org.dashbuilder.json

Class JsonNull

java.lang.Object

org.dashbuilder.json.JsonNull

All Implemented Interfaces:

JsonValue

public class JsonNull
extends Object
implements JsonValue

Server-side implementation of JsonObject.

Field Summary

Fields

Modifier and Type	Field and Description
static JsonNull	NULL_INSTANCE

Constructor Summary

Constructors

Constructor and Description
JsonNull()

Method Summary

Modifier and Type	Method and Description
boolean	asBoolean() Convert the underlying value to boolean
double	asNumber() Convert the underlying value to a number
String	asString() Convert the underlying value to a String
JsonType	getType() Returns an enumeration representing the fundamental JSON type.
boolean	isEmpty() Check if the json has no value stored.
String	toJson() Returns a serialized JSON string representing this value.
void	traverse(org.dashbuilder.json.JsonVisitor visitor, org.dashbuilder.json.JsonContext ctx) Visitor interface

Methods inherited from class java.lang.Object

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

Field Detail

NULL_INSTANCE

public static final JsonNull NULL_INSTANCE

Constructor Detail

JsonNull

public JsonNull()

Method Detail

isEmpty

public boolean isEmpty()

Description copied from interface: JsonValue

Check if the json has no value stored.

Specified by:

isEmpty in interface JsonValue

asNumber

public double asNumber()

Description copied from interface: JsonValue

Convert the underlying value to a number

Specified by:

asNumber in interface JsonValue

asBoolean

public boolean asBoolean()

Description copied from interface: JsonValue

Convert the underlying value to boolean

Specified by:

asBoolean in interface JsonValue

asString

public String asString()

Description copied from interface: JsonValue

Convert the underlying value to a String

Specified by:

asString in interface JsonValue

getType

public JsonType getType()

Description copied from interface: JsonValue

Returns an enumeration representing the fundamental JSON type.

Specified by:

getType in interface JsonValue

traverse

public void traverse(org.dashbuilder.json.JsonVisitor visitor,
                     org.dashbuilder.json.JsonContext ctx)

Description copied from interface: JsonValue

Visitor interface

Specified by:

traverse in interface JsonValue

toJson

public String toJson()

Description copied from interface: JsonValue

Returns a serialized JSON string representing this value.

Specified by:

toJson in interface JsonValue