private object ExecuteMapReduce(MongoQueryObject queryObject)
{
var options = new MapReduceOptionsBuilder();
options.SetQuery(new QueryDocument(queryObject.Query));
options.SetFinalize(new BsonJavaScript(queryObject.FinalizerFunction));
options.SetLimit(queryObject.NumberToLimit);
if (queryObject.Sort != null)
{
options.SetSortOrder(new SortByDocument(queryObject.Sort));
}
if (queryObject.NumberToSkip != 0)
{
throw new InvalidQueryException("MapReduce queries do not support Skips.");
}
var mapReduce = _collection.MapReduce(
new BsonJavaScript(queryObject.MapFunction),
new BsonJavaScript(queryObject.ReduceFunction),
options);
var executor = GetExecutor(typeof(BsonDocument), queryObject.Projector, queryObject.Aggregator, true);
return(executor.Compile().DynamicInvoke(queryObject.Collection.Database[mapReduce.CollectionName].FindAll()));
}
/// <summary>
/// mapReduce得到结果
/// </summary>
/// <param name="collectionName"></param>
/// <param name="query"></param>
/// <param name="finalizeJs"></param>
/// <param name="mapJs"></param>
/// <param name="reduceJs"></param>
/// <param name="limit"></param>
/// <param name="sortBy"></param>
/// <returns></returns>
public MapReduceResult MapReduceToResult(string collectionName, IMongoQuery query, string finalizeJs, string mapJs, string reduceJs, int limit, IMongoSortBy sortBy)
{
MongoCollection collection = GetMongoCollection(collectionName);
MapReduceOptionsBuilder builder = new MapReduceOptionsBuilder();
builder.SetFinalize(finalizeJs);
if (limit > 0)
{
builder.SetLimit(limit);
}
if (sortBy != null)
{
builder.SetSortOrder(sortBy);
}
MapReduceOutput output = new MapReduceOutput();
output.Mode = MapReduceOutputMode.Inline;
builder.SetOutput(output);
if (query == null || query == MongoDB.Driver.Builders.Query.Null)
{
return(collection.MapReduce(mapJs, reduceJs, builder));
}
else
{
return(collection.MapReduce(query, mapJs, reduceJs, builder));
}
}
