GrantPrivilegesStatement.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.Collections.Generic;

using Deveel.Data.Security;
using Deveel.Data.Serialization;

namespace Deveel.Data.Sql.Statements {
    [Serializable]
    public sealed class GrantPrivilegesStatement : SqlStatement, IPreparableStatement {
        public GrantPrivilegesStatement(string grantee, Privileges privilege, ObjectName objName) 
            : this(grantee, privilege, false, objName) {
        }

        public GrantPrivilegesStatement(string grantee, Privileges privilege, bool withGrant, ObjectName objName) 
            : this(grantee, privilege, withGrant, objName, null) {
        }

        public GrantPrivilegesStatement(string grantee, Privileges privilege, ObjectName objName, IEnumerable<string> columns) 
            : this(grantee, privilege, false, objName, columns) {
        }

        public GrantPrivilegesStatement(string grantee, Privileges privilege, bool withGrant, ObjectName objName, IEnumerable<string> columns) {
            Grantee = grantee;
            Privilege = privilege;
            Columns = columns;
            ObjectName = objName;
            WithGrant = withGrant;
        }

        private GrantPrivilegesStatement(ObjectData data) {
            ObjectName = data.GetValue<ObjectName>("ObjectName");
            Grantee = data.GetString("Grantee");
            Privilege = (Privileges) data.GetInt32("Privilege");
            Columns = data.GetValue<string[]>("Columns");
            WithGrant = data.GetBoolean("WithGrant");
        }

        public IEnumerable<string> Columns { get; private set; }

        public string Grantee { get; private set; }

        public Privileges Privilege { get; private set; }

        public ObjectName ObjectName { get; private set; }

        public bool WithGrant { get; private set; }

        protected override void GetData(SerializeData data) {
            data.SetValue("ObjectName", ObjectName);
            data.SetValue("Grantee", Grantee);
            data.SetValue("Privilege", (int)Privilege);
            data.SetValue("Columns", Columns);
            data.SetValue("WithGrant", WithGrant);
        }

        IStatement IPreparableStatement.Prepare(IRequest context) {
            var objName = context.Query.ResolveObjectName(ObjectName.FullName);
            return new GrantPrivilegesStatement(Grantee, Privilege, WithGrant, objName, Columns);
        }

        protected override void ExecuteStatement(ExecutionContext context) {
            var obj = context.Request.Query.FindObject(ObjectName);
            if (obj == null)
                throw new InvalidOperationException(String.Format("Object '{0}' was not found in the system.", ObjectName));

            context.Request.Query.GrantTo(Grantee, obj.ObjectType, obj.FullName, Privilege, WithGrant);
        }
    }
}