private static Expression LteInvocation(ExpressionFilterQuerySyntaxVisitor visitor, InvocationQuerySyntaxNode node)
{
// lte(property, value) --> i.property <= value
var property = visitor.Visit(node.Arguments[0]);
var value = visitor.Visit(node.Arguments[1]);
return(QuerySyntaxHelper.Compare(property, value, Expression.LessThanOrEqual));
}
private static Expression GtInvocation(ExpressionFilterQuerySyntaxVisitor visitor, InvocationQuerySyntaxNode node)
{
// gt(property, value) --> i.property > value
var property = visitor.Visit(node.Arguments[0]);
var value = visitor.Visit(node.Arguments[1]);
return(QuerySyntaxHelper.Compare(property, value, Expression.GreaterThan));
}
private static Expression CreateSizeFilterForArrayProperty(ExpressionFilterQuerySyntaxVisitor visitor, InvocationQuerySyntaxNode node, Func <Expression, Expression, Expression> filter)
{
// filter(arrayProperty, value) --> filter(Enumerable.Count(i.arrayProperty), value)
var arrayProperty = visitor.Visit(node.Arguments[0]);
var value = visitor.Visit(node.Arguments[1]);
var itemType = QuerySyntaxHelper.GetCollectionItemType(arrayProperty.Type);
return(QuerySyntaxHelper.Compare(QuerySyntaxHelper.InvokeCount(itemType, arrayProperty), value, filter));
}
private static Expression CreateAnyFilterForArrayProperty(ExpressionFilterQuerySyntaxVisitor visitor, InvocationQuerySyntaxNode node, Func <Expression, Expression, Expression> filter)
{
// filter(arrayProperty, item) --> Enumerable.Any(i.arrayProperty, ii => filter(ii, item))
var arrayProperty = visitor.Visit(node.Arguments[0]);
var item = visitor.Visit(node.Arguments[1]);
var itemType = QuerySyntaxHelper.GetCollectionItemType(arrayProperty.Type);
var itemParameter = Expression.Parameter(itemType);
return(QuerySyntaxHelper.InvokeAny(itemType, arrayProperty, Expression.Lambda(QuerySyntaxHelper.Compare(itemParameter, item, filter), itemParameter)));
}