Mercurial > dive4elements > river
view backend/src/main/java/org/dive4elements/river/model/Range.java @ 6229:3fea9701d58d
Fix gauge determination.
If we look upstream ( a > b ) we still have to compare
the start value of our range against the gauge and not the end
value. The start value is always the relevant value as we
handle the direction by checking this against A or B of the gauge.
Also:
I will never compare doubles with == again.
I will never compare doubles with == again.
I will never compare doubles with == again.
I will never compare doubles with == again.
I will never compare doubles with == again.
author | Andre Heinecke <aheinecke@intevation.de> |
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date | Thu, 06 Jun 2013 18:23:17 +0200 |
parents | 4c3ccf2b0304 |
children |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * 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; 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.GenerationType; import javax.persistence.JoinColumn; import javax.persistence.OneToOne; @Entity @Table(name = "ranges") public class Range implements Serializable { public static final double EPSILON = 1e-5; private Integer id; private BigDecimal a; private BigDecimal b; private River river; public Range() { } public Range(double a, double b, River river) { this(new BigDecimal(a), new BigDecimal(b), river); } public Range(BigDecimal a, BigDecimal b, River river) { this.a = a; this.b = b; this.river = river; } @Id @SequenceGenerator( name = "SEQUENCE_RANGES_ID_SEQ", sequenceName = "RANGES_ID_SEQ", allocationSize = 1) @GeneratedValue( strategy = GenerationType.SEQUENCE, generator = "SEQUENCE_RANGES_ID_SEQ") @Column(name = "id") public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } @Column(name = "a") // FIXME: type mapping needed? public BigDecimal getA() { return a; } public void setA(BigDecimal a) { this.a = a; } @Column(name = "b") // FIXME: type mapping needed? public BigDecimal getB() { return b; } public void setB(BigDecimal b) { this.b = b; } public boolean containsTolerant(double x) { return containsTolerant(x, EPSILON); } public boolean containsTolerant(double x, double tolerance) { BigDecimal b = this.b != null ? this.b : a; double av = a.doubleValue(); double bv = b.doubleValue(); if (av > bv) { double t = av; av = bv; bv = t; } return x+tolerance >= av && x-tolerance <= bv; } public boolean contains(double x) { BigDecimal b = this.b != null ? this.b : a; double av = a.doubleValue(); double bv = b.doubleValue(); if (av > bv) { double t = av; av = bv; bv = t; } return x >= av && x <= bv; } @OneToOne @JoinColumn(name = "river_id") public River getRiver() { return river; } public void setRiver(River river) { this.river = river; } public int code() { int code = 0; if (a != null) code = 1; if (b != null) code |= 2; return code; } public boolean intersects(BigDecimal c) { return !(a.compareTo(c) > 0 || b.compareTo(c) < 0); } public boolean intersects(Range other) { int code = code(); int ocode = other.code(); if (code == 0 || ocode == 0) { return false; } switch (code) { case 1: // has a switch (ocode) { case 1: // has a return a.compareTo(other.a) == 0; case 2: // has b return a.compareTo(other.b) == 0; case 3: // has range return other.intersects(a); } break; case 2: // has b switch (ocode) { case 1: // has a return b.compareTo(other.a) == 0; case 2: // has b return b.compareTo(other.b) == 0; case 3: // has range return other.intersects(b); } break; case 3: // has range switch (ocode) { case 1: // has a return intersects(other.a); case 2: // has b return intersects(other.b); case 3: // has range return !(other.b.compareTo(a) < 0 ||other.a.compareTo(b) > 0); } break; } return false; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :