Mercurial > dive4elements > river
view backend/src/main/java/org/dive4elements/river/model/sinfo/DailyDischargeValue.java @ 9405:34cd4faf43f4
minMax queries
author | gernotbelger |
---|---|
date | Wed, 15 Aug 2018 14:34:23 +0200 |
parents | bc9a45d2b1fa |
children | 38201f5b0dd9 |
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/* Copyright (C) 2017 by Bundesanstalt für Gewässerkunde * Software engineering by * Björnsen Beratende Ingenieure GmbH * Dr. Schumacher Ingenieurbüro für Wasser und Umwelt * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.model.sinfo; import java.io.Serializable; import java.util.Date; import java.util.List; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.GenerationType; import javax.persistence.Id; import javax.persistence.JoinColumn; import javax.persistence.OneToOne; import javax.persistence.SequenceGenerator; import javax.persistence.Table; import org.dive4elements.river.backend.SessionHolder; import org.dive4elements.river.model.Gauge; import org.hibernate.Query; import org.hibernate.Session; /** * Hibernate binding for the DB table daily_discharge_values * * @author Matthias Schäfer * */ @Entity @Table(name = "daily_discharge_values") public class DailyDischargeValue implements Serializable { /***** TYPES *****/ /** * Field to use in a query's order-by clause * */ public enum OrderByField { DAY, DISCHARGE; } public enum MinMax { min, max } /***** FIELDS *****/ private static final long serialVersionUID = -6192738825193230784L; private Integer id; private DailyDischarge dailyDischarge; private Date day; private Double discharge; /***** CONSTRUCTORS *****/ public DailyDischargeValue() { } public DailyDischargeValue(final DailyDischarge dailyDischarge, final Date day, final Double discharge) { this.dailyDischarge = dailyDischarge; this.day = day; this.discharge = discharge; } /** * Parameter constructor with primitive parameter types */ public DailyDischargeValue(final DailyDischarge dailyDischarge, final Date day, final double discharge) { this(dailyDischarge, day, Double.valueOf(discharge)); } /***** METHODS *****/ @Id @SequenceGenerator(name = "SEQUENCE_DAILY_DISCHARGE_VALUE_ID_SEQ", sequenceName = "DAILY_DISCHARGE_VALUES_ID_SEQ", allocationSize = 1) @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_DAILY_DISCHARGE_VALUE_ID_SEQ") @Column(name = "id") public Integer getId() { return this.id; } public void setId(final Integer id) { this.id = id; } @OneToOne @JoinColumn(name = "daily_discharge_id") public DailyDischarge getDailyDischarge() { return this.dailyDischarge; } public void setDailyDischarge(final DailyDischarge dailyDischarge) { this.dailyDischarge = dailyDischarge; } @Column(name = "discharge") public Double getDischarge() { return this.discharge; } public void setDischarge(final Double discharge) { this.discharge = discharge; } @Column(name = "day") public Date getDay() { return this.day; } public void setDay(final Date day) { this.day = day; } /** * Selects from the database the daily discharge values of a gauge and a date range */ public static List<DailyDischargeValue> getValues(final Gauge gauge, final Date startDate, final Date endDate, final OrderByField orderBy) { final Session session = SessionHolder.HOLDER.get(); final String orderField = (orderBy == OrderByField.DISCHARGE) ? "discharge" : "day"; final Query query = session.createQuery("SELECT v" + " FROM DailyDischargeValue AS v JOIN v.dailyDischarge AS s" + " WHERE (s.gauge.id=:gaugeid) AND (v.day BETWEEN :startDate AND :endDate)" + " ORDER BY " + orderField); query.setParameter("gaugeid", gauge.getId()); query.setParameter("startDate", startDate); query.setParameter("endDate", endDate); return query.list(); } /** * Selects from the database the daily discharge, puts the first and the last into a List (min, max day) */ public static Date getGlobalMinMax(final Gauge gauge, final MinMax minmax) { final Session session = SessionHolder.HOLDER.get(); final Query query = session.createQuery( "SELECT " + minmax.toString() + "(v.day) " + " FROM DailyDischargeValue AS v JOIN v.dailyDischarge AS s" + " WHERE (s.gauge.id=:gaugeid)"); query.setParameter("gaugeid", gauge.getId()); final List<Date> list = query.list(); if (list != null && list.size() == 1) { return list.get(0); } return null; } }