/Source/facebook.Linq/Linq/Provider.cs

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Linq.Expressions;

using System.Data.Linq;

using System.Collections;

using facebook.Linq;

using facebook;



namespace facebook.Linq

{

	class FqlProvider : IFqlProvider

	{

		public FqlProvider(API api)

		{

			Api = api;

		}

		API Api;



		#region IMyProvider Members



		public System.Data.Linq.IExecuteResult Execute(System.Linq.Expressions.Expression query, Type tableRowType)

		{

			var builder = new FqlQueryBuilder(query);

			var fql = builder.BuildQuery();

			var resultType = query.Type;//

			if (resultType.IsGenericType)

					resultType = resultType.GetGenericArguments()[0];

			if (fql.StartsWith("from "))

				fql = "select * " + fql;

			

			

			//QueryBuilder2

			//var builder = new FqlQueryBuilder(query);

			//var fql = builder.BuildQuery();

			//var select = builder.Select;

			//var resultType = query.Type.GetGenericArguments()[0];

			fql = FqlDataContext.FixQuery(fql);

			var response = ExecuteFqlQuery(fql);

			return new FqlExecuteResult(response, resultType, tableRowType, builder.QueryOptions);

		}



		public string GetQueryText(System.Linq.Expressions.Expression query)

		{

			var builder = new FqlQueryBuilder(query);

			var fql = builder.BuildQuery();

			return fql;

		}



		public SqlNode GetSqlTree(Expression query)

		{

			//var builder = new FqlQueryBuilder2(query);

			//return builder.GetSqlExpressionTree();

			throw new Exception();

		}

		#endregion



		#region IFqlProvider Members



		public System.IO.TextWriter Log{get;set;}



		public string ExecuteFqlQuery(string query)

		{

			if (Log != null)

				Log.WriteLine("Executing Fql: " + query);

			return Api.fql.query(query);

		}



		#endregion

	}

}