NullId (JsonRpc4J 2.0.7 API)

java.lang.Object
- eliasstar.jsonrpc.objects.id.NullId

All Implemented Interfaces:

Id<Object>, Supplier<Object>
```
public final class NullId
extends Object
implements Id<Object>
```
Represents an id with a value of null.

Since:

0.1.0

Author:

Elias*

See Also:

JSON-RPC Specification

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object obj)`	Every `NullId` is equal.
`Object`	`get()`	Getter for `null`.
`int`	`hashCode()`	The hash code is always zero because there is only one instance of `NullId`.
`static NullId`	`instance()`	Getter for singleton instance.
`String`	`toString()`	Gets the literal string `"null"`.
`void`	`write(com.google.gson.stream.JsonWriter out)`	Writes a null literal to out.

Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Method Detail
  - instance
```
public static NullId instance()
```
    Getter for singleton instance.
    The instance is lazyly instanciated, which means the the singleton instance is created when this method is invoked for the first time. Any consecutive calls return the instance.
    
    Returns:
    
    The only instance of NullId
  - get
```
public Object get()
```
    Getter for null.
    
    Specified by:
    
    get in interface Supplier<Object>
    
    Returns:
    
    null
  - write
```
public void write(com.google.gson.stream.JsonWriter out)
           throws IOException
```
    Writes a null literal to out.
    
    Specified by:
    
    write in interface Id<Object>
    
    Parameters:
    
    out - The JsonWriter used as output
    
    Throws:
    
    IOException - If serialization fails
  - hashCode
```
public int hashCode()
```
    The hash code is always zero because there is only one instance of NullId.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    
    Always 0
  - equals
```
public boolean equals(Object obj)
```
    Every NullId is equal.
    
    Overrides:
    
    equals in class Object
    
    Returns:
    
    true if the argument is an instance of NullId
  - toString
```
public String toString()
```
    Gets the literal string "null".
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    "null"