SwitchExpression (Morphia)

java.lang.Object
- dev.morphia.aggregation.expressions.impls.Expression
- - dev.morphia.aggregation.expressions.impls.SwitchExpression

```
public class SwitchExpression
extends Expression
```
Evaluates a series of case expressions. When it finds an expression which evaluates to true, $switch executes a specified expression and breaks out of the control flow.

Since:

2.0

Constructor Summary

Constructors
Constructor Description

SwitchExpression()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`SwitchExpression`	`branch(Expression caseExpression, Expression then)`	Adds a new branch to the switch
`SwitchExpression`	`defaultCase(Expression caseExpression)`	Adds a default case if nothing is matched.
`void`	`encode(Datastore datastore, BsonWriter writer, EncoderContext encoderContext)`

Methods inherited from class dev.morphia.aggregation.expressions.impls.Expression
getOperation, getValue, toString

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

- Constructor Detail
  - SwitchExpression
```
@MorphiaInternal
public SwitchExpression()
```
    Developer note.
    This is an internal item. Its function and presence are subject to change without warning. Its use is highly discouraged.
- Method Detail
  - branch
```
public SwitchExpression branch(Expression caseExpression,
                               Expression then)
```
    Adds a new branch to the switch
    
    Parameters:
    
    caseExpression - Can be any valid expression that resolves to a boolean. If the result is not a boolean, it is coerced to a boolean value.
    
    then - the expression to evaluate if the case is true
    
    Returns:
    
    this
  - defaultCase
```
public SwitchExpression defaultCase(Expression caseExpression)
```
    Adds a default case if nothing is matched.
    
    Parameters:
    
    caseExpression - the default case
    
    Returns:
    
    this
  - encode
```
public void encode(Datastore datastore,
                   BsonWriter writer,
                   EncoderContext encoderContext)
```
    Overrides:
    
    encode in class Expression
    
    Parameters:
    
    datastore - the datastore
    
    writer - the writer
    
    encoderContext - the context