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1 /**
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2 * Copyright (c) Rich Hickey. All rights reserved.
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3 * The use and distribution terms for this software are covered by the
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4 * Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
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5 * which can be found in the file epl-v10.html at the root of this distribution.
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6 * By using this software in any fashion, you are agreeing to be bound by
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7 * the terms of this license.
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8 * You must not remove this notice, or any other, from this software.
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9 **/
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10
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11 /* rich Mar 31, 2008 */
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12
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13 package clojure.lang;
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14
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15 import java.math.BigInteger;
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16 import java.math.BigDecimal;
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17 import java.math.MathContext;
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18
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19 public class Ratio extends Number implements Comparable{
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20 final public BigInteger numerator;
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21 final public BigInteger denominator;
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22
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23 public Ratio(BigInteger numerator, BigInteger denominator){
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24 this.numerator = numerator;
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25 this.denominator = denominator;
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26 }
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27
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28 public boolean equals(Object arg0){
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29 return arg0 != null
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30 && arg0 instanceof Ratio
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31 && ((Ratio) arg0).numerator.equals(numerator)
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32 && ((Ratio) arg0).denominator.equals(denominator);
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33 }
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34
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35 public int hashCode(){
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36 return numerator.hashCode() ^ denominator.hashCode();
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37 }
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38
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39 public String toString(){
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40 return numerator.toString() + "/" + denominator.toString();
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41 }
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42
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43 public int intValue(){
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44 return (int) doubleValue();
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45 }
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46
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47 public long longValue(){
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48 return bigIntegerValue().longValue();
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49 }
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50
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51 public float floatValue(){
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52 return (float)doubleValue();
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53 }
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54
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55 public double doubleValue(){
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56 return decimalValue(MathContext.DECIMAL64).doubleValue();
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57 }
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58
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59 public BigDecimal decimalValue(){
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60 return decimalValue(MathContext.UNLIMITED);
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61 }
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62
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63 public BigDecimal decimalValue(MathContext mc){
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64 BigDecimal numerator = new BigDecimal(this.numerator);
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65 BigDecimal denominator = new BigDecimal(this.denominator);
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66
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67 return numerator.divide(denominator, mc);
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68 }
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69
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70 public BigInteger bigIntegerValue(){
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71 return numerator.divide(denominator);
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72 }
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73
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74 public int compareTo(Object o){
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75 Number other = (Number)o;
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76 return Numbers.compare(this, other);
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77 }
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78 }
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