/// <summary>
/// Applies the $select and $expand query options to the given entity using the given <see cref="ODataQuerySettings"/>.
/// </summary>
/// <param name="entity">The original entity.</param>
/// <param name="settings">The <see cref="ODataQuerySettings"/> that contains all the query application related settings.</param>
/// <returns>The new entity after the $select and $expand query has been applied to.</returns>
public object ApplyTo(object entity, ODataQuerySettings settings)
{
if (entity == null)
{
throw Error.ArgumentNull(nameof(entity));
}
if (settings == null)
{
throw Error.ArgumentNull(nameof(settings));
}
if (Context.ElementClrType == null)
{
throw Error.NotSupported(SRResources.ApplyToOnUntypedQueryOption, "ApplyTo");
}
ISelectExpandBinder binder = Context.GetSelectExpandBinder();
QueryBinderContext binderContext = new QueryBinderContext(Context.Model, settings, Context.ElementClrType)
{
NavigationSource = Context.NavigationSource,
};
if (Compute != null)
{
binderContext.AddComputedProperties(Compute.ComputeClause.ComputedItems);
}
return(binder.ApplyBind(entity, _selectExpandClause, binderContext));
}
/// <summary>
/// Translate an OData $select or $expand parse tree represented by <see cref="SelectExpandClause"/> to
/// an <see cref="Expression"/> and applies it to an <see cref="object"/>.
/// </summary>
/// <param name="binder">The built in <see cref="ISelectExpandBinder"/></param>
/// <param name="source">The original <see cref="object"/>.</param>
/// <param name="selectExpandClause">The OData $select or $expand parse tree.</param>
/// <param name="context">An instance of the <see cref="QueryBinderContext"/>.</param>
/// <returns></returns>
public static object ApplyBind(this ISelectExpandBinder binder, object source, SelectExpandClause selectExpandClause, QueryBinderContext context)
{
if (binder == null)
{
throw Error.ArgumentNull(nameof(binder));
}
if (source == null)
{
throw Error.ArgumentNull(nameof(source));
}
if (selectExpandClause == null)
{
throw Error.ArgumentNull(nameof(selectExpandClause));
}
if (context == null)
{
throw Error.ArgumentNull(nameof(context));
}
LambdaExpression projectionLambda = binder.BindSelectExpand(selectExpandClause, context) as LambdaExpression;
return(projectionLambda.Compile().DynamicInvoke(source));
}
/// <summary>
/// Translate an OData $select or $expand parse tree represented by <see cref="SelectExpandClause"/> to
/// an <see cref="Expression"/> and applies it to an <see cref="IQueryable"/>. ALso <see cref="IQueryable"/>
/// </summary>
/// <param name="binder">The built in <see cref="ISelectExpandBinder"/></param>
/// <param name="source">The original <see cref="IQueryable"/>.</param>
/// <param name="selectExpandClause">The OData $select or $expand parse tree.</param>
/// <param name="context">An instance of the <see cref="QueryBinderContext"/>.</param>
/// <returns></returns>
public static IQueryable ApplyBind(this ISelectExpandBinder binder, IQueryable source, SelectExpandClause selectExpandClause, QueryBinderContext context)
{
if (binder == null)
{
throw Error.ArgumentNull(nameof(binder));
}
if (source == null)
{
throw Error.ArgumentNull(nameof(source));
}
if (selectExpandClause == null)
{
throw Error.ArgumentNull(nameof(selectExpandClause));
}
if (context == null)
{
throw Error.ArgumentNull(nameof(context));
}
Type elementType = context.ElementClrType;
LambdaExpression projectionLambda = binder.BindSelectExpand(selectExpandClause, context) as LambdaExpression;
MethodInfo selectMethod = ExpressionHelperMethods.QueryableSelectGeneric.MakeGenericMethod(elementType, projectionLambda.Body.Type);
return(selectMethod.Invoke(null, new object[] { source, projectionLambda }) as IQueryable);
}
/// <summary>
/// Gets the <see cref="ISelectExpandBinder"/>.
/// </summary>
/// <param name="context">The query context.</param>
/// <returns>The built <see cref="ISelectExpandBinder"/>.</returns>
public static ISelectExpandBinder GetSelectExpandBinder(this ODataQueryContext context)
{
if (context == null)
{
throw Error.ArgumentNull(nameof(context));
}
ISelectExpandBinder binder = context.RequestContainer?.GetService <ISelectExpandBinder>();
return(binder ?? new SelectExpandBinder(context.GetFilterBinder(), context.GetOrderByBinder()));
}
