io.vertx.core.json

Class JsonObject

java.lang.Object

io.vertx.core.json.JsonObject

All Implemented Interfaces:

io.vertx.core.shareddata.impl.ClusterSerializable, Shareable, Iterable<Map.Entry<String,Object>>

public class JsonObject
extends Object
implements Iterable<Map.Entry<String,Object>>, ClusterSerializable, Shareable

A representation of a JSON object in Java. Unlike some other languages Java does not have a native understanding of JSON. To enable JSON to be used easily in Vert.x code we use this class to encapsulate the notion of a JSON object. The implementation adheres to the RFC-7493 to support Temporal data types as well as binary data. Please see the documentation for more information.

Author:

Tim Fox

Constructor Summary

Constructors

Constructor and Description
JsonObject() Create a new, empty instance
JsonObject(Buffer buf) Create an instance from a buffer.
JsonObject(Map<String,Object> map) Create an instance from a Map.
JsonObject(String json) Create an instance from a string of JSON

Method Summary

Modifier and Type	Method and Description
JsonObject	clear() Remove all the entries in this JSON object
boolean	containsKey(String key) Does the JSON object contain the specified key?
JsonObject	copy() Deep copy of this JSON object.
JsonObject	copy(java.util.function.Function<Object,?> cloner) Deep copy of this JSON object.
String	encode() Encode this JSON object as a string.
String	encodePrettily() Encode this JSON object a a string, with whitespace to make the object easier to read by a human, or other sentient organism.
boolean	equals(Object o)
Set<String>	fieldNames() Return the set of field names in the JSON objects
byte[]	getBinary(String key) Get the binary value with the specified key.
byte[]	getBinary(String key, byte[] def) Like getBinary(String) but specifying a default value to return if there is no entry.
Boolean	getBoolean(String key) Get the Boolean value with the specified key
Boolean	getBoolean(String key, Boolean def) Like getBoolean(String) but specifying a default value to return if there is no entry.
Buffer	getBuffer(String key) Get the Buffer value with the specified key.
Buffer	getBuffer(String key, Buffer def) Like getBuffer(String) but specifying a default value to return if there is no entry.
Double	getDouble(String key) Get the Double value with the specified key
Double	getDouble(String key, Double def) Like getDouble(String) but specifying a default value to return if there is no entry.
Float	getFloat(String key) Get the Float value with the specified key
Float	getFloat(String key, Float def) Like getFloat(String) but specifying a default value to return if there is no entry.
java.time.Instant	getInstant(String key) Get the instant value with the specified key.
java.time.Instant	getInstant(String key, java.time.Instant def) Like getInstant(String) but specifying a default value to return if there is no entry.
Integer	getInteger(String key) Get the Integer value with the specified key
Integer	getInteger(String key, Integer def) Like getInteger(String) but specifying a default value to return if there is no entry.
JsonArray	getJsonArray(String key) Get the JsonArray value with the specified key
JsonArray	getJsonArray(String key, JsonArray def) Like getJsonArray(String) but specifying a default value to return if there is no entry.
JsonObject	getJsonObject(String key) Get the JsonObject value with the specified key
JsonObject	getJsonObject(String key, JsonObject def) Like getJsonObject(String) but specifying a default value to return if there is no entry.
Long	getLong(String key) Get the Long value with the specified key
Long	getLong(String key, Long def) Like getLong(String) but specifying a default value to return if there is no entry.
Map<String,Object>	getMap() Get the underlying Map as is.
Number	getNumber(String key) Get the Number value with the specified key
Number	getNumber(String key, Number def) Like getNumber(String) but specifying a default value to return if there is no entry.
String	getString(String key) Get the string value with the specified key, special cases are addressed for extended JSON types Instant, byte[] and Enum which can be converted to String.
String	getString(String key, String def) Like getString(String) but specifying a default value to return if there is no entry.
Object	getValue(String key) Get the value with the specified key, as an Object with types respecting the limitations of JSON.
Object	getValue(String key, Object def) Like getValue(String) but specifying a default value to return if there is no entry.
int	hashCode()
boolean	isEmpty() Is this object entry?
Iterator<Map.Entry<String,Object>>	iterator() Get an Iterator of the entries in the JSON object.
static JsonObject	mapFrom(Object obj) Create a JsonObject from the fields of a Java object.
<T> T	mapTo(Class<T> type) Instantiate a Java object from a JsonObject.
JsonObject	mergeIn(JsonObject other) Merge in another JSON object.
JsonObject	mergeIn(JsonObject other, boolean deep) Merge in another JSON object.
JsonObject	mergeIn(JsonObject other, int depth) Merge in another JSON object.
static JsonObject	of() Create a JsonObject containing zero mappings.
static JsonObject	of(String k1, Object v1) Create a JsonObject containing a single mapping.
static JsonObject	of(String k1, Object v1, String k2, Object v2) Create a JsonObject containing two mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3) Create a JsonObject containing three mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4) Create a JsonObject containing four mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5) Create a JsonObject containing five mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5, String k6, Object v6) Create a JsonObject containing six mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5, String k6, Object v6, String k7, Object v7) Create a JsonObject containing seven mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5, String k6, Object v6, String k7, Object v7, String k8, Object v8) Create a JsonObject containing eight mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5, String k6, Object v6, String k7, Object v7, String k8, Object v8, String k9, Object v9) Create a JsonObject containing nine mappings.
static JsonObject	of(String k1, Object v1, String k2, Object v2, String k3, Object v3, String k4, Object v4, String k5, Object v5, String k6, Object v6, String k7, Object v7, String k8, Object v8, String k9, Object v9, String k10, Object v10) Create a JsonObject containing ten mappings.
JsonObject	put(String key, Object value) Put an Object into the JSON object with the specified key.
JsonObject	putNull(String key) Put a null value into the JSON object with the specified key.
int	readFromBuffer(int pos, Buffer buffer) Method invoked when deserializing bytes to this instance.
Object	remove(String key) Remove an entry from this object.
int	size() Get the number of entries in the JSON object
java.util.stream.Stream<Map.Entry<String,Object>>	stream() Get a Stream over the entries in the JSON object.
Buffer	toBuffer() Encode this JSON object as buffer.
String	toString()
void	writeToBuffer(Buffer buffer) Method invoked when serializing this instance.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Constructor Detail

JsonObject

public JsonObject(String json)

Create an instance from a string of JSON

Parameters:

json - the string of JSON

JsonObject

public JsonObject()

Create a new, empty instance

JsonObject

public JsonObject(Map<String,Object> map)

Create an instance from a Map. The Map is not copied.

Parameters:

map - the map to create the instance from.

JsonObject

public JsonObject(Buffer buf)

Create an instance from a buffer.

Parameters:

buf - the buffer to create the instance from.

Method Detail

of

public static JsonObject of()

Create a JsonObject containing zero mappings.

Returns:

an empty JsonObject.

of

public static JsonObject of(String k1,
                            Object v1)

Create a JsonObject containing a single mapping.

Parameters:

k1 - the mapping's key

v1 - the mapping's value

Returns:

a JsonObject containing the specified mapping.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2)

Create a JsonObject containing two mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3)

Create a JsonObject containing three mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4)

Create a JsonObject containing four mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5)

Create a JsonObject containing five mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5,
                            String k6,
                            Object v6)

Create a JsonObject containing six mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

k6 - the sixth mapping's key

v6 - the sixth mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5,
                            String k6,
                            Object v6,
                            String k7,
                            Object v7)

Create a JsonObject containing seven mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

k6 - the sixth mapping's key

v6 - the sixth mapping's value

k7 - the seventh mapping's key

v7 - the seventh mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5,
                            String k6,
                            Object v6,
                            String k7,
                            Object v7,
                            String k8,
                            Object v8)

Create a JsonObject containing eight mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

k6 - the sixth mapping's key

v6 - the sixth mapping's value

k7 - the seventh mapping's key

v7 - the seventh mapping's value

k8 - the eighth mapping's key

v8 - the eighth mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5,
                            String k6,
                            Object v6,
                            String k7,
                            Object v7,
                            String k8,
                            Object v8,
                            String k9,
                            Object v9)

Create a JsonObject containing nine mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

k6 - the sixth mapping's key

v6 - the sixth mapping's value

k7 - the seventh mapping's key

v7 - the seventh mapping's value

k8 - the eighth mapping's key

v8 - the eighth mapping's value

k9 - the ninth mapping's key

v9 - the ninth mapping's value

Returns:

a JsonObject containing the specified mappings.

of

public static JsonObject of(String k1,
                            Object v1,
                            String k2,
                            Object v2,
                            String k3,
                            Object v3,
                            String k4,
                            Object v4,
                            String k5,
                            Object v5,
                            String k6,
                            Object v6,
                            String k7,
                            Object v7,
                            String k8,
                            Object v8,
                            String k9,
                            Object v9,
                            String k10,
                            Object v10)

Create a JsonObject containing ten mappings.

Parameters:

k1 - the first mapping's key

v1 - the first mapping's value

k2 - the second mapping's key

v2 - the second mapping's value

k3 - the third mapping's key

v3 - the third mapping's value

k4 - the fourth mapping's key

v4 - the fourth mapping's value

k5 - the fifth mapping's key

v5 - the fifth mapping's value

k6 - the sixth mapping's key

v6 - the sixth mapping's value

k7 - the seventh mapping's key

v7 - the seventh mapping's value

k8 - the eighth mapping's key

v8 - the eighth mapping's value

k9 - the ninth mapping's key

v9 - the ninth mapping's value

k10 - the tenth mapping's key

v10 - the tenth mapping's value

Returns:

a JsonObject containing the specified mappings.

mapFrom

public static JsonObject mapFrom(Object obj)

Create a JsonObject from the fields of a Java object. Faster than calling `new JsonObject(Json.encode(obj))`.

null when obj is null.

Parameters:

obj - The object to convert to a JsonObject.

Throws:

IllegalArgumentException - if conversion fails due to an incompatible type.

mapTo

public <T> T mapTo(Class<T> type)

Instantiate a Java object from a JsonObject. Faster than calling `Json.decodeValue(Json.encode(jsonObject), type)`.

Parameters:

type - The type to instantiate from the JsonObject.

Throws:

IllegalArgumentException - if the type cannot be instantiated.

getString

public String getString(String key)

Get the string value with the specified key, special cases are addressed for extended JSON types Instant, byte[] and Enum which can be converted to String.

Parameters:

key - the key to return the value for

Returns:

the value string representation or null if no value for that key

getNumber

public Number getNumber(String key)

Get the Number value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a Number

getInteger

public Integer getInteger(String key)

Get the Integer value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not an Integer

getLong

public Long getLong(String key)

Get the Long value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a Long

getDouble

public Double getDouble(String key)

Get the Double value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a Double

getFloat

public Float getFloat(String key)

Get the Float value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a Float

getBoolean

public Boolean getBoolean(String key)

Get the Boolean value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a Boolean

getJsonObject

public JsonObject getJsonObject(String key)

Get the JsonObject value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a JsonObject

getJsonArray

public JsonArray getJsonArray(String key)

Get the JsonArray value with the specified key

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a JsonArray

getBinary

public byte[] getBinary(String key)

Get the binary value with the specified key.

JSON itself has no notion of a binary, this extension complies to the RFC-7493, so this method assumes there is a String value with the key and it contains a Base64 encoded binary, which it decodes if found and returns.

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a String

IllegalArgumentException - if the String value is not a legal Base64 encoded value

getBuffer

public Buffer getBuffer(String key)

Get the Buffer value with the specified key.

JSON itself has no notion of a binary, this extension complies to the RFC-7493, so this method assumes there is a String value with the key and it contains a Base64 encoded binary, which it decodes if found and returns.

Parameters:

key - the string to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a string

IllegalArgumentException - if the value is not a legal Base64 encoded string

getInstant

public java.time.Instant getInstant(String key)

Get the instant value with the specified key.

JSON itself has no notion of a temporal types, this extension allows ISO 8601 string formatted dates with timezone always set to zero UTC offset, as denoted by the suffix "Z" to be parsed as a instant value. YYYY-MM-DDTHH:mm:ss.sssZ is the default format used by web browser scripting. This extension complies to the RFC-7493 with all the restrictions mentioned before. The method will then decode and return a instant value.

Parameters:

key - the key to return the value for

Returns:

the value or null if no value for that key

Throws:

ClassCastException - if the value is not a String

java.time.format.DateTimeParseException - if the String value is not a legal ISO 8601 encoded value

getValue

public Object getValue(String key)

Get the value with the specified key, as an Object with types respecting the limitations of JSON.

• Map will be wrapped to JsonObject
• List will be wrapped to JsonArray
• Instant will be converted to String
• byte[] will be converted to String
• Enum will be converted to String

Parameters:

key - the key to lookup

Returns:

the value

getString

public String getString(String key,
                        String def)

Like getString(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getNumber

public Number getNumber(String key,
                        Number def)

Like getNumber(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getInteger

public Integer getInteger(String key,
                          Integer def)

Like getInteger(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getLong

public Long getLong(String key,
                    Long def)

Like getLong(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getDouble

public Double getDouble(String key,
                        Double def)

Like getDouble(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getFloat

public Float getFloat(String key,
                      Float def)

Like getFloat(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getBoolean

public Boolean getBoolean(String key,
                          Boolean def)

Like getBoolean(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getJsonObject

public JsonObject getJsonObject(String key,
                                JsonObject def)

Like getJsonObject(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getJsonArray

public JsonArray getJsonArray(String key,
                              JsonArray def)

Like getJsonArray(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getBinary

public byte[] getBinary(String key,
                        byte[] def)

Like getBinary(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getBuffer

public Buffer getBuffer(String key,
                        Buffer def)

Like getBuffer(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getInstant

public java.time.Instant getInstant(String key,
                                    java.time.Instant def)

Like getInstant(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

getValue

public Object getValue(String key,
                       Object def)

Like getValue(String) but specifying a default value to return if there is no entry.

Parameters:

key - the key to lookup

def - the default value to use if the entry is not present

Returns:

the value or def if no entry present

containsKey

public boolean containsKey(String key)

Does the JSON object contain the specified key?

Parameters:

key - the key

Returns:

true if it contains the key, false if not.

fieldNames

public Set<String> fieldNames()

Return the set of field names in the JSON objects

Returns:

the set of field names

putNull

public JsonObject putNull(String key)

Put a null value into the JSON object with the specified key.

Parameters:

key - the key

Returns:

a reference to this, so the API can be used fluently

put

public JsonObject put(String key,
                      Object value)

Put an Object into the JSON object with the specified key.

Parameters:

key - the key

value - the value

Returns:

a reference to this, so the API can be used fluently

remove

public Object remove(String key)

Remove an entry from this object.

Parameters:

key - the key

Returns:

the value that was removed, or null if none

mergeIn

public JsonObject mergeIn(JsonObject other)

Merge in another JSON object.

This is the equivalent of putting all the entries of the other JSON object into this object. This is not a deep merge, entries containing (sub) JSON objects will be replaced entirely.

Parameters:

other - the other JSON object

Returns:

a reference to this, so the API can be used fluently

mergeIn

public JsonObject mergeIn(JsonObject other,
                          boolean deep)

Merge in another JSON object. A deep merge (recursive) matches (sub) JSON objects in the existing tree and replaces all matching entries. JsonArrays are treated like any other entry, i.e. replaced entirely.

Parameters:

other - the other JSON object

deep - if true, a deep merge is performed

Returns:

a reference to this, so the API can be used fluently

mergeIn

public JsonObject mergeIn(JsonObject other,
                          int depth)

Merge in another JSON object. The merge is deep (recursive) to the specified level. If depth is 0, no merge is performed, if depth is greater than the depth of one of the objects, a full deep merge is performed.

Parameters:

other - the other JSON object

depth - depth of merge

Returns:

a reference to this, so the API can be used fluently

encode

public String encode()

Encode this JSON object as a string.

Returns:

the string encoding.

encodePrettily

public String encodePrettily()

Encode this JSON object a a string, with whitespace to make the object easier to read by a human, or other sentient organism.

Returns:

the pretty string encoding.

toBuffer

public Buffer toBuffer()

Encode this JSON object as buffer.

Returns:

the buffer encoding.

copy

public JsonObject copy()

Deep copy of this JSON object.

Specified by:

copy in interface Shareable

Returns:

a copy where all elements have been copied recursively

Throws:

IllegalStateException - when a nested element cannot be copied

copy

public JsonObject copy(java.util.function.Function<Object,?> cloner)

Deep copy of this JSON object.

Unlike copy() that can fail when an unknown element cannot be copied, this method delegates the copy of such element to the cloner function and will not fail.

Parameters:

cloner - a function that copies custom values not supported by the JSON implementation

Returns:

a copy where all elements have been copied recursively

getMap

public Map<String,Object> getMap()

Get the underlying Map as is.

This map may contain values that are not the types returned by the JsonObject and with an unpredictable representation of the value, e.g you might get a JSON object as a JsonObject or as a Map.

Returns:

the underlying Map.

stream

public java.util.stream.Stream<Map.Entry<String,Object>> stream()

Get a Stream over the entries in the JSON object. The values in the stream will follow the same rules as defined in getValue(String), respecting the JSON requirements.

To stream the raw values, use the storage object stream instead:

   jsonObject
     .getMap()
     .stream()
 

Returns:

a Stream

iterator

public Iterator<Map.Entry<String,Object>> iterator()

Get an Iterator of the entries in the JSON object.

Specified by:

iterator in interface Iterable<Map.Entry<String,Object>>

Returns:

an Iterator of the entries

size

public int size()

Get the number of entries in the JSON object

Returns:

the number of entries

clear

public JsonObject clear()

Remove all the entries in this JSON object

isEmpty

public boolean isEmpty()

Is this object entry?

Returns:

true if it has zero entries, false if not.

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

writeToBuffer

public void writeToBuffer(Buffer buffer)

Description copied from interface: ClusterSerializable

Method invoked when serializing this instance.

Specified by:

writeToBuffer in interface io.vertx.core.shareddata.impl.ClusterSerializable

Parameters:

buffer - the Buffer where the serialized bytes must be written to

readFromBuffer

public int readFromBuffer(int pos,
                          Buffer buffer)

Description copied from interface: ClusterSerializable

Method invoked when deserializing bytes to this instance.

Specified by:

readFromBuffer in interface io.vertx.core.shareddata.impl.ClusterSerializable

Parameters:

pos - the position where to start reading the buffer

buffer - the Buffer where the serialized bytes must be read from

Returns:

the position after the last serialized byte