Merge branch 'release-0.3.0'

1 files changed, 39 insertions, 3 deletions

diff --git a/src/leap/common/config/baseconfig.py b/src/leap/common/config/baseconfig.py
index 699d734..e310bc0 100644
--- a/src/leap/common/config/baseconfig.py
+++ b/src/leap/common/config/baseconfig.py
@@ -26,7 +26,7 @@ import os
 
 from abc import ABCMeta, abstractmethod
 
-from leap.common.check import leap_assert
+from leap.common.check import leap_assert, leap_check
 from leap.common.files import mkdir_p
 from leap.common.config.pluggableconfig import PluggableConfig
 from leap.common.config.prefixers import get_platform_prefixer
@@ -34,6 +34,12 @@ from leap.common.config.prefixers import get_platform_prefixer
 logger = logging.getLogger(__name__)
 
 
+class NonExistingSchema(Exception):
+    """
+    Raised if the schema needed to verify the config is None.
+    """
+
+
 class BaseConfig:
     """
     Abstract base class for any JSON based configuration.
@@ -55,13 +61,27 @@ class BaseConfig:
     def __init__(self):
         self._data = {}
         self._config_checker = None
+        self._api_version = None
 
     @abstractmethod
+    def _get_schema(self):
+        """
+        Returns the schema corresponding to the version given.
+
+        :rtype: dict or None if the version is not supported.
+        """
+        pass
+
     def _get_spec(self):
         """
         Returns the spec object for the specific configuration.
+
+        :rtype: dict or None if the version is not supported.
         """
-        return None
+        leap_assert(self._api_version is not None,
+                    "You should set the API version.")
+
+        return self._get_schema()
 
     def _safe_get_value(self, key):
         """
@@ -73,6 +93,17 @@ class BaseConfig:
         leap_assert(self._config_checker, "Load the config first")
         return self._config_checker.config.get(key, None)
 
+    def set_api_version(self, version):
+        """
+        Sets the supported api version.
+
+        :param api_version: the version of the api supported by the provider.
+        :type api_version: str
+        """
+        self._api_version = version
+        leap_assert(self._get_schema() is not None,
+                    "Version %s is not supported." % (version, ))
+
     def get_path_prefix(self):
         """
         Returns the platform dependant path prefixer
@@ -112,6 +143,7 @@ class BaseConfig:
     def load(self, path="", data=None, mtime=None, relative=True):
         """
         Loads the configuration from disk.
+        It may raise NonExistingSchema exception.
 
         :param path: if relative=True, this is a relative path
                      to configuration. The absolute path
@@ -131,8 +163,12 @@ class BaseConfig:
         else:
             config_path = path
 
+        schema = self._get_spec()
+        leap_check(schema is not None,
+                   "There is no schema to use.", NonExistingSchema)
+
         self._config_checker = PluggableConfig(format="json")
-        self._config_checker.options = copy.deepcopy(self._get_spec())
+        self._config_checker.options = copy.deepcopy(schema)
 
         try:
             if data is None: