NegatedCellConstant.cs source code in C# .NET

                        
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 / Structures / NegatedCellConstant.cs / 2 / NegatedCellConstant.cs
                        

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

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

namespace System.Data.Mapping.ViewGeneration.Structures { 

    // A class that represents NOT(elements), e.g., NOT(1, 2, NULL), i.e.,
    // all values other than null, 1 and 2
    internal class NegatedCellConstant : CellConstant { 

        #region Constructors 
        // effects: Creates NOT(NULL} 
        internal static NegatedCellConstant CreateNotNull() {
            NegatedCellConstant result = new NegatedCellConstant(); 
            result.m_negatedDomain.Add(CellConstant.Null);
            return result;
        }
 
        // effects: Creates an empty domain
        private NegatedCellConstant() { 
            m_negatedDomain = new Set(CellConstant.EqualityComparer); 
        }
 
        // requires: values has no NegatedCellConstant
        // effects: Creates a negated constant with the values in it
        internal NegatedCellConstant(IEnumerable values) {
            m_negatedDomain = new Set(values, CellConstant.EqualityComparer); 
            Debug.Assert(CheckRepInvariantLocal());
        } 
        #endregion 

        #region Fields 
        private Set m_negatedDomain; // e.g., NOT(1, 2, Undefined)
        #endregion

        #region Properties 
        internal IEnumerable Elements {
            get { return m_negatedDomain;} 
        } 
        #endregion
 

        #region Methods
        // effects: Returns true if this contains "constant"
        internal bool Contains(CellConstant constant) { 
            return m_negatedDomain.Contains(constant);
        } 
 
        // effects: Returns true if this represents "NotNull" precisely
        internal override bool IsNotNull() { 
            return m_negatedDomain.Count == 1 && m_negatedDomain.Contains(CellConstant.Null);
        }

        // effects: Returns true if this contains "NotNull" 
        internal override bool HasNotNull() {
            return m_negatedDomain.Contains(CellConstant.Null); 
        } 

        internal override bool CheckRepInvariant() { 
            return CheckRepInvariantLocal();
        }

        // effects: Make sure that this negated constant's invariants are valid 
        internal bool CheckRepInvariantLocal() {
            // NOT cannot contain negated cell constants 
            foreach (CellConstant constant in Elements) { 
                Debug.Assert(constant as NegatedCellConstant == null, "NegatedCellConstant in NegatedCellConstant?");
            } 
            return true;
        }

        // effects: Returns a hash value for this 
        protected override int GetHash() {
            int result = 0; 
            foreach (CellConstant constant in m_negatedDomain) { 
                result ^= CellConstant.EqualityComparer.GetHashCode(constant);
            } 
            return result;
        }

        // effects: Returns true if right has the same contents as this 
        protected override bool IsEqualTo(CellConstant right) {
            NegatedCellConstant rightNegatedConstant = right as NegatedCellConstant; 
            if (rightNegatedConstant == null) { 
                return false;
            } 

            return m_negatedDomain.SetEquals(rightNegatedConstant.m_negatedDomain);
        }
 
        // effects: Given a set of positive constants (constants) and this,
        // generates a Cql expression, e.g., 7, NOT(7, NULL) means NOT NULL 
        //   7, 8, NOT(7, 8, 9, 10) Means NOT(9, 10) 
        //   Note: NOT(9, NULL) is NOT (a is 9 OR a is NULL) =
        //   A IS NOT 9 AND A IS NOT NULL 
        internal StringBuilder AsCql(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull) {
            return ToStringHelper(builder, blockAlias, constants, path, canSkipIsNotNull, false);
        }
 
        // effects: Given a set of constants, generates "Slot = X AND Slot = Y"  or  "Slot <> X AND Slot <> Y" (depending ifGenerateEquals)
        private static void GenerateAndsForSlot(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool anyAdded, bool userString) { 
            foreach (CellConstant constant in constants) { 
                if (anyAdded) {
                    builder.Append(" AND "); 
                }
                anyAdded = true;

                if (userString) 
                {
                    path.ToCompactString(builder, blockAlias); 
                    builder.Append(" <>"); 
                    constant.ToCompactString(builder);
                } 
                else
                {
                    path.AsCql(builder, blockAlias);
                    builder.Append(" <>"); 
                    constant.AsCql(builder, path, blockAlias);
                } 
            } 
        }
 

        private StringBuilder ToStringHelper(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull, bool userString)
        {
            bool isNullable = path.IsNullable; 
            // Remove all the constants from negated and then print NOT
            // .. AND NOT .. AND NOT ... 
            Set negatedConstants = new Set(Elements, CellConstant.EqualityComparer); 
            foreach (CellConstant constant in constants)
            { 
                if (constant.Equals(this)) { continue; }
                Debug.Assert(negatedConstants.Contains(constant), "Negated constant must contain all positive constants");
                negatedConstants.Remove(constant);
            } 

            if (negatedConstants.Count == 0) 
            { // All constants cancel out 
                builder.Append("true");
                return builder; 
            }
            bool hasNull = negatedConstants.Contains(CellConstant.Null);
            negatedConstants.Remove(CellConstant.Null);
            // We always add IS NOT NULL if the property is nullable (and we 
            // cannot skip IS NOT NULL). Also, if the domain contains NOT
            // NULL, we must add it 
            bool anyAdded = false; 
            if (hasNull || (isNullable && canSkipIsNotNull == false))
            { 
                if (userString)
                {
                    path.ToCompactString(builder, blockAlias);
                    builder.Append(" is not NULL"); 
                }
                else 
                { 
                    path.AsCql(builder, blockAlias);
                    builder.Append(" IS NOT NULL"); 
                }

                anyAdded = true;
            } 

            GenerateAndsForSlot(builder, blockAlias, negatedConstants, path, anyAdded, userString); 
            return builder; 
        }
 
        internal StringBuilder AsUserString(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull)
        {
            return ToStringHelper(builder, blockAlias, constants, path, canSkipIsNotNull, true);
        } 

 
 
        internal override string ToUserString() {
            if (IsNotNull()) { 
                return System.Data.Entity.Strings.ViewGen_NotNull;
            } else {
                StringBuilder builder = new StringBuilder();
                bool isFirst = true; 
                foreach (CellConstant constant in m_negatedDomain) {
                    // Skip printing out Null if m_negatedDomain has other values 
                    if (m_negatedDomain.Count > 1 && constant.IsNull()) { 
                        continue;
                    } 
                    if (isFirst == false) {
                        builder.Append(System.Data.Entity.Strings.ViewGen_CommaBlank);
                    }
                    isFirst = false; 
                    builder.Append(constant.ToUserString());
                } 
                StringBuilder result = new StringBuilder(); 
                result.Append(Strings.ViewGen_NegatedCellConstant_0(builder.ToString()));
                return result.ToString(); 
            }
        }

        internal override void ToCompactString(StringBuilder builder) { 
            // Special code for NOT NULL
            if (IsNotNull()) { 
                builder.Append("NOT_NULL"); 
            } else {
                builder.Append("NOT("); 
                StringUtil.ToCommaSeparatedStringSorted(builder, m_negatedDomain);
                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.Common.Utils;
using System.Text;
using System.Diagnostics; 
using System.Data.Mapping.ViewGeneration.Utils;
using System.Data.Entity; 
 

namespace System.Data.Mapping.ViewGeneration.Structures { 

    // A class that represents NOT(elements), e.g., NOT(1, 2, NULL), i.e.,
    // all values other than null, 1 and 2
    internal class NegatedCellConstant : CellConstant { 

        #region Constructors 
        // effects: Creates NOT(NULL} 
        internal static NegatedCellConstant CreateNotNull() {
            NegatedCellConstant result = new NegatedCellConstant(); 
            result.m_negatedDomain.Add(CellConstant.Null);
            return result;
        }
 
        // effects: Creates an empty domain
        private NegatedCellConstant() { 
            m_negatedDomain = new Set(CellConstant.EqualityComparer); 
        }
 
        // requires: values has no NegatedCellConstant
        // effects: Creates a negated constant with the values in it
        internal NegatedCellConstant(IEnumerable values) {
            m_negatedDomain = new Set(values, CellConstant.EqualityComparer); 
            Debug.Assert(CheckRepInvariantLocal());
        } 
        #endregion 

        #region Fields 
        private Set m_negatedDomain; // e.g., NOT(1, 2, Undefined)
        #endregion

        #region Properties 
        internal IEnumerable Elements {
            get { return m_negatedDomain;} 
        } 
        #endregion
 

        #region Methods
        // effects: Returns true if this contains "constant"
        internal bool Contains(CellConstant constant) { 
            return m_negatedDomain.Contains(constant);
        } 
 
        // effects: Returns true if this represents "NotNull" precisely
        internal override bool IsNotNull() { 
            return m_negatedDomain.Count == 1 && m_negatedDomain.Contains(CellConstant.Null);
        }

        // effects: Returns true if this contains "NotNull" 
        internal override bool HasNotNull() {
            return m_negatedDomain.Contains(CellConstant.Null); 
        } 

        internal override bool CheckRepInvariant() { 
            return CheckRepInvariantLocal();
        }

        // effects: Make sure that this negated constant's invariants are valid 
        internal bool CheckRepInvariantLocal() {
            // NOT cannot contain negated cell constants 
            foreach (CellConstant constant in Elements) { 
                Debug.Assert(constant as NegatedCellConstant == null, "NegatedCellConstant in NegatedCellConstant?");
            } 
            return true;
        }

        // effects: Returns a hash value for this 
        protected override int GetHash() {
            int result = 0; 
            foreach (CellConstant constant in m_negatedDomain) { 
                result ^= CellConstant.EqualityComparer.GetHashCode(constant);
            } 
            return result;
        }

        // effects: Returns true if right has the same contents as this 
        protected override bool IsEqualTo(CellConstant right) {
            NegatedCellConstant rightNegatedConstant = right as NegatedCellConstant; 
            if (rightNegatedConstant == null) { 
                return false;
            } 

            return m_negatedDomain.SetEquals(rightNegatedConstant.m_negatedDomain);
        }
 
        // effects: Given a set of positive constants (constants) and this,
        // generates a Cql expression, e.g., 7, NOT(7, NULL) means NOT NULL 
        //   7, 8, NOT(7, 8, 9, 10) Means NOT(9, 10) 
        //   Note: NOT(9, NULL) is NOT (a is 9 OR a is NULL) =
        //   A IS NOT 9 AND A IS NOT NULL 
        internal StringBuilder AsCql(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull) {
            return ToStringHelper(builder, blockAlias, constants, path, canSkipIsNotNull, false);
        }
 
        // effects: Given a set of constants, generates "Slot = X AND Slot = Y"  or  "Slot <> X AND Slot <> Y" (depending ifGenerateEquals)
        private static void GenerateAndsForSlot(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool anyAdded, bool userString) { 
            foreach (CellConstant constant in constants) { 
                if (anyAdded) {
                    builder.Append(" AND "); 
                }
                anyAdded = true;

                if (userString) 
                {
                    path.ToCompactString(builder, blockAlias); 
                    builder.Append(" <>"); 
                    constant.ToCompactString(builder);
                } 
                else
                {
                    path.AsCql(builder, blockAlias);
                    builder.Append(" <>"); 
                    constant.AsCql(builder, path, blockAlias);
                } 
            } 
        }
 

        private StringBuilder ToStringHelper(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull, bool userString)
        {
            bool isNullable = path.IsNullable; 
            // Remove all the constants from negated and then print NOT
            // .. AND NOT .. AND NOT ... 
            Set negatedConstants = new Set(Elements, CellConstant.EqualityComparer); 
            foreach (CellConstant constant in constants)
            { 
                if (constant.Equals(this)) { continue; }
                Debug.Assert(negatedConstants.Contains(constant), "Negated constant must contain all positive constants");
                negatedConstants.Remove(constant);
            } 

            if (negatedConstants.Count == 0) 
            { // All constants cancel out 
                builder.Append("true");
                return builder; 
            }
            bool hasNull = negatedConstants.Contains(CellConstant.Null);
            negatedConstants.Remove(CellConstant.Null);
            // We always add IS NOT NULL if the property is nullable (and we 
            // cannot skip IS NOT NULL). Also, if the domain contains NOT
            // NULL, we must add it 
            bool anyAdded = false; 
            if (hasNull || (isNullable && canSkipIsNotNull == false))
            { 
                if (userString)
                {
                    path.ToCompactString(builder, blockAlias);
                    builder.Append(" is not NULL"); 
                }
                else 
                { 
                    path.AsCql(builder, blockAlias);
                    builder.Append(" IS NOT NULL"); 
                }

                anyAdded = true;
            } 

            GenerateAndsForSlot(builder, blockAlias, negatedConstants, path, anyAdded, userString); 
            return builder; 
        }
 
        internal StringBuilder AsUserString(StringBuilder builder, string blockAlias, Set constants, MemberPath path, bool canSkipIsNotNull)
        {
            return ToStringHelper(builder, blockAlias, constants, path, canSkipIsNotNull, true);
        } 

 
 
        internal override string ToUserString() {
            if (IsNotNull()) { 
                return System.Data.Entity.Strings.ViewGen_NotNull;
            } else {
                StringBuilder builder = new StringBuilder();
                bool isFirst = true; 
                foreach (CellConstant constant in m_negatedDomain) {
                    // Skip printing out Null if m_negatedDomain has other values 
                    if (m_negatedDomain.Count > 1 && constant.IsNull()) { 
                        continue;
                    } 
                    if (isFirst == false) {
                        builder.Append(System.Data.Entity.Strings.ViewGen_CommaBlank);
                    }
                    isFirst = false; 
                    builder.Append(constant.ToUserString());
                } 
                StringBuilder result = new StringBuilder(); 
                result.Append(Strings.ViewGen_NegatedCellConstant_0(builder.ToString()));
                return result.ToString(); 
            }
        }

        internal override void ToCompactString(StringBuilder builder) { 
            // Special code for NOT NULL
            if (IsNotNull()) { 
                builder.Append("NOT_NULL"); 
            } else {
                builder.Append("NOT("); 
                StringUtil.ToCommaSeparatedStringSorted(builder, m_negatedDomain);
                builder.Append(")");
            }
        } 
        #endregion
    } 
} 

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

                        

                        
                        

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