//------------------------------------------------------------------------------
// <copyright file="FieldMetadata.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
// <owner current="true" primary="true">[....]</owner>
// <owner current="true" primary="false">[....]</owner>
//------------------------------------------------------------------------------

namespace System.Data.Common {

    using System.Data;
    using System.Data.Metadata.Edm;
    
    /// <summary>
    /// FieldMetadata class providing the correlation between the column ordinals and MemberMetadata.
    /// </summary>
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1815:OverrideEqualsAndOperatorEqualsOnValueTypes")]
    public struct FieldMetadata {

        private readonly EdmMember _fieldType;
        private readonly int _ordinal;

        /// <summary>
        /// Used to construct a field metadata object relating a column ordinal and an ImemberMetadata.
        /// </summary>
        /// <param name="ordinal">Column oridnal</param>
        /// <param name="fieldType">Metadata member</param>
        public FieldMetadata(int ordinal, EdmMember fieldType) {
            if (ordinal < 0) {
                throw EntityUtil.ArgumentOutOfRange("ordinal");
            }
            if (null == fieldType) {
                throw EntityUtil.ArgumentNull("fieldType");
            }

            _fieldType = fieldType;
            _ordinal = ordinal;
        }

        /// <summary>
        /// Metadata member.
        /// </summary>
        public EdmMember FieldType {
            get {
                return _fieldType;
            }
        }

        /// <summary>
        /// Column ordinal.
        /// </summary>
        public int Ordinal {
            get {
                return _ordinal;
            }
        }
    }
}