com.mongodb

Class MappingIterable<U,V>

java.lang.Object

com.mongodb.MappingIterable<U,V>

All Implemented Interfaces:

MongoIterable<V>, java.lang.Iterable<V>

class MappingIterable<U,V>
extends java.lang.Object
implements MongoIterable<V>

Field Summary

Fields

Modifier and Type	Field and Description
private MongoIterable<U>	iterable
private Function<U,V>	mapper

Constructor Summary

Constructors

Constructor and Description
MappingIterable(MongoIterable<U> iterable, Function<U,V> mapper)

Method Summary

Modifier and Type	Method and Description
MappingIterable<U,V>	batchSize(int batchSize) Sets the number of documents to return per batch.
V	first() Helper to return the first item in the iterator or null.
void	forEach(Block<? super V> block) Iterates over all documents in the view, applying the given block to each.
<A extends java.util.Collection<? super V>> A	into(A target) Iterates over all the documents, adding each to the given target.
MongoCursor<V>	iterator()
<W> MongoIterable<W>	map(Function<V,W> newMap) Maps this iterable from the source document type to the target document type.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Field Detail

iterable

private final MongoIterable<U> iterable

mapper

private final Function<U,V> mapper

Constructor Detail

MappingIterable

public MappingIterable(MongoIterable<U> iterable,
                       Function<U,V> mapper)

Method Detail

iterator

public MongoCursor<V> iterator()

Specified by:

iterator in interface MongoIterable<V>

Specified by:

iterator in interface java.lang.Iterable<V>

first

public V first()

Description copied from interface: MongoIterable

Helper to return the first item in the iterator or null.

Specified by:

first in interface MongoIterable<V>

Returns:

T the first item or null.

forEach

public void forEach(Block<? super V> block)

Description copied from interface: MongoIterable

Iterates over all documents in the view, applying the given block to each.

Similar to map but the function is fully encapsulated with no returned result.

Specified by:

forEach in interface MongoIterable<V>

Parameters:

block - the block to apply to each document of type T.

into

public <A extends java.util.Collection<? super V>> A into(A target)

Description copied from interface: MongoIterable

Iterates over all the documents, adding each to the given target.

Specified by:

into in interface MongoIterable<V>

Type Parameters:

A - the collection type

Parameters:

target - the collection to insert into

Returns:

the target

batchSize

public MappingIterable<U,V> batchSize(int batchSize)

Description copied from interface: MongoIterable

Sets the number of documents to return per batch.

Specified by:

batchSize in interface MongoIterable<V>

Parameters:

batchSize - the batch size

Returns:

this

map

public <W> MongoIterable<W> map(Function<V,W> newMap)

Description copied from interface: MongoIterable

Maps this iterable from the source document type to the target document type.

Specified by:

map in interface MongoIterable<V>

Type Parameters:

W - the target document type

Parameters:

newMap - a function that maps from the source to the target document type

Returns:

an iterable which maps T to U