Package org.apache.calcite.adapter.elasticsearch

Class ElasticsearchEnumerators

java.lang.Object

org.apache.calcite.adapter.elasticsearch.ElasticsearchEnumerators

class ElasticsearchEnumerators
extends java.lang.Object

Util functions which convert ElasticsearchJson.SearchHit into calcite specific return type (map, object[], list etc.)

Constructor Summary

Constructors

Modifier	Constructor	Description
private	ElasticsearchEnumerators()

Method Summary

Modifier and Type	Method	Description
private static java.lang.Object	convert(java.lang.Object o, java.lang.Class clazz)
(package private) static Function1<ElasticsearchJson.SearchHit,java.lang.Object>	getter(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.Class>> fields)
private static Function1<ElasticsearchJson.SearchHit,java.lang.Object[]>	listGetter(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.Class>> fields)	Function that extracts a given set of fields from elastic search result objects.
private static Function1<ElasticsearchJson.SearchHit,java.util.Map>	mapGetter()
private static Function1<ElasticsearchJson.SearchHit,java.lang.Object>	singletonGetter(java.lang.String fieldName, java.lang.Class fieldClass)

Methods inherited from class java.lang.Object

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

Constructor Detail

ElasticsearchEnumerators

private ElasticsearchEnumerators()

Method Detail

mapGetter

private static Function1<ElasticsearchJson.SearchHit,java.util.Map> mapGetter()

singletonGetter

private static Function1<ElasticsearchJson.SearchHit,java.lang.Object> singletonGetter(java.lang.String fieldName,
                                                                                             java.lang.Class fieldClass)

listGetter

private static Function1<ElasticsearchJson.SearchHit,java.lang.Object[]> listGetter(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.Class>> fields)

Function that extracts a given set of fields from elastic search result objects.

Parameters:

fields - List of fields to project

Returns:

function that converts the search result into a generic array

getter

static Function1<ElasticsearchJson.SearchHit,java.lang.Object> getter(java.util.List<java.util.Map.Entry<java.lang.String,java.lang.Class>> fields)

convert

private static java.lang.Object convert(java.lang.Object o,
                                        java.lang.Class clazz)