SlotInfo.cs source code in C# .NET

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

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

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // A class that keeps track of slot information in a CqlBlock
    internal class SlotInfo : InternalBase { 
        #region Constructor
        // effects: Creates a SlotInfo for a CqlBlock X with information
        // about whether this slot is needed by X's parent
        // (isRequiredByParent), whether X projects it (isProjected) along with 
        // the slot value (slot) and the output member path (for
        // regular/non-boolean slots) for the slot 
        internal SlotInfo(bool isRequiredByParent, bool isProjected, ProjectedSlot slot, 
                          MemberPath memberPath) :
            this(isRequiredByParent, isProjected, slot, memberPath, false /* enforceNotNull */) { 
        }

        // We need to ensure that _from variables are never null since
        // view generation uses 2-valued boolean logic. 
        // If enforceNotNull=true, the generated CQL adds a condition (AND slot NOT NULL)
        // This flag is used only for boolean slots. 
        internal SlotInfo(bool isRequiredByParent, bool isProjected, ProjectedSlot slot, 
                          MemberPath memberPath, bool enforceNotNull) {
            m_isRequiredByParent = isRequiredByParent; 
            m_isProjected = isProjected;
            m_slot = slot;
            m_memberPath = memberPath;
            m_enforceNotNull = enforceNotNull; 
            Debug.Assert(false == m_isRequiredByParent || m_slot != null,
                         "Required slots cannot be null"); 
            Debug.Assert(m_slot is AliasedSlot || 
                         (m_slot == null && m_memberPath == null) || // unused boolean slot
                         (m_slot is BooleanProjectedSlot ) == (m_memberPath == null), 
                         "If slot is boolean slot, there is no member path for it and vice-versa");
        }
        #endregion
 
        #region Fields
        private bool m_isRequiredByParent; // If slot is required by the parent 
        private bool m_isProjected;  // If the node is capable of projecting this slot 
        private ProjectedSlot m_slot; // The slot represented by this SlotInfo
        private MemberPath m_memberPath; // The output member path of this slot 
        private bool m_enforceNotNull; // Whether to add AND NOT NULL to CQL
        #endregion

        #region Properties 
        // effects: Returns true iff this slot is required by the CqlBlock's parent
        internal bool IsRequiredByParent { 
            get { return m_isRequiredByParent; } 
        }
 
        // effects: Returns true iff this slot is projected by this CqlBlock
        internal bool IsProjected {
            get { return m_isProjected; }
        } 

        // effects: Returns the output memberpath of this slot 
        internal MemberPath MemberPath { 
            get { return m_memberPath;}
        } 

        // effects: Returns the slot corresponfing to this object
        internal ProjectedSlot SlotValue {
            get { return m_slot; } 
        }
 
        // effects: Returns the Cql Alias for this slot, e.g., CPerson1_Pid, _from0 
        internal string CqlFieldAlias {
            get { return m_slot.CqlFieldAlias(m_memberPath); } 
        }

        // effects: Returns true if CQL generated for slot needs to have an extra AND IS NOT NULL condition
        internal bool IsEnforcedNotNull { 
            get { return m_enforceNotNull; }
        } 
        #endregion 

        #region Methods 
        // effects: Sets the isrequiredbyparent to false. Note we don't have
        // a setter because we don't want people to set this field to true
        // after the object has been created
        internal void ResetIsRequiredByParent() { 
            m_isRequiredByParent = false;
        } 
 
        // effects: Modifies builder to contain a Cql representation of this
        // and returns the modified builder. For different slots, the result 
        // is different, e.g., _from0, CPerson1.pid, TREAT(....)
        internal StringBuilder AsCql(StringBuilder builder, string blockAlias, int indentLevel) {
            if (m_enforceNotNull) {
                builder.Append('('); 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel);
                builder.Append(" AND "); 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel); 
                builder.Append(" IS NOT NULL)");
            } else { 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel);
            }
            return builder;
        } 

        internal override void ToCompactString(StringBuilder builder) { 
            if (m_slot != null) { 
                builder.Append(CqlFieldAlias);
            } 
        }
        #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.Data.Mapping.ViewGeneration.Structures;
using System.Text;
using System.Diagnostics; 

namespace System.Data.Mapping.ViewGeneration.CqlGeneration { 
 
    // A class that keeps track of slot information in a CqlBlock
    internal class SlotInfo : InternalBase { 
        #region Constructor
        // effects: Creates a SlotInfo for a CqlBlock X with information
        // about whether this slot is needed by X's parent
        // (isRequiredByParent), whether X projects it (isProjected) along with 
        // the slot value (slot) and the output member path (for
        // regular/non-boolean slots) for the slot 
        internal SlotInfo(bool isRequiredByParent, bool isProjected, ProjectedSlot slot, 
                          MemberPath memberPath) :
            this(isRequiredByParent, isProjected, slot, memberPath, false /* enforceNotNull */) { 
        }

        // We need to ensure that _from variables are never null since
        // view generation uses 2-valued boolean logic. 
        // If enforceNotNull=true, the generated CQL adds a condition (AND slot NOT NULL)
        // This flag is used only for boolean slots. 
        internal SlotInfo(bool isRequiredByParent, bool isProjected, ProjectedSlot slot, 
                          MemberPath memberPath, bool enforceNotNull) {
            m_isRequiredByParent = isRequiredByParent; 
            m_isProjected = isProjected;
            m_slot = slot;
            m_memberPath = memberPath;
            m_enforceNotNull = enforceNotNull; 
            Debug.Assert(false == m_isRequiredByParent || m_slot != null,
                         "Required slots cannot be null"); 
            Debug.Assert(m_slot is AliasedSlot || 
                         (m_slot == null && m_memberPath == null) || // unused boolean slot
                         (m_slot is BooleanProjectedSlot ) == (m_memberPath == null), 
                         "If slot is boolean slot, there is no member path for it and vice-versa");
        }
        #endregion
 
        #region Fields
        private bool m_isRequiredByParent; // If slot is required by the parent 
        private bool m_isProjected;  // If the node is capable of projecting this slot 
        private ProjectedSlot m_slot; // The slot represented by this SlotInfo
        private MemberPath m_memberPath; // The output member path of this slot 
        private bool m_enforceNotNull; // Whether to add AND NOT NULL to CQL
        #endregion

        #region Properties 
        // effects: Returns true iff this slot is required by the CqlBlock's parent
        internal bool IsRequiredByParent { 
            get { return m_isRequiredByParent; } 
        }
 
        // effects: Returns true iff this slot is projected by this CqlBlock
        internal bool IsProjected {
            get { return m_isProjected; }
        } 

        // effects: Returns the output memberpath of this slot 
        internal MemberPath MemberPath { 
            get { return m_memberPath;}
        } 

        // effects: Returns the slot corresponfing to this object
        internal ProjectedSlot SlotValue {
            get { return m_slot; } 
        }
 
        // effects: Returns the Cql Alias for this slot, e.g., CPerson1_Pid, _from0 
        internal string CqlFieldAlias {
            get { return m_slot.CqlFieldAlias(m_memberPath); } 
        }

        // effects: Returns true if CQL generated for slot needs to have an extra AND IS NOT NULL condition
        internal bool IsEnforcedNotNull { 
            get { return m_enforceNotNull; }
        } 
        #endregion 

        #region Methods 
        // effects: Sets the isrequiredbyparent to false. Note we don't have
        // a setter because we don't want people to set this field to true
        // after the object has been created
        internal void ResetIsRequiredByParent() { 
            m_isRequiredByParent = false;
        } 
 
        // effects: Modifies builder to contain a Cql representation of this
        // and returns the modified builder. For different slots, the result 
        // is different, e.g., _from0, CPerson1.pid, TREAT(....)
        internal StringBuilder AsCql(StringBuilder builder, string blockAlias, int indentLevel) {
            if (m_enforceNotNull) {
                builder.Append('('); 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel);
                builder.Append(" AND "); 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel); 
                builder.Append(" IS NOT NULL)");
            } else { 
                m_slot.AsCql(builder, m_memberPath, blockAlias, indentLevel);
            }
            return builder;
        } 

        internal override void ToCompactString(StringBuilder builder) { 
            if (m_slot != null) { 
                builder.Append(CqlFieldAlias);
            } 
        }
        #endregion
    }
} 

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