Context.cs

Go to the documentation of this file.

// 
//  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;

using Deveel.Data.Services;

namespace Deveel.Data {
    public abstract class Context : IContext {
        private IScope scope;

        protected Context() 
            : this(null) {
        }

        protected Context(IContext parent) {
            ParentContext = parent;
            InitScope();
        }

        ~Context() {
            Dispose(false);
        }

        protected abstract string ContextName { get; }

        protected virtual IScope ContextScope { 
            get { return scope; } 
        }

        protected IContext ParentContext { get; private set; }

        IContext IContext.Parent {
            get { return ParentContext; }
        }

        IScope IContext.Scope {
            get { return ContextScope; }
        }

        string IContext.Name {
            get { return ContextName; }
        }

        private void InitScope() {
            if (ParentContext != null)
                scope = ParentContext.Scope.OpenScope(ContextName);
        }

        protected virtual void Dispose(bool disposing) {
            if (disposing) {
                if (scope != null)
                    scope.Dispose();
            }

            scope = null;
            ParentContext = null;
        }

        public void Dispose() {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
    }
}