//---------------------------------------------------------------------
// <copyright file="MemberMaps.cs" company="Microsoft">
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// </copyright>
//
// @owner [....]
// @backupOwner [....]
//---------------------------------------------------------------------


using System.Diagnostics;

namespace System.Data.Mapping.ViewGeneration.Structures
{

    // This class manages the different maps used in the view generation
    // process. These maps keep track of indexes of memberpaths, domains of
    // member paths, etc
    internal class MemberMaps
    {

        #region Fields
        private MemberProjectionIndex m_projectedSlotMap;
        private MemberDomainMap m_queryDomainMap;
        private MemberDomainMap m_updateDomainMap;
        private ViewTarget m_viewTarget;
        #endregion

        #region Constructors
        internal MemberMaps(ViewTarget viewTarget, MemberProjectionIndex projectedSlotMap,
                            MemberDomainMap queryDomainMap, MemberDomainMap updateDomainMap)
        {

            m_projectedSlotMap = projectedSlotMap;
            m_queryDomainMap = queryDomainMap;
            m_updateDomainMap = updateDomainMap;

            Debug.Assert(m_queryDomainMap != null);
            Debug.Assert(m_updateDomainMap != null);
            Debug.Assert(m_projectedSlotMap != null);
            m_viewTarget = viewTarget;
        }
        #endregion


        #region Properties

        internal MemberProjectionIndex ProjectedSlotMap
        {
            get { return m_projectedSlotMap; }
        }

        internal MemberDomainMap QueryDomainMap
        {
            get { return m_queryDomainMap; }
        }

        internal MemberDomainMap UpdateDomainMap
        {
            get { return m_updateDomainMap; }
        }

        internal MemberDomainMap RightDomainMap
        {
            get
            {
                return m_viewTarget == ViewTarget.QueryView ? m_updateDomainMap : m_queryDomainMap;
            }
        }

        internal MemberDomainMap LeftDomainMap
        {
            get
            {
                return m_viewTarget == ViewTarget.QueryView ? m_queryDomainMap : m_updateDomainMap;
            }
        }
        #endregion
    }
}