QueryContextBase.cs

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// 
//  Copyright 2010-2015 Deveel
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
//

using System;
#if !PCL
using System.Security.Cryptography;
#endif

using Deveel.Data.Caching;
using Deveel.Data.Services;
using Deveel.Data.Transactions;

namespace Deveel.Data {
    public sealed class QueryContext : Context, IQueryContext {
        /*
#if PCL
        private Random secureRandom;
#else
        private RNGCryptoServiceProvider secureRandom;
#endif
        */

        internal QueryContext(ISessionContext parentContext)
            : base(parentContext) {

            this.RegisterInstance<IQueryContext>(this);
            /*
#if PCL
            secureRandom = new Random();
#else
            secureRandom = new RNGCryptoServiceProvider();
#endif
            */

            this.RegisterInstance<ICache>(new MemoryCache(), "TableCache");
        }

        public ISessionContext SessionContext {
            get { return (ISessionContext)ParentContext; }
        }

        protected override string ContextName {
            get { return ContextNames.Query; }
        }

        public IBlockContext CreateBlockContext() {
            return new BlockContext(this);
        }

        /*
        public virtual SqlNumber NextRandom(int bitSize) {
            AssertNotDisposed();

#if PCL
            var num = secureRandom.NextDouble();
#else
            var bytes = new byte[8];
            secureRandom.GetBytes(bytes);
            var num = BitConverter.ToInt64(bytes, 0);
#endif
            return new SqlNumber(num);
        }
        */

    }
}