Class ArrayOperators.Last
java.lang.Object
org.springframework.data.mongodb.core.aggregation.ArrayOperators.Last
- All Implemented Interfaces:
AggregationExpression
,MongoExpression
- Enclosing class:
- ArrayOperators
AggregationExpression
for $last
that returns the last element in an array. NOTE: Requires MongoDB 4.4 or later.
- Since:
- 3.4
- Author:
- Divya Srivastava, Christoph Strobl
-
Method Summary
Modifier and TypeMethodDescriptionappend
(Object value, org.springframework.data.mongodb.core.aggregation.AbstractAggregationExpression.Expand expandList) Append the given key at the position in the underlyingLinkedHashMap
.Get the argument map.protected boolean
Check if the given key is available.protected <T> T
get
(int index) Get the value at a given index.protected <T> T
Get the value for a given key.protected String
protected boolean
static ArrayOperators.Last
Returns the last element in the given array.static ArrayOperators.Last
Returns the last element in the array pointed to by the givenfield reference
.static ArrayOperators.Last
lastOf
(AggregationExpression expression) Returns the last element of the array computed buy the givenexpression
.org.bson.Document
toDocument
(Object value, AggregationOperationContext context) org.bson.Document
toDocument
(AggregationOperationContext context) values()
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface org.springframework.data.mongodb.core.aggregation.AggregationExpression
toDocument
-
Method Details
-
last
Returns the last element in the given array.- Parameters:
array
- must not be null.- Returns:
- new instance of
ArrayOperators.Last
.
-
lastOf
Returns the last element in the array pointed to by the givenfield reference
.- Parameters:
fieldReference
- must not be null.- Returns:
- new instance of
ArrayOperators.Last
.
-
lastOf
Returns the last element of the array computed buy the givenexpression
.- Parameters:
expression
- must not be null.- Returns:
- new instance of
ArrayOperators.Last
.
-
getMongoMethod
-
toDocument
Description copied from interface:AggregationExpression
- Specified by:
toDocument
in interfaceAggregationExpression
- Parameters:
context
- must not be null.- Returns:
- the MongoDB native (
Document
) form of the expression.
-
toDocument
-
asFields
-
append
-
append
-
append
-
appendTo
-
remove
-
appendAt
Append the given key at the position in the underlyingLinkedHashMap
.- Parameters:
index
-key
-value
-- Returns:
- Since:
- 3.1
-
values
-
get
protected <T> T get(int index) Get the value at a given index.- Type Parameters:
T
-- Parameters:
index
-- Returns:
- Since:
- 2.1
-
get
Get the value for a given key.- Type Parameters:
T
-- Parameters:
key
-- Returns:
- Since:
- 2.1
-
isArgumentMap
protected boolean isArgumentMap() -
argumentMap
Get the argument map.- Returns:
- Since:
- 2.1
-
contains
Check if the given key is available.- Parameters:
key
-- Returns:
- Since:
- 2.1
-