upload android base code part3

android/art/test/utils/python/testgen/mixins.py

@@ -0,0 +1,141 @@
+#!/usr/bin/python3
+#
+# Copyright (C) 2015 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Common mixins and abstract base classes (ABCs) useful for writing test generators in python
+"""
+
+import abc
+import collections.abc
+import functools
+
+class Named(metaclass=abc.ABCMeta):
+  """
+  An abc that defines a get_name method.
+  """
+
+  @abc.abstractmethod
+  def get_name(self):
+    """
+    Returns a unique name to use as the identity for implementing comparisons.
+    """
+    pass
+
+class FileLike(metaclass=abc.ABCMeta):
+  """
+  An abc that defines get_file_name and get_file_extension methods.
+  """
+
+  @abc.abstractmethod
+  def get_file_name(self):
+    """Returns the filename this object represents"""
+    pass
+
+  @abc.abstractmethod
+  def get_file_extension(self):
+    """Returns the file extension of the file this object represents"""
+    pass
+
+@functools.lru_cache(maxsize=None)
+def get_file_extension_mixin(ext):
+  """
+  Gets a mixin that defines get_file_name(self) in terms of get_name(self) with the
+  given file extension.
+  """
+
+  class FExt(object):
+    """
+    A mixin defining get_file_name(self) in terms of get_name(self)
+    """
+
+    def get_file_name(self):
+      return self.get_name() + ext
+
+    def get_file_extension(self):
+      return ext
+
+  # Register the ABCs
+  Named.register(FExt)
+  FileLike.register(FExt)
+
+  return FExt
+
+class SmaliFileMixin(get_file_extension_mixin(".smali")):
+  """
+  A mixin that defines that the file this class belongs to is get_name() + ".smali".
+  """
+  pass
+
+class JavaFileMixin(get_file_extension_mixin(".java")):
+  """
+  A mixin that defines that the file this class belongs to is get_name() + ".java".
+  """
+  pass
+
+class NameComparableMixin(object):
+  """
+  A mixin that defines the object comparison and related functionality in terms
+  of a get_name(self) function.
+  """
+
+  def __lt__(self, other):
+    return self.get_name() < other.get_name()
+
+  def __gt__(self, other):
+    return self.get_name() > other.get_name()
+
+  def __eq__(self, other):
+    return self.get_name() == other.get_name()
+
+  def __le__(self, other):
+    return self.get_name() <= other.get_name()
+
+  def __ge__(self, other):
+    return self.get_name() >= other.get_name()
+
+  def __ne__(self, other):
+    return self.get_name() != other.get_name()
+
+  def __hash__(self):
+    return hash(self.get_name())
+
+Named.register(NameComparableMixin)
+collections.abc.Hashable.register(NameComparableMixin)
+
+class DumpMixin(metaclass=abc.ABCMeta):
+  """
+  A mixin to add support for dumping the string representation of an object to a
+  file. Requires the get_file_name(self) method be defined.
+  """
+
+  @abc.abstractmethod
+  def __str__(self):
+    """
+    Returns the data to be printed to a file by dump.
+    """
+    pass
+
+  def dump(self, directory):
+    """
+    Dump this object to a file in the given directory
+    """
+    out_file = directory / self.get_file_name()
+    if out_file.exists():
+      out_file.unlink()
+    with out_file.open('w') as out:
+      print(str(self), file=out)
+
+FileLike.register(DumpMixin)