AliasedSlot.cs source code in C# .NET

                        Code:
                         / Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / ndp / fx / src / DataEntity / System / Data / Map / ViewGeneration / CqlGeneration / AliasedSlot.cs / 2 / AliasedSlot.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

 
using System.Data.Mapping.ViewGeneration.Structures;
using System.Text;
using System.Diagnostics;
using System.Data.Common.Utils; 
using System.Collections.Generic;
 
namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 

    // A slot that encapsulates a slot in a particular CqlBlock 
    internal class AliasedSlot : ProjectedSlot {

        #region Constructor
        // effects: Creates an alias slot "block.slot" whose output member 
        // path is memberPath - this can be null for boolean slots. slotNum
        // is the slot number in block to which this slot refers to 
        internal AliasedSlot(CqlBlock block, ProjectedSlot slot, MemberPath memberPath, int slotNum) { 
            Debug.Assert(block != null && slot != null, "Null input to AliasedSlot constructor");
            Debug.Assert(slot is AliasedSlot || (slot is BooleanProjectedSlot ) == (memberPath == null), 
                         "If slot is boolean slot, there is no member path for it and vice-versa");
            m_block = block;
            // Note slot can be another aliased slot
            m_slot = slot; 
            m_memberPath = memberPath;
 
            // Make sure that the aliased slot is projected 
            Debug.Assert(block.IsProjected(slotNum), "Aliased slot " + this + " not being projected " +
                         "in child block "); 
        }
        #endregion

        #region Fields 
        private CqlBlock m_block;
        private ProjectedSlot m_slot; 
        private MemberPath m_memberPath; 
        #endregion
 
        #region Properties
        internal MemberPath MemberPath
        {
            get { return m_memberPath; } 
        }
 
        internal CqlBlock Block 
        {
            get { return m_block; } 
        }

        internal ProjectedSlot InnerSlot
        { 
            get { return m_slot; }
        } 
        #endregion 

        #region Methods 
        internal override ProjectedSlot MakeAliasedSlot(CqlBlock block, MemberPath outputPath, int slotNum) {
            // We take the slot inside this and change the block
            Debug.Assert(MemberPath.EqualityComparer.Equals(m_memberPath, outputPath),
                         "Different output paths for aliased slot and next use of it higher up in tree"); 
            AliasedSlot result = new AliasedSlot(block, m_slot, outputPath, slotNum);
            return result; 
        } 

        internal string FullCqlAlias() { 
            return CqlWriter.GetQualifiedName(m_block.CqlAlias, CqlFieldAlias(m_memberPath));
        }

        internal override string CqlFieldAlias(MemberPath outputMember) { 
            // effects: Returns The alias corresponding to this slot, e.g.,
            // _from0 or CPerson1_pid 
 
            Debug.Assert(MemberPath.EqualityComparer.Equals(outputMember, m_memberPath),
                         "Aliased slot's idea of what the output is different from the Cql block's idea"); 

            ProjectedSlot slot = m_slot;
            // Keep looking inside the aliased slot till we find a
            // non-aliased slot and then get the alias name for it 
            // For cycle detection
            Set slotSet = new Set(); 
            while (true) { 
                Debug.Assert(false == slotSet.Contains(slot), "Cycle detected in aliased slot");
                slotSet.Add(slot); 
                AliasedSlot aliasedSlot = slot as AliasedSlot;
                if (aliasedSlot == null) {
                    break;
                } 
                slot = aliasedSlot.m_slot;
            } 
            string result = slot.CqlFieldAlias(m_memberPath); 
            return result;
        } 

        internal override StringBuilder AsCql(StringBuilder builder, MemberPath outputMember,
 											  string blockAlias, int indentLevel) {
            // Ignore table alias and just get the full alias name 
            builder.Append(FullCqlAlias());
			return builder; 
        } 

        internal override void ToCompactString(StringBuilder builder) { 
            StringUtil.FormatStringBuilder(builder, "{0} ", m_block.CqlAlias);
            m_slot.ToCompactString(builder);
        }
        #endregion 

    } 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

 
using System.Data.Mapping.ViewGeneration.Structures;
using System.Text;
using System.Diagnostics;
using System.Data.Common.Utils; 
using System.Collections.Generic;
 
namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 

    // A slot that encapsulates a slot in a particular CqlBlock 
    internal class AliasedSlot : ProjectedSlot {

        #region Constructor
        // effects: Creates an alias slot "block.slot" whose output member 
        // path is memberPath - this can be null for boolean slots. slotNum
        // is the slot number in block to which this slot refers to 
        internal AliasedSlot(CqlBlock block, ProjectedSlot slot, MemberPath memberPath, int slotNum) { 
            Debug.Assert(block != null && slot != null, "Null input to AliasedSlot constructor");
            Debug.Assert(slot is AliasedSlot || (slot is BooleanProjectedSlot ) == (memberPath == null), 
                         "If slot is boolean slot, there is no member path for it and vice-versa");
            m_block = block;
            // Note slot can be another aliased slot
            m_slot = slot; 
            m_memberPath = memberPath;
 
            // Make sure that the aliased slot is projected 
            Debug.Assert(block.IsProjected(slotNum), "Aliased slot " + this + " not being projected " +
                         "in child block "); 
        }
        #endregion

        #region Fields 
        private CqlBlock m_block;
        private ProjectedSlot m_slot; 
        private MemberPath m_memberPath; 
        #endregion
 
        #region Properties
        internal MemberPath MemberPath
        {
            get { return m_memberPath; } 
        }
 
        internal CqlBlock Block 
        {
            get { return m_block; } 
        }

        internal ProjectedSlot InnerSlot
        { 
            get { return m_slot; }
        } 
        #endregion 

        #region Methods 
        internal override ProjectedSlot MakeAliasedSlot(CqlBlock block, MemberPath outputPath, int slotNum) {
            // We take the slot inside this and change the block
            Debug.Assert(MemberPath.EqualityComparer.Equals(m_memberPath, outputPath),
                         "Different output paths for aliased slot and next use of it higher up in tree"); 
            AliasedSlot result = new AliasedSlot(block, m_slot, outputPath, slotNum);
            return result; 
        } 

        internal string FullCqlAlias() { 
            return CqlWriter.GetQualifiedName(m_block.CqlAlias, CqlFieldAlias(m_memberPath));
        }

        internal override string CqlFieldAlias(MemberPath outputMember) { 
            // effects: Returns The alias corresponding to this slot, e.g.,
            // _from0 or CPerson1_pid 
 
            Debug.Assert(MemberPath.EqualityComparer.Equals(outputMember, m_memberPath),
                         "Aliased slot's idea of what the output is different from the Cql block's idea"); 

            ProjectedSlot slot = m_slot;
            // Keep looking inside the aliased slot till we find a
            // non-aliased slot and then get the alias name for it 
            // For cycle detection
            Set slotSet = new Set(); 
            while (true) { 
                Debug.Assert(false == slotSet.Contains(slot), "Cycle detected in aliased slot");
                slotSet.Add(slot); 
                AliasedSlot aliasedSlot = slot as AliasedSlot;
                if (aliasedSlot == null) {
                    break;
                } 
                slot = aliasedSlot.m_slot;
            } 
            string result = slot.CqlFieldAlias(m_memberPath); 
            return result;
        } 

        internal override StringBuilder AsCql(StringBuilder builder, MemberPath outputMember,
 											  string blockAlias, int indentLevel) {
            // Ignore table alias and just get the full alias name 
            builder.Append(FullCqlAlias());
			return builder; 
        } 

        internal override void ToCompactString(StringBuilder builder) { 
            StringUtil.FormatStringBuilder(builder, "{0} ", m_block.CqlAlias);
            m_slot.ToCompactString(builder);
        }
        #endregion 

    } 
 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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AliasedSlot.cs source code in C# .NET

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