DateDeltaExpression (Morphia)

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

```
public class DateDeltaExpression
extends Expression
```
Changes a Date object by a specified number of time units.

Since:

2.3

Since server release
5.0

Constructor Summary

Constructors
Constructor Description

DateDeltaExpression(String operator, Expression startDate, long amount, TimeUnit unit)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`encode(Datastore datastore, BsonWriter writer, EncoderContext encoderContext)`
`DateDeltaExpression`	`timezone(Expression timezone)`	The timezone to carry out the operation.

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
  - DateDeltaExpression
```
@MorphiaInternal
public DateDeltaExpression(String operator,
                           Expression startDate,
                           long amount,
                           TimeUnit unit)
```
    Parameters:
    
    operator -
    
    startDate -
    
    amount -
    
    unit -
    
    Developer note.
    This is an internal item. Its function and presence are subject to change without warning. Its use is highly discouraged.
- Method Detail
  - 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
  - timezone
```
public DateDeltaExpression timezone(Expression timezone)
```
    The timezone to carry out the operation. must be a valid expression that resolves to a string formatted as either an Olson Timezone Identifier or a UTC Offset. If no timezone is provided, the result is displayed in UTC.
    
    Parameters:
    
    timezone - the timezone expression
    
    Returns:
    
    this
    
    Since:
    
    2.3