+
−#!/usr/bin/python2.5
+
−#
+
−# Copyright 2009 the Melange authors.
+
−#
+
−# 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.
+
−
+
−"""Module containing some basic caching functions.
+
−"""
+
−
+
−__authors__ = [
+
−    '"Sverre Rabbelier" <sverre@rabbelier.nl>',
+
−  ]
+
−
+
−
+
−from functools import wraps
+
−
+
−
+
−def getCacher(get, put):
+
−  """Returns a caching decorator that uses get and put.
+
−  """
+
−
+
−  # TODO(SRabbelier) possibly accept 'key' instead, and define
+
−  # get and put in terms of key, depends on further usage
+
−
+
−  def cache(func):
+
−    """Decorator that caches the result from func.
+
−    """
+
−
+
−    @wraps(func)
+
−    def wrapper(*args, **kwargs):
+
−      """Decorator wrapper method.
+
−      """
+
−      result, key = get(*args, **kwargs)
+
−      if result:
+
−        return result
+
−
+
−      result = func(*args, **kwargs)
+
−
+
−      if key:
+
−        put(result, key, *args, **kwargs)
+
−
+
−      return result
+
−
+
−    return wrapper
+
−
+
−  return cache