Esempio n. 1
0
        void InitializeMetadata(ObjectContext ctx)
        {
            if (fieldDescriptors != null)
            {
                return;
            }
            fieldDescriptors = new Dictionary <string, Dictionary <string, ColumnDesc> >();

            var items = ctx.MetadataWorkspace.GetItems(DataSpace.CSpace);

            Debug.Assert(items != null);
            var tables = items.Where(m => m.BuiltInTypeKind == BuiltInTypeKind.EntityType || m.BuiltInTypeKind == BuiltInTypeKind.ComplexType);

            foreach (StructuralType table in tables)
            {
                var fieldsMap = new Dictionary <string, ColumnDesc>();
                fieldDescriptors[table.Name] = fieldsMap;
                ReadOnlyMetadataCollection <EdmProperty> props = null;
                var complexType = table as ComplexType;
                if (complexType != null)
                {
                    props = complexType.Properties;
                }

                var entityType = table as EntityType;
                if (entityType != null)
                {
                    props = entityType.Properties;
                }
                Debug.Assert(props != null);

                var fields = props.Where(p => p.DeclaringType.Name == table.Name);
                foreach (var field in fields)
                {
                    int  maxLength = 0;
                    byte scale     = 0;

                    if (field.TypeUsage.EdmType.Name == "String")
                    {
                        var value = field.TypeUsage.Facets["MaxLength"].Value;
                        if (value is Int32)
                        {
                            maxLength = Convert.ToInt32(value);
                        }
                        else
                        {
                            // unbounded
                            maxLength = Int32.MaxValue;
                        }
                    }
                    else if (field.TypeUsage.EdmType.Name == "Decimal")
                    {
                        var value = field.TypeUsage.Facets["Scale"].Value;
                        scale = Convert.ToByte(value);
                    }
                    var desc = new ColumnDesc(field.Name, field.Nullable, maxLength, scale);
                    fieldsMap[field.Name] = desc;
                }
            }
        }
        private IEnumerable <DynamicFilterDefinition> FindFiltersForEntitySet(ReadOnlyMetadataCollection <MetadataProperty> metadataProperties, EntityContainer entityContainer)
        {
            var filterList = metadataProperties
                             .Where(mp => mp.Name.Contains("customannotation:" + DynamicFilterConstants.ATTRIBUTE_NAME_PREFIX))
                             .Select(m => m.Value as DynamicFilterDefinition)
                             .ToList();

            //  Note: Prior to the switch to use CSpace (which was done to allow filters on navigation properties),
            //  we had to remove filters that exist in base EntitySets to this entity to fix issues with
            //  Table-per-Type inheritance (issue #32).  In CSpace none of that is necessary since we are working
            //  with the actual c# models now (in CSpace) so we always have the correct filters and access to all
            //  the inherited properties that we need.
            if (filterList.Any())
            {
                //  Recursively remove any filters that exist in base EntitySets to this entity.
                //  This happens when an entity uses Table-per-Type inheritance.  Filters will be added
                //  to all derived EntitySets because of the inheritance in the C# classes.  But the database
                //  representation (the EntitySet) does not give access to inherited propeties since they
                //  only exist in the child EntitySet.  And on queries of entities involved in TPT, the
                //  query will generate a DbScanExpression for each EntitySet - so we only want the filters
                //  applied to the DbScanExpression to which they apply.
                //  See issue #32.
                RemoveFiltersForBaseClass(filterList.First().CLRType, filterList, entityContainer);
            }

            return(filterList);
        }
Esempio n. 3
0
        private void GenerateFieldInfos(DbSetInfo dbSetInfo, string[] keys, EdmProperty[] edmProps)
        {
            short pkNum = 0;

            Array.ForEach(edmProps, (edmProp) =>
            {
                Field fieldInfo = new Field()
                {
                    fieldName = edmProp.Name
                };
                if (keys.Contains(fieldInfo.fieldName))
                {
                    ++pkNum;
                    fieldInfo.isPrimaryKey = pkNum;
                    fieldInfo.isReadOnly   = true;
                }
                bool isComputed           = this.isComputed(edmProp);
                fieldInfo.isAutoGenerated = isAutoGenerated(edmProp);
                fieldInfo.isNullable      = edmProp.Nullable;
                fieldInfo.isReadOnly      = fieldInfo.isAutoGenerated;
                bool isArray    = false;
                string propType = edmProp.TypeUsage.EdmType.Name;
                try
                {
                    fieldInfo.dataType = DataTypeFromType(propType, out isArray);
                    ReadOnlyMetadataCollection <Facet> facets = edmProp.TypeUsage.Facets;
                    Facet maxLenFacet = facets.Where(f => f.Name == "MaxLength").FirstOrDefault();
                    if (maxLenFacet != null)
                    {
                        try
                        {
                            fieldInfo.maxLength = (short)Convert.ChangeType(maxLenFacet.Value, typeof(short));
                        }
                        catch
                        {
                        }
                    }
                    //gess that the property is rowversion
                    fieldInfo.fieldType = (isComputed && fieldInfo.dataType == DataType.Binary) ? FieldType.RowTimeStamp : FieldType.None;
                }
                catch (UnSupportedTypeException)
                {
                    BuiltInTypeKind typeKind = edmProp.TypeUsage.EdmType.BuiltInTypeKind;
                    if (typeKind == BuiltInTypeKind.ComplexType)
                    {
                        fieldInfo.dataType  = DataType.None;
                        fieldInfo.fieldType = FieldType.Object;
                    }
                    else
                    {
                        throw;
                    }
                }

                dbSetInfo.fieldInfos.Add(fieldInfo);
            });
        }
Esempio n. 4
0
        private bool DoPropertiesHaveDefaultNames(ReadOnlyMetadataCollection <EdmProperty> properties, ReadOnlyMetadataCollection <EdmProperty> otherEndProperties)
        {
            if (properties.Count != otherEndProperties.Count)
            {
                return(false);
            }

            return(!properties.Where((t, i) => !t.Name.EndsWith("_" + otherEndProperties[i].Name)).Any());
        }
Esempio n. 5
0
        private bool DoPropertiesHaveDefaultNames(ReadOnlyMetadataCollection <EdmProperty> properties, string roleName, IReadOnlyList <EdmProperty> otherEndProperties)
        {
            if (properties == null)
            {
                throw new ArgumentNullException(nameof(properties));
            }

            if (properties.Count != otherEndProperties.Count)
            {
                return(false);
            }

            return(!properties.Where((t, i) => !t.Name.EndsWith("_" + otherEndProperties[i].Name)).Any());
        }
Esempio n. 6
0
        private IEnumerable <DynamicFilterDefinition> FindFiltersForEntitySet(ReadOnlyMetadataCollection <MetadataProperty> metadataProperties, EntityContainer entityContainer)
        {
            var filterList = metadataProperties
                             .Where(mp => mp.Name.Contains("customannotation:" + DynamicFilterConstants.ATTRIBUTE_NAME_PREFIX))
                             .Select(m => m.Value as DynamicFilterDefinition)
                             .ToList();

            if (filterList.Any())
            {
                //  Recursively remove any filters that exist in base EntitySets to this entity.
                //  This happens when an entity uses Table-per-Type inheritance.  Filters will be added
                //  to all derived EntitySets because of the inheritance in the C# classes.  But the database
                //  representation (the EntitySet) does not give access to inherited propeties since they
                //  only exist in the child EntitySet.  And on queries of entities involved in TPT, the
                //  query will generate a DbScanExpression for each EntitySet - so we only want the filters
                //  applied to the DbScanExpression to which they apply.
                //  See issue #32.
                RemoveFiltersForBaseClass(filterList.First().CLRType, filterList, entityContainer);
            }

            return(filterList);
        }
Esempio n. 7
0
        private IEnumerable<DynamicFilterDefinition> FindFiltersForEntitySet(ReadOnlyMetadataCollection<MetadataProperty> metadataProperties, EntityContainer entityContainer)
        {
            var filterList = metadataProperties
                .Where(mp => mp.Name.Contains("customannotation:" + DynamicFilterConstants.ATTRIBUTE_NAME_PREFIX))
                .Select(m => m.Value as DynamicFilterDefinition)
                .ToList();

            if (filterList.Any())
            {
                //  Recursively remove any filters that exist in base EntitySets to this entity.
                //  This happens when an entity uses Table-per-Type inheritance.  Filters will be added
                //  to all derived EntitySets because of the inheritance in the C# classes.  But the database
                //  representation (the EntitySet) does not give access to inherited propeties since they
                //  only exist in the child EntitySet.  And on queries of entities involved in TPT, the
                //  query will generate a DbScanExpression for each EntitySet - so we only want the filters
                //  applied to the DbScanExpression to which they apply.
                //  See issue #32.
                RemoveFiltersForBaseClass(filterList.First().CLRType, filterList, entityContainer);
            }

            return filterList;
        }
        private IEnumerable<DynamicFilterDefinition> FindFiltersForEntitySet(ReadOnlyMetadataCollection<MetadataProperty> metadataProperties, EntityContainer entityContainer)
        {
            var filterList = metadataProperties
                .Where(mp => mp.Name.Contains("customannotation:" + DynamicFilterConstants.ATTRIBUTE_NAME_PREFIX))
                .Select(m => m.Value as DynamicFilterDefinition)
                .ToList();

            //  Note: Prior to the switch to use CSpace (which was done to allow filters on navigation properties),
            //  we had to remove filters that exist in base EntitySets to this entity to fix issues with 
            //  Table-per-Type inheritance (issue #32).  In CSpace none of that is necessary since we are working
            //  with the actual c# models now (in CSpace) so we always have the correct filters and access to all
            //  the inherited properties that we need.
            if (filterList.Any())
            {
                //  Recursively remove any filters that exist in base EntitySets to this entity.
                //  This happens when an entity uses Table-per-Type inheritance.  Filters will be added
                //  to all derived EntitySets because of the inheritance in the C# classes.  But the database
                //  representation (the EntitySet) does not give access to inherited propeties since they
                //  only exist in the child EntitySet.  And on queries of entities involved in TPT, the
                //  query will generate a DbScanExpression for each EntitySet - so we only want the filters
                //  applied to the DbScanExpression to which they apply.
                //  See issue #32.
                RemoveFiltersForBaseClass(filterList.First().CLRType, filterList, entityContainer);
            }

            return filterList;
        }