/// <summary>
/// Given a data source column name, returns the corresponding Entity-SQL. If
/// we are using the wrapper, we defer to the property descriptor to get
/// the string. If there is no wrapper (or no corresponding property descriptor)
/// we use the column name directly.
/// </summary>
/// <param name="columnName">Column name for which we produce a value expression.</param>
/// <returns>Entity-SQL for column.</returns>
internal static string GetEntitySqlValueForColumnName(string columnName, EntityDataSourceWrapperCollection wrapperCollection)
{
Debug.Assert(!String.IsNullOrEmpty(columnName), "columnName must be given");
string result = null;
if (wrapperCollection != null)
{
// use wrapper definition if it is available
EntityDataSourceWrapperPropertyDescriptor descriptor =
wrapperCollection.GetItemProperties(null).Find(columnName, false) as EntityDataSourceWrapperPropertyDescriptor;
if (null != descriptor)
{
result = descriptor.Column.GetEntitySqlValue();
}
}
// if descriptor does not provide SQL, create the default: it._columnName_
if (null == result)
{
result = EntitySqlElementAlias + "." + QuoteEntitySqlIdentifier(columnName);
}
return(result);
}
internal EntityDataSourceWrapperPropertyDescriptor(EntityDataSourceWrapperCollection collection, EntityDataSourceColumn column)
: base(EntityDataSourceUtil.CheckArgumentNull(column, "column").DisplayName, new Attribute[] { })
{
EntityDataSourceUtil.CheckArgumentNull(collection, "collection");
_collection = collection;
_column = column;
}
internal EntityDataSourceWrapperPropertyDescriptor(EntityDataSourceWrapperCollection collection, EntityDataSourceColumn column)
: base(EntityDataSourceUtil.CheckArgumentNull(column, "column").DisplayName, new Attribute[] { })
{
EntityDataSourceUtil.CheckArgumentNull(collection, "collection");
_collection = collection;
_column = column;
}
internal EntityDataSourceWrapper(EntityDataSourceWrapperCollection collection, object trackedEntity)
{
EntityDataSourceUtil.CheckArgumentNull(collection, "collection");
EntityDataSourceUtil.CheckArgumentNull(trackedEntity, "trackedEntity");
this._collection = collection;
// retrieve state entry
if (!this._collection.Context.ObjectStateManager.TryGetObjectStateEntry(trackedEntity, out _stateEntry))
{
throw new ArgumentException(Strings.ComponentNotFromProperCollection, "trackedEntity");
}
}
internal EntityDataSourceWrapper(EntityDataSourceWrapperCollection collection, object trackedEntity)
{
EntityDataSourceUtil.CheckArgumentNull(collection, "collection");
EntityDataSourceUtil.CheckArgumentNull(trackedEntity, "trackedEntity");
this._collection = collection;
// retrieve state entry
if (!this._collection.Context.ObjectStateManager.TryGetObjectStateEntry(trackedEntity, out _stateEntry))
{
throw new ArgumentException(Strings.ComponentNotFromProperCollection, "trackedEntity");
}
}
internal OrderByBuilder(string argsSortExpression,
EntityDataSourceWrapperCollection wrapperCollection,
string orderBy,
bool autoGenerateOrderByClause,
ParameterCollection orderByParameters,
bool generateDefaultOrderByClause,
EntityDataSource owner)
{
_argsSortExpression = argsSortExpression;
_wrapperCollection = wrapperCollection;
_orderBy = orderBy;
_autoGenerateOrderByClause = autoGenerateOrderByClause;
_orderByParameters = orderByParameters;
_owner = owner;
_generateDefaultOrderByClause = generateDefaultOrderByClause;
}
/// <summary>
/// Indicates whether the given property name exists on the result.
/// The result could be indicated by a wrapperCollection, an entitySet or a typeUsage,
/// any of which could be null.
/// </summary>
/// <param name="propertyName"></param>
/// <param name="wrapperCollection"></param>
/// <param name="entitySet"></param>
/// <param name="tu"></param>
/// <returns></returns>
internal static bool PropertyIsOnEntity(string propertyName, EntityDataSourceWrapperCollection wrapperCollection, EntitySet entitySet, TypeUsage tu)
{
bool propertyIsOnEntity = false;
if (null != wrapperCollection)
{
// check for descriptor
if (null != wrapperCollection.GetItemProperties(null).Find(propertyName, /*ignoreCase*/ false))
{
propertyIsOnEntity = true;
}
}
if (null != tu)
{
ReadOnlyMetadataCollection <EdmMember> members = null;
switch (tu.EdmType.BuiltInTypeKind)
{
case BuiltInTypeKind.RowType:
members = ((RowType)(tu.EdmType)).Members;
break;
case BuiltInTypeKind.EntityType:
members = ((EntityType)(tu.EdmType)).Members;
break;
}
if (null != members && members.Contains(propertyName))
{
propertyIsOnEntity = true;
}
}
if (null != entitySet)
{
if (((EntityType)(entitySet.ElementType)).Members.Contains(propertyName))
{
propertyIsOnEntity = true;
}
}
return(propertyIsOnEntity);
}
internal EntityDataSourceViewSchema(EntityDataSourceWrapperCollection wrappers)
{
DataColumn column;
List<DataColumn> keys = new List<DataColumn>();
PropertyDescriptorCollection properties = wrappers.GetItemProperties(null);
MetadataWorkspace workspace = wrappers.Context.MetadataWorkspace;
foreach (EntityDataSourceWrapperPropertyDescriptor property in properties)
{
Type propertyType = property.PropertyType;
column = ConstructColumn(property);
column.AllowDBNull = property.Column.IsNullable;
EntityDataSourcePropertyColumn propertyColumn = property.Column as EntityDataSourcePropertyColumn;
if (null!= propertyColumn && propertyColumn.IsKey)
{
keys.Add(column);
}
Columns.Add(column);
}
this.PrimaryKey = keys.ToArray();
}
internal EntityDataSourceViewSchema(EntityDataSourceWrapperCollection wrappers)
{
DataColumn column;
List <DataColumn> keys = new List <DataColumn>();
PropertyDescriptorCollection properties = wrappers.GetItemProperties(null);
MetadataWorkspace workspace = wrappers.Context.MetadataWorkspace;
foreach (EntityDataSourceWrapperPropertyDescriptor property in properties)
{
Type propertyType = property.PropertyType;
column = ConstructColumn(property);
column.AllowDBNull = property.Column.IsNullable;
EntityDataSourcePropertyColumn propertyColumn = property.Column as EntityDataSourcePropertyColumn;
if (null != propertyColumn && propertyColumn.IsKey)
{
keys.Add(column);
}
Columns.Add(column);
}
this.PrimaryKey = keys.ToArray();
}
