public override object VisitFilter(QueryFilteringParser.FilterContext context)
{
var visitor = new FilterExpressionVisitor(_parameter);
var tree = context.expression.Accept(visitor);
var lambda = ReflectionCache.Lambda
.MakeGenericMethod(typeof(Func <,>)
.MakeGenericType(_parameter.Type, typeof(bool)));
var expression = lambda.Invoke(null, new object[] { tree.CreateExpression(), new ParameterExpression[] { _parameter } });
var where = ReflectionCache.Where
.MakeGenericMethod(_parameter.Type);
return(where.Invoke(null, new[] { _sourceQueryable, expression }));
}
/// <summary>
/// Visit a parse tree produced by <see cref="QueryFilteringParser.filter"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitFilter([NotNull] QueryFilteringParser.FilterContext context)
{
return(VisitChildren(context));
}
public override object VisitFilter(QueryFilteringParser.FilterContext context)
{
var visitor = new FilterVisitor(_sourceQueryable, _parameter);
return(context.Accept(visitor));
}