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

Class ArrayOperators.ArrayToObject

java.lang.Object

org.springframework.data.mongodb.core.aggregation.ArrayOperators.ArrayToObject

All Implemented Interfaces:

AggregationExpression, MongoExpression

Enclosing class:

ArrayOperators

public static class ArrayOperators.ArrayToObject
extends Object

AggregationExpression for $arrayToObject that transforms an array into a single document.
NOTE: Requires MongoDB 3.6 or later.

Since:

2.1

Author:

Christoph Strobl

See Also:

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

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.
static ArrayOperators.ArrayToObject	arrayToObject(Object array)	Converts the given array (e.g. an array of two-element arrays, a field reference to an array,...) to an object.
static ArrayOperators.ArrayToObject	arrayValueOfToObject(String fieldReference)	Converts the array pointed to by the given field reference to an object.
static ArrayOperators.ArrayToObject	arrayValueOfToObject(AggregationExpression expression)	Converts the result array of the given expression to an object.
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)
org.bson.Document	toDocument(Object value, AggregationOperationContext context)
org.bson.Document	toDocument(AggregationOperationContext context)	Turns the AggregationExpression into a Document within the given AggregationOperationContext.
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

arrayToObject

public static ArrayOperators.ArrayToObject arrayToObject(Object array)

Converts the given array (e.g. an array of two-element arrays, a field reference to an array,...) to an object.

Parameters:

array - must not be null.

Returns:

new instance of ArrayOperators.ArrayToObject.

arrayValueOfToObject

public static ArrayOperators.ArrayToObject arrayValueOfToObject(String fieldReference)

Converts the array pointed to by the given field reference to an object.

Parameters:

fieldReference - must not be null.

Returns:

new instance of ArrayOperators.ArrayToObject.

arrayValueOfToObject

public static ArrayOperators.ArrayToObject arrayValueOfToObject(AggregationExpression expression)

Converts the result array of the given expression to an object.

Parameters:

expression - must not be null.

Returns:

new instance of ArrayOperators.ArrayToObject.

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