/// <summary>
/// Compiles the filter.
/// </summary>
/// <remarks>
/// <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa746475(v=vs.85).aspx">Search
/// Filter Syntax</a>
/// </remarks>
/// <returns>
/// The filter.
/// </returns>
/// <param name='filter'>
/// Filter.
/// </param>
string CompileFilter(Filter filter)
{
if (filter == null)
{
return(string.Empty);
}
if (filter is AndFilter)
{
return("(&" + string.Join(string.Empty, ((AndFilter)filter).Filters.Select(CompileFilter)) + ")");
}
else if (filter is OrFilter)
{
return("(|" + string.Join(string.Empty, ((OrFilter)filter).Filters.Select(CompileFilter)) + ")");
}
else if (filter is NotFilter)
{
return("(!" + CompileFilter(((NotFilter)filter).InnerFilter) + ")");
}
else if (filter is EqualsFilter)
{
var f = (EqualsFilter)filter;
var attrs = GetAttributeTypes(f.PropertyName);
var q = attrs.Select(a => "(" + a + "=" + f.Value + ")");
if (attrs.Length == 1)
{
return(q.First());
}
else
{
return("(|" + string.Join("", q) + ")");
}
}
else if (filter is ContainsFilter)
{
var f = (ContainsFilter)filter;
var attrs = GetAttributeTypes(f.PropertyName);
var q = attrs.Select(a => "(" + a + "=*" + f.Value + "*)");
if (attrs.Length == 1)
{
return(q.First());
}
else
{
return("(|" + string.Join("", q) + ")");
}
}
else
{
throw new NotSupportedException(filter.GetType().Name);
}
}
IEnumerable <Person> Search(Filter filter)
{
if (filter is OrFilter)
{
var f = (OrFilter)filter;
var r = Enumerable.Empty <Person> ();
foreach (var sf in f.Filters)
{
r = r.Concat(Search(sf));
}
return(r.Distinct());
}
else if (filter is AndFilter)
{
throw new NotImplementedException();
}
else if (filter is NotFilter)
{
throw new NotImplementedException();
}
else if (filter is EqualsFilter)
{
var f = (EqualsFilter)filter;
var upper = f.Value.ToUpperInvariant();
var prop = properties [f.PropertyName];
var q = from p in people
let v = prop.GetValue(p, null)
where v != null && v.ToString().ToUpperInvariant() == upper
select p;
return(q);
}
else if (filter is ContainsFilter)
{
var f = (ContainsFilter)filter;
var re = new Regex(Regex.Escape(f.Value).Replace("\\ ", "|"), RegexOptions.IgnoreCase);
var prop = properties [f.PropertyName];
var q = from p in people
let v = prop.GetValue(p, null)
where v != null && re.IsMatch(v.ToString())
select p;
return(q);
}
else
{
throw new NotSupportedException("Unsupported filter type: " + filter.GetType());
}
}
IEnumerable<Person> Search(Filter filter)
{
if (filter is OrFilter) {
var f = (OrFilter)filter;
var r = Enumerable.Empty<Person> ();
foreach (var sf in f.Filters)
r = r.Concat (Search (sf));
return r.Distinct ();
} else if (filter is AndFilter) {
throw new NotImplementedException ();
} else if (filter is NotFilter) {
throw new NotImplementedException ();
} else if (filter is EqualsFilter) {
var f = (EqualsFilter)filter;
var upper = f.Value.ToUpperInvariant ();
var prop = properties [f.PropertyName];
var q = from p in people
let v = prop.GetValue (p, null)
where v != null && v.ToString ().ToUpperInvariant () == upper
select p;
return q;
} else if (filter is ContainsFilter) {
var f = (ContainsFilter)filter;
var re = new Regex (Regex.Escape (f.Value).Replace ("\\ ", "|"), RegexOptions.IgnoreCase);
var prop = properties [f.PropertyName];
var q = from p in people
let v = prop.GetValue (p, null)
where v != null && re.IsMatch (v.ToString ())
select p;
return q;
} else {
throw new NotSupportedException ("Unsupported filter type: " + filter.GetType ());
}
}
/// <summary>
/// Compiles the filter.
/// </summary>
/// <remarks>
/// <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/aa746475(v=vs.85).aspx">Search
/// Filter Syntax</a>
/// </remarks>
/// <returns>
/// The filter.
/// </returns>
/// <param name='filter'>
/// Filter.
/// </param>
string CompileFilter (Filter filter)
{
if (filter == null)
return string.Empty;
if (filter is AndFilter) {
return "(&" + string.Join (string.Empty, ((AndFilter)filter).Filters.Select (CompileFilter)) + ")";
} else if (filter is OrFilter) {
return "(|" + string.Join (string.Empty, ((OrFilter)filter).Filters.Select (CompileFilter)) + ")";
} else if (filter is NotFilter) {
return "(!" + CompileFilter (((NotFilter)filter).InnerFilter) + ")";
} else if (filter is EqualsFilter) {
var f = (EqualsFilter)filter;
var attrs = GetAttributeTypes (f.PropertyName);
var q = attrs.Select (a => "(" + a + "=" + f.Value + ")");
if (attrs.Length == 1)
return q.First ();
else
return "(|" + string.Join ("", q) + ")";
} else if (filter is ContainsFilter) {
var f = (ContainsFilter)filter;
var attrs = GetAttributeTypes (f.PropertyName);
var q = attrs.Select (a => "(" + a + "=*" + f.Value + "*)");
if (attrs.Length == 1)
return q.First ();
else
return "(|" + string.Join ("", q) + ")";
} else {
throw new NotSupportedException (filter.GetType ().Name);
}
}
