[] paramTypes = m.Method.GetGenericArguments();
MethodInfo mi = m.Method.GetGenericMethodDefinition();
//IE<IGrouping<K, S>> GroupBy<S, K>(this IE<S> source, Func<S, K> keySelector);
// GroupBy(col, a=>func(a)) -> GroupBy(col, a=>func(a), a=>a)
if (ReflectionTools.MethodEqual(mi, miGroupBySE) || ReflectionTools.MethodEqual(mi, miGroupBySQ))
{
var source = Visit(m.GetArgument("source"));
var keySelector = (LambdaExpression)Visit(m.GetArgument("keySelector").StripQuotes());
MethodInfo miG = (query ? miGroupByNQ : miGroupByNE)
.MakeGenericMethod(paramTypes[0], paramTypes[1], paramTypes[0]);
ParameterExpression p = Expression.Parameter(paramTypes[0], "p" + i++);
return(Expression.Call(miG, source, keySelector, Expression.Lambda(p, p)));
}
//IE<R> GroupBy<S, K, R>(this IE<S> source, Func<S, K> keySelector, Func<K, IE<S>, R> resultSelector);
// GroupBy(col, a=>f1(a), a=>f2(a), (a,B)=>f3(a,B)) -> GroupBy(col, a=>f1(a), a=>f2(a)).Select(g=>=>f3(g.Key,g))
if (ReflectionTools.MethodEqual(mi, miGroupBySRE) || ReflectionTools.MethodEqual(mi, miGroupBySRQ))
{
var source = Visit(m.GetArgument("source"));
var keySelector = (LambdaExpression)Visit(m.GetArgument("keySelector").StripQuotes());
var resultSelector = (LambdaExpression)Visit(m.GetArgument("resultSelector").StripQuotes());
Type groupingType = typeof(IGrouping <,>).MakeGenericType(paramTypes[1], paramTypes[0]);
MethodInfo miG = (query ? miGroupByNQ : miGroupByNE)
.MakeGenericMethod(paramTypes[0], paramTypes[1], paramTypes[0]);
MethodInfo miS = (query ? miSelectQ : miSelectE)
.MakeGenericMethod(groupingType, paramTypes[2]);
ParameterExpression g = Expression.Parameter(groupingType, "g" + i++);
LambdaExpression newResult =
Expression.Lambda(
Replacer.Replace(Replacer.Replace(resultSelector.Body,
resultSelector.Parameters[0], Expression.MakeMemberAccess(g, groupingType.GetProperty("Key"))),
resultSelector.Parameters[1], g),
g);
ParameterExpression p = Expression.Parameter(paramTypes[0], "p" + i++);
return
(Expression.Call(miS,
Expression.Call(miG, source, keySelector, Expression.Lambda(p, p)),
newResult));
}
//IE<R> GroupBy<S, K, E, R>(this IE<S> source, Func<S, K> keySelector, Func<S, E> elementSelector, Func<K, IE<E>, R> resultSelector)
// GroupBy(col, a=>f1(a), a=>f2(a), (k,B)=>f(k,B)) -> GroupBy(col, a=>f1(a), a=>f2(a)).Select(g=>f3(g.Key,g))
if (ReflectionTools.MethodEqual(mi, miGroupByNRE) || ReflectionTools.MethodEqual(mi, miGroupByNRQ))
{
var source = Visit(m.GetArgument("source"));
var keySelector = (LambdaExpression)Visit(m.GetArgument("keySelector").StripQuotes());
var elementSelector = (LambdaExpression)Visit(m.GetArgument("elementSelector").StripQuotes());
var resultSelector = (LambdaExpression)Visit(m.GetArgument("resultSelector").StripQuotes());
Type groupingType = typeof(IGrouping <,>).MakeGenericType(paramTypes[1], paramTypes[2]);
MethodInfo miG = (query ? miGroupByNQ : miGroupByNE)
.MakeGenericMethod(paramTypes[0], paramTypes[1], paramTypes[2]);
MethodInfo miS = (query ? miSelectQ : miSelectE)
.MakeGenericMethod(groupingType, paramTypes[3]);
ParameterExpression g = Expression.Parameter(groupingType, "g" + i++);
LambdaExpression newResult =
Expression.Lambda(
Replacer.Replace(Replacer.Replace(resultSelector.Body,
resultSelector.Parameters[0], Expression.MakeMemberAccess(g, groupingType.GetProperty("Key"))),
resultSelector.Parameters[1], g),
g);
return
(Expression.Call(miS,
Expression.Call(miG, source, keySelector, elementSelector),
newResult));
}
//IE<R> GroupJoin<O, I, K, R>(this IE<O> outer, IE<I> inner, Func<O, K> outerKeySelector, Func<I, K> innerKeySelector, Func<O, IE<I>, R> resultSelector)
// GroupJoin(outer, inner, o=>f1(o), i=>f2
//(i), (o, gI)=>f3(o,gI)) -->
// Join(outer, GroupBy(inner, i=>f2(i), i=>i) , o=>f1(o), g=>g.Key, (o,g)=>f2(o, g))
if (ReflectionTools.MethodEqual(mi, miGroupJoinE) || ReflectionTools.MethodEqual(mi, miGroupJoinQ))
{
Type tO = paramTypes[0], tI = paramTypes[1], tK = paramTypes[2], tR = paramTypes[3];
var outer = Visit(m.GetArgument("outer"));
var inner = Visit(m.GetArgument("inner"));
bool hasDefaultIfEmpty = ExtractDefaultIfEmpty(ref inner);
var outerKeySelector = (LambdaExpression)Visit(m.GetArgument("outerKeySelector").StripQuotes());
var innerKeySelector = (LambdaExpression)Visit(m.GetArgument("innerKeySelector").StripQuotes());
var resultSelector = (LambdaExpression)Visit(m.GetArgument("resultSelector").StripQuotes());
Type groupingType = typeof(IGrouping <,>).MakeGenericType(tK, tI);
MethodInfo miG = (query ? miGroupByNQ : miGroupByNQ)
.MakeGenericMethod(tI, tK, tI);
ParameterExpression p = Expression.Parameter(tI, "p" + i++);
Expression group = Expression.Call(miG, inner, innerKeySelector, Expression.Lambda(p, p));
if (hasDefaultIfEmpty)
{
var method = (query ? miDefaultIfEmptyQ : miDefaultIfEmptyE)
.MakeGenericMethod(groupingType);
group = Expression.Call(method, group);
}
//IQueryable<R> Join<TOuter, TInner, TKey, R>(this IQueryable<TOuter> outer, IEnumerable<TInner> inner, Expression<Func<TOuter, TKey>> outerKeySelector, Expression<Func<TInner, TKey>> innerKeySelector, Expression<Func<TOuter, TInner, R>> resultSelector);
MethodInfo mij = (query ? miJoinQ : miJoinE)
.MakeGenericMethod(tO, groupingType, tK, tR);
ParameterExpression g = Expression.Parameter(groupingType, "g" + i++);
LambdaExpression newResult =
Expression.Lambda(
Replacer.Replace(resultSelector.Body, resultSelector.Parameters[1], g),
resultSelector.Parameters[0], g);
return
(Expression.Call(mij, outer, group, outerKeySelector,
Expression.Lambda(Expression.MakeMemberAccess(g, groupingType.GetProperty("Key")), g),
newResult));
}
if (ReflectionTools.MethodEqual(mi, miCastE) || ReflectionTools.MethodEqual(mi, miCastQ))
{
var source = Visit(m.GetArgument("source"));
Type elemType = source.Type.ElementType();
ParameterExpression pe = Expression.Parameter(elemType);
var lambdaCast = Expression.Lambda(Expression.Convert(pe, paramTypes[0]), pe);
return(Expression.Call((query ? miSelectQ : miSelectE).MakeGenericMethod(elemType, paramTypes[0]), source, lambdaCast));
}
if (ReflectionTools.MethodEqual(mi, miOfTypeE) || ReflectionTools.MethodEqual(mi, miOfTypeQ))
{
var source = Visit(m.GetArgument("source"));
Type elemType = source.Type.ElementType();
ParameterExpression pe = Expression.Parameter(elemType);
var lambdaIs = Expression.Lambda(Expression.TypeIs(pe, paramTypes[0]), pe);
var lambdaCast = Expression.Lambda(Expression.Convert(pe, paramTypes[0]), pe);
var where = Expression.Call((query ? miWhereQ : miWhereE).MakeGenericMethod(elemType), source, lambdaIs);
return(Expression.Call((query ? miSelectQ : miSelectE).MakeGenericMethod(elemType, paramTypes[0]), where, lambdaCast));
}
if (mi.Name.Contains("Last"))
{
var source = Visit(m.GetArgument("source"));
var predicate = (LambdaExpression)Visit(m.TryGetArgument("predicate").StripQuotes());
Expression reverse = Expression.Call((query ? miReverseQ : miReverseE).MakeGenericMethod(paramTypes[0]), source);
if (predicate != null)
{
reverse = Expression.Call((query ? miWhereQ : miWhereE).MakeGenericMethod(paramTypes[0]), reverse, predicate);
}
MethodInfo mEqFirst = query ?
mi.Name.Contains("OrDefault") ? miFirstOrDefaultQ : miFirstQ :
mi.Name.Contains("OrDefault") ? miFirstOrDefaultE : miFirstE;
return(Expression.Call(mEqFirst.MakeGenericMethod(paramTypes[0]), reverse));
}
if (ReflectionTools.MethodEqual(mi, miElementAtE) || ReflectionTools.MethodEqual(mi, miElementAtOrDefaultE) ||
ReflectionTools.MethodEqual(mi, miElementAtQ) || ReflectionTools.MethodEqual(mi, miElementAtOrDefaultQ))
{
bool def = ReflectionTools.MethodEqual(mi, miElementAtOrDefaultE) || ReflectionTools.MethodEqual(mi, miElementAtOrDefaultQ);
var source = Visit(m.GetArgument("source"));
var index = Visit(m.GetArgument("index"));
MethodInfo first = (def ? (query ? miFirstOrDefaultQ : miFirstOrDefaultE) :
(query ? miFirstQ : miFirstE)).MakeGenericMethod(paramTypes[0]);
MethodInfo skip = (query ? miSkipQ : miSkipE).MakeGenericMethod(paramTypes[0]);
return(Visit(Expression.Call(first, Expression.Call(skip, source, index))));
}
if (ReflectionTools.MethodEqual(mi, miSkipE) || ReflectionTools.MethodEqual(mi, miSkipQ))
{
var source = Visit(m.GetArgument("source"));
var count = Visit(m.GetArgument("count"));
ParameterExpression pi = Expression.Parameter(typeof(int), "i");
ParameterExpression pa = Expression.Parameter(paramTypes[0], "a");
Expression lambda = Expression.Lambda(Expression.LessThanOrEqual(count, pi), pa, pi);
MethodInfo miWhereIndex = (query ? miWhereIndexQ : miWhereIndexE).MakeGenericMethod(paramTypes[0]);
return(Expression.Call(miWhereIndex, source, lambda));
}
if (ReflectionTools.MethodEqual(mi, miTakeE) || ReflectionTools.MethodEqual(mi, miTakeQ))
{
if (m.GetArgument("source") is MethodCallExpression m2)
{
var mi2 = (((MethodCallExpression)m2).Method).GetGenericMethodDefinition();
if (ReflectionTools.MethodEqual(mi2, miSkipE) || ReflectionTools.MethodEqual(mi2, miSkipQ))
{
var source = Visit(m2.GetArgument("source"));
var skip = Visit(m2.GetArgument("count"));
var take = Visit(m.GetArgument("count"));
ParameterExpression pi = Expression.Parameter(typeof(int), "i");
ParameterExpression pa = Expression.Parameter(paramTypes[0], "a");
Expression lambda = Expression.Lambda(
Expression.And(
Expression.LessThanOrEqual(skip, pi),
Expression.LessThan(pi, Expression.Add(skip, take))
), pa, pi);
MethodInfo miWhereIndex = (query ? miWhereIndexQ : miWhereIndexE).MakeGenericMethod(paramTypes[0]);
return(Expression.Call(miWhereIndex, source, lambda));
}
}
}
}
if (m.Method.DeclaringType == typeof(Tuple) && m.Method.Name == "Create")
{
var types = m.Arguments.Select(e => e.Type).ToArray();
if (types.Length < 8)
{
return(Expression.New(m.Method.ReturnType.GetConstructor(types), m.Arguments.ToArray()));
}
else
{
Type lastType = types[7];
types[7] = typeof(Tuple <>).MakeGenericType(lastType);
return(Expression.New(m.Method.ReturnType.GetConstructor(types), m.Arguments.Take(7).And(
Expression.New(types[7].GetConstructor(new[] { lastType }), m.Arguments[7])).ToArray()));
}
}
if (m.Method.DeclaringType == typeof(EnumerableExtensions) && m.Method.IsGenericMethod)
{
MethodInfo mi = m.Method.GetGenericMethodDefinition();
if (ReflectionTools.MethodEqual(mi, miToStringSeparator))
{
var type = m.Method.GetGenericArguments().SingleEx();
if (type != typeof(string))
{
var source = Visit(m.GetArgument("source"));
var p = Expression.Parameter(type);
var toString = Visit(Expression.Lambda(Expression.Call(p, miToString), p));
var separator = Visit(m.GetArgument("separator"));
return(Expression.Call(miToStringSeparator.MakeGenericMethod(typeof(string)),
Expression.Call(miSelectE.MakeGenericMethod(type, typeof(string)), source, toString),
separator));
}
}
else if (ReflectionTools.MethodEqual(mi, miToStringSeparatorE) || ReflectionTools.MethodEqual(mi, miToStringSeparatorQ))
{
var type = m.Method.GetGenericArguments().SingleEx();
bool isQuery = ReflectionTools.MethodEqual(mi, miToStringSeparatorQ);
var source = Visit(m.GetArgument("source"));
var toString = (LambdaExpression)Visit(m.GetArgument("toString").StripQuotes());
var separator = Visit(m.GetArgument("separator"));
return(Expression.Call(miToStringSeparator.MakeGenericMethod(typeof(string)),
Expression.Call((isQuery ? miSelectQ : miSelectE).MakeGenericMethod(type, typeof(string)), source, toString),
separator));
}
}
return(base.VisitMethodCall(m));
}
