Mercurial > dive4elements > river
comparison flys-backend/src/main/java/de/intevation/flys/model/Range.java @ 204:764835268e2b
Added methods to find out if two ranges intersects.
flys-backend/trunk@1579 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 28 Mar 2011 09:06:30 +0000 |
| parents | 3169b559ca3c |
| children | 697d1faa8217 |
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| 203:bfee0e05b4e7 | 204:764835268e2b |
|---|---|
| 24 private BigDecimal b; | 24 private BigDecimal b; |
| 25 | 25 |
| 26 private River river; | 26 private River river; |
| 27 | 27 |
| 28 public Range() { | 28 public Range() { |
| 29 } | |
| 30 | |
| 31 public Range(double a, double b, River river) { | |
| 32 this(new BigDecimal(a), new BigDecimal(b), river); | |
| 29 } | 33 } |
| 30 | 34 |
| 31 public Range(BigDecimal a, BigDecimal b, River river) { | 35 public Range(BigDecimal a, BigDecimal b, River river) { |
| 32 this.a = a; | 36 this.a = a; |
| 33 this.b = b; | 37 this.b = b; |
| 76 } | 80 } |
| 77 | 81 |
| 78 public void setRiver(River river) { | 82 public void setRiver(River river) { |
| 79 this.river = river; | 83 this.river = river; |
| 80 } | 84 } |
| 85 | |
| 86 public int code() { | |
| 87 int code = 0; | |
| 88 if (a != null) code = 1; | |
| 89 if (b != null) code |= 2; | |
| 90 return code; | |
| 91 } | |
| 92 | |
| 93 public boolean intersects(BigDecimal c) { | |
| 94 return !(a.compareTo(c) > 0 || b.compareTo(c) < 0); | |
| 95 } | |
| 96 | |
| 97 public boolean intersects(Range other) { | |
| 98 | |
| 99 int code = code(); | |
| 100 int ocode = other.code(); | |
| 101 | |
| 102 if (code == 0 || ocode == 0) { | |
| 103 return false; | |
| 104 } | |
| 105 | |
| 106 switch (code) { | |
| 107 case 1: // has a | |
| 108 switch (ocode) { | |
| 109 case 1: // has a | |
| 110 return a.compareTo(other.a) == 0; | |
| 111 case 2: // has b | |
| 112 return a.compareTo(other.b) == 0; | |
| 113 case 3: // has range | |
| 114 return other.intersects(a); | |
| 115 } | |
| 116 break; | |
| 117 case 2: // has b | |
| 118 switch (ocode) { | |
| 119 case 1: // has a | |
| 120 return b.compareTo(other.a) == 0; | |
| 121 case 2: // has b | |
| 122 return a.compareTo(other.b) == 0; | |
| 123 case 3: // has range | |
| 124 return other.intersects(b); | |
| 125 } | |
| 126 break; | |
| 127 case 3: // has range | |
| 128 switch (ocode) { | |
| 129 case 1: // has a | |
| 130 return intersects(other.a); | |
| 131 case 2: // has b | |
| 132 return intersects(other.b); | |
| 133 case 3: // has range | |
| 134 return !(other.b.compareTo(a) < 0 | |
| 135 ||other.a.compareTo(b) > 0); | |
| 136 } | |
| 137 break; | |
| 138 | |
| 139 } | |
| 140 | |
| 141 return false; | |
| 142 } | |
| 81 } | 143 } |
| 82 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : | 144 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |