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# This file is part of daf_butler. 

# 

# Developed for the LSST Data Management System. 

# This product includes software developed by the LSST Project 

# (http://www.lsst.org). 

# See the COPYRIGHT file at the top-level directory of this distribution 

# for details of code ownership. 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) 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 General Public License for more details. 

# 

# You should have received a copy of the GNU General Public License 

# along with this program. If not, see <http://www.gnu.org/licenses/>. 

 

from contextlib import contextmanager 

from typing import Any, Iterator 

 

from lsst.daf.butler import DimensionUniverse, ddl 

 

 

class DummyRegistry: 

"""Dummy Registry, for Datastore test purposes. 

""" 

def __init__(self): 

self._counter = 0 

self._entries = {} 

self._externalTableRows = {} 

self._externalTableSpecs = {} 

self.dimensions = DimensionUniverse() 

 

def registerOpaqueTable(self, name: str, spec: ddl.TableSpec): 

self._externalTableSpecs[name] = spec 

self._externalTableRows[name] = [] 

 

def insertOpaqueData(self, name: str, *data: dict): 

spec = self._externalTableSpecs[name] 

uniqueConstraints = list(spec.unique) 

uniqueConstraints.append(tuple(field.name for field in spec.fields if field.primaryKey)) 

for d in data: 

for constraint in uniqueConstraints: 

matching = list(self.fetchOpaqueData(name, **{k: d[k] for k in constraint})) 

if len(matching) != 0: 

raise RuntimeError(f"Unique constraint {constraint} violation in external table {name}.") 

self._externalTableRows[name].append(d) 

 

def fetchOpaqueData(self, name: str, **where: Any) -> Iterator[dict]: 

for d in self._externalTableRows[name]: 

if all(d[k] == v for k, v in where.items()): 

yield d 

 

def deleteOpaqueData(self, name: str, **where: Any): 

kept = [] 

for d in self._externalTableRows[name]: 

if not all(d[k] == v for k, v in where.items()): 

kept.append(d) 

self._externalTableRows[name] = kept 

 

def insertDatasetLocations(self, datastoreName, refs): 

# Only set ID if ID is 0 or None 

for ref in refs: 

incrementCounter = True 

if ref.id is None or ref.id == 0: 

ref._id = self._counter 

incrementCounter = False 

if ref.id not in self._entries: 

self._entries[ref.id] = set() 

self._entries[ref.id].add(datastoreName) 

if incrementCounter: 

self._counter += 1 

 

def getDatasetLocations(self, ref): 

return self._entries[ref.id].copy() 

 

def removeDatasetLocation(self, datastoreName, ref): 

self._entries[ref.id].remove(datastoreName) 

 

def makeDatabaseDict(self, table, key, value): 

return dict() 

 

@contextmanager 

def transaction(self): 

yield