org.apache.hadoop.hive.serde2.json

Class HiveJsonReader

java.lang.Object

org.apache.hadoop.hive.serde2.json.HiveJsonReader

public class HiveJsonReader
extends Object

This class converts JSON strings into Java or Hive Primitive objects. Support types are:

JSON Type	Java Type	Notes
Object	java.util.List	Each element may be different type
Array	java.util.List	Each element is same type
Map	java.util.Map	Keys must be same primitive type; every value is the same type

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	HiveJsonReader.Feature Enumeration that defines all on/off features for this reader.

Constructor Summary

Constructors

Constructor and Description
HiveJsonReader(ObjectInspector oi) Constructor with default the Hive default timestamp parser.
HiveJsonReader(ObjectInspector oi, TimestampParser tsParser) Constructor with default the Hive default timestamp parser.

Method Summary

Modifier and Type	Method and Description
void	disable(HiveJsonReader.Feature feature)
void	enable(HiveJsonReader.Feature feature)
BinaryEncoding	getBinaryEncodingType()
Set<HiveJsonReader.Feature>	getFeatures()
ObjectInspector	getObjectInspector()
boolean	isEnabled(HiveJsonReader.Feature feature)
Object	parseStruct(InputStream in) Parse text containing a complete JSON object.
Object	parseStruct(String text) Parse text containing a complete JSON object.
void	setBinaryEncoding(BinaryEncoding encoding)
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

HiveJsonReader

public HiveJsonReader(ObjectInspector oi)

Constructor with default the Hive default timestamp parser.

Parameters:

oi - ObjectInspector for all the fields in the JSON object

HiveJsonReader

public HiveJsonReader(ObjectInspector oi,
                      TimestampParser tsParser)

Constructor with default the Hive default timestamp parser.

Parameters:

oi - ObjectInspector info for all the fields in the JSON object

tsParser - Custom timestamp parser

Method Detail

parseStruct

public Object parseStruct(String text)
                   throws IOException,
                          SerDeException

Parse text containing a complete JSON object.

Parameters:

text - The text to parse

Returns:

A List of Objects, one for each field in the JSON object

Throws:

IOException - Unable to parse the JSON text

SerDeException - The SerDe is not configured correctly

parseStruct

public Object parseStruct(InputStream in)
                   throws IOException,
                          SerDeException

Parse text containing a complete JSON object.

Parameters:

in - The InputStream to read the text from

Returns:

A List of Objects, one for each field in the JSON object

Throws:

IOException - Unable to parse the JSON text

SerDeException - The SerDe is not configured correctly

enable

public void enable(HiveJsonReader.Feature feature)

disable

public void disable(HiveJsonReader.Feature feature)

getFeatures

public Set<HiveJsonReader.Feature> getFeatures()

isEnabled

public boolean isEnabled(HiveJsonReader.Feature feature)

getObjectInspector

public ObjectInspector getObjectInspector()

getBinaryEncodingType

public BinaryEncoding getBinaryEncodingType()

setBinaryEncoding

public void setBinaryEncoding(BinaryEncoding encoding)

toString

public String toString()

Overrides:

toString in class Object