Package org.springframework.data.mongodb.core.aggregation

Class ObjectOperators.ObjectToArray

java.lang.Object

org.springframework.data.mongodb.core.aggregation.ObjectOperators.ObjectToArray

All Implemented Interfaces:

AggregationExpression, MongoExpression

Enclosing class:

ObjectOperators

public static class ObjectOperators.ObjectToArray
extends Object

AggregationExpression for $objectToArray that converts a document to an array of documents that each contains two fields k and v.
NOTE: Requires MongoDB 3.6 or later.

Since:

2.1

Author:

Christoph Strobl

See Also:

• https://docs.mongodb.com/manual/reference/operator/aggregation/objectToArray/

Method Summary

Modifier and Type	Method	Description
protected List<Object>	append(Object value)
protected List<Object>	append(Object value, org.springframework.data.mongodb.core.aggregation.AbstractAggregationExpression.Expand expandList)
protected Map<String,Object>	append(String key, Object value)
protected Map<String,Object>	appendAt(int index, String key, Object value)	Append the given key at the position in the underlying LinkedHashMap.
protected Map<String,Object>	appendTo(String key, Object value)
protected Map<String,Object>	argumentMap()	Get the argument map.
protected static List<Field>	asFields(String... fieldRefs)
protected boolean	contains(Object key)	Check if the given key is available.
protected <T> T	get(int index)	Get the value at a given index.
protected <T> T	get(Object key)	Get the value for a given key.
protected String	getMongoMethod()
protected boolean	isArgumentMap()
protected Map<String,Object>	remove(String key)
static ObjectOperators.ObjectToArray	toArray(Object value)	Creates new aggregation expression that takes the given value and converts it to an array.
org.bson.Document	toDocument(Object value, AggregationOperationContext context)
org.bson.Document	toDocument(AggregationOperationContext context)	Turns the AggregationExpression into a Document within the given AggregationOperationContext.
static ObjectOperators.ObjectToArray	valueOfToArray(String fieldReference)	Creates new aggregation expression that takes the value pointed to by given fieldReference and converts it to an array.
static ObjectOperators.ObjectToArray	valueOfToArray(AggregationExpression expression)	Creates new aggregation expression that takes the result value of the given expression and converts it to an array.
protected List<Object>	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

valueOfToArray

public static ObjectOperators.ObjectToArray valueOfToArray(String fieldReference)

Creates new aggregation expression that takes the value pointed to by given fieldReference and converts it to an array.

Parameters:

fieldReference - must not be null.

Returns:

new instance of ObjectOperators.ObjectToArray.

valueOfToArray

public static ObjectOperators.ObjectToArray valueOfToArray(AggregationExpression expression)

Creates new aggregation expression that takes the result value of the given expression and converts it to an array.

Parameters:

expression - must not be null.

Returns:

new instance of ObjectOperators.ObjectToArray.

toArray

public static ObjectOperators.ObjectToArray toArray(Object value)

Creates new aggregation expression that takes the given value and converts it to an array.

Parameters:

value - must not be null.

Returns:

new instance of ObjectOperators.ObjectToArray.

getMongoMethod

protected String getMongoMethod()

toDocument

public org.bson.Document toDocument(AggregationOperationContext context)

Description copied from interface: AggregationExpression

Turns the AggregationExpression into a Document within the given AggregationOperationContext.

Specified by:

toDocument in interface AggregationExpression

Parameters:

context - must not be null.

Returns:

the MongoDB native (Document) form of the expression.

toDocument

public org.bson.Document toDocument(Object value,
 AggregationOperationContext context)

asFields

protected static List<Field> asFields(String... fieldRefs)

append

protected List<Object> append(Object value,
 org.springframework.data.mongodb.core.aggregation.AbstractAggregationExpression.Expand expandList)

append

protected List<Object> append(Object value)

append

protected Map<String,Object> append(String key,
 Object value)

appendTo

protected Map<String,Object> appendTo(String key,
 Object value)

remove

protected Map<String,Object> remove(String key)

appendAt

protected Map<String,Object> appendAt(int index,
 String key,
 Object value)

Append the given key at the position in the underlying LinkedHashMap.

Parameters:

index -

key -

value -

Returns:

Since:

3.1

values

protected List<Object> 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

protected <T> T get(Object key)

Get the value for a given key.

Type Parameters:

T -

Parameters:

key -

Returns:

Since:

2.1

isArgumentMap

protected boolean isArgumentMap()

argumentMap

protected Map<String,Object> argumentMap()

Get the argument map.

Returns:

Since:

2.1

contains

protected boolean contains(Object key)

Check if the given key is available.

Parameters:

key -

Returns:

Since:

2.1