Java tutorial
/* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package ec.edu.espe.distribuidas.factnosql.test; import ec.edu.espe.distribuidas.factnosql.modelo.Factura; import ec.edu.espe.distribuidas.factnosql.modelo.PersonasSum; import ec.edu.espe.distribuidas.factnosql.modelo.ProductoSum; import ec.edu.espe.distribuidas.factnosql.persistencia.PersistenceManager; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Iterator; import java.util.List; import org.apache.commons.collections.IteratorUtils; import org.mongodb.morphia.aggregation.Accumulator; import org.mongodb.morphia.aggregation.Group; import org.mongodb.morphia.query.Query; /** * * @author RAUL */ public class consultaPersonas { public static void main(String[] args) throws ParseException { PersistenceManager persistence = new PersistenceManager(); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); Query q = persistence.context().createQuery(Factura.class).field("fechaEmision") .equal(sdf.parse("2016-01-27")); Iterator<ProductoSum> aggregate = persistence.context().createAggregation(Factura.class).match(q) .unwind("detalle") .group("detalle.producto", Group.grouping("count", Group.sum("detalle.cantidad")), Group.grouping("fecha", Group.first("fechaEmision")), Group.grouping("codigo", Group.first("detalle.codigo"))) .aggregate(ProductoSum.class); List<ProductoSum> presonasS = IteratorUtils.toList(aggregate); for (ProductoSum p : presonasS) System.out.println(p); } }