private static Query CreateMoreProjectsLikeThisQuery(int projectId)
{
int docNum = GetLuceneProjectDocumentNumber(projectId);
if (docNum == 0)
{
return(null);
}
var analyzer = new StandardAnalyzer(_version);
using (var searcher = new IndexSearcher(_directory, false))
{
IndexReader reader = searcher.IndexReader;
var moreLikeThis = new MoreLikeThis(reader)
{
Analyzer = analyzer
};
moreLikeThis.SetFieldNames(new[]
{
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId),
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title),
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Description),
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Price),
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductStatus),
StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Category)
});
moreLikeThis.MinDocFreq = 1;
moreLikeThis.MinTermFreq = 1;
moreLikeThis.Boost = true;
return(moreLikeThis.Like(docNum));
}
}
public static IList <ProductWidgetViewModel> GetMoreLikeThisProjectItems(int projectId)
{
Query query = CreateMoreProjectsLikeThisQuery(projectId);
if (query == null)
{
return(new List <ProductWidgetViewModel>());
}
using (var searcher = new IndexSearcher(_directory, false))
{
TopDocs hits = searcher.Search(query, 10);
var docs = hits.ScoreDocs.Select(item => searcher.Doc(item.Doc)).ToList();
return((from doc in docs
where !string.IsNullOrEmpty(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductStatus)))
select new ProductWidgetViewModel
{
Name = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title)),
Id = Convert.ToInt32(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId))),
Image = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Image)),
SlugUrl = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.SlugUrl)),
ProductStatus = (ProductStatus)Enum.Parse(typeof(ProductStatus), doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductStatus)), true),
Category = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Category)),
Price = decimal.Parse(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Price)))
}).ToList());
}
}
private static int GetLuceneProjectDocumentNumber(int projectId)
{
var analyzer = new StandardAnalyzer(_version);
var parser = new QueryParser(_version, StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId), analyzer);
Query query = parser.Parse(projectId.ToString(CultureInfo.InvariantCulture));
using (var searcher = new IndexSearcher(_directory, false))
{
TopDocs doc = searcher.Search(query, 1);
return(doc.TotalHits == 0 ? 0 : doc.ScoreDocs[0].Doc);
}
}
public static string[] SuggestSilmilarWords(string term, int count = 10)
{
IndexReader indexReader = IndexReader.Open(FSDirectory.Open(_luceneDir), true);
// Create the SpellChecker
var spellChecker = new SpellChecker.Net.Search.Spell.SpellChecker(FSDirectory.Open(_luceneDir + "\\Spell"));
// Create SpellChecker Index
spellChecker.ClearIndex();
spellChecker.IndexDictionary(new LuceneDictionary(indexReader, StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title)));
spellChecker.IndexDictionary(new LuceneDictionary(indexReader, StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Description)));
//Suggest Similar Words
return(spellChecker.SuggestSimilar(term, count, null, null, true));
}
private static LuceneSearchModel _mapLuceneDocumentToData(Document doc)
{
return(new LuceneSearchModel
{
PostId = Convert.ToInt32(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.PostId))),
ProductId = Convert.ToInt32(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId))),
Description = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Description)),
Title = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title)),
Image = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Image)),
Category = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Category)),
SlugUrl = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.SlugUrl)),
ProductStatus = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductStatus)),
Price = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Price))
});
}
public static void ClearLucenePostIndexRecord(int postId)
{
// init lucene
var analyzer = new StandardAnalyzer(_version);
using (var writer = new IndexWriter(_directory, analyzer, IndexWriter.MaxFieldLength.UNLIMITED))
{
var searchQuery = new TermQuery(new Term(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.PostId), postId.ToString(CultureInfo.InvariantCulture)));
// remove older index entry
writer.DeleteDocuments(searchQuery);
// close handles
analyzer.Close();
writer.Dispose();
}
}
public static IList <ProductWidgetViewModel> GetMoreLikeThisPostItems(int postId)
{
Query query = CreateMoreLikeThisQuery(postId);
if (query == null)
{
return(new List <ProductWidgetViewModel>());
}
using (var searcher = new IndexSearcher(_directory, false))
{
TopDocs hits = searcher.Search(query, 10);
return(hits.ScoreDocs.Select(item => searcher.Doc(item.Doc)).Select(doc => new ProductWidgetViewModel
{
Name = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title)),
Id = Convert.ToInt32(doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.PostId))),
Image = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Image)),
Category = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Category)),
SlugUrl = doc.Get(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.SlugUrl))
}).ToList());
}
}
private static void _addToLuceneIndex(LuceneSearchModel modelData, IndexWriter writer)
{
// remove older index entry
TermQuery searchQuery;
if (modelData.PostId.HasValue)
{
searchQuery = new TermQuery(new Term(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.PostId), modelData.PostId.Value.ToString(CultureInfo.InvariantCulture)));
}
else
{
searchQuery = new TermQuery(new Term(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId), modelData.ProductId.Value.ToString(CultureInfo.InvariantCulture)));
}
writer.DeleteDocuments(searchQuery);
// add new index entry
var document = new Document();
// add lucene fields mapped to db fields
if (modelData.PostId.HasValue)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.PostId),
modelData.PostId.Value.ToString(CultureInfo.InvariantCulture), Field.Store.YES, Field.Index.NOT_ANALYZED));
}
else
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductId),
modelData.ProductId.Value.ToString(CultureInfo.InvariantCulture), Field.Store.YES, Field.Index.NOT_ANALYZED));
}
if (modelData.Title != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Title), modelData.Title, Field.Store.YES, Field.Index.ANALYZED,
Field.TermVector.WITH_POSITIONS_OFFSETS)
{
Boost = 3
});
}
if (modelData.Description != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Description), modelData.Description, Field.Store.YES, Field.Index.ANALYZED,
Field.TermVector.WITH_POSITIONS_OFFSETS));
}
if (modelData.SlugUrl != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.SlugUrl), modelData.SlugUrl, Field.Store.YES, Field.Index.NOT_ANALYZED));
}
if (modelData.Image != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Image), modelData.Image, Field.Store.YES, Field.Index.NOT_ANALYZED));
}
if (modelData.Category != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Category), modelData.Category, Field.Store.YES, Field.Index.NOT_ANALYZED));
}
if (modelData.Price != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.Price), modelData.Price, Field.Store.YES, Field.Index.NOT_ANALYZED));
}
if (modelData.ProductStatus != null)
{
document.Add(new Field(StronglyTyped.PropertyName <LuceneSearchModel>(x => x.ProductStatus), modelData.ProductStatus, Field.Store.YES, Field.Index.NOT_ANALYZED));
}
// add entry to index
writer.AddDocument(document);
}
/// <summary>
/// Checks the equality of the inner values.
/// </summary>
protected bool Equals(StronglyTyped <TInnerType> other)
{
return(string.Equals(Value, other.Value));
}
public void WP8_StronglyTypedTest()
{
StronglyTyped.RunTest(new DebugWriter(), TestFolder.Path, OutputFolder.Path);
}
public void StronglyTypedTest()
{
StronglyTyped.RunTest(Console.Out, TestFolder, OutputFolder);
}
