/// <summary>
/// Apply $top and $skip parameters to query.
/// </summary>
/// <typeparam name="T">The type param</typeparam>
/// <param name="query">The OData aware query.</param>
/// <param name="topText">$top parameter value</param>
/// <param name="skipText">$skip parameter value</param>
/// <param name="entitySetName">The entity set name.</param>
/// <returns>The <see cref="ODataQuery{T}"/> query with applied $top and $skip parameters.</returns>
public static ODataQuery <T> TopSkip <T>(this ODataQuery <T> query, string topText = null, string skipText = null, string entitySetName = null)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
ODataSettings settings = query.ServiceProvider.GetRequiredService <ODataSettings>();
Dictionary <string, string> dictionary = new Dictionary <string, string>();
if (topText != null)
{
dictionary.Add("$top", topText);
}
if (skipText != null)
{
dictionary.Add("$skip", skipText);
}
ODataQueryOptionParser queryOptionParser = GetParser(
query,
entitySetName,
dictionary);
long?skip = queryOptionParser.ParseSkip();
long?top = queryOptionParser.ParseTop();
if (skip.HasValue || top.HasValue || settings.QuerySettings.PageSize.HasValue)
{
IQueryable <T> result = TopSkipHelper.ApplySkipWithValidation(query, skip, settings);
if (top.HasValue)
{
result = TopSkipHelper.ApplyTopWithValidation(result, top, settings);
}
else
{
result = TopSkipHelper.ApplyTopWithValidation(result, settings.QuerySettings.PageSize, settings);
}
return(new ODataQuery <T>(result, query.ServiceProvider));
}
return(query);
}
public static ODataQueryOptionParser GetParser <T>(ODataQuery <T> query, string entitySetName, IDictionary <string, string> raws)
{
IEdmModel edmModel = query.EdmModel;
if (entitySetName == null)
{
entitySetName = typeof(T).Name;
}
IEdmEntityContainer[] containers =
edmModel.SchemaElements.Where(
e => e.SchemaElementKind == EdmSchemaElementKind.EntityContainer &&
(e as IEdmEntityContainer).FindEntitySet(entitySetName) != null)
.OfType <IEdmEntityContainer>()
.ToArray();
if (containers.Length == 0)
{
throw new ArgumentException($"Unable to find {entitySetName} entity set in the model.",
nameof(entitySetName));
}
if (containers.Length > 1)
{
throw new ArgumentException($"Entity Set {entitySetName} found more that 1 time",
nameof(entitySetName));
}
IEdmEntitySet entitySet = containers.Single().FindEntitySet(entitySetName);
if (entitySet == null)
{
}
ODataPath path = new ODataPath(new EntitySetSegment(entitySet));
ODataQueryOptionParser parser = new ODataQueryOptionParser(edmModel, path, raws, query.ServiceProvider);
ODataSettings settings = query.ServiceProvider.GetRequiredService <ODataSettings>();
// Workaround for strange behavior in QueryOptionsParserConfiguration constructor which set it to false always
parser.Resolver.EnableCaseInsensitive = settings.EnableCaseInsensitive;
return(parser);
}
/// <summary>
/// Enable applying OData specific functions to query
/// </summary>
/// <param name="query">
/// The query.
/// </param>
/// <param name="configuration">
/// The configuration action.
/// </param>
/// <param name="edmModel">
/// The edm model.
/// </param>
/// <typeparam name="T">
/// The query type param
/// </typeparam>
/// <returns>
/// The OData aware <see cref="ODataQuery{T}"/> query.
/// </returns>
public static ODataQuery <T> OData <T>(this IQueryable <T> query, Action <ODataSettings> configuration = null, IEdmModel edmModel = null)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (edmModel == null)
{
ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
builder.AddEntityType(typeof(T));
builder.AddEntitySet(typeof(T).Name, new EntityTypeConfiguration(new ODataModelBuilder(), typeof(T)));
edmModel = builder.GetEdmModel();
}
else
{
if (edmModel.SchemaElements.Count(e => e.SchemaElementKind == EdmSchemaElementKind.EntityContainer) == 0)
{
throw new ArgumentException("Provided Entity Model have no IEdmEntityContainer", nameof(edmModel));
}
}
ODataSettings settings = new ODataSettings();
configuration?.Invoke(settings);
ServiceContainer container = new ServiceContainer();
container.AddService(typeof(IEdmModel), edmModel);
container.AddService(typeof(ODataQuerySettings), settings.QuerySettings);
container.AddService(typeof(ODataUriParserSettings), settings.ParserSettings);
container.AddService(typeof(IAssembliesResolver), new DefaultAssembliesResolver());
container.AddService(typeof(FilterBinder), new FilterBinder(container));
container.AddService(typeof(ODataUriResolver), settings.Resolver ?? ODataSettings.DefaultResolver);
container.AddService(typeof(ODataSimplifiedOptions), SimplifiedOptions);
container.AddService(typeof(ODataSettings), settings);
container.AddService(typeof(DefaultQuerySettings), settings.DefaultQuerySettings);
container.AddService(typeof(SelectExpandQueryValidator), new SelectExpandQueryValidator(settings.DefaultQuerySettings));
ODataQuery <T> dataQuery = new ODataQuery <T>(query, container);
return(dataQuery);
}
/// <summary>
/// Apply $filter parameter to query.
/// </summary>
/// <param name="query">
/// The OData aware query.
/// </param>
/// <param name="filterText">
/// The $filter parameter text.
/// </param>
/// <param name="entitySetName">
/// The entity set name.
/// </param>
/// <typeparam name="T">
/// The query type param
/// </typeparam>
/// <returns>
/// The <see cref="ODataQuery{T}"/> query with applied filter parameter.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Argument Null Exception
/// </exception>
public static ODataQuery <T> Filter <T>(this ODataQuery <T> query, string filterText, string entitySetName = null)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (filterText == null)
{
throw new ArgumentNullException(nameof(filterText));
}
IEdmModel edmModel = query.EdmModel;
ODataQueryOptionParser queryOptionParser = GetParser(
query,
entitySetName,
new Dictionary <string, string> {
{ "$filter", filterText }
});
ODataSettings settings = query.ServiceProvider.GetRequiredService <ODataSettings>();
FilterClause filterClause = queryOptionParser.ParseFilter();
SingleValueNode filterExpression = filterClause.Expression.Accept(
new ParameterAliasNodeTranslator(queryOptionParser.ParameterAliasNodes)) as SingleValueNode;
filterExpression = filterExpression ?? new ConstantNode(null);
filterClause = new FilterClause(filterExpression, filterClause.RangeVariable);
Contract.Assert(filterClause != null);
var validator = new FilterQueryValidator(settings.DefaultQuerySettings);
validator.Validate(filterClause, settings.ValidationSettings, edmModel);
Expression filter = FilterBinder.Bind(query, filterClause, typeof(T), query.ServiceProvider);
var result = ExpressionHelpers.Where(query, filter, typeof(T));
return(new ODataQuery <T>(result, query.ServiceProvider));
}
/// <summary>
/// Apply $orderby parameter to query.
/// </summary>
/// <param name="query">
/// The OData aware query.
/// </param>
/// <param name="orderbyText">
/// The $orderby parameter text.
/// </param>
/// <param name="entitySetName">
/// The entity set name.
/// </param>
/// <typeparam name="T">
/// The query type param
/// </typeparam>
/// <returns>
/// The <see cref="ODataQuery{T}"/> query with applied order by parameter.
/// </returns>
/// <exception cref="ArgumentNullException">
/// Argument Null Exception
/// </exception>
public static ODataQueryOrdered <T> OrderBy <T>(this ODataQuery <T> query, string orderbyText, string entitySetName = null)
{
if (query == null)
{
throw new ArgumentNullException(nameof(query));
}
if (orderbyText == null)
{
throw new ArgumentNullException(nameof(orderbyText));
}
IEdmModel edmModel = query.EdmModel;
ODataQueryOptionParser queryOptionParser = GetParser(
query,
entitySetName,
new Dictionary <string, string> {
{ "$orderby", orderbyText }
});
ODataSettings settings = query.ServiceProvider.GetRequiredService <ODataSettings>();
var orderByClause = queryOptionParser.ParseOrderBy();
orderByClause = TranslateParameterAlias(orderByClause, queryOptionParser);
ICollection <OrderByNode> nodes = OrderByNode.CreateCollection(orderByClause);
var validator = new OrderByQueryValidator(settings.DefaultQuerySettings);
validator.Validate(nodes, settings.ValidationSettings, edmModel);
IOrderedQueryable <T> result = (IOrderedQueryable <T>)OrderByBinder.OrderApplyToCore(query, settings.QuerySettings, nodes, edmModel);
return(new ODataQueryOrdered <T>(result, query.ServiceProvider));
}
