/// <summary>
/// Expands the graph expression along the specified property, but returns only the terminal type
/// The new graph expression will bind a given context if and only if both the old expression and the addition bind
/// </summary>
/// <typeparam name="Y">type of query</typeparam>
/// <param name="property">property along which to expand</param>
/// <param name="filterGenerator">a filter generator to restrict results</param>
/// <returns>a TypedQueryableGraph</returns>
public ITypedQueryableGraph Select <Y>(Resource property, IFilterGenerator <Y> filterGenerator = null) where Y : Resource
{
var expansion = Select <Y>(filterGenerator);
var query = Select(property, expansion);
return(new TypedQueryableGraph(GraphProvider, query.GraphExpression, new LabelledTreeNode <Type, Term>(typeof(Y))));
}
/// <summary>
/// Start of a query, returns objects of the specified type
/// </summary>
/// <typeparam name="Y">type of query</typeparam>
/// <param name="filterGenerator">a filter generator to restrict results</param>
/// <returns>a TypedQueryableGraph</returns>
public ITypedQueryableGraph Select <Y>(IFilterGenerator <Y> filterGenerator = null) where Y : Resource
{
var objectGraph = ConvertTypeToGraph(typeof(Y));
var filter = filterGenerator != null?filterGenerator.Generate(objectGraph) : null;
return(new TypedQueryableGraph(GraphProvider, new GraphExpression(objectGraph, filter), new LabelledTreeNode <Type, Term>(typeof(Y))));
}
/// <summary>
/// Expands the graph expression along the specified property.
/// The new graph expression will bind a given context if and only if both the old expression and the addition bind
/// </summary>
/// <typeparam name="Y">type of expansion</typeparam>
/// <param name="property">property along which to expand</param>
/// <param name="filterGenerator">a filter generator to restrict results</param>
/// <returns>a TypedQueryableGraph</returns>
public ITypedQueryableGraph Require <Y>(Resource property, IFilterGenerator <Y> filterGenerator = null) where Y : Resource
{
var expansion = Select <Y>(filterGenerator);
var typeGraph = TypeGraph.Copy().AddChild(property, expansion.TypeGraph);
var query = Require(property, expansion);
return(new TypedQueryableGraph(GraphProvider, query.GraphExpression, typeGraph));
}
/// <summary>
/// Returns a queryable graph
/// </summary>
/// <typeparam name="T"></typeparam>
/// <returns>a TypedQueryableGraph</returns>
public ITypedQueryableGraph Select <T>(IFilterGenerator <T> filterGenerator = null) where T : Resource
{
return((new TypedQueryableGraph(GraphProvider)).Select <T>(filterGenerator));
}
