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# Aggregation Framework
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MongoDB aggregation pipeline operations with type-safe stage builders and result processing for complex data transformations and analytics.
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## Capabilities
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### Aggregation Pipeline Interface
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```java { .api }
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public interface MongoCollection<TDocument> {
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    AggregateIterable<TDocument> aggregate(List<? extends Bson> pipeline);
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    <TResult> AggregateIterable<TResult> aggregate(List<? extends Bson> pipeline, Class<TResult> resultClass);
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}
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public final class Aggregates {
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    public static Bson match(Bson filter);
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    public static Bson project(Bson projection);
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    public static Bson sort(Bson sort);
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    public static Bson group(Object id, BsonField... fieldAccumulators);
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    public static Bson lookup(String from, String localField, String foreignField, String as);
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    public static Bson unwind(String fieldName);
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    public static Bson skip(int skip);
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    public static Bson limit(int limit);
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}
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```
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*[Full aggregation pipeline documentation would follow...]*