/// <summary>
/// Retrieving suggestions using the AWS CloudSearch Suggester. The AWS CloudSearch Suggester
/// returns results from the entire index and does not suport query filtering.
/// </summary>
/// <param name="parameters">Suggest request parameters</param>
/// <returns>SuggestResults</returns>
public SuggestResults RetieveSuggestions(NameValueCollection parameters)
{
SuggestResults suggestResults = new SuggestResults();
try
{
AmazonCloudSearchDomainClient client = GetCloudSearchClient();
SuggestRequest request = new SuggestRequest();
if (parameters["suggestername"] != null)
{
request.Suggester = parameters["suggestername"];
}
if (parameters["q"] != null)
{
request.Query = parameters["q"];
}
request.Size = parameters["size"] != null?Convert.ToInt32(parameters["size"]) : this.DefaultPageSize;
SuggestResponse results = client.Suggest(request);
suggestResults.Matches = results.Suggest.Suggestions.Select(c => c.Suggestion).ToList();
}
catch (Exception ex)
{
suggestResults.HasError = true;
suggestResults.ErrorDetail = ex.Message + " : " + ex.StackTrace;
}
return(suggestResults);
}
public IResultSet Search(ISearchQuery query)
{
var amazonSearchParameters = this.GetAmazonParams();
AmazonCloudSearchDomainConfig config = new AmazonCloudSearchDomainConfig();
config.ServiceURL = amazonSearchParameters[SearchEndPoint];
AmazonCloudSearchDomainClient domainClient = new AmazonCloudSearchDomainClient(amazonSearchParameters[AccessKey], amazonSearchParameters[SecretAccessKey], config);
List <string> suggestions = new List <string>();
StringBuilder highlights = new StringBuilder();
highlights.Append("{\'");
if (query == null)
{
throw new ArgumentNullException("query");
}
foreach (var field in query.HighlightedFields)
{
if (highlights.Length > 2)
{
highlights.Append(", \'");
}
highlights.Append(field.ToLowerInvariant());
highlights.Append("\':{} ");
SuggestRequest suggestRequest = new SuggestRequest();
suggestRequest.Suggester = this.GetSuggesterName(field);
suggestRequest.Size = query.Take;
suggestRequest.Query = query.Text;
SuggestResponse suggestion = domainClient.Suggest(suggestRequest);
foreach (var suggest in suggestion.Suggest.Suggestions)
{
suggestions.Add(suggest.Suggestion);
}
}
highlights.Append("}");
SearchRequest searchRequest = new SearchRequest();
if (query.Filter != null)
{
searchRequest.FilterQuery = this.BuildQueryFilter(query.Filter);
}
if (query.OrderBy != null)
{
searchRequest.Sort = string.Join(",", query.OrderBy);
}
if (query.Take > 0)
{
searchRequest.Size = query.Take;
}
if (query.Skip > 0)
{
searchRequest.Start = query.Skip;
}
searchRequest.Highlight = highlights.ToString();
searchRequest.Query = query.Text;
searchRequest.QueryParser = QueryParser.Simple;
var result = domainClient.Search(searchRequest).SearchResult;
return(new AmazonResultSet(result, suggestions));
}
