Safe Haskell	None
Language	Haskell2010

Data.Aeson.Diff

Contents

Patches
Functions

Description

This module implements data types and operations to represent the differences between JSON documents (i.e. a patch), to compare JSON documents and extract such a patch, and to apply such a patch to a JSON document.

Synopsis

newtype Patch = Patch {
- patchOperations :: [Operation]
}
data Pointer
data Key
- = OKey Text
- | AKey Int
data Operation
- = Add {
  - changePointer :: Pointer
  - changeValue :: Value
  }
- | Cpy {
  - changePointer :: Pointer
  - fromPointer :: Pointer
  }
- | Mov {
  - changePointer :: Pointer
  - fromPointer :: Pointer
  }
- | Rem {
  - changePointer :: Pointer
  }
- | Rep {
  - changePointer :: Pointer
  - changeValue :: Value
  }
- | Tst {
  - changePointer :: Pointer
  - changeValue :: Value
  }
newtype Config = Config {
- configTstBeforeRem :: Bool
}
diff :: Value -> Value -> Patch
diff' :: Config -> Value -> Value -> Patch
patch :: Patch -> Value -> Result Value
applyOperation :: Operation -> Value -> Result Value

Patches

newtype Patch #

Describes the changes between two JSON documents.

Constructors

Patch
Fields patchOperations :: [Operation]

Instances

Eq Patch #
Instance details Defined in Data.Aeson.Patch Methods (==) :: Patch -> Patch -> Bool # (/=) :: Patch -> Patch -> Bool #
Show Patch #
Instance details Defined in Data.Aeson.Patch Methods showsPrec :: Int -> Patch -> ShowS # show :: Patch -> String # showList :: [Patch] -> ShowS #
Semigroup Patch #
Instance details Defined in Data.Aeson.Patch Methods (<>) :: Patch -> Patch -> Patch # sconcat :: NonEmpty Patch -> Patch # stimes :: Integral b => b -> Patch -> Patch #
Monoid Patch #
Instance details Defined in Data.Aeson.Patch Methods mempty :: Patch # mappend :: Patch -> Patch -> Patch # mconcat :: [Patch] -> Patch #
ToJSON Patch #
Instance details Defined in Data.Aeson.Patch Methods toJSON :: Patch -> Value # toEncoding :: Patch -> Encoding # toJSONList :: [Patch] -> Value # toEncodingList :: [Patch] -> Encoding #
FromJSON Patch #
Instance details Defined in Data.Aeson.Patch Methods parseJSON :: Value -> Parser Patch # parseJSONList :: Value -> Parser [Patch] #

data Pointer #

Pointer to a location in a JSON document.

Defined in RFC 6901 http://tools.ietf.org/html/rfc6901

Instances

Eq Pointer #
Instance details Defined in Data.Aeson.Pointer Methods (==) :: Pointer -> Pointer -> Bool # (/=) :: Pointer -> Pointer -> Bool #
Ord Pointer #
Instance details Defined in Data.Aeson.Pointer Methods compare :: Pointer -> Pointer -> Ordering # (<) :: Pointer -> Pointer -> Bool # (<=) :: Pointer -> Pointer -> Bool # (>) :: Pointer -> Pointer -> Bool # (>=) :: Pointer -> Pointer -> Bool # max :: Pointer -> Pointer -> Pointer # min :: Pointer -> Pointer -> Pointer #
Show Pointer #
Instance details Defined in Data.Aeson.Pointer Methods showsPrec :: Int -> Pointer -> ShowS # show :: Pointer -> String # showList :: [Pointer] -> ShowS #
Semigroup Pointer #
Instance details Defined in Data.Aeson.Pointer Methods (<>) :: Pointer -> Pointer -> Pointer # sconcat :: NonEmpty Pointer -> Pointer # stimes :: Integral b => b -> Pointer -> Pointer #
Monoid Pointer #
Instance details Defined in Data.Aeson.Pointer Methods mempty :: Pointer # mappend :: Pointer -> Pointer -> Pointer # mconcat :: [Pointer] -> Pointer #
ToJSON Pointer #
Instance details Defined in Data.Aeson.Pointer Methods toJSON :: Pointer -> Value # toEncoding :: Pointer -> Encoding # toJSONList :: [Pointer] -> Value # toEncodingList :: [Pointer] -> Encoding #
FromJSON Pointer #
Instance details Defined in Data.Aeson.Pointer Methods parseJSON :: Value -> Parser Pointer # parseJSONList :: Value -> Parser [Pointer] #

data Key #

Path components to traverse a single layer of a JSON document.

Constructors

OKey Text	Traverse a `Value` with an `Value` constructor.
AKey Int	Traverse a `Value` with an `Value` constructor.

Instances

Eq Key #
Instance details Defined in Data.Aeson.Pointer Methods (==) :: Key -> Key -> Bool # (/=) :: Key -> Key -> Bool #
Ord Key #
Instance details Defined in Data.Aeson.Pointer Methods compare :: Key -> Key -> Ordering # (<) :: Key -> Key -> Bool # (<=) :: Key -> Key -> Bool # (>) :: Key -> Key -> Bool # (>=) :: Key -> Key -> Bool # max :: Key -> Key -> Key # min :: Key -> Key -> Key #
Show Key #
Instance details Defined in Data.Aeson.Pointer Methods showsPrec :: Int -> Key -> ShowS # show :: Key -> String # showList :: [Key] -> ShowS #
ToJSON Key #
Instance details Defined in Data.Aeson.Pointer Methods toJSON :: Key -> Value # toEncoding :: Key -> Encoding # toJSONList :: [Key] -> Value # toEncodingList :: [Key] -> Encoding #
FromJSON Key #
Instance details Defined in Data.Aeson.Pointer Methods parseJSON :: Value -> Parser Key # parseJSONList :: Value -> Parser [Key] #

data Operation #

An Operation describes the operations which can appear as part of a JSON Patch.

See RFC 6902 Section 4 http://tools.ietf.org/html/rfc6902#section-4.

Constructors

Add	http://tools.ietf.org/html/rfc6902#section-4.1
Fields changePointer :: Pointer changeValue :: Value
Cpy	http://tools.ietf.org/html/rfc6902#section-4.5
Fields changePointer :: Pointer fromPointer :: Pointer
Mov	http://tools.ietf.org/html/rfc6902#section-4.4
Fields changePointer :: Pointer fromPointer :: Pointer
Rem	http://tools.ietf.org/html/rfc6902#section-4.2
Fields changePointer :: Pointer
Rep	http://tools.ietf.org/html/rfc6902#section-4.3
Fields changePointer :: Pointer changeValue :: Value
Tst	http://tools.ietf.org/html/rfc6902#section-4.6
Fields changePointer :: Pointer changeValue :: Value

Instances

Eq Operation #
Instance details Defined in Data.Aeson.Patch Methods (==) :: Operation -> Operation -> Bool # (/=) :: Operation -> Operation -> Bool #
Show Operation #
Instance details Defined in Data.Aeson.Patch Methods showsPrec :: Int -> Operation -> ShowS # show :: Operation -> String # showList :: [Operation] -> ShowS #
ToJSON Operation #
Instance details Defined in Data.Aeson.Patch Methods toJSON :: Operation -> Value # toEncoding :: Operation -> Encoding # toJSONList :: [Operation] -> Value # toEncodingList :: [Operation] -> Encoding #
FromJSON Operation #
Instance details Defined in Data.Aeson.Patch Methods parseJSON :: Value -> Parser Operation # parseJSONList :: Value -> Parser [Operation] #

newtype Config #

Configuration for the diff algorithm.

Constructors

Config
Fields configTstBeforeRem :: Bool

Functions

diff :: Value -> Value -> Patch #

Compare two JSON documents and generate a patch describing the differences.

Uses the defaultConfig.

diff' :: Config -> Value -> Value -> Patch #

Compare two JSON documents and generate a patch describing the differences.

patch :: Patch -> Value -> Result Value #

Apply a patch to a JSON document.

applyOperation :: Operation -> Value -> Result Value #

Apply an Operation to a Value.