Source code for pm4py.visualization.ocel.eve_to_obj_types.visualizer

'''
PM4Py – A Process Mining Library for Python
Copyright (C) 2026 Process Intelligence Solutions GmbH

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see this software project's root or
visit <https://www.gnu.org/licenses/>.

Website: https://processintelligence.solutions
Contact: info@processintelligence.solutions
'''
from graphviz import Digraph
from enum import Enum
from pm4py.util import exec_utils
from typing import Optional, Dict, Any
from pm4py.visualization.common import gview
from pm4py.visualization.common import save as gsave
from pm4py.visualization.ocel.eve_to_obj_types.variants import graphviz
from pm4py.objects.ocel.obj import OCEL




class Variants(Enum):
    GRAPHVIZ = graphviz





def apply(
    ocel: OCEL,
    variant=Variants.GRAPHVIZ,
    parameters: Optional[Dict[Any, Any]] = None,
) -> Digraph:
    """
    Shows the relationships between the different event and object types of the
    object-centric event log.

    Minimum viable example:

        import pm4py
        from pm4py.visualization.ocel.eve_to_obj_types import visualizer

        ocel = pm4py.read_ocel('tests/input_data/ocel/example_log.jsonocel')
        gviz = visualizer.apply(ocel)
        visualizer.view(gviz)

    Parameters
    ---------------
    ocel
        Object-centric event log
    parameters
        Variant-specific parameters

    Returns
    --------------
    gviz
        Graphviz object
    """
    return exec_utils.get_variant(variant).apply(ocel, parameters=parameters)





def save(gviz: Digraph, output_file_path: str, parameters=None):
    """
    Save the diagram

    Parameters
    -----------
    gviz
        GraphViz diagram
    output_file_path
        Path where the GraphViz output should be saved
    """
    gsave.save(gviz, output_file_path, parameters=parameters)





def view(gviz: Digraph, parameters=None):
    """
    View the diagram

    Parameters
    -----------
    gviz
        GraphViz diagram
    """
    return gview.view(gviz, parameters=parameters)





def matplotlib_view(gviz: Digraph, parameters=None):
    """
    Views the diagram using Matplotlib

    Parameters
    ---------------
    gviz
        Graphviz
    """

    return gview.matplotlib_view(gviz, parameters=parameters)