ProcedureInfo.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 System.Linq;

using Deveel.Data;
using Deveel.Data.Sql;
using Deveel.Data.Sql.Expressions;

namespace Deveel.Data.Routines {
    public sealed class ProcedureInfo : RoutineInfo {
        public ProcedureInfo(ObjectName routineName) 
            : this(routineName, ProcedureType.Static) {
        }

        public ProcedureInfo(ObjectName routineName, ProcedureType procedureType) 
            : this(routineName, procedureType, new RoutineParameter[0]) {
        }

        public ProcedureInfo(ObjectName routineName, RoutineParameter[] parameters) 
            : this(routineName, ProcedureType.Static, parameters) {
        }

        public ProcedureInfo(ObjectName routineName, ProcedureType procedureType, RoutineParameter[] parameters) 
            : base(routineName, parameters) {
            ProcedureType = procedureType;
        }

        public override RoutineType RoutineType {
            get { return RoutineType.Procedure; }
        }

        public ProcedureType ProcedureType { get; private set; }

        internal override bool MatchesInvoke(Invoke invoke, IQuery query) {
            if (invoke == null)
                return false;

            bool ignoreCase = true;
            if (query != null)
                ignoreCase = query.IgnoreIdentifiersCase();

            if (!RoutineName.Equals(invoke.RoutineName, ignoreCase))
                return false;


            var inputParams = Parameters.Where(parameter => parameter.IsInput).ToList();
            if (invoke.Arguments.Length != inputParams.Count)
                return false;

            for (int i = 0; i < invoke.Arguments.Length; i++) {
                // TODO: support variable evaluation here? or evaluate parameters before reaching here?
                if (!invoke.Arguments[i].IsConstant())
                    return false;

                var argType = invoke.Arguments[i].ReturnType(query, null);
                var paramType = Parameters[i].Type;

                // TODO: verify if this is assignable (castable) ...
                if (!paramType.IsComparable(argType))
                    return false;
            }

            return true;
        }
    }
}