From 002516bd03b2ea3f731c8139c9a5f716902ab702 Mon Sep 17 00:00:00 2001 From: Ben Culkin Date: Tue, 7 Apr 2020 21:03:53 -0400 Subject: Finish remove utils.data utils.data now lives in the esodata project; not in this one --- base/src/main/java/bjc/utils/data/Either.java | 191 -------------------------- 1 file changed, 191 deletions(-) delete mode 100644 base/src/main/java/bjc/utils/data/Either.java (limited to 'base/src/main/java/bjc/utils/data/Either.java') diff --git a/base/src/main/java/bjc/utils/data/Either.java b/base/src/main/java/bjc/utils/data/Either.java deleted file mode 100644 index 6023b60..0000000 --- a/base/src/main/java/bjc/utils/data/Either.java +++ /dev/null @@ -1,191 +0,0 @@ -package bjc.utils.data; - -import java.util.function.BiFunction; -import java.util.function.Function; - -/** - * Represents a pair where only one side has a value. - * - * @author ben - * - * @param - * The type that could be on the left. - * - * @param - * The type that could be on the right. - * - */ -public class Either implements IPair { - /** - * Create a new either with the left value occupied. - * - * @param - * The type of the left value. - * - * @param - * The type of the empty right value. - * - * @param left - * The value to put on the left. - * - * @return An either with the left side occupied. - */ - public static Either left(final LeftType left) { - return new Either<>(left, null); - } - - /** - * Create a new either with the right value occupied. - * - * @param - * The type of the empty left value. - * - * @param - * The type of the right value. - * - * @param right - * The value to put on the right. - * - * @return An either with the right side occupied. - */ - public static Either right(final RightType right) { - return new Either<>(null, right); - } - - /* The left value of the either. */ - private LeftType leftVal; - /* The right value of the either. */ - private RightType rightVal; - /* Whether the left value is the one filled out. */ - private boolean isLeft; - - /* Create a new either with specifed values. */ - private Either(final LeftType left, final RightType right) { - if(left == null) { - rightVal = right; - } else { - leftVal = left; - - isLeft = true; - } - } - - @Override - public IPair bind( - final BiFunction> binder) { - if(binder == null) throw new NullPointerException("Binder must not be null"); - - return binder.apply(leftVal, rightVal); - } - - @Override - public IPair bindLeft( - final Function> leftBinder) { - if(leftBinder == null) throw new NullPointerException("Left binder must not be null"); - - if(isLeft) return leftBinder.apply(leftVal); - - return new Either<>(null, rightVal); - } - - @Override - public IPair bindRight( - final Function> rightBinder) { - if(rightBinder == null) throw new NullPointerException("Right binder must not be null"); - - if(isLeft) return new Either<>(leftVal, null); - - return rightBinder.apply(rightVal); - } - - @Override - public IPair combine( - final IPair otherPair, - final BiFunction leftCombiner, - final BiFunction rightCombiner) { - if(otherPair == null) { - throw new NullPointerException("Other pair must not be null"); - } else if(leftCombiner == null) { - throw new NullPointerException("Left combiner must not be null"); - } else if(rightCombiner == null) { - throw new NullPointerException("Right combiner must not be null"); - } - - if(isLeft) { - return otherPair.bind((otherLeft, otherRight) -> { - CombinedLeft cLeft = leftCombiner.apply(leftVal, otherLeft); - - return new Either<>(cLeft, null); - }); - } - - return otherPair.bind((otherLeft, otherRight) -> { - CombinedRight cRight = rightCombiner.apply(rightVal, otherRight); - - return new Either<>(null, cRight); - }); - } - - @Override - public IPair mapLeft(final Function mapper) { - if(mapper == null) throw new NullPointerException("Mapper must not be null"); - - if(isLeft) return new Either<>(mapper.apply(leftVal), null); - - return new Either<>(null, rightVal); - } - - @Override - public IPair mapRight(final Function mapper) { - if(mapper == null) throw new NullPointerException("Mapper must not be null"); - - if(isLeft) return new Either<>(leftVal, null); - - return new Either<>(null, mapper.apply(rightVal)); - } - - @Override - public MergedType merge(final BiFunction merger) { - if(merger == null) throw new NullPointerException("Merger must not be null"); - - return merger.apply(leftVal, rightVal); - } - - @Override - public int hashCode() { - final int prime = 31; - - int result = 1; - result = prime * result + (isLeft ? 1231 : 1237); - result = prime * result + (leftVal == null ? 0 : leftVal.hashCode()); - result = prime * result + (rightVal == null ? 0 : rightVal.hashCode()); - - return result; - } - - @Override - public boolean equals(final Object obj) { - if(this == obj) return true; - if(obj == null) return false; - if(!(obj instanceof Either)) return false; - - final Either other = (Either) obj; - - if(isLeft != other.isLeft) return false; - - if(leftVal == null) { - if(other.leftVal != null) return false; - } else if(!leftVal.equals(other.leftVal)) return false; - - if(rightVal == null) { - if(other.rightVal != null) return false; - } else if(!rightVal.equals(other.rightVal)) return false; - - return true; - } - - @Override - public String toString() { - return String.format("Either [leftVal='%s', rightVal='%s', isLeft=%s]", leftVal, rightVal, isLeft); - } -} -- cgit v1.2.3