Method Details

• getMapper

  public static com.fasterxml.jackson.databind.ObjectMapper getMapper()

• createObjectNode

  public static com.fasterxml.jackson.databind.node.ObjectNode createObjectNode()

  Create a new ObjectNode.

  Returns:

  ObjectNode

• createArrayNode

  public static com.fasterxml.jackson.databind.node.ArrayNode createArrayNode()

  Create a new ArrayNode.

  Returns:

  ArrayNode

• readTree

  public static com.fasterxml.jackson.databind.node.ObjectNode readTree(String json)

  Read Json string to JsonNode.

  Returns:

  JsonNode representation of given json string

• createNode

  public static com.fasterxml.jackson.databind.JsonNode createNode(Object value)

  Create a JsonNode from value.

  Returns:

  JsonNode for given value content

• jsonEquals

  public static boolean jsonEquals(com.fasterxml.jackson.databind.JsonNode a, com.fasterxml.jackson.databind.JsonNode b)

  Compares two json values for deep equality.

  This is a helper for overcoming the fact that ObjectNode doesn't override Object.equals(Object) and { ObjectNode#jsEquals(ObjectNode)} is defined to use JavaScript semantics where arrays and objects are equals only based on identity.

  Parameters:

  a - the first json value to check, may not be null

  b - the second json value to check, may not be null

  Returns:

  true if both json values are the same; false otherwise

• stringEqual

  public static boolean stringEqual(com.fasterxml.jackson.databind.JsonNode a, com.fasterxml.jackson.databind.JsonNode b)

  Compare String value of two JsonNode values.

  Parameters:

  a - Value one

  b - Value two

  Returns:

  true if text content equals

• booleanEqual

  public static boolean booleanEqual(com.fasterxml.jackson.databind.JsonNode a, com.fasterxml.jackson.databind.JsonNode b)

  Compare boolean value of two JsonNode values.

  Parameters:

  a - Value one

  b - Value two

  Returns:

  true if text boolean equals

• numbersEqual

  public static boolean numbersEqual(com.fasterxml.jackson.databind.JsonNode a, com.fasterxml.jackson.databind.JsonNode b)

  Compare number value of two JsonNode values.

  Parameters:

  a - Value one

  b - Value two

  Returns:

  true if number content equals

• getKeys

  public static List<String> getKeys(com.fasterxml.jackson.databind.JsonNode node)

• stream

  public static <T extends com.fasterxml.jackson.databind.JsonNode> Stream<T> stream(com.fasterxml.jackson.databind.node.ArrayNode array)

  Creates a stream from a JSON array.

  Type Parameters:

  T - the stream type

  Parameters:

  array - the JSON array to create a stream from

  Returns:

  a stream of JSON values

• objectStream

  public static Stream<com.fasterxml.jackson.databind.JsonNode> objectStream(com.fasterxml.jackson.databind.node.ArrayNode array)

  Creates a stream from a JSON array of objects. This method does not verify that all items in the array are actually JSON objects instead of some other JSON type.

  Parameters:

  array - the JSON array to create a stream from

  Returns:

  a stream of JSON objects

• numberStream

  public static DoubleStream numberStream(com.fasterxml.jackson.databind.node.ArrayNode array)

  Creates a double stream from a JSON array of numbers. This method does not verify that all items in the array are actually JSON numbers instead of some other JSON type.

  Parameters:

  array - the JSON array to create a stream from

  Returns:

  a double stream of the values in the array

• asArray

  public static Collector<com.fasterxml.jackson.databind.JsonNode,com.fasterxml.jackson.databind.node.ArrayNode,com.fasterxml.jackson.databind.node.ArrayNode> asArray()

  Creates a collector that collects values into a JSON array.

  Returns:

  the collector

• createArray

  public static com.fasterxml.jackson.databind.node.ArrayNode createArray(com.fasterxml.jackson.databind.JsonNode... values)

  Creates a new JSON array with the given values.

  Parameters:

  values - the values that should be in the created array

  Returns:

  the created array

• createObject

  public static <T> com.fasterxml.jackson.databind.node.ObjectNode createObject(Map<String,T> map, Function<T,com.fasterxml.jackson.databind.JsonNode> itemToJson)

  Converts the given map into a JSON object by converting each map value to a JSON value.

  Type Parameters:

  T - the type of the map values

  Parameters:

  map - the map to convert into a JSON object

  itemToJson - callback for converting map values to JSON

  Returns:

  the created object

• beanToJson

  public static com.fasterxml.jackson.databind.node.ObjectNode beanToJson(Object bean)

  Converts the given bean to JSON.

  Parameters:

  bean - the bean to convert, not null

  Returns:

  a JSON representation of the bean

• listToJson

  public static com.fasterxml.jackson.databind.node.ArrayNode listToJson(List<?> list)

  Converts the given list to JSON.

  Parameters:

  list - the list to convert, not null

  Returns:

  a JSON representation of the bean

• mapToJson

  public static com.fasterxml.jackson.databind.node.ObjectNode mapToJson(Map<String,?> map)

  Converts the given map to JSON.

  Parameters:

  map - the map to convert, not null

  Returns:

  a JSON representation of the bean

• readToObject

  public static <T> T readToObject(com.fasterxml.jackson.databind.node.ObjectNode jsonObject, Class<T> tClass)

  Converts JsonObject into Java object of given type.

  Type Parameters:

  T - type of result instance

  Parameters:

  jsonObject - JSON object to convert, not null

  tClass - class of converted object instance

  Returns:

  converted object instance

• readValue

  public static <T> T readValue(com.fasterxml.jackson.databind.node.ObjectNode jsonValue, Class<T> tClass)

  Converts ObjectNode into Java object of given type.

  Type Parameters:

  T - type of result instance

  Parameters:

  jsonValue - JSON value to convert, not null

  tClass - class of converted object instance

  Returns:

  converted object instance

• readValue

  public static <T> T readValue(com.fasterxml.jackson.databind.node.ObjectNode jsonValue, com.fasterxml.jackson.core.type.TypeReference<T> typeReference)

  Converts ObjectNode into Java object of given type.

  Type Parameters:

  T - type of result instance

  Parameters:

  jsonValue - JSON value to convert, not null

  typeReference - type reference of converted object instance

  Returns:

  converted object instance

• writeValue

  public static com.fasterxml.jackson.databind.node.ObjectNode writeValue(Object object)

  Converts Java object into ObjectNode.

  Parameters:

  object - Java object to convert

  Returns:

  converted JSON value

• toFileJson

  public static String toFileJson(com.fasterxml.jackson.databind.JsonNode node) throws com.fasterxml.jackson.core.JsonProcessingException

  Converts the given node into JSON suitable for writing into a file such as package.json.

  Parameters:

  node - the node to convert

  Returns:

  the JSON string

  Throws:

  com.fasterxml.jackson.core.JsonProcessingException - if the node cannot be converted