JsonIterator (druid-processing 28.0.0 API)

java.lang.Object
- org.apache.druid.data.input.impl.prefetch.JsonIterator<T>

Type Parameters:

T - the type of object returned by this iterator

All Implemented Interfaces:

Closeable, AutoCloseable, Iterator<T>, CloseableIterator<T>
```
public class JsonIterator<T>
extends Object
implements CloseableIterator<T>
```
An iterator over an array of JSON objects. Uses ObjectCodec to deserialize regular Java objects.

Constructor Summary

Constructors
Constructor	Description
`JsonIterator(com.fasterxml.jackson.core.type.TypeReference<T> typeRef, InputStream inputStream, Closeable resourceCloser, com.fasterxml.jackson.databind.ObjectMapper objectMapper)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`close()`
`boolean`	`hasNext()`	Returns `true` if there are more objects to be read.
`T`	`next()`	Retrieves the next deserialized object from the stream of JSON objects.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.druid.java.util.common.parsers.CloseableIterator
flatMap, map

Methods inherited from interface java.util.Iterator
forEachRemaining, remove

- Constructor Detail
  - JsonIterator
```
public JsonIterator(com.fasterxml.jackson.core.type.TypeReference<T> typeRef,
                    InputStream inputStream,
                    Closeable resourceCloser,
                    com.fasterxml.jackson.databind.ObjectMapper objectMapper)
```
    Parameters:
    
    typeRef - the object type that the JSON object should be deserialized into
    
    inputStream - stream containing an array of JSON objects
    
    resourceCloser - a Closeable implementation to release resources that the object is holding
    
    objectMapper - object mapper, used for deserialization
- Method Detail
  - hasNext
```
public boolean hasNext()
```
    Returns true if there are more objects to be read.
    
    Specified by:
    
    hasNext in interface Iterator<T>
    
    Returns:
    
    true if there are more objects to be read, else return false
  - next
```
public T next()
```
    Retrieves the next deserialized object from the stream of JSON objects.
    
    Specified by:
    
    next in interface Iterator<T>
    
    Returns:
    
    the next deserialized object from the stream of JSON ovbjects
  - close
```
public void close()
           throws IOException
```
    Specified by:
    
    close in interface AutoCloseable
    
    Specified by:
    
    close in interface Closeable
    
    Throws:
    
    IOException