| 1 | package com.hammurapi.extract; |
| 2 | |
| 3 | import java.util.concurrent.TimeUnit; |
| 4 | |
| 5 | |
| 6 | public class LessThan<T, V extends Comparable<V>, C> extends ComparisonPredicate<T, V, C> { |
| 7 | |
| 8 | public LessThan( |
| 9 | double initialCost, |
| 10 | TimeUnit costUnit, |
| 11 | Extractor<T, V, C> leftExtractor, |
| 12 | Extractor<T, V, C> rightExtractor) { |
| 13 | super(initialCost, costUnit, leftExtractor, rightExtractor); |
| 14 | } |
| 15 | |
| 16 | @Override |
| 17 | public com.hammurapi.extract.ComparisonResult compareTo(Extractor<T, Boolean, C> otherPredicate) { |
| 18 | if (equals(otherPredicate)) { |
| 19 | return ComparisonResult.EQUAL_NM; |
| 20 | } |
| 21 | |
| 22 | /** |
| 23 | * TODO Implement comparisons. |
| 24 | * a * b ? c * d, * - can be <, <=, ==, !=, =>, > |
| 25 | * 36 permutations. Each permutation - compare a/b, c/d |
| 26 | */ |
| 27 | |
| 28 | // TODO if both parts are constants - comparison with True/False. |
| 29 | |
| 30 | return super.compareTo(otherPredicate); |
| 31 | } |
| 32 | |
| 33 | @Override |
| 34 | protected boolean compare(int n1, int n2) { |
| 35 | return n1<n2; |
| 36 | } |
| 37 | |
| 38 | @Override |
| 39 | protected boolean compare(long n1, long n2) { |
| 40 | return n1<n2; |
| 41 | } |
| 42 | |
| 43 | @Override |
| 44 | protected boolean compare(float n1, float n2) { |
| 45 | return n1<n2; |
| 46 | } |
| 47 | |
| 48 | @Override |
| 49 | protected boolean compare(double n1, double n2) { |
| 50 | return n1<n2; |
| 51 | } |
| 52 | |
| 53 | @SuppressWarnings({ "unchecked", "rawtypes" }) |
| 54 | @Override |
| 55 | protected boolean compare(Object o1, Object o2) { |
| 56 | if (o1 instanceof Comparable) { |
| 57 | return ((Comparable) o1).compareTo(o2)<0; |
| 58 | } |
| 59 | throw new UnsupportedOperationException("Can't compare "+getClass().getName()+" on "+o1+" and "+o2); |
| 60 | } |
| 61 | |
| 62 | @Override |
| 63 | protected Extractor<T, Boolean, C> newInstance(Extractor<T, V, C> leftExtractor, Extractor<T, V, C> rightExtractor) { |
| 64 | return new LessThan<T,V,C>(initialCost, costUnit, leftExtractor, rightExtractor); |
| 65 | } |
| 66 | |
| 67 | } |