ODX Data Management Across Programs

"""ODX base library: shared DOPs and services across ECUs."""
from pathlib import Path
import xml.etree.ElementTree as ET

class OdxBaseLibrary:
    """Manages shared ODX elements: DOPs, units, common services."""

    def __init__(self, library_path: str):
        self.library_path = Path(library_path)
        self.dops = {}
        self.units = {}
        self._load()

    def _load(self):
        for odx_file in self.library_path.glob("*.odx"):
            tree = ET.parse(odx_file)
            for dop in tree.iter("DATA-OBJECT-PROP"):
                name = dop.findtext("SHORT-NAME", "")
                self.dops[name] = dop
            for unit in tree.iter("UNIT"):
                name = unit.findtext("SHORT-NAME", "")
                self.units[name] = unit

    def get_dop(self, name: str):
        return self.dops.get(name)

    def check_dop_conflicts(self, odx_file: str) -> list:
        """Check if local DOP definitions conflict with library."""
        tree = ET.parse(odx_file)
        conflicts = []
        for dop in tree.iter("DATA-OBJECT-PROP"):
            name = dop.findtext("SHORT-NAME","")
            if name in self.dops:
                lib_dop = self.dops[name]
                # Compare BIT-LENGTH
                local_bl = dop.findtext(".//BIT-LENGTH","")
                lib_bl   = lib_dop.findtext(".//BIT-LENGTH","")
                if local_bl != lib_bl:
                    conflicts.append(
                        f"DOP {name}: local BIT-LENGTH={local_bl}, library={lib_bl}")
        return conflicts