ViewCellRelation.cs source code in C# .NET

Source code for the .NET framework in C#

                        

Code:

/ Dotnetfx_Vista_SP2 / Dotnetfx_Vista_SP2 / 8.0.50727.4016 / DEVDIV / depot / DevDiv / releases / Orcas / QFE / ndp / fx / src / DataEntity / System / Data / Map / ViewGeneration / Validation / ViewCellRelation.cs / 2 / 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, List slots, 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(JoinTreeSlot 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.
//---------------------------------------------------------------------- 
// 
//      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, List slots, 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(JoinTreeSlot 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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