JoinCqlBlock.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 / JoinCqlBlock.cs / 1 / JoinCqlBlock.cs
                        
                        
                            //---------------------------------------------------------------------- 
// 
//      Copyright (c) Microsoft Corporation.  All rights reserved.
// 
// 
// @owner [....]
// @backupOwner [....] 
//--------------------------------------------------------------------- 

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

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // This class corresponds to the various Join nodes in the view, i.e.,
    // IJ, LOJ, FOJ 
    internal class JoinCqlBlock : CqlBlock {
        #region Constructor
        // effects: Creates a Join CqlBlock (type given by opType) with
        // SELECT (slotinfos), FROM (children), ON (onClauses - one for each child except 0th), 
        // WHERE (true), AS (blockAliasNum)
        internal JoinCqlBlock(CellTreeOpType opType, SlotInfo[] slotInfos, List children, 
                              List onClauses, CqlIdentifiers identifiers, int blockAliasNum) : 
            base(slotInfos, children, BoolExpression.True, identifiers, blockAliasNum) {
            m_opType = opType; 
            m_onClauses = onClauses;
        }
        #endregion
 
        #region Fields
        private CellTreeOpType m_opType; // LOJ or IJ etc 
        private List m_onClauses; 
        #endregion
 
        #region Methods
        // effects: See CqlBlock.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, bool isTopLevel, int indentLevel) {
            // The SELECT part 
            GenerateProjectedtList(builder, indentLevel, CqlAlias, true);
 
            // The FROM part by joining all the children using ON Clauses 
            builder.Append("FROM ");
            int i = 0; 
            foreach (CqlBlock child in Children) {
                if (i > 0) {
 					StringUtil.IndentNewLine(builder, indentLevel + 1);
                    builder.Append(OpCellTreeNode.OpToCql(m_opType)); 
                }
                builder.Append(" ("); 
                child.AsCql(builder, false, indentLevel + 1); 
                builder.Append(") AS ")
                       .Append(child.CqlAlias); 

                // The ON part
                if (i > 0) {
					StringUtil.IndentNewLine(builder, indentLevel + 1); 
                    builder.Append("ON ");
                    m_onClauses[i - 1].AsCql(builder); 
                } 
                i++;
            } 
            return builder;
        }
        #endregion
 
        // A class that represents "slot1 == slot2 AND "slot3 == slot4" ...
        // for two join blocks. That is, it is complete ON clause 
        internal class OnClause : InternalBase { 
            #region Constructor
            internal OnClause() { 
                m_singleClauses = new List();
            }
            #endregion
 
            #region Fields
            private List m_singleClauses; 
            #endregion 

            #region Methods 
            // effects: Modified builder to contain a Cql string of the form "Slot1 = Slot2 AND
            // slot3 = slot4 AND ... Returns the builder
            internal StringBuilder AsCql(StringBuilder builder) {
                bool isFirst = true; 
                foreach (SingleClause singleClause in m_singleClauses) {
                    if (false == isFirst) { 
                        builder.Append(" AND "); 
                    }
                    singleClause.AsCql(builder); 
                    isFirst = false;
                }
                return builder;
            } 

            // effects: Adds an OnClause element for a join of the form "firstSlot = secondSlot" 
            internal void Add(AliasedSlot firstSlot, AliasedSlot secondSlot) { 
                SingleClause singleClause = new SingleClause(firstSlot, secondSlot);
                m_singleClauses.Add(singleClause); 
            }

            internal override void ToCompactString(StringBuilder builder) {
                builder.Append("ON "); 
                StringUtil.ToSeparatedString(builder, m_singleClauses, " AND ");
            } 
 
            #endregion
 
            #region Struct
            // Denotes an expression between slots of the form: FirstSlot == SecondSlot
            private class SingleClause : InternalBase {
                internal SingleClause(AliasedSlot firstSlot, AliasedSlot secondSlot) { 
                    m_firstSlot = firstSlot;
                    m_secondSlot = secondSlot; 
                } 

                #region Fields 
                private AliasedSlot m_firstSlot;
                private AliasedSlot m_secondSlot;
                #endregion
 
                #region Methods
                // effects: Modifies builder to constain the Cql string of the form "firstSlot = secondSlot" 
                // Returns the modified builder 
                internal StringBuilder AsCql(StringBuilder builder) {
                    builder.Append(m_firstSlot.FullCqlAlias()) 
                           .Append(" = ")
                           .Append(m_secondSlot.FullCqlAlias());
                    return builder;
                } 

                internal override void ToCompactString(StringBuilder builder) { 
                    m_firstSlot.ToCompactString(builder); 
                    builder.Append(" = ");
                    m_secondSlot.ToCompactString(builder); 
                }
                #endregion
            }
            #endregion 
        }
    } 
} 

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

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

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // This class corresponds to the various Join nodes in the view, i.e.,
    // IJ, LOJ, FOJ 
    internal class JoinCqlBlock : CqlBlock {
        #region Constructor
        // effects: Creates a Join CqlBlock (type given by opType) with
        // SELECT (slotinfos), FROM (children), ON (onClauses - one for each child except 0th), 
        // WHERE (true), AS (blockAliasNum)
        internal JoinCqlBlock(CellTreeOpType opType, SlotInfo[] slotInfos, List children, 
                              List onClauses, CqlIdentifiers identifiers, int blockAliasNum) : 
            base(slotInfos, children, BoolExpression.True, identifiers, blockAliasNum) {
            m_opType = opType; 
            m_onClauses = onClauses;
        }
        #endregion
 
        #region Fields
        private CellTreeOpType m_opType; // LOJ or IJ etc 
        private List m_onClauses; 
        #endregion
 
        #region Methods
        // effects: See CqlBlock.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, bool isTopLevel, int indentLevel) {
            // The SELECT part 
            GenerateProjectedtList(builder, indentLevel, CqlAlias, true);
 
            // The FROM part by joining all the children using ON Clauses 
            builder.Append("FROM ");
            int i = 0; 
            foreach (CqlBlock child in Children) {
                if (i > 0) {
 					StringUtil.IndentNewLine(builder, indentLevel + 1);
                    builder.Append(OpCellTreeNode.OpToCql(m_opType)); 
                }
                builder.Append(" ("); 
                child.AsCql(builder, false, indentLevel + 1); 
                builder.Append(") AS ")
                       .Append(child.CqlAlias); 

                // The ON part
                if (i > 0) {
					StringUtil.IndentNewLine(builder, indentLevel + 1); 
                    builder.Append("ON ");
                    m_onClauses[i - 1].AsCql(builder); 
                } 
                i++;
            } 
            return builder;
        }
        #endregion
 
        // A class that represents "slot1 == slot2 AND "slot3 == slot4" ...
        // for two join blocks. That is, it is complete ON clause 
        internal class OnClause : InternalBase { 
            #region Constructor
            internal OnClause() { 
                m_singleClauses = new List();
            }
            #endregion
 
            #region Fields
            private List m_singleClauses; 
            #endregion 

            #region Methods 
            // effects: Modified builder to contain a Cql string of the form "Slot1 = Slot2 AND
            // slot3 = slot4 AND ... Returns the builder
            internal StringBuilder AsCql(StringBuilder builder) {
                bool isFirst = true; 
                foreach (SingleClause singleClause in m_singleClauses) {
                    if (false == isFirst) { 
                        builder.Append(" AND "); 
                    }
                    singleClause.AsCql(builder); 
                    isFirst = false;
                }
                return builder;
            } 

            // effects: Adds an OnClause element for a join of the form "firstSlot = secondSlot" 
            internal void Add(AliasedSlot firstSlot, AliasedSlot secondSlot) { 
                SingleClause singleClause = new SingleClause(firstSlot, secondSlot);
                m_singleClauses.Add(singleClause); 
            }

            internal override void ToCompactString(StringBuilder builder) {
                builder.Append("ON "); 
                StringUtil.ToSeparatedString(builder, m_singleClauses, " AND ");
            } 
 
            #endregion
 
            #region Struct
            // Denotes an expression between slots of the form: FirstSlot == SecondSlot
            private class SingleClause : InternalBase {
                internal SingleClause(AliasedSlot firstSlot, AliasedSlot secondSlot) { 
                    m_firstSlot = firstSlot;
                    m_secondSlot = secondSlot; 
                } 

                #region Fields 
                private AliasedSlot m_firstSlot;
                private AliasedSlot m_secondSlot;
                #endregion
 
                #region Methods
                // effects: Modifies builder to constain the Cql string of the form "firstSlot = secondSlot" 
                // Returns the modified builder 
                internal StringBuilder AsCql(StringBuilder builder) {
                    builder.Append(m_firstSlot.FullCqlAlias()) 
                           .Append(" = ")
                           .Append(m_secondSlot.FullCqlAlias());
                    return builder;
                } 

                internal override void ToCompactString(StringBuilder builder) { 
                    m_firstSlot.ToCompactString(builder); 
                    builder.Append(" = ");
                    m_secondSlot.ToCompactString(builder); 
                }
                #endregion
            }
            #endregion 
        }
    } 
} 

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

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