DeveelDbParameter.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.Data;
using System.Data.Common;

using Deveel.Data.Types;

namespace Deveel.Data.Client {
    public sealed class DeveelDbParameter : DbParameter, IDbDataParameter {
        private SqlTypeCode typeCode;
        private DbType dbType;

        public override void ResetDbType() {
            if (typeCode == SqlTypeCode.Bit ||
                typeCode == SqlTypeCode.Boolean) {
                dbType = DbType.Boolean;
            } else if (typeCode == SqlTypeCode.TinyInt) {
                dbType = DbType.Byte;
            } else if (typeCode == SqlTypeCode.SmallInt) {
                dbType = DbType.Int16;
            } else if (typeCode == SqlTypeCode.Integer) {
                dbType = DbType.Int32;
            } else if (typeCode == SqlTypeCode.BigInt) {
                dbType = DbType.Int64;
            } else if (typeCode == SqlTypeCode.Real ||
                       typeCode == SqlTypeCode.Float) {
                dbType = DbType.Single;
            } else if (typeCode == SqlTypeCode.Double) {
                dbType = DbType.Double;
            } else if (typeCode == SqlTypeCode.Decimal) {
                dbType = DbType.Decimal;
            } else if (typeCode == SqlTypeCode.Numeric) {
                dbType = DbType.VarNumeric;
            } else {
                throw new NotSupportedException(String.Format("The SQL Type '{0}' cannot be converted to DbType.", typeCode));
            }
        }

        private void ResetSqlType() {
            if (dbType == DbType.String ||
                dbType == DbType.AnsiString) {
                typeCode = SqlTypeCode.VarChar;
            } else if (dbType == DbType.StringFixedLength ||
                       dbType == DbType.AnsiStringFixedLength) {
                typeCode = SqlTypeCode.Char;
            } else if (dbType == DbType.Binary) {
                typeCode = SqlTypeCode.Binary;
            } else if (dbType == DbType.Boolean) {
                typeCode = SqlTypeCode.Boolean;
            } else if (dbType == DbType.Byte) {
                typeCode = SqlTypeCode.TinyInt;
            } else if (dbType == DbType.Int16) {
                typeCode = SqlTypeCode.SmallInt;
            } else if (dbType == DbType.Int32) {
                typeCode = SqlTypeCode.Integer;
            } else if (dbType == DbType.Int64) {
                typeCode = SqlTypeCode.BigInt;
            } else if (dbType == DbType.Single) {
                typeCode = SqlTypeCode.Float;
            } else if (dbType == DbType.Double) {
                typeCode = SqlTypeCode.Double;
            } else if (dbType == DbType.VarNumeric ||
                       dbType == DbType.Decimal ||
                       dbType == DbType.Currency) {
                typeCode = SqlTypeCode.Numeric;
            } else if (dbType == DbType.Date ||
                       dbType == DbType.DateTime2) {
                typeCode = SqlTypeCode.Date;
            } else if (dbType == DbType.DateTime ||
                       dbType == DbType.DateTimeOffset) {
                typeCode = SqlTypeCode.TimeStamp;
            } else if (dbType == DbType.Time) {
                typeCode = SqlTypeCode.Time;
            } else if (dbType == DbType.Object ||
                       dbType == DbType.Xml) {
                typeCode = SqlTypeCode.Type;
            } else {
                throw new NotSupportedException(String.Format("The DbType '{0}' is not supported by DeveelDB engine", dbType));
            }
        }

        public override DbType DbType {
            get { return dbType; }
            set {
                dbType = value;
                ResetSqlType();
            }
        }

        public SqlTypeCode SqlType {
            get { return typeCode; }
            set {
                typeCode = value;
                ResetDbType();
            }
        }

        public override System.Data.ParameterDirection Direction { get; set; }

        public override bool IsNullable { get; set; }

        public override string ParameterName { get; set; }

        public override string SourceColumn { get; set; }

        public override DataRowVersion SourceVersion { get; set; }

        public override object Value { get; set; }

        public override bool SourceColumnNullMapping { get; set; }

        public override int Size { get; set; }

        byte IDbDataParameter.Precision {
            get { return Precision; }
            set { Precision = value; }
        }

        byte IDbDataParameter.Scale {
            get { return Scale; }
            set { Scale = value; }
        }

        public byte Precision { get; set; }

        public byte Scale { get; set; }

        public string Locale { get; set; }
    }
}