Implement fields introspection function

Author: ian-coccimiglio

src/scyjava/__init__.py

@@ -124,8 +124,11 @@
     jclass,
     jinstance,
     jstacktrace,
-    methods,
     find_java_methods,
+    find_java_fields,
+    methods,
+    fields,
+    attrs,
     numeric_bounds,
 )
 from ._versions import compare_version, get_version, is_version_at_least

src/scyjava/_types.py

@@ -396,9 +396,11 @@ def find_java_fields(data) -> list[dict[str, Any]]:
 
     for f in fields:
         name = f.getName()
-        table.append(name)
+        ftype = f.getType().getName()
+        table.append({"name": name, "type": ftype})
+    sorted_table = sorted(table, key=lambda d: d["name"])
 
-    return table
+    return sorted_table
 
 
 def _map_syntax(base_type):
@@ -441,39 +443,18 @@ def _make_pretty_string(entry, offset):
     obj_name = f"{entry['name']}"
     modifier = f"{'*':>4}" if entry["static"] else f"{'':>4}"
 
+    # Handle fields
+    if entry["arguments"] is None:
+        return f"{return_val} = {obj_name}\n"
+
     # Handle methods with no arguments
-    if not entry["arguments"]:
+    if len(entry["arguments"]) == 0:
         return f"{return_val} {modifier} = {obj_name}()\n"
     else:
         arg_string = ", ".join([r.__str__() for r in entry["arguments"]])
         return f"{return_val} {modifier} = {obj_name}({arg_string})\n"
 
 
-# TODO
-def fields(data) -> str:
-    """
-    Writes data to a printed field names with the field value.
-    :param data: The object or class to inspect.
-    """
-    # table = find_java_fields(data)
-
-    all_fields = ""
-    ################
-    # FILL THIS IN #
-    ################
-
-    print(all_fields)
-
-
-# TODO
-def attrs(data):
-    """
-    Writes data to a printed field names with the field value. Alias for `fields(data)`.
-    :param data: The object or class to inspect.
-    """
-    fields(data)
-
-
 def get_source_code(data):
     """
     Tries to find the source code using Scijava's SourceFinder'
@@ -496,6 +477,36 @@ def get_source_code(data):
         return f"Unexpected {err=}, {type(err)=}"
 
 
+def fields(data) -> str:
+    """
+    Writes data to a printed field names with the field value.
+    :param data: The object or class to inspect.
+    """
+    table = find_java_fields(data)
+    if len(table) == 0:
+        print("No fields found")
+        return
+
+    all_fields = ""
+    offset = max(list(map(lambda entry: len(entry["type"]), table)))
+    for entry in table:
+        entry["returns"] = _map_syntax(entry["type"])
+        entry["static"] = False
+        entry["arguments"] = None
+        entry_string = _make_pretty_string(entry, offset)
+        all_fields += entry_string
+
+    print(all_fields)
+
+
+def attrs(data):
+    """
+    Writes data to a printed field names with the field value. Alias for `fields(data)`.
+    :param data: The object or class to inspect.
+    """
+    fields(data)
+
+
 def methods(data, static: bool | None = None, source: bool = True) -> str:
     """
     Writes data to a printed string of class methods with inputs, static modifier, arguments, and return values.