Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Map / ViewGeneration / Structures / NegatedConstant.cs / 1305376 / NegatedConstant.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 NegatedConstant : Constant
{
#region Constructors
// effects: Creates NOT(NULL}
internal static NegatedConstant CreateNotNull()
{
NegatedConstant result = new NegatedConstant();
result.m_negatedDomain.Add(Constant.Null);
return result;
}
// effects: Creates an empty domain
private NegatedConstant()
{
m_negatedDomain = new Set(Constant.EqualityComparer);
}
// requires: values has no NegatedCellConstant
// effects: Creates a negated constant with the values in it
internal NegatedConstant(IEnumerable values)
{
m_negatedDomain = new Set(values, Constant.EqualityComparer);
}
#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(Constant 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(Constant.Null);
}
// effects: Returns true if this contains "NotNull"
internal override bool HasNotNull()
{
return m_negatedDomain.Contains(Constant.Null);
}
// effects: Returns a hash value for this
protected override int GetHash()
{
int result = 0;
foreach (Constant constant in m_negatedDomain)
{
result ^= Constant.EqualityComparer.GetHashCode(constant);
}
return result;
}
// effects: Returns true if right has the same contents as this
protected override bool IsEqualTo(Constant right)
{
NegatedConstant rightNegatedConstant = right as NegatedConstant;
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 (Constant 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, Constant.EqualityComparer);
foreach (Constant 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(Constant.Null);
negatedConstants.Remove(Constant.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 (Constant 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 NegatedConstant : Constant
{
#region Constructors
// effects: Creates NOT(NULL}
internal static NegatedConstant CreateNotNull()
{
NegatedConstant result = new NegatedConstant();
result.m_negatedDomain.Add(Constant.Null);
return result;
}
// effects: Creates an empty domain
private NegatedConstant()
{
m_negatedDomain = new Set(Constant.EqualityComparer);
}
// requires: values has no NegatedCellConstant
// effects: Creates a negated constant with the values in it
internal NegatedConstant(IEnumerable values)
{
m_negatedDomain = new Set(values, Constant.EqualityComparer);
}
#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(Constant 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(Constant.Null);
}
// effects: Returns true if this contains "NotNull"
internal override bool HasNotNull()
{
return m_negatedDomain.Contains(Constant.Null);
}
// effects: Returns a hash value for this
protected override int GetHash()
{
int result = 0;
foreach (Constant constant in m_negatedDomain)
{
result ^= Constant.EqualityComparer.GetHashCode(constant);
}
return result;
}
// effects: Returns true if right has the same contents as this
protected override bool IsEqualTo(Constant right)
{
NegatedConstant rightNegatedConstant = right as NegatedConstant;
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 (Constant 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, Constant.EqualityComparer);
foreach (Constant 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(Constant.Null);
negatedConstants.Remove(Constant.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 (Constant 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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