Esempio n. 1
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        public object GetParameterValue(int parameterIndex)
        {
            if (this.parameters == null || parameterIndex < 0 || parameterIndex > this.parameters.Count)
            {
                throw Error.ArgumentOutOfRange("parameterIndex");
            }

            // ADO.NET providers require all results to be read before output parameters are visible
            if (this.session != null && !this.session.IsBuffered)
            {
                this.session.Buffer();
            }

            SqlParameterInfo pi             = this.parameters[parameterIndex];
            object           parameterValue = this.command.Parameters[parameterIndex].Value;

            if (parameterValue == DBNull.Value)
            {
                parameterValue = null;
            }
            if (parameterValue != null && parameterValue.GetType() != pi.Parameter.ClrType)
            {
                return(DBConvert.ChangeType(parameterValue, pi.Parameter.ClrType));
            }

            return(parameterValue);
        }
 public static IEnumerable <TOutput> Convert <TOutput>(IEnumerable source)
 {
     foreach (object value in source)
     {
         yield return(DBConvert.ChangeType <TOutput>(value));
     }
 }
Esempio n. 3
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        protected override object GetParameterValue(IProviderType type, object value)
        {
            if (value == null)
            {
                return(DBNull.Value);
            }

            var type2 = value.GetType();

            //if (type2 == typeof(Guid))
            if (type == GuidType)
            {
                return(DBConvert.ChangeType(value, typeof(byte[])));
            }

            var closestRuntimeType = type.GetClosestRuntimeType();

            if (closestRuntimeType == typeof(OracleDecimal))
            {
                return(new OracleDecimal(Convert.ToDecimal(value)));
            }
            if (type2 == typeof(char) && closestRuntimeType == typeof(decimal))
            {
                value = DBConvert.ChangeType(value, typeof(int));
                return(DBConvert.ChangeType(value, closestRuntimeType));
            }
            return(closestRuntimeType == type2 ? value : DBConvert.ChangeType(value, closestRuntimeType));
        }
Esempio n. 4
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 /// <summary>
 /// Changes the type of each element in a specified sequence.
 /// </summary>
 /// <typeparam name="TOutput">The type to convert the elements to.</typeparam>
 /// <param name="source">A sequence that contains elements to convert.</param>
 /// <returns>A sequence that contains the type-converted elements.</returns>
 public static IEnumerable <TOutput> Convert <TOutput>(IEnumerable source)
 {
     //<Convert>d__0<TDataReader, TOutput> d__ = new <Convert>d__0<TDataReader, TOutput>(-2);
     //d__.<>3__source = source;
     //return d__;
     foreach (var item in source)
     {
         yield return(DBConvert.ChangeType <TOutput>(item));
     }
 }
Esempio n. 5
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        protected virtual object GetParameterValue(IProviderType type, object value)
        {
            if (value == null)
            {
                return(DBNull.Value);
            }

            var type2 = value.GetType();
            var closestRuntimeType = type.GetClosestRuntimeType();

            return(closestRuntimeType == type2 ? value : DBConvert.ChangeType(value, closestRuntimeType));
        }
Esempio n. 6
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        private SqlExpression CoerceValueForExpression(SqlValue value, SqlExpression expression)
        {
            object clrValue = value.Value;

            if (!value.ClrType.IsAssignableFrom(expression.ClrType))
            {
                clrValue = DBConvert.ChangeType(clrValue, expression.ClrType);
            }
            ProviderType newSqlType = typeProvider.ChangeTypeFamilyTo(value.SqlType, expression.SqlType);

            return(sql.Value(expression.ClrType, newSqlType, clrValue, value.IsClientSpecified, value.SourceExpression));
        }
Esempio n. 7
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        [ResourceConsumption(ResourceScope.Assembly | ResourceScope.Machine)]      // InitDerivedTypes method call.
        private MetaType InitInheritedType(TypeMapping typeMap, MappedType type)
        {
            this.derivedTypes.Add(type.Type, type);

            if (typeMap.InheritanceCode != null)
            {             // Mapping with no inheritance code: For example, an unmapped intermediate class in a hierarchy.
                if (this.Discriminator == null)
                {
                    throw Error.NoDiscriminatorFound(type.Name);
                }

                if (type.Type.IsAbstract)
                {
                    throw Error.AbstractClassAssignInheritanceDiscriminator(type.Type);
                }

                object keyValue = DBConvert.ChangeType(typeMap.InheritanceCode, this.Discriminator.Type);
                foreach (object d in inheritanceCodes.Keys)
                {
                    // if the keys are equal, or if they are both strings containing only spaces
                    // they are considered equal
                    if ((keyValue.GetType() == typeof(string) && ((string)keyValue).Trim().Length == 0 &&
                         d.GetType() == typeof(string) && ((string)d).Trim().Length == 0) ||
                        object.Equals(d, keyValue))
                    {
                        throw Error.InheritanceCodeUsedForMultipleTypes(keyValue);
                    }
                }
                if (type.InheritanceCode != null)
                {
                    throw Error.InheritanceTypeHasMultipleDiscriminators(type);
                }
                type.SetInheritanceCode(keyValue);
                this.inheritanceCodes.Add(keyValue, type);
                if (typeMap.IsInheritanceDefault)
                {
                    if (this.inheritanceDefault != null)
                    {
                        throw Error.InheritanceTypeHasMultipleDefaults(type);
                    }
                    this.inheritanceDefault = type;
                }
            }

            // init sub-inherited types
            foreach (TypeMapping tm in typeMap.DerivedTypes)
            {
                this.InitDerivedTypes(tm);
            }

            return(type);
        }
Esempio n. 8
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            public override V GetValue(T instance)
            {
                if (isItem)
                {
                    var value = this.dItemGet(instance, key);
                    if (value == null)
                    {
                        return(default(V));
                    }

                    return((V)DBConvert.ChangeType(value, typeof(V)));
                }

                return(this.dget(instance));
            }
Esempio n. 9
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        public void SetValue(object objEntity, object dbValue)
        {
            if (Convert.IsDBNull(dbValue))
            {
                return;
            }

            if (_PropertyInfo != null)
            {
                _PropertyInfo.SetValue(objEntity, /* Convert.ChangeType */ DBConvert.ChangeType(dbValue, _DataType), null);
            }
            else if (_FieldInfo != null)
            {
                _FieldInfo.SetValue(objEntity, /* Convert.ChangeType */ DBConvert.ChangeType(dbValue, _DataType));
            }
        }
Esempio n. 10
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        protected override object GetParameterValue(IProviderType type, object value)
        {
            if (value == null)
            {
                return(DBNull.Value);
            }

            var type2 = value.GetType();
            var closestRuntimeType = type.GetClosestRuntimeType();

            if (closestRuntimeType == typeof(OracleNumber))
            {
                return(new OracleNumber(Convert.ToDecimal(value)));
            }
            return(closestRuntimeType == type2 ? value : DBConvert.ChangeType(value, closestRuntimeType));
        }
Esempio n. 11
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        public override object GetParameterValue(int parameterIndex)
        {
            if (((parameters == null) || (parameterIndex < 0)) || (parameterIndex > parameters.Count))
            {
                throw Error.ArgumentOutOfRange("parameterIndex");
            }
            if ((session != null) && !session.IsBuffered)
            {
                session.Buffer();
            }
            SqlParameterInfo info = parameters[parameterIndex];
            object           obj2 = command.Parameters[parameterIndex].Value;

            if (obj2 == DBNull.Value)
            {
                obj2 = null;
            }
            if (obj2 != null)
            {
                var objType = obj2.GetType();
                var ns      = objType.Namespace;
                if (ns == "Oracle.DataAccess.Types")
                {
                    if (((INullable)obj2).IsNull)
                    {
                        return(null);
                    }

                    var propertyInfo = objType.GetProperty("Value");
                    if (propertyInfo != null)
                    {
                        obj2 = propertyInfo.GetValue(obj2, null);
                        if (obj2 != null)
                        {
                            objType = obj2.GetType();
                        }
                    }
                }

                if (objType != info.Parameter.ClrType)
                {
                    return(DBConvert.ChangeType(obj2, info.Parameter.ClrType));
                }
            }
            return(obj2);
        }
Esempio n. 12
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 internal static T TryConvert <T>(object dbValue)
 {
     if (dbValue == null || Convert.IsDBNull(dbValue))
     {
         return(default(T));
     }
     else
     {
         try
         {
             return((T)dbValue);
         }
         catch (InvalidCastException)
         {
             return(DBConvert.ChangeType <T>(dbValue));                          //	(T)Convert.ChangeType(dbValue, typeof(T).TryUnderlyingType());
         }
     }
 }
Esempio n. 13
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 private MetaType InitInheritedType(TypeMapping typeMap, MappedType type)
 {
     derivedTypes.Add(type.Type, type);
     if (typeMap.InheritanceCode != null)
     {
         if (Discriminator == null)
         {
             throw Error.NoDiscriminatorFound(type.Name);
         }
         if (type.Type.IsAbstract)
         {
             throw Error.AbstractClassAssignInheritanceDiscriminator(type.Type);
         }
         object objB = DBConvert.ChangeType(typeMap.InheritanceCode, Discriminator.Type);
         foreach (object obj3 in inheritanceCodes.Keys)
         {
             if ((((objB.GetType() == typeof(string)) && (((string)objB).Trim().Length == 0)) && ((obj3.GetType() == typeof(string)) && (((string)obj3).Trim().Length == 0))) || Equals(obj3, objB))
             {
                 throw Error.InheritanceCodeUsedForMultipleTypes(objB);
             }
         }
         if (type.inheritanceCode != null)
         {
             throw Error.InheritanceTypeHasMultipleDiscriminators(type);
         }
         type.inheritanceCode = objB;
         inheritanceCodes.Add(objB, type);
         if (typeMap.IsInheritanceDefault)
         {
             if (inheritanceDefault != null)
             {
                 throw Error.InheritanceTypeHasMultipleDefaults(type);
             }
             inheritanceDefault = type;
         }
     }
     foreach (TypeMapping mapping in typeMap.DerivedTypes)
     {
         InitDerivedTypes(mapping);
     }
     return(type);
 }
Esempio n. 14
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 protected object GetParameterValue(SqlType type, object value)
 {
     if (value == null)
     {
         return(DBNull.Value);
     }
     else
     {
         Type vType = value.GetType();
         Type pType = type.GetClosestRuntimeType();
         if (pType == vType)
         {
             return(value);
         }
         else
         {
             return(DBConvert.ChangeType(value, pType));
         }
     }
 }
Esempio n. 15
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 private void CoerceToFirst(SqlExpression arg1, ref SqlExpression arg2)
 {
     if ((arg1.SqlType != null) && (arg2.SqlType != null))
     {
         if (arg2.NodeType == SqlNodeType.Value)
         {
             var value2 = (SqlValue)arg2;
             arg2 = sql.Value(arg1.ClrType, arg1.SqlType,
                              DBConvert.ChangeType(value2.Value, arg1.ClrType), value2.IsClientSpecified,
                              arg2.SourceExpression);
         }
         else if ((arg2.NodeType == SqlNodeType.ClientParameter) && (arg2.SqlType != arg1.SqlType))
         {
             ((SqlClientParameter)arg2).SetSqlType(arg1.SqlType);
         }
         else
         {
             arg2 = SqlFactory.UnaryConvert(arg1.ClrType, arg1.SqlType, arg2, arg2.SourceExpression);
         }
     }
 }
Esempio n. 16
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            public virtual object GetParameterValue(int parameterIndex)
            {
                if (((parameters == null) || (parameterIndex < 0)) || (parameterIndex > parameters.Count))
                {
                    throw Error.ArgumentOutOfRange("parameterIndex");
                }
                if ((session != null) && !session.IsBuffered)
                {
                    session.Buffer();
                }
                SqlParameterInfo info = parameters[parameterIndex];
                object           obj2 = command.Parameters[parameterIndex].Value;

                if (obj2 == DBNull.Value)
                {
                    obj2 = null;
                }
                if ((obj2 != null) && (obj2.GetType() != info.Parameter.ClrType))
                {
                    return(DBConvert.ChangeType(obj2, info.Parameter.ClrType));
                }
                return(obj2);
            }
Esempio n. 17
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 private void CoerceToFirst(SqlExpression arg1, ref SqlExpression arg2)
 {
     if (arg1.SqlType != null && arg2.SqlType != null)
     {
         if (arg2.NodeType == SqlNodeType.Value)
         {
             SqlValue val = (SqlValue)arg2;
             arg2 = sql.Value(
                 arg1.ClrType, arg1.SqlType,
                 DBConvert.ChangeType(val.Value, arg1.ClrType),
                 val.IsClientSpecified, arg2.SourceExpression
                 );
         }
         else if (arg2.NodeType == SqlNodeType.ClientParameter && arg2.SqlType != arg1.SqlType)
         {
             SqlClientParameter cp = (SqlClientParameter)arg2;
             cp.SetSqlType(arg1.SqlType);
         }
         else
         {
             arg2 = sql.UnaryConvert(arg1.ClrType, arg1.SqlType, arg2, arg2.SourceExpression);
         }
     }
 }
Esempio n. 18
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 private void CoerceBinaryArgs(ref SqlExpression arg1, ref SqlExpression arg2)
 {
     if ((arg1.SqlType != null) && (arg2.SqlType != null))
     {
         if (!arg1.SqlType.IsSameTypeFamily(arg2.SqlType))
         {
             if ((arg1.ClrType != typeof(bool)) && (arg2.ClrType != typeof(bool)))
             {
                 if (arg2.NodeType == SqlNodeType.Value)
                 {
                     var    value2 = (SqlValue)arg2;
                     object obj2   = value2.Value;
                     if (!value2.ClrType.IsAssignableFrom(arg1.ClrType))
                     {
                         obj2 = DBConvert.ChangeType(obj2, arg1.ClrType);
                     }
                     IProviderType sqlType = this.typeProvider.ChangeTypeFamilyTo(arg2.SqlType, arg1.SqlType);
                     arg2 = this.sql.Value(arg1.ClrType, sqlType, obj2, value2.IsClientSpecified,
                                           arg2.SourceExpression);
                 }
                 else if (arg1.NodeType == SqlNodeType.Value)
                 {
                     var    value3 = (SqlValue)arg1;
                     object obj3   = value3.Value;
                     if (!value3.ClrType.IsAssignableFrom(arg2.ClrType))
                     {
                         obj3 = DBConvert.ChangeType(obj3, arg2.ClrType);
                     }
                     IProviderType type2 = this.typeProvider.ChangeTypeFamilyTo(arg1.SqlType, arg2.SqlType);
                     arg1 = this.sql.Value(arg2.ClrType, type2, obj3, value3.IsClientSpecified,
                                           arg1.SourceExpression);
                 }
                 else if ((arg2.NodeType == SqlNodeType.ClientParameter) && (arg2.SqlType != arg1.SqlType))
                 {
                     ((SqlClientParameter)arg2).SetSqlType(arg1.SqlType);
                 }
                 else if ((arg1.NodeType == SqlNodeType.ClientParameter) && (arg1.SqlType != arg2.SqlType))
                 {
                     ((SqlClientParameter)arg1).SetSqlType(arg2.SqlType);
                 }
                 else
                 {
                     int num = arg1.SqlType.ComparePrecedenceTo(arg2.SqlType);
                     if (num > 0)
                     {
                         arg2 = SqlFactory.UnaryConvert(arg1.ClrType, arg1.SqlType, arg2, arg2.SourceExpression);
                     }
                     else if (num < 0)
                     {
                         arg1 = SqlFactory.UnaryConvert(arg2.ClrType, arg2.SqlType, arg1, arg1.SourceExpression);
                     }
                 }
             }
         }
         else if ((arg1.SqlType.HasPrecisionAndScale && arg2.SqlType.HasPrecisionAndScale) &&
                  (arg1.SqlType != arg2.SqlType))
         {
             IProviderType bestType   = this.typeProvider.GetBestType(arg1.SqlType, arg2.SqlType);
             var           expression = arg1 as SqlSimpleTypeExpression;
             if (expression != null)
             {
                 expression.SetSqlType(bestType);
             }
             var expression2 = arg2 as SqlSimpleTypeExpression;
             if (expression2 != null)
             {
                 expression2.SetSqlType(bestType);
             }
         }
     }
 }
Esempio n. 19
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        // Methods
        internal AttributedRootType(AttributedMetaModel model, AttributedMetaTable table, Type type)
            : base(model, table, type, null)
        {
            this.model = model;
            var customAttributes = model.AttributeProvider.GetInheritanceMappingAttribute(type);

            //(InheritanceMappingAttribute[])type.GetCustomAttributes(typeof(InheritanceMappingAttribute), true);
            if (customAttributes != null && customAttributes.Length > 0)
            {
                if (this.Discriminator == null)
                {
                    throw Mapping.Error.NoDiscriminatorFound(type);
                }
                if (!MappingSystem.IsSupportedDiscriminatorType(this.Discriminator.Type))
                {
                    throw Mapping.Error.DiscriminatorClrTypeNotSupported(this.Discriminator.DeclaringType.Name, this.Discriminator.Name, this.Discriminator.Type);
                }
                this.types = new Dictionary <Type, MetaType>();
                this.types.Add(type, this);
                this.codeMap = new Dictionary <object, MetaType>();
                foreach (InheritanceMappingAttribute attribute in customAttributes)
                {
                    if (!type.IsAssignableFrom(attribute.Type))
                    {
                        throw Mapping.Error.InheritanceTypeDoesNotDeriveFromRoot(attribute.Type, type);
                    }
                    if (attribute.Type.IsAbstract)
                    {
                        throw Mapping.Error.AbstractClassAssignInheritanceDiscriminator(attribute.Type);
                    }
                    AttributedMetaType type2 = this.CreateInheritedType(type, attribute.Type);
                    if (attribute.Code == null)
                    {
                        throw Mapping.Error.InheritanceCodeMayNotBeNull();
                    }
                    if (type2.inheritanceCode != null)
                    {
                        throw Mapping.Error.InheritanceTypeHasMultipleDiscriminators(attribute.Type);
                    }
                    object objB = DBConvert.ChangeType(attribute.Code, this.Discriminator.Type);
                    foreach (object obj3 in this.codeMap.Keys)
                    {
                        if ((((objB.GetType() == typeof(string)) && (((string)objB).Trim().Length == 0)) && ((obj3.GetType() == typeof(string)) && (((string)obj3).Trim().Length == 0))) || object.Equals(obj3, objB))
                        {
                            throw Mapping.Error.InheritanceCodeUsedForMultipleTypes(objB);
                        }
                    }
                    type2.inheritanceCode = objB;
                    this.codeMap.Add(objB, type2);
                    if (attribute.IsDefault)
                    {
                        if (this.inheritanceDefault != null)
                        {
                            throw Mapping.Error.InheritanceTypeHasMultipleDefaults(type);
                        }
                        this.inheritanceDefault = type2;
                    }
                }
                if (this.inheritanceDefault == null)
                {
                    throw Mapping.Error.InheritanceHierarchyDoesNotDefineDefault(type);
                }
            }
            if (this.types != null)
            {
                this.inheritanceTypes = this.types.Values.ToList <MetaType>().AsReadOnly();
            }
            else
            {
                this.inheritanceTypes = new MetaType[] { this }.ToList <MetaType>().AsReadOnly();
            }
            this.Validate();
        }
        internal static object ReadValue(this XElement xe, BindableDynamicObject.XmlSettings xmlSettings)
        {
            if ((bool?)xe.Attribute(XnNil) ?? false)
            {
                return(null);
            }

            string declaredType = null;

            switch (xmlSettings.TypeSchema)
            {
            case BindableDynamicObject.XmlSettings.DataTypeSchema.Xsd:
                declaredType = xe.GetXsdTypeAttributeString();
                if (string.IsNullOrEmpty(declaredType))
                {
                    if (xmlSettings.IsImplicit())
                    {
                        declaredType = xe.GetNetTypeAttributeString();
                    }
                }
                else
                {
                    try { return(_XsdDataContractSerializer.ReadObject(xe.CreateReader(), false)); }
                    catch { }
                }
                break;

            case BindableDynamicObject.XmlSettings.DataTypeSchema.Net:
                declaredType = xe.GetNetTypeAttributeString();
                if (declaredType == null && xmlSettings.IsImplicit())
                {
                    declaredType = xe.GetXsdTypeAttributeString();
                }
                break;

            default:
                if (xmlSettings.IsImplicit())
                {
                    declaredType = xe.GetXsdTypeAttributeString();
                    if (string.IsNullOrEmpty(declaredType))
                    {
                        declaredType = xe.GetNetTypeAttributeString();
                    }
                    else
                    {
                        try { return(_XsdDataContractSerializer.ReadObject(xe.CreateReader(), false)); }
                        catch { }
                    }
                }
                break;
            }

            Type valueType = GetXsdType(declaredType);

            if (valueType == typeof(string))
            {
                return(xe.Value);
            }

            try
            {
                return(DBConvert.ChangeType(xe.Value, valueType));
            }
            catch
            {
                return(xe.Value);
            }
        }
Esempio n. 21
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        internal AttributedRootType(AttributedMetaModel model, AttributedMetaTable table, Type type)
            : base(model, table, type, null)
        {
            // check for inheritance and create all other types
            var inheritanceAttributes = GetInheritanceMappingAttributes(type, model);

            if (inheritanceAttributes.Count > 0)
            {
                if (Discriminator == null)
                {
                    throw Error.NoDiscriminatorFound(type);
                }
                if (!MappingSystem.IsSupportedDiscriminatorType(Discriminator.Type))
                {
                    throw Error.DiscriminatorClrTypeNotSupported(
                              Discriminator.DeclaringType.Name,
                              Discriminator.Name,
                              Discriminator.Type);
                }

                types = new Dictionary <Type, MetaType>();
                types.Add(type, this);                 // add self
                var codeMap = new Dictionary <object, MetaType>();

                // initialize inheritance types
                foreach (var inheritanceAttribute in inheritanceAttributes)
                {
                    if (!type.IsAssignableFrom(inheritanceAttribute.Type))
                    {
                        throw Error.InheritanceTypeDoesNotDeriveFromRoot(inheritanceAttribute.Type, type);
                    }
                    if (inheritanceAttribute.Type.IsAbstract)
                    {
                        throw Error.AbstractClassAssignInheritanceDiscriminator(inheritanceAttribute.Type);
                    }

                    var inheritedType = CreateInheritedType(type, inheritanceAttribute.Type);
                    if (inheritanceAttribute.Code == null)
                    {
                        throw Error.InheritanceCodeMayNotBeNull();
                    }
                    if (inheritedType.inheritanceCode != null)
                    {
                        throw Error.InheritanceTypeHasMultipleDiscriminators(inheritanceAttribute.Type);
                    }

                    var codeValue = DBConvert.ChangeType(inheritanceAttribute.Code, Discriminator.Type);
                    foreach (var codeMapKey in codeMap.Keys)
                    {
                        // if the keys are equal, or if they are both strings containing only spaces
                        // they are considered equal
                        if ((codeValue is string &&
                             ((string)codeValue).Trim().Length == 0 &&
                             codeMapKey is string &&
                             ((string)codeMapKey).Trim().Length == 0) ||
                            Equals(codeMapKey, codeValue))
                        {
                            throw Error.InheritanceCodeUsedForMultipleTypes(codeValue);
                        }
                    }
                    inheritedType.inheritanceCode = codeValue;
                    codeMap.Add(codeValue, inheritedType);

                    if (inheritanceAttribute.IsDefault)
                    {
                        if (inheritanceDefault != null)
                        {
                            throw Error.InheritanceTypeHasMultipleDefaults(type);
                        }
                        inheritanceDefault = inheritedType;
                    }
                }

                if (inheritanceDefault == null)
                {
                    throw Error.InheritanceHierarchyDoesNotDefineDefault(type);
                }
            }

            inheritanceTypes = types == null ?
                               new MetaType[]
            {
                this
            }
            .ToList()
            .AsReadOnly() :
            types.Values.ToList().AsReadOnly();

            Validate();
        }
Esempio n. 22
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        internal AttributedRootType(AttributedMetaModel model, AttributedMetaTable table, Type type)
            : base(model, table, type, null)
        {
            // check for inheritance and create all other types
            InheritanceMappingAttribute[] inheritanceInfo = (InheritanceMappingAttribute[])type.GetCustomAttributes(typeof(InheritanceMappingAttribute), true);
            if (inheritanceInfo.Length > 0)
            {
                if (this.Discriminator == null)
                {
                    throw Error.NoDiscriminatorFound(type);
                }
                if (!MappingSystem.IsSupportedDiscriminatorType(this.Discriminator.Type))
                {
                    throw Error.DiscriminatorClrTypeNotSupported(this.Discriminator.DeclaringType.Name, this.Discriminator.Name, this.Discriminator.Type);
                }
                this.types = new Dictionary <Type, MetaType>();
                this.types.Add(type, this);                 // add self
                this.codeMap = new Dictionary <object, MetaType>();

                // initialize inheritance types
                foreach (InheritanceMappingAttribute attr in inheritanceInfo)
                {
                    if (!type.IsAssignableFrom(attr.Type))
                    {
                        throw Error.InheritanceTypeDoesNotDeriveFromRoot(attr.Type, type);
                    }
                    if (attr.Type.IsAbstract)
                    {
                        throw Error.AbstractClassAssignInheritanceDiscriminator(attr.Type);
                    }
                    AttributedMetaType mt = this.CreateInheritedType(type, attr.Type);
                    if (attr.Code == null)
                    {
                        throw Error.InheritanceCodeMayNotBeNull();
                    }
                    if (mt.inheritanceCode != null)
                    {
                        throw Error.InheritanceTypeHasMultipleDiscriminators(attr.Type);
                    }
                    object codeValue = DBConvert.ChangeType(attr.Code, this.Discriminator.Type);
                    foreach (object d in codeMap.Keys)
                    {
                        // if the keys are equal, or if they are both strings containing only spaces
                        // they are considered equal
                        if ((codeValue.GetType() == typeof(string) && ((string)codeValue).Trim().Length == 0 &&
                             d.GetType() == typeof(string) && ((string)d).Trim().Length == 0) ||
                            object.Equals(d, codeValue))
                        {
                            throw Error.InheritanceCodeUsedForMultipleTypes(codeValue);
                        }
                    }
                    mt.inheritanceCode = codeValue;
                    this.codeMap.Add(codeValue, mt);
                    if (attr.IsDefault)
                    {
                        if (this.inheritanceDefault != null)
                        {
                            throw Error.InheritanceTypeHasMultipleDefaults(type);
                        }
                        this.inheritanceDefault = mt;
                    }
                }

                if (this.inheritanceDefault == null)
                {
                    throw Error.InheritanceHierarchyDoesNotDefineDefault(type);
                }
            }

            if (this.types != null)
            {
                this.inheritanceTypes = this.types.Values.ToList().AsReadOnly();
            }
            else
            {
                this.inheritanceTypes = new MetaType[] { this }.ToList().AsReadOnly();
            }
            this.Validate();
        }