public Expression <Func <IEnumerable <TParam>, IEnumerable <TResult> > > Convert <TParam, TResult>(
Expression <Func <IQueryable <TParam>, IQueryable <TResult> > > expression)
{
var param = Expression.Parameter(typeof(IEnumerable <TParam>));
var visitor = new ReplacingVisitor(
node => node == expression.Parameters.Single() ? param : node,
new MethodReplasingRegistry());
var newBody = visitor.Visit(expression.Body);
return(Expression.Lambda <Func <IEnumerable <TParam>, IEnumerable <TResult> > >(newBody, param));
}
public Expression Convert(Func <Expression, Expression> dataSourceReplacer, Expression oldBody)
{
var visitor = new ReplacingVisitor(dataSourceReplacer, new MethodReplasingRegistry());
return(visitor.Visit(oldBody));
}
public Expression Convert(Expression oldDataSource, Expression newDataSource, Expression oldBody)
{
var visitor = new ReplacingVisitor(node => node == oldDataSource ? newDataSource : node, new MethodReplasingRegistry());
return(visitor.Visit(oldBody));
}
