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

using System.Text; 
using System.Data.Common.Utils;
using System.Data.Mapping.ViewGeneration.CqlGeneration;
using System.Data.Mapping.ViewGeneration.Utils;
using System.Data.Metadata.Edm; 

namespace System.Data.Mapping.ViewGeneration.Structures { 
 
    // A class that denotes a constant value that can be stored in a
    // multiconstant or in a projected slot of a cellquery 
    internal class ScalarConstant : CellConstant {

        #region Constructor
        // effects: Creates a scalar constant corresponding to value 
        internal ScalarConstant(object value) {
            m_scalar = value; 
        } 
        #endregion
 
        #region Fields
        private object m_scalar; // The actual value of the scalar
        #endregion
 
        #region Properties
        internal object Value { 
            get { return m_scalar;} 
        }
        #endregion 

        #region Methods
 		// effects: See CellConstant.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, MemberPath outputMember, 
                                              string blockAlias) {
 
            // A constant path better be more than just the extent 
            EdmType constType = Helper.GetModelTypeUsage(outputMember.LastMember).EdmType;
            // Some built-in constants 
            if (BuiltInTypeKind.PrimitiveType == constType.BuiltInTypeKind) {
                PrimitiveTypeKind primitiveTypeKind = ((PrimitiveType)constType).PrimitiveTypeKind;
                if (primitiveTypeKind == PrimitiveTypeKind.Boolean) {
                    // This better be a boolean. Else we crash! 
                    bool val = (bool)m_scalar;
                    string value = StringUtil.FormatInvariant("{0}", val); 
                    builder.Append(value); 
                    return builder;
                } else if (primitiveTypeKind == PrimitiveTypeKind.String) { 
                    // It's a string: no need to cast
                    AppendEscapedScalar(builder);
                    return builder;
                } 
            } else if (BuiltInTypeKind.EnumType == constType.BuiltInTypeKind) {
                // Enumerated type - we should be able to cast it 
                EnumMember enumValue = (EnumMember) m_scalar; 
                builder.Append(enumValue.Name);
                return builder; 
            }

            // Need to cast
            builder.Append("CAST("); 
            AppendEscapedScalar(builder);
            builder.Append(" AS "); 
            CqlWriter.AppendEscapedTypeName(builder, constType); 
            builder.Append(')');
			return builder; 
        }

        // effects: Modifies builder to contain an escaped version of this
        private StringBuilder AppendEscapedScalar(StringBuilder builder) { 
            string value = StringUtil.FormatInvariant("{0}", m_scalar);
			if (value.Contains("'")) { 
                // Deal with strings with ' by doubling it 
                value = value.Replace("'", "''");
            } 
            StringUtil.FormatStringBuilder(builder, "'{0}'", value);
            return builder;
        }
 
        // Returns true if this is semantically equivalent to obj
        protected override bool IsEqualTo(CellConstant right) { 
            ScalarConstant rightScalarConstant = right as ScalarConstant; 
            if (rightScalarConstant == null) {
                return false; 
            }

            return CdpEqualityComparer.DefaultEqualityComparer.Equals(m_scalar, rightScalarConstant.m_scalar);
        } 

        protected override int GetHash() { 
            if (m_scalar == null) { 
                return 1;
            } else { 
                return m_scalar.GetHashCode();
            }
        }
 
        private void InternalToString(StringBuilder builder, bool isInvariant) {
            EnumMember enumMember = m_scalar as EnumMember; 
            if (enumMember != null) { 
                builder.Append(enumMember.Name);
            } else if (m_scalar == null) { 
                builder.Append(isInvariant? "NULL": System.Data.Entity.Strings.ViewGen_Null);
            } else {
                builder.Append(StringUtil.FormatInvariant("'{0}'", m_scalar));
            } 
        }
 
        internal override string ToUserString() { 
            StringBuilder builder = new StringBuilder();
            InternalToString(builder, false); 
            return builder.ToString();
        }

        internal override void ToCompactString(StringBuilder builder) { 
            InternalToString(builder, true);
        } 
        #endregion 

    } 
}

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

using System.Text; 
using System.Data.Common.Utils;
using System.Data.Mapping.ViewGeneration.CqlGeneration;
using System.Data.Mapping.ViewGeneration.Utils;
using System.Data.Metadata.Edm; 

namespace System.Data.Mapping.ViewGeneration.Structures { 
 
    // A class that denotes a constant value that can be stored in a
    // multiconstant or in a projected slot of a cellquery 
    internal class ScalarConstant : CellConstant {

        #region Constructor
        // effects: Creates a scalar constant corresponding to value 
        internal ScalarConstant(object value) {
            m_scalar = value; 
        } 
        #endregion
 
        #region Fields
        private object m_scalar; // The actual value of the scalar
        #endregion
 
        #region Properties
        internal object Value { 
            get { return m_scalar;} 
        }
        #endregion 

        #region Methods
 		// effects: See CellConstant.AsCql
        internal override StringBuilder AsCql(StringBuilder builder, MemberPath outputMember, 
                                              string blockAlias) {
 
            // A constant path better be more than just the extent 
            EdmType constType = Helper.GetModelTypeUsage(outputMember.LastMember).EdmType;
            // Some built-in constants 
            if (BuiltInTypeKind.PrimitiveType == constType.BuiltInTypeKind) {
                PrimitiveTypeKind primitiveTypeKind = ((PrimitiveType)constType).PrimitiveTypeKind;
                if (primitiveTypeKind == PrimitiveTypeKind.Boolean) {
                    // This better be a boolean. Else we crash! 
                    bool val = (bool)m_scalar;
                    string value = StringUtil.FormatInvariant("{0}", val); 
                    builder.Append(value); 
                    return builder;
                } else if (primitiveTypeKind == PrimitiveTypeKind.String) { 
                    // It's a string: no need to cast
                    AppendEscapedScalar(builder);
                    return builder;
                } 
            } else if (BuiltInTypeKind.EnumType == constType.BuiltInTypeKind) {
                // Enumerated type - we should be able to cast it 
                EnumMember enumValue = (EnumMember) m_scalar; 
                builder.Append(enumValue.Name);
                return builder; 
            }

            // Need to cast
            builder.Append("CAST("); 
            AppendEscapedScalar(builder);
            builder.Append(" AS "); 
            CqlWriter.AppendEscapedTypeName(builder, constType); 
            builder.Append(')');
			return builder; 
        }

        // effects: Modifies builder to contain an escaped version of this
        private StringBuilder AppendEscapedScalar(StringBuilder builder) { 
            string value = StringUtil.FormatInvariant("{0}", m_scalar);
			if (value.Contains("'")) { 
                // Deal with strings with ' by doubling it 
                value = value.Replace("'", "''");
            } 
            StringUtil.FormatStringBuilder(builder, "'{0}'", value);
            return builder;
        }
 
        // Returns true if this is semantically equivalent to obj
        protected override bool IsEqualTo(CellConstant right) { 
            ScalarConstant rightScalarConstant = right as ScalarConstant; 
            if (rightScalarConstant == null) {
                return false; 
            }

            return CdpEqualityComparer.DefaultEqualityComparer.Equals(m_scalar, rightScalarConstant.m_scalar);
        } 

        protected override int GetHash() { 
            if (m_scalar == null) { 
                return 1;
            } else { 
                return m_scalar.GetHashCode();
            }
        }
 
        private void InternalToString(StringBuilder builder, bool isInvariant) {
            EnumMember enumMember = m_scalar as EnumMember; 
            if (enumMember != null) { 
                builder.Append(enumMember.Name);
            } else if (m_scalar == null) { 
                builder.Append(isInvariant? "NULL": System.Data.Entity.Strings.ViewGen_Null);
            } else {
                builder.Append(StringUtil.FormatInvariant("'{0}'", m_scalar));
            } 
        }
 
        internal override string ToUserString() { 
            StringBuilder builder = new StringBuilder();
            InternalToString(builder, false); 
            return builder.ToString();
        }

        internal override void ToCompactString(StringBuilder builder) { 
            InternalToString(builder, true);
        } 
        #endregion 

    } 
}

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