| 1 | package com.hammurapi.extract; |
| 2 | |
| 3 | import java.util.concurrent.TimeUnit; |
| 4 | |
| 5 | |
| 6 | public class NotEqual<T, V, C> extends ComparisonPredicate<T, V, C> { |
| 7 | |
| 8 | private boolean identity; |
| 9 | |
| 10 | public NotEqual( |
| 11 | double initialCost, |
| 12 | TimeUnit costUnit, |
| 13 | Extractor<T, V, C> leftExtractor, |
| 14 | Extractor<T, V, C> rightExtractor, |
| 15 | boolean identity) { |
| 16 | super(initialCost, costUnit, leftExtractor, rightExtractor); |
| 17 | this.identity = identity; |
| 18 | } |
| 19 | |
| 20 | @Override |
| 21 | @SuppressWarnings("unchecked") |
| 22 | public com.hammurapi.extract.ComparisonResult compareTo(Extractor<T, Boolean, C> otherPredicate) { |
| 23 | if (otherPredicate instanceof Equal) { |
| 24 | Equal<T, V, C> op = (Equal<T, V, C>) otherPredicate; |
| 25 | return (operandsAreEqual(op) || operandsAreReverseEqual(op)) ? ComparisonResult.OPPOSITE_NM: ComparisonResult.NOT_EQUAL_NM; |
| 26 | } else if (equals(otherPredicate) || (otherPredicate instanceof NotEqual && operandsAreReverseEqual((NotEqual) otherPredicate))) { |
| 27 | return ComparisonResult.EQUAL_NM; |
| 28 | } else if (otherPredicate instanceof Not) { |
| 29 | Not<T, C> op = (Not<T, C>) otherPredicate; |
| 30 | ComparisonResult cr = compareTo(op.getPredicate()); |
| 31 | if (cr.isOneToOneMapping()) { |
| 32 | switch (cr.getType()) { |
| 33 | case EQUAL: |
| 34 | return ComparisonResult.EQUAL_NM; |
| 35 | case OPPOSITE: |
| 36 | return ComparisonResult.OPPOSITE_NM; |
| 37 | default: |
| 38 | return ComparisonResult.NOT_EQUAL_NM; |
| 39 | } |
| 40 | } |
| 41 | } |
| 42 | /** |
| 43 | * TODO Implement comparisons. |
| 44 | * a * b ? c * d, * - can be <, <=, ==, !=, =>, > |
| 45 | * 36 permutations. Each permutation - compare a/b, c/d |
| 46 | */ |
| 47 | |
| 48 | return super.compareTo(otherPredicate); |
| 49 | } |
| 50 | |
| 51 | @Override |
| 52 | protected boolean compare(int n1, int n2) { |
| 53 | return n1!=n2; |
| 54 | } |
| 55 | |
| 56 | @Override |
| 57 | protected boolean compare(Object o1, Object o2) { |
| 58 | if (identity) { |
| 59 | return o1!=o2; |
| 60 | } |
| 61 | |
| 62 | if (o1==null) { |
| 63 | return o2!=null; |
| 64 | } |
| 65 | |
| 66 | return !o1.equals(o2); |
| 67 | } |
| 68 | |
| 69 | @Override |
| 70 | protected boolean compare(long n1, long n2) { |
| 71 | return n1!=n2; |
| 72 | } |
| 73 | |
| 74 | @Override |
| 75 | protected boolean compare(float n1, float n2) { |
| 76 | return n1!=n2; |
| 77 | } |
| 78 | |
| 79 | @Override |
| 80 | protected boolean compare(double n1, double n2) { |
| 81 | return n1!=n2; |
| 82 | } |
| 83 | |
| 84 | @Override |
| 85 | protected Extractor<T, Boolean, C> newInstance(Extractor<T, V, C> leftExtractor, Extractor<T, V, C> rightExtractor) { |
| 86 | return new NotEqual<T,V,C>(initialCost, costUnit, leftExtractor, rightExtractor, identity); |
| 87 | } |
| 88 | |
| 89 | public boolean isIdentity() { |
| 90 | return identity; |
| 91 | } |
| 92 | } |