teichmann@5829: package org.dive4elements.river.model;
sascha@167: 
sascha@167: import java.io.Serializable;
sascha@167: 
sascha@167: import java.math.BigDecimal;
sascha@167: 
sascha@171: import javax.persistence.Entity;
sascha@171: import javax.persistence.Id;
sascha@171: import javax.persistence.Table;
sascha@171: import javax.persistence.GeneratedValue;
sascha@171: import javax.persistence.Column;
sascha@171: import javax.persistence.SequenceGenerator;
sascha@171: import javax.persistence.GenerationType;
sascha@174: import javax.persistence.JoinColumn;
sascha@174: import javax.persistence.OneToOne;
sascha@171: 
sascha@171: @Entity
sascha@171: @Table(name = "ranges")
sascha@167: public class Range
sascha@167: implements   Serializable
sascha@167: {
felix@5743:     public static final double EPSILON = 1e-5;
sascha@171:     private Integer    id;
sascha@167:     private BigDecimal a;
sascha@167:     private BigDecimal b;
sascha@167: 
sascha@167:     private River      river;
sascha@167: 
sascha@167:     public Range() {
sascha@167:     }
sascha@167: 
sascha@204:     public Range(double a, double b, River river) {
sascha@204:         this(new BigDecimal(a), new BigDecimal(b), river);
sascha@204:     }
sascha@204: 
sascha@201:     public Range(BigDecimal a, BigDecimal b, River river) {
sascha@201:         this.a     = a;
sascha@201:         this.b     = b;
sascha@201:         this.river = river;
sascha@201:     }
sascha@201: 
sascha@171:     @Id
sascha@171:     @SequenceGenerator(
sascha@171:         name           = "SEQUENCE_RANGES_ID_SEQ",
sascha@171:         sequenceName   = "RANGES_ID_SEQ",
sascha@171:         allocationSize = 1)
sascha@171:     @GeneratedValue(
sascha@171:         strategy  = GenerationType.SEQUENCE,
sascha@171:         generator = "SEQUENCE_RANGES_ID_SEQ")
sascha@171:     @Column(name = "id")
sascha@171:     public Integer getId() {
sascha@171:         return id;
sascha@171:     }
sascha@171: 
sascha@168:     public void setId(Integer id) {
sascha@167:         this.id = id;
sascha@167:     }
sascha@167: 
sascha@172:     @Column(name = "a") // FIXME: type mapping needed?
sascha@172:     public BigDecimal getA() {
sascha@172:         return a;
sascha@172:     }
sascha@172: 
sascha@167:     public void setA(BigDecimal a) {
sascha@167:         this.a = a;
sascha@167:     }
sascha@167: 
sascha@172:     @Column(name = "b") // FIXME: type mapping needed?
sascha@172:     public BigDecimal getB() {
sascha@172:         return b;
sascha@167:     }
sascha@167: 
sascha@167:     public void setB(BigDecimal b) {
sascha@167:         this.b = b;
sascha@167:     }
sascha@167: 
felix@5743:     public boolean containsTolerant(double x) {
felix@5743:             return containsTolerant(x, EPSILON);
felix@5743:     }
felix@5743: 
felix@5743:     public boolean containsTolerant(double x, double tolerance) {
felix@5743:         BigDecimal b = this.b != null ? this.b : a;
felix@5743:         double av = a.doubleValue();
felix@5743:         double bv = b.doubleValue();
felix@5743:         if (av > bv) {
felix@5743:             double t = av;
felix@5743:             av = bv;
felix@5743:             bv = t;
felix@5743:         }
felix@5743:         return x+tolerance >= av && x-tolerance <= bv;
felix@5743:     }
felix@5743: 
teichmann@5587:     public boolean contains(double x) {
teichmann@5587:         BigDecimal b = this.b != null ? this.b : a;
teichmann@5587:         double av = a.doubleValue();
teichmann@5587:         double bv = b.doubleValue();
teichmann@5587:         if (av > bv) {
teichmann@5587:             double t = av;
teichmann@5587:             av = bv;
teichmann@5587:             bv = t;
teichmann@5587:         }
teichmann@5587:         return x >= av && x <= bv;
teichmann@5587:     }
teichmann@5587: 
sascha@188:     @OneToOne
sascha@188:     @JoinColumn(name = "river_id")
sascha@188:     public River getRiver() {
sascha@188:         return river;
sascha@188:     }
sascha@188: 
sascha@167:     public void setRiver(River river) {
sascha@167:         this.river = river;
sascha@167:     }
sascha@204: 
sascha@204:     public int code() {
sascha@204:         int code = 0;
sascha@204:         if (a != null) code  = 1;
sascha@204:         if (b != null) code |= 2;
sascha@204:         return code;
sascha@204:     }
sascha@204: 
sascha@204:     public boolean intersects(BigDecimal c) {
sascha@204:         return !(a.compareTo(c) > 0 || b.compareTo(c) < 0);
sascha@204:     }
sascha@204: 
sascha@204:     public boolean intersects(Range other) {
sascha@204: 
sascha@204:         int code  = code();
sascha@204:         int ocode = other.code();
sascha@204: 
sascha@204:         if (code == 0 || ocode == 0) {
sascha@204:             return false;
sascha@204:         }
sascha@204: 
sascha@204:         switch (code) {
sascha@204:             case 1: // has a
sascha@204:                 switch (ocode) {
sascha@204:                     case 1: // has a
sascha@204:                         return a.compareTo(other.a) == 0;
sascha@204:                     case 2: // has b
sascha@204:                         return a.compareTo(other.b) == 0;
sascha@204:                     case 3: // has range
sascha@204:                         return other.intersects(a);
sascha@204:                 }
sascha@204:                 break;
sascha@204:             case 2: // has b
sascha@204:                 switch (ocode) {
sascha@204:                     case 1: // has a
sascha@204:                         return b.compareTo(other.a) == 0;
sascha@204:                     case 2: // has b
sascha@205:                         return b.compareTo(other.b) == 0;
sascha@204:                     case 3: // has range
sascha@204:                         return other.intersects(b);
sascha@204:                 }
sascha@204:                 break;
sascha@204:             case 3: // has range
sascha@204:                 switch (ocode) {
sascha@204:                     case 1: // has a
sascha@204:                         return intersects(other.a);
sascha@204:                     case 2: // has b
sascha@204:                         return intersects(other.b);
sascha@204:                     case 3: // has range
sascha@204:                         return !(other.b.compareTo(a) < 0
sascha@204:                                ||other.a.compareTo(b) > 0);
sascha@204:                 }
sascha@204:                 break;
sascha@204: 
sascha@204:         }
sascha@204: 
sascha@204:         return false;
sascha@204:     }
sascha@167: }
sascha@167: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :