private void VisitAndAlso(BinaryExpression andAlso)
{
if (subClauseDepth > 0)
{
luceneQuery.OpenSubclause();
}
subClauseDepth++;
VisitExpression(andAlso.Left);
luceneQuery.AndAlso();
VisitExpression(andAlso.Right);
subClauseDepth--;
if (subClauseDepth > 0)
{
luceneQuery.CloseSubclause();
}
}
public static IDocumentQuery <Resource> QueryByExample(IDocumentQuery <Resource> query, IEnumerable <Resource> examples)
{
foreach (var example in examples)
{
query.OrElse();
query.OpenSubclause();
var fields = new[] {
new { Name = "Context", Values = Enumerable.Repeat(example.Context, 1).Where(v => v != null) },
new { Name = "Type", Values = example.Type },
new { Name = "SubType", Values = example.SubType },
new { Name = "Code", Values = example.Code },
new { Name = "Status", Values = example.Status },
new { Name = "Tags", Values = example.Tags },
new { Name = "Properties", Values = (example.Properties ?? new Property[] { }).Select(p => p.Name) }
};
foreach (var field in fields)
{
foreach (var value in (field.Values ?? new string[] { }).Where(v => !String.IsNullOrWhiteSpace(v)))
{
if (value.StartsWith("!") && value.EndsWith("*"))
{
query.Not.WhereStartsWith(field.Name, value.TrimStart('!').TrimEnd('*'));
}
else if (value.StartsWith("!"))
{
query.WhereNotEquals(field.Name, value.TrimStart('!'));
}
else if (value.EndsWith("*"))
{
query.WhereStartsWith(field.Name, value.TrimEnd('*'));
}
else
{
query.WhereEquals(field.Name, value, exact: true);
}
}
}
foreach (var property in example.Properties ?? new Property[] { })
{
foreach (var value in (property.Value ?? new string[] { }).Where(v => !String.IsNullOrWhiteSpace(v)))
{
query.WhereEquals(property.Name, value, false);
}
foreach (var resource in property.Resources ?? new Resource[] { })
{
var resourcevalues = (new [] { resource.ResourceId ?? "" })
.Union(resource.Code ?? new string[] { })
.Union(resource.Title ?? new string[] { });
foreach (var value in resourcevalues.Where(v => !String.IsNullOrWhiteSpace(v)))
{
query.WhereEquals(property.Name, value);
}
}
}
foreach (var title in (example.Title ?? new string[] { }).Where(v => !String.IsNullOrWhiteSpace(v)))
{
query.Search("Title", title, SearchOperator.And);
}
foreach (var subTitle in (example.SubTitle ?? new string[] { }).Where(v => !String.IsNullOrWhiteSpace(v)))
{
query.Search("SubTitle", subTitle, SearchOperator.And);
}
foreach (var body in (example.Body ?? new string[] { }).Where(v => !String.IsNullOrWhiteSpace(v)))
{
query.Search("Body", body, SearchOperator.And);
}
query.CloseSubclause();
}
return(query);
}