com.datastrato.gravitino.json

Class JsonUtils

java.lang.Object

com.datastrato.gravitino.json.JsonUtils

public class JsonUtils
extends java.lang.Object

Utility class for working with JSON data.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	JsonUtils.ColumnPositionDeserializer
static class	JsonUtils.ColumnPositionSerializer
static class	JsonUtils.DistributionDeserializer
static class	JsonUtils.DistributionSerializer
static class	JsonUtils.NameIdentifierDeserializer Custom JSON deserializer for NameIdentifier objects.
static class	JsonUtils.NameIdentifierSerializer Custom JSON serializer for NameIdentifier objects.
static class	JsonUtils.PartitioningDeserializer
static class	JsonUtils.PartitioningSerializer
static class	JsonUtils.SortOrderDeserializer
static class	JsonUtils.SortOrderSerializer
static class	JsonUtils.TypeDeserializer Custom JSON deserializer for Gravitino Type objects.
static class	JsonUtils.TypeSerializer Custom JSON serializer for Gravitino Type objects.

Constructor Summary

Constructors

Constructor and Description
JsonUtils()

Method Summary

Modifier and Type	Method and Description
static int	getInt(java.lang.String property, com.fasterxml.jackson.databind.JsonNode node)
static long	getLong(java.lang.String property, com.fasterxml.jackson.databind.JsonNode node)
static java.lang.String	getString(java.lang.String property, com.fasterxml.jackson.databind.JsonNode node) Get a string value from a JSON node property.
static java.lang.String[]	getStringArray(com.fasterxml.jackson.databind.node.ArrayNode node)
static java.util.List<java.lang.String>	getStringList(java.lang.String property, com.fasterxml.jackson.databind.JsonNode node) Get a list of strings from a JSON node property or throw an exception if the property is missing.
static java.util.List<java.lang.String>	getStringListOrNull(java.lang.String property, com.fasterxml.jackson.databind.JsonNode node) Get a list of strings from a JSON node property.
static com.fasterxml.jackson.databind.ObjectMapper	objectMapper() Get the shared ObjectMapper instance for JSON serialization/deserialization.
static FunctionArg	readFunctionArg(com.fasterxml.jackson.databind.JsonNode node)
static void	writeFunctionArg(FunctionArg arg, com.fasterxml.jackson.core.JsonGenerator gen)

Methods inherited from class java.lang.Object

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

Constructor Detail

JsonUtils

public JsonUtils()

Method Detail

objectMapper

public static com.fasterxml.jackson.databind.ObjectMapper objectMapper()

Get the shared ObjectMapper instance for JSON serialization/deserialization.

Returns:

The ObjectMapper instance.

getStringListOrNull

public static java.util.List<java.lang.String> getStringListOrNull(java.lang.String property,
                                                                   com.fasterxml.jackson.databind.JsonNode node)

Get a list of strings from a JSON node property.

Parameters:

property - The property name.

node - The JSON node.

Returns:

The list of strings or null if property is missing or null.

getStringList

public static java.util.List<java.lang.String> getStringList(java.lang.String property,
                                                             com.fasterxml.jackson.databind.JsonNode node)

Get a list of strings from a JSON node property or throw an exception if the property is missing.

Parameters:

property - The property name.

node - The JSON node.

Returns:

The list of strings.

Throws:

java.lang.IllegalArgumentException - if the property is missing in the JSON node.

getStringArray

public static java.lang.String[] getStringArray(com.fasterxml.jackson.databind.node.ArrayNode node)

getInt

public static int getInt(java.lang.String property,
                         com.fasterxml.jackson.databind.JsonNode node)

getLong

public static long getLong(java.lang.String property,
                           com.fasterxml.jackson.databind.JsonNode node)

readFunctionArg

public static FunctionArg readFunctionArg(com.fasterxml.jackson.databind.JsonNode node)

writeFunctionArg

public static void writeFunctionArg(FunctionArg arg,
                                    com.fasterxml.jackson.core.JsonGenerator gen)
                             throws java.io.IOException

Throws:

java.io.IOException

getString

public static java.lang.String getString(java.lang.String property,
                                         com.fasterxml.jackson.databind.JsonNode node)

Get a string value from a JSON node property.

Parameters:

property - The property name.

node - The JSON node.

Returns:

The string value.

Throws:

java.lang.IllegalArgumentException - if the property is missing in the JSON node.