Package org.eclipse.ditto.json

Class JsonCollectors

java.lang.Object

org.eclipse.ditto.json.JsonCollectors

@Immutable
public final class JsonCollectors
extends Object

This class provides implementations of Collector that implement various useful reduction operations, such as accumulating JSON fields into JSON objects etc.

Method Summary

Modifier and Type	Method	Description
static Collector<JsonField,JsonArrayBuilder,JsonArray>	fieldKeysToArray()	Returns a Collector that accumulates the key names of input JSON fields into a new JsonArray.
static Collector<JsonField,JsonObjectBuilder,JsonObject>	fieldsToObject()	Returns a Collector that accumulates the input JSON fields into a new JsonObject.
static Collector<JsonField,JsonArrayBuilder,JsonArray>	fieldValuesToArray()	Returns a Collector that accumulates the values of input JSON fields into a new JsonArray.
static Collector<JsonObject,JsonObjectBuilder,JsonObject>	objectsToObject()	Returns a Collector that accumulates the input JSON objects into a new JsonObject.
static Collector<JsonValue,JsonArrayBuilder,JsonArray>	valuesToArray()	Returns a Collector that accumulates the input JSON values into a new JsonArray.

Methods inherited from class java.lang.Object

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

Method Details

fieldsToObject

public static Collector<JsonField,JsonObjectBuilder,JsonObject> fieldsToObject()

Returns a Collector that accumulates the input JSON fields into a new JsonObject.

Returns:

a Collector which collects all the JSON fields into a JsonObject, in encounter order.

objectsToObject

public static Collector<JsonObject,JsonObjectBuilder,JsonObject> objectsToObject()

Returns a Collector that accumulates the input JSON objects into a new JsonObject.

Returns:

a Collector which collects all the JSON object into a JsonObject, in encounter order.

fieldKeysToArray

public static Collector<JsonField,JsonArrayBuilder,JsonArray> fieldKeysToArray()

Returns a Collector that accumulates the key names of input JSON fields into a new JsonArray. The values are hereby dismissed.

Returns:

a Collector which collects the key names of all the JSON fields into a JsonArray, in encounter order.

fieldValuesToArray

public static Collector<JsonField,JsonArrayBuilder,JsonArray> fieldValuesToArray()

Returns a Collector that accumulates the values of input JSON fields into a new JsonArray. The keys are hereby dismissed.

Caution: Due to the fact that each field of a JSON object can have a different type the resulting array will also consist of values of different types!

Returns:

a Collector which collects the values of all the JSON fields into a JsonArray, in encounter order.

valuesToArray

public static Collector<JsonValue,JsonArrayBuilder,JsonArray> valuesToArray()

Returns a Collector that accumulates the input JSON values into a new JsonArray.

Returns:

a Collector which collects all the JSON values into a JsonArray, in encounter order.