diff options
Diffstat (limited to 'base/src/main/java/bjc/utils/data/Pair.java')
| -rw-r--r-- | base/src/main/java/bjc/utils/data/Pair.java | 142 |
1 files changed, 0 insertions, 142 deletions
diff --git a/base/src/main/java/bjc/utils/data/Pair.java b/base/src/main/java/bjc/utils/data/Pair.java deleted file mode 100644 index df7e199..0000000 --- a/base/src/main/java/bjc/utils/data/Pair.java +++ /dev/null @@ -1,142 +0,0 @@ -package bjc.utils.data; - -import java.util.function.BiFunction; -import java.util.function.Function; - -/** - * A pair of values, with nothing special about them. - * - * @author ben - * - * @param <LeftType> - * The type of the left value. - * - * @param <RightType> - * The type of the right value. - */ -public class Pair<LeftType, RightType> implements IPair<LeftType, RightType> { - /* The left value. */ - private LeftType leftValue; - /* The right value. */ - private RightType rightValue; - - /** Create a new pair with both sides set to null. */ - public Pair() { - - } - - /** - * Create a new pair with both sides set to the specified values. - * - * @param left - * The value of the left side. - * - * @param right - * The value of the right side. - */ - public Pair(final LeftType left, final RightType right) { - leftValue = left; - rightValue = right; - } - - @Override - public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( - final BiFunction<LeftType, RightType, IPair<BoundLeft, BoundRight>> binder) { - if(binder == null) throw new NullPointerException("Binder must not be null."); - - return binder.apply(leftValue, rightValue); - } - - @Override - public <BoundLeft> IPair<BoundLeft, RightType> bindLeft( - final Function<LeftType, IPair<BoundLeft, RightType>> leftBinder) { - if(leftBinder == null) throw new NullPointerException("Binder must not be null"); - - return leftBinder.apply(leftValue); - } - - @Override - public <BoundRight> IPair<LeftType, BoundRight> bindRight( - final Function<RightType, IPair<LeftType, BoundRight>> rightBinder) { - if(rightBinder == null) throw new NullPointerException("Binder must not be null"); - - return rightBinder.apply(rightValue); - } - - @Override - public <OtherLeft, OtherRight, CombinedLeft, CombinedRight> IPair<CombinedLeft, CombinedRight> combine( - final IPair<OtherLeft, OtherRight> otherPair, - final BiFunction<LeftType, OtherLeft, CombinedLeft> leftCombiner, - final BiFunction<RightType, OtherRight, CombinedRight> rightCombiner) { - return otherPair.bind((otherLeft, otherRight) -> { - final CombinedLeft left = leftCombiner.apply(leftValue, otherLeft); - final CombinedRight right = rightCombiner.apply(rightValue, otherRight); - - return new Pair<>(left, right); - }); - } - - @Override - public <NewLeft> IPair<NewLeft, RightType> mapLeft(final Function<LeftType, NewLeft> mapper) { - if(mapper == null) throw new NullPointerException("Mapper must not be null"); - - return new Pair<>(mapper.apply(leftValue), rightValue); - } - - @Override - public <NewRight> IPair<LeftType, NewRight> mapRight(final Function<RightType, NewRight> mapper) { - if(mapper == null) throw new NullPointerException("Mapper must not be null"); - - return new Pair<>(leftValue, mapper.apply(rightValue)); - } - - @Override - public <MergedType> MergedType merge(final BiFunction<LeftType, RightType, MergedType> merger) { - if(merger == null) throw new NullPointerException("Merger must not be null"); - - return merger.apply(leftValue, rightValue); - } - - @Override - public String toString() { - return String.format("Pair [leftValue='%s', rightValue='%s']", leftValue, rightValue); - } - - public LeftType getLeft() { - return leftValue; - } - - public RightType getRight() { - return rightValue; - } - - @Override - public int hashCode() { - final int prime = 31; - int result = 1; - - result = prime * result + (leftValue == null ? 0 : leftValue.hashCode()); - result = prime * result + (rightValue == null ? 0 : rightValue.hashCode()); - - return result; - } - - @Override - public boolean equals(final Object obj) { - if(this == obj) return true; - if(obj == null) return false; - if(!(obj instanceof Pair<?, ?>)) return false; - - final Pair<?, ?> other = (Pair<?, ?>) obj; - - if(leftValue == null) { - if(other.leftValue != null) return false; - } else if(!leftValue.equals(other.leftValue)) return false; - - if(rightValue == null) { - if(other.rightValue != null) return false; - } else if(!rightValue.equals(other.rightValue)) return false; - - return true; - } -} |
