org.apache.drill.exec.store.easy.json.parser

Class ArrayParser

java.lang.Object

org.apache.drill.exec.store.easy.json.parser.AbstractElementParser

org.apache.drill.exec.store.easy.json.parser.ArrayParser

All Implemented Interfaces:

ElementParser

public class ArrayParser
extends AbstractElementParser

Parses a JSON array, which consists of a list of elements, represented by a ValueListener. There is a single listener for all the elements, which are presumed to be of the same type.

The element is created when first encountered, either as part of field creation ({a: [10]}) or when later encountered in parsing ().

This parser does not attempt to parse an array as a poor-man's tuple: [ 101, "fred", 23.45 ]. The listener could handle this case. But, if we need to handle such a case, it would be better to create a new parser for that case, with an element listener per element as is done for objects.

Constructor Summary

Constructors

Constructor and Description
ArrayParser(JsonStructureParser structParser, ArrayListener arrayListener, ElementParser elementParser)

Method Summary

Modifier and Type	Method and Description
ElementParser	elementParser()
<T extends ArrayListener> T	listener()
void	parse(TokenIterator tokenizer) Parses [ ^ ((value)(, (value)* )? ]

Methods inherited from class org.apache.drill.exec.store.easy.json.parser.AbstractElementParser

errorFactory, structParser

Methods inherited from class java.lang.Object

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

Constructor Detail

ArrayParser

public ArrayParser(JsonStructureParser structParser,
                   ArrayListener arrayListener,
                   ElementParser elementParser)

Method Detail

elementParser

public ElementParser elementParser()

listener

public <T extends ArrayListener> T listener()

parse

public void parse(TokenIterator tokenizer)

Parses [ ^ ((value)(, (value)* )? ]