ContextExtensions.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;

using Deveel.Data.Services;

namespace Deveel.Data.Types {
    public static class ContextExtensions {
        public static SqlType ResolveType(this IContext context, string typeName, params DataTypeMeta[] meta) {
            if (PrimitiveTypes.IsPrimitive(typeName))
                return PrimitiveTypes.Resolve(typeName, meta);

            var resolvers = context.ResolveAllServices<ITypeResolver>();
            foreach (var resolver in resolvers) {
                var sqlType = resolver.ResolveType(new TypeResolveContext(SqlTypeCode.Unknown, typeName, meta));
                if (sqlType != null)
                    return sqlType;
            }

            return null;
        }

        public static ITypeResolver TypeResolver(this IContext context) {
            return new ContextTypeResolver(context);
        }

        #region ContextTypeResolver

        class ContextTypeResolver : ITypeResolver {
            private readonly IContext queryContext;

            public ContextTypeResolver(IContext context) {
                queryContext = context;
            }

            public SqlType ResolveType(TypeResolveContext context) {
                return queryContext.ResolveType(context.TypeName, context.GetMeta());
            }
        }

        #endregion
    }
}