modules/platforms/dotnet/Apache.Ignite.EntityFramework/Impl/DbCacheKey.cs

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

namespace Apache.Ignite.EntityFramework.Impl
{
    using System.Collections.Generic;
    using System.Data.Entity.Core.Metadata.Edm;
    using System.Diagnostics;

    /// <summary>
    /// Represents a cache key, including dependent entity sets and their versions.
    /// </summary>
    internal class DbCacheKey
    {
        /** Original string key. */
        private readonly string _key;

        /** Ordered entity sets. */
        private readonly ICollection<EntitySetBase> _entitySets;

        /** Entity set versions. */
        private readonly IDictionary<string, long> _entitySetVersions;

        /// <summary>
        /// Initializes a new instance of the <see cref="DbCacheKey"/> class.
        /// </summary>
        public DbCacheKey(string key, ICollection<EntitySetBase> entitySets, 
            IDictionary<string, long> entitySetVersions)
        {
            Debug.Assert(key != null);

            _key = key;
            _entitySetVersions = entitySetVersions;
            _entitySets = entitySets;
        }

        /// <summary>
        /// Gets the key.
        /// </summary>
        public string Key
        {
            get { return _key; }
        }

        /// <summary>
        /// Gets the entity sets.
        /// </summary>
        public ICollection<EntitySetBase> EntitySets
        {
            get { return _entitySets; }
        }

        /// <summary>
        /// Gets the entity set versions.
        /// </summary>
        public IDictionary<string, long> EntitySetVersions
        {
            get { return _entitySetVersions; }
        }

        ///// <summary>
        ///// Gets the versioned key.
        ///// </summary>
        //public void GetStringKey()
        //{
        //    if (_entitySetVersions == null)
        //        return _key;

        //    var sb = new StringBuilder(_key);

        //    // Versions should be in the same order, so we can't iterate over the dictionary.
        //    foreach (var entitySet in _entitySets)
        //        sb.AppendFormat("_{0}", _entitySetVersions[entitySet.Name]);

        //    return sb.ToString();
        //}
    }
}