JsonConverter

Description

The JsonConverter class allows you to convert arbitrary values (e.g. a JSON object) from and to JSON (JavaScript Object Notation) strings.

Static methods

fromJson

Converts a JSON string into a value of the type specified by a TypeCode.

public static T fromJson(Class type, String value) throws JsonMappingException, JsonParseException, IOException

• type: Class - the Class type for the data type into which ‘value’ is to be converted.
• value: String - JSON string to convert.
• returns: T - converted object value or null when value is null.

toJson

Converts value into a JSON string.

public static String toJson(Object value) throws JsonProcessingException

• value: Object - value to convert.
• returns: String - JSON string or null when value is null.

toMap

Converts JSON string into a map object or returns an empty map when the conversion is not possible. See LongConverter.toNullableLong

public static Map<String, Object> toMap(String value)

• value: String - JSON string to convert.
• returns: Map<String, Object> - Map object value or empty object when the conversion is not supported.

toMapWithDefault

Converts a JSON string into a map object or returns a default value when the conversion is not possible.

public static Map<String, Object> toMapWithDefault(String value, Map<String, Object> defaultValue)

• value: String - JSON string to convert.
• defaultValue: Map<String, Object> - default value.
• returns: Map<String, Object> - Map object or given default when the conversion is not supported.

toNullableMap

Converts a JSON string into a map object or returns null when the conversion is not possible.
See MapConverter.toNullableMap

public static Map<String, Object> toNullableMap(String value)

• value: String - JSON string to convert.
• returns: Map<String, Object> - Map object or null when the conversion is not supported.

Examples

{
  T value1 = JsonConverter.fromJson("{\"key\":123}"); // Result: { key: 123 }
  T value2 = JsonConverter.toMap({ key: 123}); // Result: "{\"key\":123}"
  }