gkatoch opened a new issue, #858:
URL: https://github.com/apache/lucenenet/issues/858
Consider the following enum:
```
[Flags]
public enum Colors
{
None=0,
Red=0x1,
Blue=0x2,
Green=0x4,
Comination1 = 0x3f,
Yellow = 0x40,
Orange= 0x80,
Violet = 0x100,
Combination2 = 0xFC0,
All = 0xFFF
}
```
These are contained in a class like:
```
public class Test
{
public string Name {get;set;}
public Colors Color {get;set;}
}
```
The main class saving/retrieving these:
```
static class Program
{
private RAMDirectory _directory;
private const LuceneVersion Lv = LuceneVersion.LUCENE_48;
public static void main(string[] args)
{
var temp = new List<Test>();
temp.Add(new Test{ Name= "ABC", Color = Colors.Red};
temp.Add(new Test{ Name= "DEF", Color = Colors.Combination2 };
temp.Add(new Test{ Name= "ABC", Color = Colors.All};
temp.Add(new Test{ Name= "ABC", Color = Colors.Combination1 };
_directory = new RAMDirectory();
var analyzer= new StandardAnalyzer(Lv);
//WRITE DATA
var config = new IndexWriterConfig(Lv, analyzer);
var writer = new IndexWriter(_directory, config);
var nameField = new TextField("Name", "", Field.Store.YES);
var colorField = new TextField("Color", "", Field.Store.YES);
foreach(var val in temp)
{
var doc = new Document {nameField , colorField };
nameField.SetStringValue(val.Name);
colorField.SetStringValue(val.Color);
writer.AddDocument(doc);
}
writer.Commit();
//READ BACK
var search = Console.ReadLine();
var colorValue = Console.ReadLine();
var reader = DirectoryReader.Open(_directory);
var searcher = new IndexSearcher(reader);
var analyzer = new StandardAnalyzer(Lv);
var parser= new MultiFieldQueryParser(Lv, new string[]{"Name",
"Color"}, analyzer);
var query = parser.Parse(search.Trim());
var filter = new BooleanFilter();
filter.Add(new FilterClause(new TermFilter(new Term(
"Color",colorValue ))), Occur.SHOULD));
var result = searcher.Search(query, filter, 100).ScoreDocs;
}
}
```
The above code works fine when individual colors like Red, Green are
specified . However for enum values like `Combination1`, `Combination2 `and
`All `this does not get all matching Colors. This is since I add Flag values as
string and there isn't a string match available for the items: `Red is valid
for Combination1 enum value but not valid for a string comparison`
Is there a better way to do this where I can use `HasFlag` method in filter
to check matching bits?
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