From d49dfa50048633eaa04ea40dbc8a0a1b7cad329d Mon Sep 17 00:00:00 2001
From: Leonardo Lamanna <leonardo.lamanna.75@gmail.com>
Date: Fri, 3 Apr 2026 18:18:00 +0200
Subject: [PATCH] create a local copy of empty_domain function from amlgym

---
 main.py               |  2 +-
 olam/util/util.py     | 28 ++++++++++++++++++++++++++++
 pyproject.toml        |  2 +-
 requirements.txt      |  5 +++--
 tests/test_results.py |  2 +-
 5 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/main.py b/main.py
index 30cf536..2b27d40 100644
--- a/main.py
+++ b/main.py
@@ -10,7 +10,7 @@
 import numpy as np
 import unified_planning
 from amlgym.metrics import syntactic_precision, syntactic_recall
-from amlgym.util.util import empty_domain
+from olam.util.util import empty_domain
 from unified_planning.io import PDDLReader, PDDLWriter
 from unified_planning.shortcuts import SequentialSimulator
 
diff --git a/olam/util/util.py b/olam/util/util.py
index 61528c0..5c77bfd 100644
--- a/olam/util/util.py
+++ b/olam/util/util.py
@@ -1,5 +1,7 @@
 import itertools
+import re
 
+from unified_planning.io import PDDLReader, PDDLWriter
 from unified_planning.model import Fluent, Object, Problem
 from unified_planning.plans import ActionInstance
 from unified_planning.shortcuts import BoolType
@@ -7,6 +9,32 @@
 from olam.modeling.symbolic_observation import SymbolicObservation
 
 
+def empty_domain(domain_path: str, empty_domain_path: str = 'empty.pddl'):
+    pddl_domain = PDDLReader().parse_problem(domain_path)
+
+    # Loop through all actions and remove preconditions and effects
+    for action in pddl_domain.actions:
+        action.clear_preconditions()
+        action.clear_effects()
+
+    domain_str = PDDLWriter(pddl_domain).get_domain()
+    pattern = re.compile(
+        r"(:action[\s\S]*?:parameters\s*\([^)]*\))\)",
+        re.MULTILINE
+    )
+
+    replacement = r"\1\n  :precondition (and )\n  :effect (and ))\n"
+
+    # TODO: open issue in up
+    domain_str = domain_str.replace(f"(domain {pddl_domain.name}-domain)",
+                                    f"(domain {pddl_domain.name})")
+
+    with open(empty_domain_path, 'w') as f:
+        f.write(pattern.sub(replacement, domain_str))
+
+    return empty_domain_path
+
+
 def ground_lifted_atoms(action_instance: ActionInstance, lifted_atoms):
     grounded_atoms = set()
     for atom in lifted_atoms:
diff --git a/pyproject.toml b/pyproject.toml
index 1765c88..432fb6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,7 +22,7 @@ addopts = "--ignore=tests/heavy"
 
 [project]
 name = "olam"
-version = "1.0.1"
+version = "1.0.2"
 dynamic = ["dependencies"]
 requires-python = ">=3.10"
 maintainers = [
diff --git a/requirements.txt b/requirements.txt
index d550880..5478d0a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,8 +1,9 @@
 unified-planning == 1.3.0
 up-fast-downward == 0.5.2
 clingo == 5.8.0
-amlgym == 1.0.7
+scikit-learn
 ruff
 pytest
 pandas
-gymnasium
\ No newline at end of file
+gymnasium
+amlgym
\ No newline at end of file
diff --git a/tests/test_results.py b/tests/test_results.py
index c95548f..1c221c3 100644
--- a/tests/test_results.py
+++ b/tests/test_results.py
@@ -4,7 +4,7 @@
 import pandas as pd
 import pytest
 from amlgym.metrics import syntactic_precision, syntactic_recall
-from amlgym.util.util import empty_domain
+from olam.util.util import empty_domain
 from unified_planning.io import PDDLReader
 from unified_planning.shortcuts import SequentialSimulator