Package com.vaadin.flow.internal

Class JsonUtils

java.lang.Object
com.vaadin.flow.internal.JsonUtils
public final class JsonUtils extends Object
Helpers for using elemental.json.

For internal use only. May be renamed or removed in a future release.

Since:
1.0
Author:
Vaadin Ltd

  • Method Summary

    Modifier and Type
    Method
    Description
    static Collector<elemental.json.JsonValue,elemental.json.JsonArray,elemental.json.JsonArray>
    asArray()
    Creates a collector that collects values into a JSON array.
    static elemental.json.JsonObject
    beanToJson(Object bean)
    Converts the given bean to JSON.
    static boolean
    booleanEqual(elemental.json.JsonValue a, elemental.json.JsonValue b)
     
    static elemental.json.JsonArray
    createArray(elemental.json.JsonValue... values)
    Creates a new JSON array with the given values.
    static <T> elemental.json.JsonObject
    createObject(Map<String,T> map, Function<T,elemental.json.JsonValue> itemToJson)
    Converts the given map into a JSON object by converting each map value to a JSON value.
    static boolean
    jsonEquals(elemental.json.JsonValue a, elemental.json.JsonValue b)
    Compares two json values for deep equality.
    static elemental.json.JsonArray
    listToJson(List<?> list)
    Converts the given list to JSON.
    static elemental.json.JsonObject
    mapToJson(Map<String,?> map)
    Converts the given map to JSON.
    static boolean
    numbersEqual(elemental.json.JsonValue a, elemental.json.JsonValue b)
     
    static DoubleStream
    numberStream(elemental.json.JsonArray array)
    Creates a double stream from a JSON array of numbers.
    static Stream<elemental.json.JsonObject>
    objectStream(elemental.json.JsonArray array)
    Creates a stream from a JSON array of objects.
    static <T> T
    readToObject(elemental.json.JsonObject jsonObject, Class<T> tClass)
    Converts JsonObject into Java object of given type.
    static <T extends elemental.json.JsonValue>
    Stream<T>
    stream(elemental.json.JsonArray array)
    Creates a stream from a JSON array.
    static boolean
    stringEqual(elemental.json.JsonValue a, elemental.json.JsonValue b)
     

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Method Details

    • jsonEquals

      public static boolean jsonEquals(elemental.json.JsonValue a, elemental.json.JsonValue b)
      Compares two json values for deep equality.

      This is a helper for overcoming the fact that JsonValue doesn't override Object.equals(Object) and JsonValue.jsEquals(JsonValue) 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(elemental.json.JsonValue a, elemental.json.JsonValue b)

    • booleanEqual

      public static boolean booleanEqual(elemental.json.JsonValue a, elemental.json.JsonValue b)

    • numbersEqual

      public static boolean numbersEqual(elemental.json.JsonValue a, elemental.json.JsonValue b)

    • stream

      public static <T extends elemental.json.JsonValue> Stream<T> stream(elemental.json.JsonArray 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<elemental.json.JsonObject> objectStream(elemental.json.JsonArray 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(elemental.json.JsonArray 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<elemental.json.JsonValue,elemental.json.JsonArray,elemental.json.JsonArray> asArray()
      Creates a collector that collects values into a JSON array.
      Returns:
      the collector

    • createArray

      public static elemental.json.JsonArray createArray(elemental.json.JsonValue... 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> elemental.json.JsonObject createObject(Map<String,T> map, Function<T,elemental.json.JsonValue> 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 elemental.json.JsonObject 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 elemental.json.JsonArray 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 elemental.json.JsonObject 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(elemental.json.JsonObject 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