protected override SequenceConvertInfo Convert(
ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo, ParameterExpression param)
{
if (methodCall.Arguments.Count == 2)
{
var predicate = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var info = builder.ConvertSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]), predicate.Parameters[0]);
if (info != null)
{
info.Expression = methodCall.Transform(ex => ConvertMethod(methodCall, 0, info, predicate.Parameters[0], ex));
info.Parameter = param;
return(info);
}
}
else
{
var info = builder.ConvertSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]), null);
if (info != null)
{
info.Expression = methodCall.Transform(ex => ConvertMethod(methodCall, 0, info, null, ex));
info.Parameter = param;
return(info);
}
}
return(null);
}
protected override SequenceConvertInfo Convert(
ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo, ParameterExpression param)
{
var predicate = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var info = builder.ConvertSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]), predicate.Parameters[0]);
if (info != null)
{
info.Expression = methodCall.Transform(ex => ConvertMethod(methodCall, 0, info, predicate.Parameters[0], ex));
if (param != null)
{
if (param.Type != info.Parameter.Type)
{
param = Expression.Parameter(info.Parameter.Type, param.Name);
}
if (info.ExpressionsToReplace != null)
{
foreach (var path in info.ExpressionsToReplace)
{
path.Path = path.Path.Transform(e => e == info.Parameter ? param : e);
path.Expr = path.Expr.Transform(e => e == info.Parameter ? param : e);
}
}
}
info.Parameter = param;
return(info);
}
return(null);
}
protected override SequenceConvertInfo Convert(
ExpressionBuilder builder, MethodCallExpression methodCall, BuildInfo buildInfo, ParameterExpression param)
{
var info = builder.ConvertSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]), null);
if (info != null)
{
info.Expression =
Expression.Call(
methodCall.Method.DeclaringType,
methodCall.Method.Name,
new[] { info.Expression.Type.GetGenericArgumentsEx()[0] },
info.Expression, methodCall.Arguments[1]);
//methodCall.Transform(ex => ConvertMethod(methodCall, 0, info, null, ex));
info.Parameter = param;
return(info);
}
return(null);
}
protected override SequenceConvertInfo Convert(
ExpressionBuilder builder, MethodCallExpression originalMethodCall, BuildInfo buildInfo, ParameterExpression param)
{
var methodCall = originalMethodCall;
var selector = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var info = builder.ConvertSequence(new BuildInfo(buildInfo, methodCall.Arguments[0]), selector.Parameters[0]);
if (info != null)
{
methodCall = (MethodCallExpression)methodCall.Transform(
ex => ConvertMethod(methodCall, 0, info, selector.Parameters[0], ex));
selector = (LambdaExpression)methodCall.Arguments[1].Unwrap();
}
if (param != null && !ReferenceEquals(param, builder.SequenceParameter))
{
var list =
(
from path in GetExpressions(selector.Parameters[0], param, 0, selector.Body.Unwrap())
orderby path.Level descending
select path
).ToList();
if (list.Count > 0)
{
var plist = list.Where(e => ReferenceEquals(e.Expr, selector.Parameters[0])).ToList();
if (plist.Count > 1)
{
list = list.Except(plist.Skip(1)).ToList();
}
var p = plist.FirstOrDefault();
if (p == null)
{
var types = methodCall.Method.GetGenericArguments();
var mgen = methodCall.Method.GetGenericMethodDefinition();
var btype = typeof(ExpressionHoder <,>).MakeGenericType(types[0], selector.Body.Type);
var fields = btype.GetFieldsEx();
var pold = selector.Parameters[0];
var psel = Expression.Parameter(types[0], pold.Name);
methodCall = Expression.Call(
methodCall.Object,
mgen.MakeGenericMethod(types[0], btype),
methodCall.Arguments[0],
Expression.Lambda(
Expression.MemberInit(
Expression.New(btype),
Expression.Bind(fields[0], psel),
Expression.Bind(fields[1], selector.Body.Transform(e => e == pold ? psel : e))),
psel));
selector = (LambdaExpression)methodCall.Arguments[1].Unwrap();
param = Expression.Parameter(selector.Body.Type, param.Name);
list.Add(new SequenceConvertPath {
Path = param, Expr = Expression.MakeMemberAccess(param, fields[1]), Level = 1
});
var expr = Expression.MakeMemberAccess(param, fields[0]);
foreach (var t in list)
{
t.Expr = t.Expr.Transform(ex => ReferenceEquals(ex, pold) ? expr : ex);
}
return(new SequenceConvertInfo
{
Parameter = param,
Expression = methodCall,
ExpressionsToReplace = list
});
}
if (info != null)
{
if (info.ExpressionsToReplace != null)
{
foreach (var path in info.ExpressionsToReplace)
{
path.Path = path.Path.Transform(e => ReferenceEquals(e, info.Parameter) ? p.Path : e);
path.Expr = path.Expr.Transform(e => ReferenceEquals(e, info.Parameter) ? p.Path : e);
path.Level += p.Level;
list.Add(path);
}
list = list.OrderByDescending(path => path.Level).ToList();
}
}
if (list.Count > 1)
{
return(new SequenceConvertInfo
{
Parameter = param,
Expression = methodCall,
ExpressionsToReplace = list
.Where(e => !ReferenceEquals(e, p))
.Select(ei =>
{
ei.Expr = ei.Expr.Transform(e => ReferenceEquals(e, p.Expr) ? p.Path : e);
return ei;
})
.ToList()
});
}
}
}
if (!ReferenceEquals(methodCall, originalMethodCall))
{
return new SequenceConvertInfo
{
Parameter = param,
Expression = methodCall,
}
}
;
return(null);
}
