Mercurial > dive4elements > river
view flys-backend/src/main/java/de/intevation/flys/model/River.java @ 752:06e8d0b8fad9
Tagged release 2.3.1 of flys-backend.
flys-backend/trunk@1970 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
---|---|
date | Fri, 20 May 2011 09:30:08 +0000 |
parents | ce9c6f05f464 |
children | ca13926b8871 |
line wrap: on
line source
package de.intevation.flys.model; import java.io.Serializable; import java.math.BigDecimal; import javax.persistence.Entity; import javax.persistence.Id; import javax.persistence.Table; import javax.persistence.GeneratedValue; import javax.persistence.Column; import javax.persistence.SequenceGenerator; import javax.persistence.OneToMany; import javax.persistence.JoinColumn; import javax.persistence.GenerationType; import java.util.List; import org.hibernate.Session; import org.hibernate.Query; import de.intevation.flys.backend.SessionHolder; @Entity @Table(name = "rivers") public class River implements Serializable { private Integer id; private String name; private boolean kmUp; private List<Gauge> gauges; @Id @SequenceGenerator( name = "SEQUENCE_RIVERS_ID_SEQ", sequenceName = "RIVERS_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_RIVERS_ID_SEQ") @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Column(name = "name") public String getName() { return name; } public void setName(String name) { this.name = name; } @Column(name = "km_up") public boolean getKmUp() { return kmUp; } public void setKmUp(boolean kmUp) { this.kmUp = kmUp; } public River() { } public River(String name) { this.name = name; } @OneToMany @JoinColumn(name="river_id") public List<Gauge> getGauges() { return gauges; } public void setGauges(List<Gauge> gauges) { this.gauges = gauges; } public String toString() { return name != null ? name : ""; } /** * This method returns the gauges that intersect with <i>a</i> and * <i>b</i>, * * @param a A start point. * @param b An end point. * * @return the intersecting gauges. */ public List<Gauge> determineGauges(double a, double b) { Session session = SessionHolder.HOLDER.get(); Query query = session.createQuery( "from Gauge where river=:river " + "and not (range.a > :b or range.b < :a) order by a"); query.setParameter("river", this); query.setParameter("a", new BigDecimal(a)); query.setParameter("b", new BigDecimal(b)); return query.list(); } /** * This method returns the first gauge that is intersected by <i>a</i> and * <i>b</i>, * * @param a A start point. * @param b An end point. * * @return the first intersecting gauge. */ public Gauge determineGauge(double a, double b) { List<Gauge> gauges = determineGauges(a, b); return gauges != null && gauges.size() > 0 ? gauges.get(0) : null; } /** * Returns the min and max distance of this river. The first position in the * resulting array contains the min distance, the second position the max * distance. * * @return the min and max distance of this river. */ public double[] determineMinMaxDistance() { if (gauges == null) { return null; } double minmax[] = new double[] { Double.MAX_VALUE, Double.MIN_VALUE }; for (Gauge g: gauges) { Range r = g.getRange(); double a = r.getA().doubleValue(); minmax[0] = minmax[0] < a ? minmax[0] : a; BigDecimal bigB = r.getB(); if (bigB != null) { double b = bigB.doubleValue(); minmax[1] = minmax[1] > b ? minmax[1] : b; } } return minmax; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :