Source code for pacman.utilities.json_utils

# Copyright (c) 2017 The University of Manchester
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
Miscellaneous minor functions for converting between JSON and Python objects.
"""

import json
import gzip
from typing import cast, Iterable, List, Union

from spinn_utilities.typing.json import JsonArray, JsonObject

from pacman.data import PacmanDataView
from pacman.model.graphs.machine import SimpleMachineVertex
from pacman.model.placements.placement import Placement
from pacman.model.resources import (
    IPtagResource, ReverseIPtagResource)
from pacman.model.routing_info import BaseKeyAndMask




def json_to_object(json_object: Union[str, JsonObject]) -> JsonObject:
    """
    Makes sure this is a JSON object reading in a file if required

    :param json_object: Either a JSON Object or a string pointing to a file
    :return: a JSON object
    """
    if isinstance(json_object, str):
        if json_object.endswith(".gz"):
            with gzip.open(json_object) as j_file:
                return json.load(j_file)
        else:
            with open(json_object, encoding="utf-8") as j_file:
                return json.load(j_file)
    return json_object





def key_mask_to_json(key_mask: BaseKeyAndMask) -> JsonObject:
    """
    Converts a BaseKeyAndMask into json

    :param  key_mask:
    :returns: key and mask in json format
    """
    try:
        json_object: JsonObject = dict()
        json_object["key"] = key_mask.key
        json_object["mask"] = key_mask.mask
    except Exception as ex:  # pylint: disable=broad-except
        json_object["exception"] = str(ex)
    return json_object





def iptag_resource_to_json(iptag: IPtagResource) -> JsonObject:
    """
    Converts an iptag to json

    :param iptag:
    :returns: iptag in json forMAT
    """
    json_dict: JsonObject = dict()
    try:
        json_dict["ip_address"] = iptag.ip_address
        if iptag.port is not None:
            json_dict["port"] = iptag.port
        json_dict["strip_sdp"] = iptag.strip_sdp
        if iptag.tag is not None:
            json_dict["tag"] = iptag.tag
        json_dict["traffic_identifier"] = iptag.traffic_identifier
    except Exception as ex:  # pylint: disable=broad-except
        json_dict["exception"] = str(ex)
    return json_dict





def iptag_resource_from_json(json_dict: JsonObject) -> IPtagResource:
    """
    Creates an iptag from json

    :param json_dict:
    :returns: The iptag described by the json.
    """
    return IPtagResource(
        cast(str, json_dict["ip_address"]), cast(int, json_dict.get("port")),
        cast(bool, json_dict["strip_sdp"]), cast(int, json_dict.get("tag")),
        cast(str, json_dict["traffic_identifier"]))





def iptag_resources_to_json(iptags: Iterable[IPtagResource]) -> JsonArray:
    """
    Converts a list of iptags to json.

    :param iptags:
    :returns: json description of the iptags
    """
    json_list: JsonArray = []
    for iptag in iptags:
        json_list.append(iptag_resource_to_json(iptag))
    return json_list





def iptag_resources_from_json(
        json_list: List[JsonObject]) -> List[IPtagResource]:
    """
    Creates a list of iptags from json.

    :param json_list:
    :returns: iptags described by the json
    """
    iptags = []
    for json_dict in json_list:
        iptags.append(iptag_resource_from_json(json_dict))
    return iptags





def reverse_iptag_to_json(iptag: ReverseIPtagResource) -> JsonObject:
    """
    Converts a reverse iptag to json

    :param iptag:
    :returns: json description of the reverse iptags
    """
    json_dict: JsonObject = dict()
    try:
        if iptag.port is not None:
            json_dict["port"] = iptag.port
        json_dict["sdp_port"] = iptag.sdp_port
        if iptag.tag is not None:
            json_dict["tag"] = iptag.tag
    except Exception as ex:  # pylint: disable=broad-except
        json_dict["exception"] = str(ex)
    return json_dict





def reverse_iptag_from_json(json_dict: JsonObject) -> ReverseIPtagResource:
    """
    Creates a ReverseIPtagResource based on json

    :param json_dict:
    :returns: reverse iptags described by the json
    """
    port = cast(int, json_dict.get("port"))
    sdp_port = cast(int, json_dict["sdp_port"])
    tag = cast(int, json_dict.get("tag"))
    return ReverseIPtagResource(port, sdp_port, tag)





def reverse_iptags_to_json(
        iptags: Iterable[ReverseIPtagResource]) -> JsonArray:
    """
    Converts a list of reverse iptags to json

    :param iptags:
    :returns: Json representation of the reverse iptags
    """
    json_list: JsonArray = []
    for iptag in iptags:
        json_list.append(reverse_iptag_to_json(iptag))
    return json_list





def reverse_iptags_from_json(
        json_list: List[JsonObject]) -> List[ReverseIPtagResource]:
    """
    Creates a list of ReverseIPtagResource from json

    :param json_list:
    :returns: reverse iptags described by the json
    """
    iptags = []
    for json_dict in json_list:
        iptags.append(reverse_iptag_from_json(json_dict))
    return iptags





def placement_to_json(placement: Placement) -> JsonObject:
    """
    Converts a Placement to json

    :param placement:
    :returns: json object describing the placement
    """
    json_dict: JsonObject = dict()
    try:
        json_dict["vertex_label"] = placement.vertex.label
        json_dict["x"] = placement.x
        json_dict["y"] = placement.y
        json_dict["p"] = placement.p
    except Exception as ex:  # pylint: disable=broad-except
        json_dict["exception"] = str(ex)
    return json_dict





def placements_to_json() -> JsonArray:
    """
    :returns: A json description of the placements (held in DataView)
    """
    json_list: JsonArray = []
    for placement in PacmanDataView.iterate_placemements():
        json_list.append(placement_to_json(placement))
    return json_list





def placement_from_json(json_dict: JsonObject) -> Placement:
    """
    :param json_dict:
    :returns: a Placement based on the json.
    """
    vertex = SimpleMachineVertex(None, cast(str, json_dict["vertex_label"]))
    # The cast(int tells mypy to assume the value can be converted to an int
    return Placement(
        vertex, int(cast(int, json_dict["x"])),
        int(cast(int, json_dict["y"])), int(cast(int, json_dict["p"])))