Module com.grack.nanojson

Package com.grack.nanojson

Class JsonObject

java.lang.Object

java.util.AbstractMap<String,Object>

java.util.HashMap<String,Object>

java.util.LinkedHashMap<String,Object>

com.grack.nanojson.JsonObject

All Implemented Interfaces:

Serializable, Cloneable, Map<String,Object>, SequencedMap<String,Object>

public class JsonObject
extends LinkedHashMap<String,Object>

Extends a LinkedHashMap with helper methods to determine the underlying JSON type of the map element.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Constructor Summary

Constructors

Constructor	Description
JsonObject()	Creates an empty JsonObject with the default capacity.
JsonObject(int initialCapacity)	Creates a JsonObject with the given initial capacity.
JsonObject(int initialCapacity, float loadFactor)	Creates a JsonObject with the given initial capacity and load factor.
JsonObject(Map<? extends String,?> map)	Creates a JsonObject from an existing Map.

Method Summary

Modifier and Type	Method	Description
static JsonBuilder<JsonObject>	builder()	Creates a JsonBuilder for a JsonObject.
JsonArray	getArray(String key)	Returns the JsonArray at the given key, or null if it does not exist or is the wrong type.
JsonArray	getArray(String key, JsonArray default_)	Returns the JsonArray at the given key, or the default if it does not exist or is the wrong type.
boolean	getBoolean(String key)	Returns the Boolean at the given key, or false if it does not exist or is the wrong type.
boolean	getBoolean(String key, Boolean default_)	Returns the Boolean at the given key, or the default if it does not exist or is the wrong type.
double	getDouble(String key)	Returns the Double at the given key, or 0.0 if it does not exist or is the wrong type.
double	getDouble(String key, double default_)	Returns the Double at the given key, or the default if it does not exist or is the wrong type.
float	getFloat(String key)	Returns the Float at the given key, or 0.0f if it does not exist or is the wrong type.
float	getFloat(String key, float default_)	Returns the Float at the given key, or the default if it does not exist or is the wrong type.
int	getInt(String key)	Returns the Integer at the given key, or 0 if it does not exist or is the wrong type.
int	getInt(String key, int default_)	Returns the Integer at the given key, or the default if it does not exist or is the wrong type.
long	getLong(String key)	Returns the Long at the given key, or 0 if it does not exist or is the wrong type.
long	getLong(String key, long default_)	Returns the Long at the given key, or the default if it does not exist or is the wrong type.
Number	getNumber(String key)	Returns the Number at the given key, or null if it does not exist or is the wrong type.
Number	getNumber(String key, Number default_)	Returns the Number at the given key, or the default if it does not exist or is the wrong type.
JsonObject	getObject(String key)	Returns the JsonObject at the given key, or null if it does not exist or is the wrong type.
JsonObject	getObject(String key, JsonObject default_)	Returns the JsonObject at the given key, or the default if it does not exist or is the wrong type.
String	getString(String key)	Returns the String at the given key, or null if it does not exist or is the wrong type.
String	getString(String key, String default_)	Returns the String at the given key, or the default if it does not exist or is the wrong type.
boolean	has(String key)	Returns true if the object has an element at that key (even if that element is null).
boolean	isBoolean(String key)	Returns true if the object has a boolean element at that key.
boolean	isNull(String key)	Returns true if the object has a null element at that key.
boolean	isNumber(String key)	Returns true if the object has a number element at that key.
boolean	isString(String key)	Returns true if the object has a string element at that key.

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, newLinkedHashMap, putFirst, putLast, removeEldestEntry, replaceAll, reversed, sequencedEntrySet, sequencedKeySet, sequencedValues, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, newHashMap, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from interface java.util.SequencedMap

firstEntry, lastEntry, pollFirstEntry, pollLastEntry

Constructor Details

JsonObject

public JsonObject()

Creates an empty JsonObject with the default capacity.

JsonObject

public JsonObject(Map<? extends String,?> map)

Creates a JsonObject from an existing Map.

JsonObject

public JsonObject(int initialCapacity)

Creates a JsonObject with the given initial capacity.

JsonObject

public JsonObject(int initialCapacity,
 float loadFactor)

Creates a JsonObject with the given initial capacity and load factor.

Method Details

builder

public static JsonBuilder<JsonObject> builder()

Creates a JsonBuilder for a JsonObject.

getArray

public JsonArray getArray(String key)

Returns the JsonArray at the given key, or null if it does not exist or is the wrong type.

getArray

public JsonArray getArray(String key,
 JsonArray default_)

Returns the JsonArray at the given key, or the default if it does not exist or is the wrong type.

getBoolean

public boolean getBoolean(String key)

Returns the Boolean at the given key, or false if it does not exist or is the wrong type.

getBoolean

public boolean getBoolean(String key,
 Boolean default_)

Returns the Boolean at the given key, or the default if it does not exist or is the wrong type.

getDouble

public double getDouble(String key)

Returns the Double at the given key, or 0.0 if it does not exist or is the wrong type.

getDouble

public double getDouble(String key,
 double default_)

Returns the Double at the given key, or the default if it does not exist or is the wrong type.

getFloat

public float getFloat(String key)

Returns the Float at the given key, or 0.0f if it does not exist or is the wrong type.

getFloat

public float getFloat(String key,
 float default_)

Returns the Float at the given key, or the default if it does not exist or is the wrong type.

getInt

public int getInt(String key)

Returns the Integer at the given key, or 0 if it does not exist or is the wrong type.

getInt

public int getInt(String key,
 int default_)

Returns the Integer at the given key, or the default if it does not exist or is the wrong type.

getLong

public long getLong(String key)

Returns the Long at the given key, or 0 if it does not exist or is the wrong type.

getLong

public long getLong(String key,
 long default_)

Returns the Long at the given key, or the default if it does not exist or is the wrong type.

getNumber

public Number getNumber(String key)

Returns the Number at the given key, or null if it does not exist or is the wrong type.

getNumber

public Number getNumber(String key,
 Number default_)

Returns the Number at the given key, or the default if it does not exist or is the wrong type.

getObject

public JsonObject getObject(String key)

Returns the JsonObject at the given key, or null if it does not exist or is the wrong type.

getObject

public JsonObject getObject(String key,
 JsonObject default_)

Returns the JsonObject at the given key, or the default if it does not exist or is the wrong type.

getString

public String getString(String key)

Returns the String at the given key, or null if it does not exist or is the wrong type.

getString

public String getString(String key,
 String default_)

Returns the String at the given key, or the default if it does not exist or is the wrong type.

has

public boolean has(String key)

Returns true if the object has an element at that key (even if that element is null).

isBoolean

public boolean isBoolean(String key)

Returns true if the object has a boolean element at that key.

isNull

public boolean isNull(String key)

Returns true if the object has a null element at that key.

isNumber

public boolean isNumber(String key)

Returns true if the object has a number element at that key.

isString

public boolean isString(String key)

Returns true if the object has a string element at that key.