public class LuceneQuery : ILuceneQuery
{
#region Identity
private Logger logger = new Logger(typeof(LuceneQuery));
#endregion Identity
#region QueryIndex
/// <summary>
/// 获取商品信息数据
/// </summary>
/// <param name="queryString"></param>
/// <returns></returns>
public List<Commodity> QueryIndex(string queryString)
{
IndexSearcher searcher = null;
try
{
List<Commodity> ciList = new List<Commodity>();
Directory dir = FSDirectory.Open(StaticConstant.IndexPath);
searcher = new IndexSearcher(dir);
Analyzer analyzer = new PanGuAnalyzer();
//--------------------------------------这里配置搜索条件
QueryParser parser = new QueryParser(Version.LUCENE_30, "title", analyzer);
Query query = parser.Parse(queryString);
Console.WriteLine(query.ToString()); //显示搜索表达式
TopDocs docs = searcher.Search(query, (Filter)null, 10000);
foreach (ScoreDoc sd in docs.ScoreDocs)
{
Document doc = searcher.Doc(sd.Doc);
ciList.Add(DocumentToCommodityInfo(doc));
}
return ciList;
}
finally
{
if (searcher != null)
{
searcher.Dispose();
}
}
}
/// <summary>
/// 分页获取商品信息数据
/// </summary>
/// <param name="queryString"></param>
/// <param name="pageIndex">第一页为1</param>
/// <param name="pageSize"></param>
/// <param name="totalCount"></param>
/// <returns></returns>
public List<Commodity> QueryIndexPage(string queryString, int pageIndex, int pageSize, out int totalCount, string priceFilter, string priceOrderBy)
{
totalCount = 0;
IndexSearcher searcher = null;
try
{
List<Commodity> ciList = new List<Commodity>();
FSDirectory dir = FSDirectory.Open(StaticConstant.IndexPath);
searcher = new IndexSearcher(dir);
Analyzer analyzer = new PanGuAnalyzer();
//--------------------------------------这里配置搜索条件
QueryParser parser = new QueryParser(Version.LUCENE_30, "title", analyzer);
Query query = parser.Parse(queryString);
pageIndex = Math.Max(1, pageIndex);//索引从1开始
int startIndex = (pageIndex - 1) * pageSize;
int endIndex = pageIndex * pageSize;
NumericRangeFilter<float> numPriceFilter = null;
if (!string.IsNullOrWhiteSpace(priceFilter))
{
bool isContainStart = priceFilter.StartsWith("[");
bool isContainEnd = priceFilter.EndsWith("]");
string[] floatArray = priceFilter.Replace("[", "").Replace("]", "").Replace("{", "").Replace("}", "").Split(',');
float start = 0;
float end = 0;
if (!float.TryParse(floatArray[0], out start) || !float.TryParse(floatArray[1], out end))
{
throw new Exception("Wrong priceFilter");
}
numPriceFilter = NumericRangeFilter.NewFloatRange("price", start, end, isContainStart, isContainEnd);
}
Sort sort = new Sort();
if (!string.IsNullOrWhiteSpace(priceOrderBy))
{
SortField sortField = new SortField("price", SortField.FLOAT, priceOrderBy.EndsWith("asc", StringComparison.CurrentCultureIgnoreCase));
sort.SetSort(sortField);
}
TopDocs docs = searcher.Search(query, numPriceFilter, 10000, sort);
//TopDocs docs = searcher.Search(query, null, 10000);
totalCount = docs.TotalHits;
//PrintScores(docs, startIndex, endIndex, searcher);
for (int i = startIndex; i < endIndex && i < totalCount; i++)
{
Document doc = searcher.Doc(docs.ScoreDocs[i].Doc);
ciList.Add(DocumentToCommodityInfo(doc));
}
return ciList;
}
finally
{
if (searcher != null)
{
searcher.Dispose();
}
}
}
private void PrintScores(TopDocs docs, int startIndex, int endIndex, MultiSearcher searcher)
{
ScoreDoc[] scoreDocs = docs.ScoreDocs;
for (int i = startIndex; i < endIndex && i < scoreDocs.Count(); i++)
{
int docId = scoreDocs[i].Doc;
Document doc = searcher.Doc(docId);
logger.Info(string.Format("{0}的分值为{1}", doc.Get("productid"), scoreDocs[i].Score));
}
}
#endregion QueryIndex
#region private
private Commodity DocumentToCommodityInfo(Document doc)
{
return new Commodity()
{
Id = int.Parse(doc.Get("id")),
Title = doc.Get("title"),
ProductId = long.Parse(doc.Get("productid")),
CategoryId = int.Parse(doc.Get("categoryid")),
ImageUrl = doc.Get("iamgeurl"),
Price = decimal.Parse(doc.Get("price")),
Url = doc.Get("url")
};
}
#endregion private
}