CaseCqlBlock.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Map / ViewGeneration / CqlGeneration / CaseCqlBlock.cs / 1 / CaseCqlBlock.cs
                        

                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

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

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // A class to capture CqlBlocks responsible for case statements -- these
    // are statements needed for generating the variables in the 
    // multiconstants, i.e., complex types, entities, discriminators, etc
    internal class CaseCqlBlock : CqlBlock {

        #region Constructors 
        // effects: Creates a case statememt CqlBlock with SELECT (slots),
        // FROM (child -- note has only has one child), WHERE (true), AS 
        // (blockAliasNum). caseSlot indicates which slot in slots 
        // corresponds to the single case statement being generated by this block
        internal CaseCqlBlock(SlotInfo[] slots, int caseSlot, CqlBlock child, BoolExpression whereClause, CqlIdentifiers identifiers, int blockAliasNum) : 
            base(slots, new List(new CqlBlock[]{child}), whereClause, identifiers, blockAliasNum) {
            m_caseSlotInfo = slots[caseSlot];
        }
        #endregion 

        #region Fields 
        private SlotInfo m_caseSlotInfo; 
        #endregion
 
        #region Methods
        // effects: See CqlBlock.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, bool isTopLevel, int indentLevel) {
            // The SELECT part 
            StringUtil.IndentNewLine(builder, indentLevel);
            // Since we know that the case statement starts on a new line, we 
            // can add a comment after SELECT 
            Debug.Assert(m_caseSlotInfo.MemberPath != null, "We only construct real slots not boolean slots");
 
            builder.Append("SELECT ");
            if (isTopLevel) {
                builder.Append("VALUE ");
            } 
            builder.Append("-- Constructing ")
                   .Append(m_caseSlotInfo.MemberPath.LastComponentName); 
 
            Debug.Assert(Children.Count == 1, "Case can have exactly one child");
            CqlBlock childBlock = Children[0]; 

            // First emit the case statement "CASE ... END AS Alias"
            m_caseSlotInfo.AsCql(builder, childBlock.CqlAlias, indentLevel);
            if (false == isTopLevel) { 
                builder.Append(" AS ")
                       .Append(m_caseSlotInfo.CqlFieldAlias); 
            } 

            // Now get the remaining slots 
            bool isFirst = true;
            // CHANGE_[....]_IMPROVE: Try to leverage GenerateProjectedtList
            foreach (SlotInfo slot in Slots) {
                if (false == slot.IsRequiredByParent || object.ReferenceEquals(slot, m_caseSlotInfo)) { 
                    continue;
                } 
                if (isFirst == true) { 
                    // Add , after END and then start new line for first field
                    builder.Append(", "); 
                    StringUtil.IndentNewLine(builder, indentLevel + 1);
                } else {
                    // Simply add a comma for the next field
                    builder.Append(", "); 
                }
 
                slot.AsCql(builder, childBlock.CqlAlias, indentLevel); 
                isFirst = false;
            } 

            // The FROM part: FROM (ChildView) AS AliasName
 			StringUtil.IndentNewLine(builder, indentLevel);
            builder.Append("FROM ("); 
            // Get the child
 
            childBlock.AsCql(builder, false, indentLevel + 1); 
            StringUtil.IndentNewLine(builder, indentLevel);
            builder.Append(") AS ") 
                   .Append(childBlock.CqlAlias);

            // Get the WHERE part only when the expression is not simply TRUE
            if (false == BoolExpression.EqualityComparer.Equals(WhereClause, BoolExpression.True)) { 
                StringUtil.IndentNewLine(builder, indentLevel);
                builder.Append("WHERE "); 
                WhereClause.AsCql(builder, childBlock.CqlAlias); 
            }
 
            return 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.Collections.Generic;
using System.Data.Common.Utils;
using System.Diagnostics; 

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // A class to capture CqlBlocks responsible for case statements -- these
    // are statements needed for generating the variables in the 
    // multiconstants, i.e., complex types, entities, discriminators, etc
    internal class CaseCqlBlock : CqlBlock {

        #region Constructors 
        // effects: Creates a case statememt CqlBlock with SELECT (slots),
        // FROM (child -- note has only has one child), WHERE (true), AS 
        // (blockAliasNum). caseSlot indicates which slot in slots 
        // corresponds to the single case statement being generated by this block
        internal CaseCqlBlock(SlotInfo[] slots, int caseSlot, CqlBlock child, BoolExpression whereClause, CqlIdentifiers identifiers, int blockAliasNum) : 
            base(slots, new List(new CqlBlock[]{child}), whereClause, identifiers, blockAliasNum) {
            m_caseSlotInfo = slots[caseSlot];
        }
        #endregion 

        #region Fields 
        private SlotInfo m_caseSlotInfo; 
        #endregion
 
        #region Methods
        // effects: See CqlBlock.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, bool isTopLevel, int indentLevel) {
            // The SELECT part 
            StringUtil.IndentNewLine(builder, indentLevel);
            // Since we know that the case statement starts on a new line, we 
            // can add a comment after SELECT 
            Debug.Assert(m_caseSlotInfo.MemberPath != null, "We only construct real slots not boolean slots");
 
            builder.Append("SELECT ");
            if (isTopLevel) {
                builder.Append("VALUE ");
            } 
            builder.Append("-- Constructing ")
                   .Append(m_caseSlotInfo.MemberPath.LastComponentName); 
 
            Debug.Assert(Children.Count == 1, "Case can have exactly one child");
            CqlBlock childBlock = Children[0]; 

            // First emit the case statement "CASE ... END AS Alias"
            m_caseSlotInfo.AsCql(builder, childBlock.CqlAlias, indentLevel);
            if (false == isTopLevel) { 
                builder.Append(" AS ")
                       .Append(m_caseSlotInfo.CqlFieldAlias); 
            } 

            // Now get the remaining slots 
            bool isFirst = true;
            // CHANGE_[....]_IMPROVE: Try to leverage GenerateProjectedtList
            foreach (SlotInfo slot in Slots) {
                if (false == slot.IsRequiredByParent || object.ReferenceEquals(slot, m_caseSlotInfo)) { 
                    continue;
                } 
                if (isFirst == true) { 
                    // Add , after END and then start new line for first field
                    builder.Append(", "); 
                    StringUtil.IndentNewLine(builder, indentLevel + 1);
                } else {
                    // Simply add a comma for the next field
                    builder.Append(", "); 
                }
 
                slot.AsCql(builder, childBlock.CqlAlias, indentLevel); 
                isFirst = false;
            } 

            // The FROM part: FROM (ChildView) AS AliasName
 			StringUtil.IndentNewLine(builder, indentLevel);
            builder.Append("FROM ("); 
            // Get the child
 
            childBlock.AsCql(builder, false, indentLevel + 1); 
            StringUtil.IndentNewLine(builder, indentLevel);
            builder.Append(") AS ") 
                   .Append(childBlock.CqlAlias);

            // Get the WHERE part only when the expression is not simply TRUE
            if (false == BoolExpression.EqualityComparer.Equals(WhereClause, BoolExpression.True)) { 
                StringUtil.IndentNewLine(builder, indentLevel);
                builder.Append("WHERE "); 
                WhereClause.AsCql(builder, childBlock.CqlAlias); 
            }
 
            return builder;
        }
        #endregion
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.

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