Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Map / ViewGeneration / Validation / ViewCellRelation.cs / 1305376 / ViewCellRelation.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Mapping.ViewGeneration.Structures; using System.Text; using System.Data.Common.Utils; namespace System.Data.Mapping.ViewGeneration.Validation { ////// Represents a relation signature that lists all projected /// slots of two cell queries in a cell after projection. So if /// SPerson1.Disc is present in the cellquery (and part of the where /// clause) but not in the projected slots, it is missing from a ViewCellRelation /// internal class ViewCellRelation : CellRelation { #region Constructor // effects: Creates a view cell relation for "cell" with the // projected slots given by slots -- cellNumber is the number of the // cell for debugging purposes // Also creates the BasicCellRelations for the left and right cell queries internal ViewCellRelation(Cell cell, Listslots, int cellNumber) : base(cellNumber) { m_cell = cell; m_slots = slots; // We create the basiccellrelations passing this to it so that we have // a reference from the basiccellrelations to this m_cell.CQuery.CreateBasicCellRelation(this); m_cell.SQuery.CreateBasicCellRelation(this); } #endregion #region Fields private Cell m_cell; // The cell for which this relation exists private List m_slots; // Slots projected from both cell queries #endregion #region Properties internal Cell Cell { get { return m_cell; } } #endregion #region Methods // requires: slot corresponds to a slot in the corresponding // BasicCellRelation // effects: Given a slot in the corresponding basicCellRelation, // looks up the slot in this viewcellrelation and returns it. Returns // null if it does not find the slot in the left or right side of the viewrelation internal ViewCellSlot LookupViewSlot(MemberProjectedSlot slot) { // CHANGE_[....]_IMPROVE: We could have a dictionary to speed this up foreach (ViewCellSlot viewSlot in m_slots) { // If the left or right slots are equal, return the viewSlot if (ProjectedSlot.EqualityComparer.Equals(slot, viewSlot.CSlot) || ProjectedSlot.EqualityComparer.Equals(slot, viewSlot.SSlot)) { return viewSlot; } } return null; } protected override int GetHash() { // Note: Using CLR-Hashcode return m_cell.GetHashCode(); // We need not hash the slots, etc - cell should give us enough // differentiation and land the relation into the same bucket } internal override void ToCompactString(StringBuilder builder) { builder.Append("ViewRel["); m_cell.ToCompactString(builder); // StringUtil.ToSeparatedStringSorted(builder, m_slots, ", "); builder.Append(']'); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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