org.apache.druid.java.util.common.parsers

Class JSONFlattenerMaker

java.lang.Object

org.apache.druid.java.util.common.parsers.JSONFlattenerMaker

All Implemented Interfaces:

ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

public class JSONFlattenerMaker
extends Object
implements ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

Constructor Summary

Constructors

Constructor and Description
JSONFlattenerMaker(boolean keepNullValues, boolean discoverNestedFields)

Method Summary

Modifier and Type	Method and Description
static Object	convertJsonNode(com.fasterxml.jackson.databind.JsonNode val, CharsetEncoder enc)
Iterable<String>	discoverRootFields(com.fasterxml.jackson.databind.JsonNode obj) List all "root" fields.
Object	finalizeConversionForMap(Object o) Handle any special conversions for object when translating an input type into a Map for ObjectFlatteners.FlattenerMaker.toMap(T)
com.jayway.jsonpath.spi.json.JsonProvider	getJsonProvider()
Object	getRootField(com.fasterxml.jackson.databind.JsonNode obj, String key) Get a top level field from a "json" object
Function<com.fasterxml.jackson.databind.JsonNode,Object>	makeJsonPathExtractor(String expr) Create a "field" extractor for JsonPath expressions
Function<com.fasterxml.jackson.databind.JsonNode,Object>	makeJsonQueryExtractor(String expr) Create a "field" extractor for 'jq' expressions
Function<com.fasterxml.jackson.databind.JsonNode,Object>	makeJsonTreeExtractor(List<String> nodes) Create a "field" extractor for nested json expressions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.java.util.common.parsers.ObjectFlatteners.FlattenerMaker

toMap, toPlainJavaType

Constructor Detail

JSONFlattenerMaker

public JSONFlattenerMaker(boolean keepNullValues,
                          boolean discoverNestedFields)

Method Detail

discoverRootFields

public Iterable<String> discoverRootFields(com.fasterxml.jackson.databind.JsonNode obj)

Description copied from interface: ObjectFlatteners.FlattenerMaker

List all "root" fields. If DimensionsSpec.useSchemaDiscovery is false, this method should filter fields to include only fields that contain primitive and lists of primitive values

Specified by:

discoverRootFields in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

getRootField

public Object getRootField(com.fasterxml.jackson.databind.JsonNode obj,
                           String key)

Description copied from interface: ObjectFlatteners.FlattenerMaker

Get a top level field from a "json" object

Specified by:

getRootField in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

makeJsonPathExtractor

public Function<com.fasterxml.jackson.databind.JsonNode,Object> makeJsonPathExtractor(String expr)

Description copied from interface: ObjectFlatteners.FlattenerMaker

Create a "field" extractor for JsonPath expressions

Specified by:

makeJsonPathExtractor in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

makeJsonQueryExtractor

public Function<com.fasterxml.jackson.databind.JsonNode,Object> makeJsonQueryExtractor(String expr)

Description copied from interface: ObjectFlatteners.FlattenerMaker

Create a "field" extractor for 'jq' expressions

Specified by:

makeJsonQueryExtractor in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

makeJsonTreeExtractor

public Function<com.fasterxml.jackson.databind.JsonNode,Object> makeJsonTreeExtractor(List<String> nodes)

Description copied from interface: ObjectFlatteners.FlattenerMaker

Create a "field" extractor for nested json expressions

Specified by:

makeJsonTreeExtractor in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

getJsonProvider

public com.jayway.jsonpath.spi.json.JsonProvider getJsonProvider()

Specified by:

getJsonProvider in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

finalizeConversionForMap

public Object finalizeConversionForMap(Object o)

Description copied from interface: ObjectFlatteners.FlattenerMaker

Handle any special conversions for object when translating an input type into a Map for ObjectFlatteners.FlattenerMaker.toMap(T)

Specified by:

finalizeConversionForMap in interface ObjectFlatteners.FlattenerMaker<com.fasterxml.jackson.databind.JsonNode>

convertJsonNode

@Nullable
public static Object convertJsonNode(com.fasterxml.jackson.databind.JsonNode val,
                                               CharsetEncoder enc)