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 Source #

Describes the changes between two JSON documents.

Constructors

Patch
Fields patchOperations :: [Operation]

Instances

Instances details

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

data Pointer Source #

Pointer to a location in a JSON document.

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

Instances

Instances details

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

data Key Source #

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

Constructors

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

Instances

Instances details

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

data Operation Source #

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

Instances details

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

newtype Config Source #

Configuration for the diff algorithm.

Constructors

Config
Fields configTstBeforeRem :: Bool

Functions

diff :: Value -> Value -> Patch Source #

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

Uses the defaultConfig.

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

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

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

Apply a patch to a JSON document.

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

Apply an Operation to a Value.