Struct FileSystemAdapter

#[non_exhaustive]
pub struct FileSystemAdapter {}

Implementations

impl FileSystemAdapter

pub const SCHEMA_TEXT: &'static str = "schema {\r\n query: RootSchemaQuery\r\n}\r\ndirective @filter(\r\n \"\"\"\r\n Name of the filter operation to perform.\r\n \"\"\"\r\n op: String!\r\n \"\"\"\r\n List of string operands for the operator.\r\n \"\"\"\r\n value: [String!]\r\n) repeatable on FIELD | INLINE_FRAGMENT\r\ndirective @tag(\r\n \"\"\"\r\n Name to apply to the given property field.\r\n \"\"\"\r\n name: String\r\n) on FIELD\r\ndirective @output(\r\n \"\"\"\r\n What to designate the output field generated from this property field.\r\n \"\"\"\r\n name: String\r\n) on FIELD\r\ndirective @optional on FIELD\r\ndirective @recurse(\r\n \"\"\"\r\n Recurse up to this many times on this edge. A depth of 1 produces the current\r\n vertex and its immediate neighbors along the given edge.\r\n \"\"\"\r\n depth: Int!\r\n) on FIELD\r\ndirective @fold on FIELD\r\ndirective @transform(\r\n \"\"\"\r\n Name of the transformation operation to perform.\r\n \"\"\"\r\n op: String!\r\n) on FIELD\r\n\r\ntype RootSchemaQuery {\r\n Path(path: String!): Path!\r\n}\r\n\r\ninterface Path {\r\n path: String!\r\n\r\n}\r\n\r\ntype Folder implements Path {\r\n path: String!\r\n children: [Path!]\r\n}\r\n\r\ninterface File implements Path {\r\n path: String!\r\n size: Int!\r\n extension: String!\r\n Hash: String!\r\n}\r\n"

pub fn schema() -> &'static Schema

pub fn new() -> Self

Trait Implementations

impl<'a> Adapter<'a> for FileSystemAdapter

type Vertex = Vertex

The type of vertices in the dataset this adapter queries. Unless your intended vertex type is cheap to clone, consider wrapping it an Rc or Arc to make cloning it cheaper since that’s a fairly common operation when queries are evaluated.

fn resolve_starting_vertices( &self, edge_name: &Arc<str>, parameters: &EdgeParameters, resolve_info: &ResolveInfo, ) -> VertexIterator<'a, Self::Vertex>

Produce an iterator of vertices for the specified starting edge.

fn resolve_property<V: AsVertex<Self::Vertex> + 'a>( &self, contexts: ContextIterator<'a, V>, type_name: &Arc<str>, property_name: &Arc<str>, resolve_info: &ResolveInfo, ) -> ContextOutcomeIterator<'a, V, FieldValue>

Resolve a property required by the query that’s being evaluated.

fn resolve_neighbors<V: AsVertex<Self::Vertex> + 'a>( &self, contexts: ContextIterator<'a, V>, type_name: &Arc<str>, edge_name: &Arc<str>, parameters: &EdgeParameters, resolve_info: &ResolveEdgeInfo, ) -> ContextOutcomeIterator<'a, V, VertexIterator<'a, Self::Vertex>>

Resolve the neighboring vertices across an edge.

fn resolve_coercion<V: AsVertex<Self::Vertex> + 'a>( &self, contexts: ContextIterator<'a, V>, _type_name: &Arc<str>, coerce_to_type: &Arc<str>, _resolve_info: &ResolveInfo, ) -> ContextOutcomeIterator<'a, V, bool>

Attempt to coerce vertices to a subtype, as required by the query that’s being evaluated.

impl Debug for FileSystemAdapter

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FileSystemAdapter

fn default() -> Self

Returns the “default value” for a type.