Variable (mongo-java-driver 3.12.10 API)乐学网一站式学习平台

java.lang.Object
- com.mongodb.client.model.Variable<TExpression>

Type Parameters:

TExpression - the type of the value for the new variable
```
public class Variable<TExpression>
extends Object
```
Helps define new variable for the $lookup pipeline stage

Since:

3.7

MongoDB documentation
$lookup
Since server release
3.6

Constructor Summary

Constructors
Constructor Description

Variable(String name, TExpression value)
Creates a new variable definition for use in $lookup pipeline stages

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`equals(Object o)`
`String`	`getName()`
`TExpression`	`getValue()`
`int`	`hashCode()`
`String`	`toString()`

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

- Constructor Detail
  - Variable
```
public Variable(String name,
                TExpression value)
```
    Creates a new variable definition for use in $lookup pipeline stages
    
    Parameters:
    
    name - the name of the new variable
    
    value - the value of the new variable
    
    MongoDB documentation
    $lookup
- Method Detail
  - getName
```
public String getName()
```
    Returns:
    
    the name of the new variable
  - getValue
```
public TExpression getValue()
```
    Returns:
    
    the value of the new variable
  - equals
```
public boolean equals(Object o)
```
    Overrides:
    
    equals in class Object
  - hashCode
```
public int hashCode()
```
    Overrides:
    
    hashCode in class Object
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object