1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    * The contents of this file are subject to the terms of the Liferay Enterprise
5    * Subscription License ("License"). You may not use this file except in
6    * compliance with the License. You can obtain a copy of the License by
7    * contacting Liferay, Inc. See the License for the specific language governing
8    * permissions and limitations under the License, including but not limited to
9    * distribution rights of the Software.
10   *
11   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
12   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
13   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
14   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
15   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
16   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
17   * SOFTWARE.
18   */
19  
20  package com.liferay.portlet.unitconverter.util;
21  
22  import com.liferay.portlet.unitconverter.model.Conversion;
23  
24  /**
25   * <a href="ConverterUtil.java.html"><b><i>View Source</i></b></a>
26   *
27   * @author James Lefeu
28   *
29   */
30  public class ConverterUtil {
31  
32      public static int TEMPERATURE_CELSIUS = 1;
33  
34      public static int TEMPERATURE_FAHRENHEIHT = 2;
35  
36      public static Conversion getConversion(int type, int fromId,
37                                             int toId, double fromValue) {
38          double toValue = 0;
39  
40          if (type == 0) {
41              toValue = convertLength(fromId, toId, fromValue);
42          }
43          else if (type == 1) {
44              toValue = convertArea(fromId, toId, fromValue);
45          }
46          else if (type == 2) {
47              toValue = convertVolume(fromId, toId, fromValue);
48          }
49          else if (type == 3) {
50              toValue = convertMass(fromId, toId, fromValue);
51          }
52          else if (type == 4) {
53              toValue = convertTemperature(fromId, toId, fromValue);
54          }
55  
56          return new Conversion(type, fromId, toId, fromValue, toValue);
57      }
58  
59      public static double convertArea(int fromId, int toId, double fromValue) {
60          return (fromValue / _AREA[fromId]) * _AREA[toId];
61      }
62  
63      public static double convertLength(int fromId, int toId, double fromValue) {
64          return (fromValue / _LENGTH[fromId]) * _LENGTH[toId];
65      }
66  
67      public static double convertMass(int fromId, int toId, double fromValue) {
68          return (fromValue / _MASS[fromId]) * _MASS[toId];
69      }
70  
71      public static double convertTemperature(int fromId, int toId,
72                                              double fromValue) {
73          return _fromTemperature(toId, _toTemperature(fromId, fromValue));
74      }
75  
76      public static double convertVolume(int fromId, int toId, double fromValue) {
77          return (fromValue / _VOLUME[fromId]) * _VOLUME[toId];
78      }
79  
80      private final static double _fromTemperature(int toId, double fromValue) {
81          if (toId == 0) {
82              return fromValue;                   // Kelvin
83          }
84          else if (toId == 1) {
85              return fromValue - 273.15;          // Celsius
86          }
87          else if (toId == 2) {
88              return (1.8 * fromValue) - 459.67;  // Fahrenheit
89          }
90          else if (toId == 3) {
91              return 1.8 * fromValue;             // Rankine
92          }
93          else if (toId == 4) {
94              return .8 * (fromValue - 273.15);   // R�aumure
95          }
96          else {
97              return 0;
98          }
99      }
100 
101     private final static double _toTemperature(int fromId, double fromValue) {
102         if (fromId == 0) {                      // Kelvin
103             return fromValue;
104         }
105         else if (fromId == 1) {                 // Celsius
106             return fromValue + 273.15;
107         }
108         else if (fromId == 2) {                 // Fahrenheit
109             return .5555555555 * (fromValue + 459.67);
110         }
111         else if (fromId == 3) {                 // Rankine
112             return .5555555555 * fromValue;
113         }
114         else if (fromId == 4) {
115             return (1.25 * fromValue) + 273.15; // R�aumure
116         }
117         else {
118             return 0;
119         }
120     }
121 
122     private final static double _AREA[] = new double[] {
123         1.0,                // Square Kilometer
124         1000000.0,          // Square Meter
125         10000000000.0,      // Square Centimeter
126         1000000000000.0,    // Square Millimeter
127         10763910,           // Square Foot
128         1550003000,         // Square Inch
129         1195990,            // Square Yard
130         0.3861022,          // Square Mile
131         100,                // Hectare
132         247.1054,           // Acre
133     };
134 
135     private final static double _LENGTH[] = new double[] {
136         1.0,                // Meter
137         1000.0,             // Millimeter
138         100.0,              // Centimeter
139         0.001,              // Kilometer
140         3.28084,            // Foot
141         39.37008,           // Inch
142         1.093613,           // Yard
143         0.000621,           // Mile
144         2.187227,           // Cubit
145         4.374453,           // Talent
146         13.12336            // Handbreath
147     };
148 
149     private final static double _MASS[] = new double[] {
150         1.0,                // Kilogram
151         2.204623,           // Pound
152         0.00110,            // Ton
153         0.02939497,         // Talent
154         1.763698,           // Mina
155         88.18491,           // Shekel
156         132.2774,           // Pim
157         176.2698,           // Beka
158         1763.698,           // Gerah
159     };
160 
161     private final static double _VOLUME[] = new double[] {
162         1.0,                // Liter
163         1000,               // Cubic Centimeter
164         61.02374,           // Cubic Inch (Liquid Measure)
165         1.816166,           // Pint (Dry Measure)
166         0.004729599,        // Cor (Homer)
167         0.009459198,        // Lethek
168         0.04729599,         // Ephah
169         0.141888,           // Seah
170         0.4729599,          // Omer
171         0.851328,           // Cab
172         0.04402868,         // Bath
173         0.2641721,          // Hin
174         3.170065,           // Log
175     };
176 
177 }