#
# * `"nodes"`: An array with all nodes. Each node is an object with the
# following properties:
-# * `"labels"`: An array of all applied labels.
-# * `"properties"`: An object mapping each defined property to its value.
+# * `"labels"`: An array of all applied labels.
+# * `"properties"`: An object mapping each defined property to its value.
# * `"edges"`: An array with all relationships. Each relationship is an object
# with the following properties:
-# * `"type"`: The type (`String`) of the relationship.
-# * `"properties"`: An object mapping each defined property to its value.
-# * `"from"`: The local ID of the source node.
-# * `"to"`: The local ID of the destination node.
+# * `"type"`: The type (`String`) of the relationship.
+# * `"properties"`: An object mapping each defined property to its value.
+# * `"from"`: The local ID of the source node.
+# * `"to"`: The local ID of the destination node.
#
# ~~~nit
# import neo4j::graph::sequential_id
# a.labels.add "Foo"
# a["answer"] = 42
# a["Ultimate question of"] = new JsonArray.from(["life",
-# "the Universe", "and Everything."])
+# "the Universe", "and Everything."])
# graph.nodes.register a
# var b = graph.create_node
# b.labels.add "Foo"
end
redef class NeoGraph
- super Jsonable
+ super Serializable
# Retrieve the graph from the specified JSON document.
#
# a.labels.add "Foo"
# a["answer"] = 42
# a["Ultimate question of"] = new JsonArray.from(["life",
- # "the Universe", "and Everything."])
+ # "the Universe", "and Everything."])
# graph.nodes.register a
# var b = graph.create_node
# b.labels.add "Foo"
# graph.edges.add new NeoEdge(a, "BAZ", b)
#
# graph = new NeoGraph.from_json(
- # new SequentialNodeCollection("node_id"), graph.to_json)
+ # new SequentialNodeCollection("node_id"), graph.to_json)
# assert 1 == graph.edges.length
# for edge in graph.edges do
# assert "BAZ" == edge.rel_type
var rel_type = json_edge["type"].as(String)
var json_properties = json_edge["properties"].as(JsonObject)
var edge = new NeoEdge(from, rel_type, to)
- edge.properties.recover_with(json_properties)
+ edge.properties.add_all(json_properties)
edges.add edge
end
end
- redef fun to_json do return to_json_by_append
-
- # Append the JSON representation of `self` to the specified buffer.
- #
- # For a description of the format, see `JsonGraphStore`.
- #
- # SEE: `to_json`
- redef fun append_json(b) do
- b.append "\{\"nodes\":["
- append_entities_json(nodes, b)
- b.append "],\"edges\":["
- append_entities_json(edges, b)
- b.append "]\}"
+ redef fun accept_json_serializer(v) do
+ v.stream.write "\{\"nodes\":["
+ append_entities_json(nodes, v)
+ v.stream.write "],\"edges\":["
+ append_entities_json(edges, v)
+ v.stream.write "]\}"
end
# Encode `self` in JSON.
#
# For a description of the format, see `JsonGraphStore`.
- #
- # SEE: `append_json`
- private fun append_entities_json(entities: Collection[NeoEntity],
- b: Buffer) do
+ private fun append_entities_json(entities: Collection[NeoEntity], v: JsonSerializer) do
var i = entities.iterator
if i.is_ok then
- i.item.append_json_for(self, b)
+ i.item.append_json_for(self, v)
i.next
for entity in i do
- b.add ','
- entity.append_json_for(self, b)
+ v.stream.write ","
+ entity.append_json_for(self, v)
end
end
end
redef class NeoNodeCollection
# Convert the specified JSON value into a local ID.
- fun id_from_jsonable(id: nullable Jsonable): ID_TYPE do return id.as(ID_TYPE)
+ fun id_from_jsonable(id: nullable Serializable): ID_TYPE do return id.as(ID_TYPE)
end
redef class NeoEntity
# Append the JSON representation of the entity to the specified buffer.
- fun append_json_for(graph: NeoGraph, buffer: Buffer) is abstract
+ fun append_json_for(graph: NeoGraph, v: JsonSerializer) is abstract
end
-# Make `NeoNode` `Jsonable`.
+# Make `NeoNode` `Serializable`.
redef class NeoNode
- super Jsonable
+ super Serializable
# Retrieve the node from the specified JSON value.
#
#
# var node = new NeoNode.from_json("""
# {
- # "labels": ["foo", "Bar"],
- # "properties": {
- # "baz": 42
- # }
+ # "labels": ["foo", "Bar"],
+ # "properties": {
+ # "baz": 42
+ # }
# }
# """)
# assert ["foo", "Bar"] == node.labels
var labels = o["labels"].as(JsonArray)
for lab in labels do self.labels.add(lab.as(String))
var json_properties = o["properties"].as(JsonObject)
- properties.recover_with(json_properties)
+ properties.add_all(json_properties)
end
- redef fun to_json do return to_json_by_append
-
- # Append the JSON representation of the node to the specified buffer.
- #
- # SEE: `JsonGraph`
- redef fun append_json(b) do
- b.append "\{\"labels\":["
+ redef fun accept_json_serializer(v) do
+ v.stream.write "\{\"labels\":["
var i = labels.iterator
if i.is_ok then
- i.item.append_json(b)
+ i.item.serialize_to v
i.next
for lab in i do
- b.add ','
- lab.append_json(b)
+ v.stream.write ","
+ lab.serialize_to v
end
end
- b.append "],\"properties\":"
- properties.append_json(b)
- b.add '}'
+ v.stream.write "],\"properties\":"
+ properties.serialize_to v
+ v.stream.write "}"
end
redef fun to_s do return to_json
# Append the JSON representation of the node to the specified buffer.
- redef fun append_json_for(graph, buffer) do
- append_json(buffer)
+ redef fun append_json_for(graph, v) do
+ accept_json_serializer v
end
end
# Append the JSON representation of the relationship to the specified buffer.
#
# Use the IDs specfied by `graph.nodes`.
- redef fun append_json_for(graph, buffer) do
- buffer.append "\{\"type\":"
- rel_type.append_json(buffer)
- buffer.append ",\"properties\":"
- properties.append_json(buffer)
- buffer.append ",\"from\":"
- graph.nodes.id_of(from).append_json(buffer)
- buffer.append ",\"to\":"
- graph.nodes.id_of(to).append_json(buffer)
- buffer.append "}"
+ redef fun append_json_for(graph, v) do
+ v.stream.write "\{\"type\":"
+ rel_type.as(not null).serialize_to(v)
+ v.stream.write ",\"properties\":"
+ properties.serialize_to(v)
+ v.stream.write ",\"from\":"
+ graph.nodes.id_of(from).serialize_to(v)
+ v.stream.write ",\"to\":"
+ graph.nodes.id_of(to).serialize_to(v)
+ v.stream.write "}"
end
end
nitlanguage / nit.git / blobdiff