org.onosproject.ui

Class JsonUtils

java.lang.Object

org.onosproject.ui.JsonUtils

public final class JsonUtils
extends Object

Provides convenience methods for dealing with JSON nodes, arrays etc.

Method Summary

Modifier and Type	Method and Description
static boolean	bool(com.fasterxml.jackson.databind.node.ObjectNode node, String name) Returns the specified node property as a boolean.
static com.fasterxml.jackson.databind.node.ObjectNode	envelope(String type, com.fasterxml.jackson.databind.node.ObjectNode payload) Composes a message structure for the given message type and payload.
static String	eventType(com.fasterxml.jackson.databind.node.ObjectNode event) Returns the event type from the specified event.
static com.fasterxml.jackson.databind.node.ObjectNode	node(com.fasterxml.jackson.databind.node.ObjectNode node, String name) Returns the specified node property as an object node.
static long	number(com.fasterxml.jackson.databind.node.ObjectNode node, String name) Returns the specified node property as a number.
static com.fasterxml.jackson.databind.node.ObjectNode	payload(com.fasterxml.jackson.databind.node.ObjectNode event) Returns the payload from the specified event.
static String	string(com.fasterxml.jackson.databind.node.ObjectNode node, String name) Returns the specified node property as a string.
static String	string(com.fasterxml.jackson.databind.node.ObjectNode node, String name, String defaultValue) Returns the specified node property as a string, with a default fallback.

Methods inherited from class java.lang.Object

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

Method Detail

envelope

public static com.fasterxml.jackson.databind.node.ObjectNode envelope(String type,
                                                                      com.fasterxml.jackson.databind.node.ObjectNode payload)

Composes a message structure for the given message type and payload.

Parameters:

type - message type

payload - message payload

Returns:

the object node representation

eventType

public static String eventType(com.fasterxml.jackson.databind.node.ObjectNode event)

Returns the event type from the specified event. If the node does not have an "event" property, "unknown" is returned.

Parameters:

event - message event

Returns:

extracted event type

payload

public static com.fasterxml.jackson.databind.node.ObjectNode payload(com.fasterxml.jackson.databind.node.ObjectNode event)

Returns the payload from the specified event.

Parameters:

event - message event

Returns:

extracted payload object

number

public static long number(com.fasterxml.jackson.databind.node.ObjectNode node,
                          String name)

Returns the specified node property as a number.

Parameters:

node - object node

name - property name

Returns:

property as number

string

public static String string(com.fasterxml.jackson.databind.node.ObjectNode node,
                            String name)

Returns the specified node property as a string.

Parameters:

node - object node

name - property name

Returns:

property as a string

string

public static String string(com.fasterxml.jackson.databind.node.ObjectNode node,
                            String name,
                            String defaultValue)

Returns the specified node property as a string, with a default fallback.

Parameters:

node - object node

name - property name

defaultValue - fallback value if property is absent

Returns:

property as a string

node

public static com.fasterxml.jackson.databind.node.ObjectNode node(com.fasterxml.jackson.databind.node.ObjectNode node,
                                                                  String name)

Returns the specified node property as an object node.

Parameters:

node - object node

name - property name

Returns:

property as a node

bool

public static boolean bool(com.fasterxml.jackson.databind.node.ObjectNode node,
                           String name)

Returns the specified node property as a boolean.

Parameters:

node - object node

name - property name

Returns:

property as a boolean