C# ISearchCriteria类代码示例

 /// <summary>
 ///     Initializes a new instance of the <see cref="SearchResults" /> class.
 /// </summary>
 /// <param name="searcher">The searcher.</param>
 /// <param name="reader">The reader.</param>
 /// <param name="docs">The hits.</param>
 /// <param name="criteria">The criteria.</param>
 /// <param name="query">The query.</param>
 public LuceneSearchResults(Searcher searcher, IndexReader reader, TopDocs docs, ISearchCriteria criteria, Query query)
 {
     Results = new SearchResults(criteria, null);
     CreateDocuments(searcher, docs);
     CreateFacets(reader, query);
     CreateSuggestions(reader, criteria);
 }

        /// <summary>
        ///     Builds the query.
        /// </summary>
        /// <param name="criteria">The criteria.</param>
        /// <returns></returns>
        public virtual object BuildQuery(ISearchCriteria criteria)
        {
            var query = new BooleanQuery();

            if (criteria.CurrentFilterValues != null)
            {
                for (var index = 0; index < criteria.CurrentFilterFields.Length; index++)
                {
                    var filter = criteria.CurrentFilters.ElementAt(index);
                    var value = criteria.CurrentFilterValues.ElementAt(index);
                    var field = criteria.CurrentFilterFields.ElementAt(index);

                    // Skip currencies that are not part of the filter
                    if (filter.GetType() == typeof(PriceRangeFilter)) // special filtering 
                    {
                        var currency = (filter as PriceRangeFilter).Currency;
                        if (!currency.Equals(criteria.Currency, StringComparison.OrdinalIgnoreCase))
                        {
                            continue;
                        }
                    }

                    var filterQuery = filter.GetType() == typeof(PriceRangeFilter)
                                          ? LuceneQueryHelper.CreateQuery(criteria, field, value as RangeFilterValue)
                                          : LuceneQueryHelper.CreateQuery(field, value);

                    if (filterQuery != null)
                    {
                        query.Add(filterQuery, Occur.MUST);
                    }
                }
            }

            return query;
        }

        public static BoolFilter<ESDocument> CreateQueryForValue(ISearchCriteria criteria, ISearchFilter filter, ISearchFilterValue value)
        {
            var query = new BoolFilter<ESDocument>();
            var field = filter.Key.ToLower();
            if (filter.GetType() == typeof(PriceRangeFilter))
            {
                var tempQuery = CreatePriceRangeFilter(criteria, field, value as RangeFilterValue);
                if (tempQuery != null)
                {
                    query.Must(q => q.Bool(b => tempQuery));
                }
            }
            else
            {
                if (value.GetType() == typeof(AttributeFilterValue))
                {
                    query.Must(q => q.Term(t=>t.Field(field).Value(((AttributeFilterValue)value).Value)));
                }
                else if (value.GetType() == typeof(RangeFilterValue))
                {
                    var tempValue = value as RangeFilterValue;
                    var tempFilter = new RangeFilter<ESDocument>();
                    tempFilter.Field(field).From(tempValue.Lower).To(tempValue.Upper).IncludeLower(true).IncludeUpper(false);
                    query.Should(q => q.Range(r => tempFilter));
                }
            }

            return query;
        }

        public ExcludedSearchCriteria(ISearchCriteria searchCriteria)
        {
            if (searchCriteria == null)
                throw new ArgumentNullException("searchCriteria");

            this.searchCriteria = searchCriteria;
        }

		public CatalogItemSearchResults(ISearchCriteria criteria, Dictionary<string, Dictionary<string, object>> items, SearchResults results)
		{
			_Items = items;
			_TotalCount = results.TotalCount;
			_Count = results.DocCount;
			_FacetGroups = results.FacetGroups;
			_SearchCriteria = criteria;
		}

 public Request(ISearchCriteria criteria, int depth, ReceiveResponse callback)
 {
     Identifier = Environment.MachineName + Peer.Self.Name + DateTime.UtcNow;
     SearchCriteria = criteria;
     Requester = Peer.Self;
     Depth = depth;
     Callback = callback;
 }

 /// <summary>
 /// Initializes a new instance of the <see cref="SearchCriteriaViewModel"/> class.
 /// </summary>
 /// <param name="criterea">The criterea.</param>
 public SearchCriteriaViewModel(ISearchCriteria criterea)
 {
     if (criterea != null)
     {
         this.SearchFor = criterea.SearchFor;
         this.CategoryID = criterea.CategoryID;
         this.OSID = criterea.OSID;
         this.OrderBy = criterea.OrderBy;
         this.Page = 1;
         //todo: add additional criterea here
     }
 }

        public static Filter CreateQuery(ISearchCriteria criteria, ISearchFilter filter, Occur clause)
        {
            var values = GetFilterValues(filter);
            if (values == null) return null;

            var query = new BooleanFilter();
            foreach (var value in values)
            {
                var valueQuery = CreateQueryForValue(criteria, filter, value);
                query.Add(new FilterClause(valueQuery, Occur.SHOULD));
            }

            return query;
        }

		public OrderSearchResults SearchOrders(string scope, ISearchCriteria criteria)
		{
			var results = _searchService.Search(scope, criteria) as SearchResults;

			if (results != null)
			{
				var resultIds = results.GetKeyFieldValues<string>();

				var orders = _orderRepository.Orders.Where(x => resultIds.Contains(x.OrderGroupId)).ToArray();

				var retVal = new OrderSearchResults(criteria, orders, results);
				return retVal;
			}
			return null;
		}

        public static BoolFilter<ESDocument> CreateQuery(ISearchCriteria criteria, ISearchFilter filter)
        {
            var values = GetFilterValues(filter);
            if (values == null) return null;

            var query = new BoolFilter<ESDocument>();
            foreach (var value in values)
            {
                var valueQuery = CreateQueryForValue(criteria, filter, value);
                //var boolQuery = new Query<ESDocument>();
                //boolQuery.Bool(x => valueQuery);
                query.Should(x=>x.Bool(y=>valueQuery));
            }

            return query;
        }

        public ISearchResults Search(string scope, ISearchCriteria criteria)
        {
            // Build query
            var builder = (SearchQuery)_queryBuilder.BuildQuery(criteria);

            SearchQueryResult resultDocs;

            // Add some error handling
            //try
            {
                var searchResponse = Client.Search(scope, builder).Result;
                if (!searchResponse.IsSuccess)
                {
                    throw new AzureSearchException(AzureSearchHelper.FormatSearchException(searchResponse));
                }

                resultDocs = searchResponse.Body;
            }
            /*
        catch (Exception ex)
        {
            throw ex;
        }
             * */

            // Parse documents returned
            var documents = new ResultDocumentSet { TotalCount = resultDocs.Count };
            var docList = new List<ResultDocument>();
            foreach (var indexDoc in resultDocs.Records)
            {
                var document = new ResultDocument();
                foreach (var field in indexDoc.Properties.Keys)
                {
                    document.Add(new DocumentField(field, indexDoc.Properties[field]));
                }

                docList.Add(document);
            }

            documents.Documents = docList.ToArray();

            // Create search results object
            var results = new SearchResults(criteria, new[] { documents });

            return results;
        }

        /// <summary>
        /// Creates the price range filter.
        /// </summary>
        /// <param name="criteria">The criteria.</param>
        /// <param name="field">The field.</param>
        /// <param name="value">The value.</param>
        /// <returns></returns>
        public static BoolFilter<ESDocument> CreatePriceRangeFilter(ISearchCriteria criteria, string field, RangeFilterValue value)
        {
            var query = new BoolFilter<ESDocument>();

            var lowerbound = value.Lower;
            var upperbound = value.Upper;

            var lowerboundincluded = true;
            var upperboundincluded = false;

            var currency = criteria.Currency.ToLower();

            // format is "fieldname_store_currency_pricelist"
            string[] pls = null;
            if (criteria is CatalogItemSearchCriteria)
            {
                pls = ((CatalogItemSearchCriteria)criteria).Pricelists;
            }

            var parentPriceList = String.Empty;

            // Create  filter of type 
            // price_USD_pricelist1:[100 TO 200} (-price_USD_pricelist1:[* TO *} +(price_USD_pricelist2:[100 TO 200} (-price_USD_pricelist2:[* TO *} (+price_USD_pricelist3[100 TO 200}))))

            if (pls == null || pls.Count() == 0)
                return null;

            var priceListId = pls[0].ToLower();

            var filter = new RangeFilter<ESDocument>();
            filter.Field(String.Format("{0}_{1}_{2}", field, currency, priceListId)).From(lowerbound).To(upperbound).IncludeLower(lowerboundincluded).IncludeUpper(upperboundincluded);

            //query.Should(q => q.ConstantScore(c => c.Filter(f => f.Range(r => filter))));
            query.Should(q => q.Range(r => filter));

            if (pls.Count() > 1)
            {
                var temp = CreatePriceRangeFilter(pls, 1, field, currency, lowerbound, upperbound, lowerboundincluded, upperboundincluded);
                query.Should(q => q.Bool(b => temp));
            }

            //Query query = new ConstantScoreQuery(filter);
            return query;
        }

 public static Filter CreateQueryForValue(ISearchCriteria criteria, ISearchFilter filter, ISearchFilterValue value)
 {
     Filter q = null;
     var priceQuery = filter is PriceRangeFilter;
     if (value is RangeFilterValue && priceQuery)
     {
         q = LuceneQueryHelper.CreateQuery(
             criteria, filter.Key, value as RangeFilterValue);
     }
     else if (value is CategoryFilterValue)
     {
         q = CreateQuery(filter.Key, value as CategoryFilterValue);
     }
     else
     {
         q = CreateQuery(filter.Key, value);
     }
     return q;
 }

        public static Filter CreateQueryForValue(ISearchCriteria criteria, ISearchFilter filter, ISearchFilterValue value)
        {
            Filter q;
            var priceQuery = filter is PriceRangeFilter;

            var rangeFilterValue = value as RangeFilterValue;
            if (rangeFilterValue != null && priceQuery)
            {
                q = CreateQuery(criteria, filter.Key, rangeFilterValue);
            }
            else if (value is CategoryFilterValue)
            {
                q = CreateQuery(filter.Key, (CategoryFilterValue)value);
            }
            else
            {
                q = CreateQuery(filter.Key, value);
            }

            return q;
        }

    public static ISearchCriteria BuildQuery(string[] textFields, string searchString, ISearchCriteria criteria)
    {
        List<SearchTerm> Terms = new List<SearchTerm>();

        if ((searchString.Contains(@"""")) && (searchString.Count(t => t == '"') % 2 == 0)) // even number of quotes, more than zero
        {
            Regex quoteRegex = new Regex(@""".+?"""); // look for any content between quotes
            foreach (Match item in quoteRegex.Matches(searchString))
            {
                Terms.Add(new SearchTerm() { Term = item.Value.Replace('"', ' ').Trim(), TermType = SearchTermType.MultiWord });
                searchString = Regex.Replace(searchString, item.Value, string.Empty); // remove them from search string for subsequent parsing
            }
        }

        List<string> singleTerms = new List<string>();
        singleTerms = searchString.Split(' ').ToList();
        singleTerms.ForEach(t => Terms.Add(new SearchTerm() { Term = t, TermType = SearchTermType.SingleWord }));

        foreach (SearchTerm t in Terms)
        {
            if (!string.IsNullOrEmpty(t.Term))
            {
                switch (t.TermType)
                {
                    case SearchTermType.SingleWord:
                        criteria.GroupedOr(textFields,
                            new IExamineValue[] { Examine.LuceneEngine.SearchCriteria.LuceneSearchExtensions.Fuzzy(t.Term, 0.4F) });
                        break;
                    case SearchTermType.MultiWord:
                        criteria.GroupedOr(textFields,
                            new IExamineValue[] { Examine.LuceneEngine.SearchCriteria.LuceneSearchExtensions.Escape(t.Term) });
                        break;
                    default:
                        break;
                }
            }
        }

        return criteria;
    }