org.apache.druid.segment.nested

Class NestedPathFinder

java.lang.Object

org.apache.druid.segment.nested.NestedPathFinder

public class NestedPathFinder
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	JQ_PATH_ROOT
static String	JSON_PATH_ROOT

Constructor Summary

Constructors

Constructor and Description
NestedPathFinder()

Method Summary

Modifier and Type	Method and Description
static Object	find(Object data, List<NestedPathPart> path) Dig through a thing to find stuff
static Object[]	findKeys(Object data, List<NestedPathPart> path) find the list of 'keys' at some path.
static List<NestedPathPart>	parseJqPath(String path) split a jq path into a series of extractors to find things in stuff
static List<NestedPathPart>	parseJsonPath(String path) split a JSONPath path into a series of extractors to find things in stuff
static String	toNormalizedJqPath(List<NestedPathPart> paths) Given a list of part finders, convert it to a "normalized" 'jq' path format that is consistent with how StructuredDataProcessor constructs field path names
static String	toNormalizedJsonPath(List<NestedPathPart> paths)

Methods inherited from class java.lang.Object

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

Field Detail

JSON_PATH_ROOT

public static final String JSON_PATH_ROOT

See Also:

Constant Field Values

JQ_PATH_ROOT

public static final String JQ_PATH_ROOT

See Also:

Constant Field Values

Constructor Detail

NestedPathFinder

public NestedPathFinder()

Method Detail

find

@Nullable
public static Object find(@Nullable
                                    Object data,
                                    List<NestedPathPart> path)

Dig through a thing to find stuff

findKeys

@Nullable
public static Object[] findKeys(@Nullable
                                          Object data,
                                          List<NestedPathPart> path)

find the list of 'keys' at some path. - if the thing at a path is an object (map), return the fields - if the thing at a path is an array (list or array), return the 0 based element numbers - if the thing is a simple value, return null

toNormalizedJsonPath

public static String toNormalizedJsonPath(List<NestedPathPart> paths)

parseJsonPath

public static List<NestedPathPart> parseJsonPath(@Nullable
                                                 String path)

split a JSONPath path into a series of extractors to find things in stuff

toNormalizedJqPath

public static String toNormalizedJqPath(List<NestedPathPart> paths)

Given a list of part finders, convert it to a "normalized" 'jq' path format that is consistent with how StructuredDataProcessor constructs field path names

parseJqPath

public static List<NestedPathPart> parseJqPath(@Nullable
                                               String path)

split a jq path into a series of extractors to find things in stuff