root / htools / Ganeti / Query / Types.hs @ 046fe3f5
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{-| Implementation of the Ganeti Query2 basic types. |
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These are types internal to the library, and for example clients that |
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use the library should not need to import it. |
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-} |
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{- |
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Copyright (C) 2012 Google Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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This program is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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General Public License for more details. |
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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02110-1301, USA. |
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-} |
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module Ganeti.Query.Types where |
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import qualified Data.Map as Map |
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import Ganeti.Qlang |
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import Ganeti.Objects |
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-- | The type of field getters. The \"a\" type represents the type |
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-- we're querying, whereas the \"b\" type represents the \'runtime\' |
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-- data for that type (if any). Note that we don't support multiple |
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-- runtime sources, and we always consider the entire configuration as |
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-- a given (so no equivalent for Python's /*_CONFIG/ and /*_GROUP/; |
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-- configuration accesses are cheap for us). |
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data FieldGetter a b = FieldSimple (a -> ResultEntry) |
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| FieldRuntime (b -> a -> ResultEntry) |
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| FieldConfig (ConfigData -> a -> ResultEntry) |
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| FieldUnknown |
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-- | Alias for a field data (definition and getter). |
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type FieldData a b = (FieldDefinition, FieldGetter a b) |
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-- | Alias for a field data list. |
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type FieldList a b = [FieldData a b] |
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-- | Alias for field maps. |
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type FieldMap a b = Map.Map String (FieldData a b) |