Example usage for org.springframework.data.mongodb.core.aggregation Aggregation newAggregation

Introduction

In this page you can find the example usage for org.springframework.data.mongodb.core.aggregation Aggregation newAggregation.

Prototype

public static <T> TypedAggregation<T> newAggregation(Class<T> type, AggregationOperation... operations) 

Source Link

Document

Creates a new TypedAggregation for the given type and AggregationOperation s.

Usage

From source file:io.smalldata.ohmageomh.data.repository.MongoDataPointRepositoryImpl.java

@Override
public List<LastDataPointDate> findLastDataPointDate(List<String> userIds,
        DataPointSearchCriteria searchCriteria, String dateField) {

    if (dateField == null) {
        dateField = "header.creation_date_time";
    }//from  w  w  w .j  a  v  a 2 s . c om

    Aggregation agg = Aggregation.newAggregation(
            Aggregation.match(Criteria.where("header.user_id").in(userIds).and("header.schema_id.namespace")
                    .is(searchCriteria.getSchemaNamespace()).and("header.schema_id.name")
                    .is(searchCriteria.getSchemaName()).and("header.schema_id.version.major")
                    .is(searchCriteria.getSchemaVersion().getMajor()).and("header.schema_id.version.minor")
                    .is(searchCriteria.getSchemaVersion().getMinor())),
            Aggregation.group("header.user_id").max(dateField).as("date").last("header.user_id").as("user_id"));

    //Convert the aggregation result into a List
    AggregationResults<LastDataPointDate> groupResults = mongoOperations.aggregate(agg, "dataPoint",
            LastDataPointDate.class);

    List<LastDataPointDate> result = groupResults.getMappedResults();

    return result;
}

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