Package io.github.spartatech.sqljson.jsonprocessing

Class JsonProcessor

java.lang.Object

io.github.spartatech.sqljson.jsonprocessing.JsonProcessor

public class JsonProcessor
extends Object

Processes the query against given Json and generates de results

Constructor Summary

Constructors

Constructor	Description
JsonProcessor(com.fasterxml.jackson.databind.JsonNode json, JsonQueryClause query, SqlJsonConfig config)	Constructor receiving JSON and query.

Method Summary

Modifier and Type	Method	Description
List<LinkedHashMap<String,com.fasterxml.jackson.databind.JsonNode>>	narrowResultElements(List<com.fasterxml.jackson.databind.JsonNode> elements)	Return the selected columns.
JsonResultSet	process()	Main processor method.

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonProcessor

public JsonProcessor(com.fasterxml.jackson.databind.JsonNode json,
                     JsonQueryClause query,
                     SqlJsonConfig config)

Constructor receiving JSON and query.

Parameters:

json - json to be queried

query - SQL to be executed

Method Detail

process

public JsonResultSet process()
                      throws Exception

Main processor method.

Returns:

List of results found

Throws:

Exception - in case of any failure

narrowResultElements

public List<LinkedHashMap<String,com.fasterxml.jackson.databind.JsonNode>> narrowResultElements(List<com.fasterxml.jackson.databind.JsonNode> elements)
                                                                                               throws SQLSyntaxErrorException

Return the selected columns. Star will return all fields . (dot) will return a json

Parameters:

elements - all elements to filter columns

Returns:

List rows, where rows are a map of cols

Throws:

SQLSyntaxErrorException - in case selectors are invalid