Eslavich simpler integer type

CHANGES.rst

@@ -33,6 +33,7 @@ The ASDF Standard is at v1.6.0
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
 - Add support for python 3.12 [#1641]
+- Move IntegerType to converter and drop cache of converted values. [#1527]
 
 2.15.1 (2023-08-07)
 -------------------

asdf/_tests/tags/core/tests/test_integer.py

@@ -58,26 +58,6 @@ def test_integer_storage(tmpdir, inline):
         assert rf.tree["integer"]["string"] == str(value)
 
 
-def test_integer_storage_duplication(tmpdir):
-    tmpfile = str(tmpdir.join("integer.asdf"))
-
-    random.seed(0)
-    value = random.getrandbits(1000)
-    tree = {"integer1": IntegerType(value), "integer2": IntegerType(value)}
-
-    with asdf.AsdfFile(tree) as af:
-        af.write_to(tmpfile)
-
-    with asdf.open(tmpfile, _force_raw_types=True) as rf:
-        assert len(rf._blocks.blocks) == 1
-        assert rf.tree["integer1"]["words"]["source"] == 0
-        assert rf.tree["integer2"]["words"]["source"] == 0
-
-    with asdf.open(tmpfile) as aa:
-        assert aa.tree["integer1"] == value
-        assert aa.tree["integer2"] == value
-
-
 def test_integer_conversion():
     random.seed(0)
     value = random.getrandbits(1000)

asdf/core/_converters/integer.py

@@ -0,0 +1,45 @@
+import numpy as np
+
+from asdf.extension import Converter
+
+
+class IntegerConverter(Converter):
+    tags = [
+        "tag:stsci.edu:asdf/core/integer-1.0.0",
+        "tag:stsci.edu:asdf/core/integer-1.1.0",
+    ]
+
+    types = ["asdf.tags.core.integer.IntegerType"]
+
+    def to_yaml_tree(self, obj, tag, ctx):
+        abs_value = int(np.abs(obj._value))
+
+        # pack integer value into 32-bit words
+        words = []
+        value = abs_value
+        while value > 0:
+            words.append(value & 0xFFFFFFFF)
+            value >>= 32
+
+        array = np.array(words, dtype=np.uint32)
+
+        tree = {}
+        ctx.set_array_storage(array, obj._storage)
+        tree["words"] = array
+        tree["sign"] = obj._sign
+        tree["string"] = str(int(obj._value))
+
+        return tree
+
+    def from_yaml_tree(self, node, tag, ctx):
+        from asdf.tags.core.integer import IntegerType
+
+        value = 0
+        for x in node["words"][::-1]:
+            value <<= 32
+            value |= int(x)
+
+        if node["sign"] == "-":
+            value = -value
+
+        return IntegerType(value)

asdf/core/_extensions.py

@@ -3,6 +3,7 @@
 from ._converters.complex import ComplexConverter
 from ._converters.constant import ConstantConverter
 from ._converters.external_reference import ExternalArrayReferenceConverter
+from ._converters.integer import IntegerConverter
 from ._converters.ndarray import NDArrayConverter
 from ._converters.reference import ReferenceConverter
 from ._converters.tree import (
@@ -21,6 +22,7 @@
     AsdfObjectConverter(),
     ExtensionMetadataConverter(),
     HistoryEntryConverter(),
+    IntegerConverter(),
     SoftwareConverter(),
     SubclassMetadataConverter(),
     ReferenceConverter(),

asdf/tags/core/integer.py

@@ -1,11 +1,7 @@
 from numbers import Integral
 
-import numpy as np
 
-from asdf import _types
-
-
-class IntegerType(_types._AsdfType):
+class IntegerType:
     """
     Enables the storage of arbitrarily large integer values
 
@@ -42,12 +38,6 @@ class IntegerType(_types._AsdfType):
     ...     assert aa['largeval'] == largeval
     """
 
-    name = "core/integer"
-    version = "1.0.0"
-    supported_versions = {"1.0.0", "1.1.0"}
-
-    _value_cache = {}
-
     def __init__(self, value, storage_type="internal"):
         if storage_type not in ["internal", "inline"]:
             msg = f"storage_type '{storage_type}' is not a recognized storage type"
@@ -56,45 +46,6 @@ def __init__(self, value, storage_type="internal"):
         self._sign = "-" if value < 0 else "+"
         self._storage = storage_type
 
-    @classmethod
-    def to_tree(cls, node, ctx):
-        abs_value = int(np.abs(node._value))
-
-        # If the same value has already been stored, reuse the array
-        if abs_value in cls._value_cache:
-            array = cls._value_cache[abs_value]
-        else:
-            # pack integer value into 32-bit words
-            words = []
-            value = abs_value
-            while value > 0:
-                words.append(value & 0xFFFFFFFF)
-                value >>= 32
-
-            array = np.array(words, dtype=np.uint32)
-            if node._storage == "internal":
-                cls._value_cache[abs_value] = array
-
-        tree = {}
-        ctx.set_array_storage(array, node._storage)
-        tree["words"] = array
-        tree["sign"] = node._sign
-        tree["string"] = str(int(node._value))
-
-        return tree
-
-    @classmethod
-    def from_tree(cls, tree, ctx):
-        value = 0
-        for x in tree["words"][::-1]:
-            value <<= 32
-            value |= int(x)
-
-        if tree["sign"] == "-":
-            value = -value
-
-        return cls(value)
-
     def __int__(self):
         return int(self._value)