com.zackehh.jackson.stream.collectors

Class ObjectNodeCollector

java.lang.Object

com.zackehh.jackson.stream.collectors.ObjectNodeCollector

All Implemented Interfaces:

Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

public class ObjectNodeCollector
extends Object
implements Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

Collector to collect a Stream of JsonNode instance into a new ObjectNode instance. Even though this class could operate on arbitrary types by coercing values into JsonNode instance, it's better to enforce explicitness in pipelines as it raises error handling into the userland layer.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.stream.Collector

Collector.Characteristics

Constructor Summary

Constructors

Constructor and Description
ObjectNodeCollector()

Method Summary

Modifier and Type	Method and Description
BiConsumer<com.fasterxml.jackson.databind.node.ObjectNode,Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>>	accumulator() Returns a BiConsumer which adds a pre-created JsonNode into the ObjectNode instance provided by the Supplier.
Set<Collector.Characteristics>	characteristics() Returns a Set of Characteristics to apply to this Collector.
BinaryOperator<com.fasterxml.jackson.databind.node.ObjectNode>	combiner() Returns an operator which combines two ObjectNode instances by merging all entries from the right instance into the left instance.
Function<com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>	finisher() Returns a Function to identify the input.
Supplier<com.fasterxml.jackson.databind.node.ObjectNode>	supplier() Simply returns a Supplier which creates a new empty ObjectNode instance in order to collect JsonNode values into.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.stream.Collector

of, of

Constructor Detail

ObjectNodeCollector

public ObjectNodeCollector()

Method Detail

supplier

public Supplier<com.fasterxml.jackson.databind.node.ObjectNode> supplier()

Simply returns a Supplier which creates a new empty ObjectNode instance in order to collect JsonNode values into.

Specified by:

supplier in interface Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

accumulator

public BiConsumer<com.fasterxml.jackson.databind.node.ObjectNode,Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>> accumulator()

Returns a BiConsumer which adds a pre-created JsonNode into the ObjectNode instance provided by the Supplier.

Specified by:

accumulator in interface Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

combiner

public BinaryOperator<com.fasterxml.jackson.databind.node.ObjectNode> combiner()

Returns an operator which combines two ObjectNode instances by merging all entries from the right instance into the left instance. This will overwrite any entries in the left with the same key as an entry in the right instance.

Specified by:

combiner in interface Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

finisher

public Function<com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode> finisher()

Returns a Function to identify the input. This is moot and not called due to the provided Characteristics.

Specified by:

finisher in interface Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>

characteristics

public Set<Collector.Characteristics> characteristics()

Returns a Set of Characteristics to apply to this Collector. The only ones provided are that there's an identity finisher and that there is not specific order of the incoming pairs.

Specified by:

characteristics in interface Collector<Map.Entry<String,com.fasterxml.jackson.databind.JsonNode>,com.fasterxml.jackson.databind.node.ObjectNode,com.fasterxml.jackson.databind.node.ObjectNode>