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

Class EmptyArrayParser

java.lang.Object

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

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

All Implemented Interfaces:

ElementParser

Direct Known Subclasses:

EmptyArrayFieldParser

public abstract class EmptyArrayParser
extends AbstractElementParser

Represents an empty array: the case where the parser has seen only [], but no array elements which would indicate the type. Resolves to a specific type upon presentation of the first element. If that element is null, we must still choose a type to record nulls.

This array listener holds no element since none has been created yet; we use this only while we see empty arrays.

Field Summary

Fields

Modifier and Type	Field and Description
protected String	key

Constructor Summary

Constructors

Constructor and Description
EmptyArrayParser(JsonStructureParser structParser, String key)

Method Summary

Modifier and Type	Method and Description
void	parse(TokenIterator tokenizer)
protected abstract ElementParser	resolve(TokenIterator tokenizer) Replace this parser with a new parser based on the current parse context.

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

Field Detail

key

protected final String key

Constructor Detail

EmptyArrayParser

public EmptyArrayParser(JsonStructureParser structParser,
                        String key)

Method Detail

parse

public void parse(TokenIterator tokenizer)

resolve

protected abstract ElementParser resolve(TokenIterator tokenizer)

Replace this parser with a new parser based on the current parse context.