org.springframework.data.mongodb.core.aggregation

Class ArrayOperators.Size

java.lang.Object

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

All Implemented Interfaces:

AggregationExpression

Enclosing class:

ArrayOperators

public static class ArrayOperators.Size
extends Object

AggregationExpression for $size.

Author:

Christoph Strobl

Method Summary

Modifier and Type	Method and Description
protected List<Object>	append(Object value)
protected Map<String,Object>	append(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()
static ArrayOperators.Size	lengthOfArray(AggregationExpression expression) Creates new ArrayOperators.Size.
static ArrayOperators.Size	lengthOfArray(Collection<?> values) Creates new ArrayOperators.Size.
static ArrayOperators.Size	lengthOfArray(String fieldReference) Creates new ArrayOperators.Size.
org.bson.Document	toDocument(AggregationOperationContext context) Turns the AggregationExpression into a Document within the given AggregationOperationContext.
org.bson.Document	toDocument(Object value, AggregationOperationContext context)
protected List<Object>	values()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getMongoMethod

protected String getMongoMethod()

lengthOfArray

public static ArrayOperators.Size lengthOfArray(String fieldReference)

Creates new ArrayOperators.Size.

Parameters:

fieldReference - must not be null.

Returns:

lengthOfArray

public static ArrayOperators.Size lengthOfArray(AggregationExpression expression)

Creates new ArrayOperators.Size.

Parameters:

expression - must not be null.

Returns:

lengthOfArray

public static ArrayOperators.Size lengthOfArray(Collection<?> values)

Creates new ArrayOperators.Size.

Parameters:

values - must not be null.

Returns:

new instance of ArrayOperators.Size.

Since:

2.2

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

Returns:

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)

append

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

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

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