From c82e3b3b2de0633317ec8fc85925e91422820597 Mon Sep 17 00:00:00 2001 From: "Benjamin J. Culkin" Date: Sun, 8 Oct 2017 22:39:59 -0300 Subject: Start splitting into maven modules --- .../bjc/utils/data/internals/BoundLazyPair.java | 199 --------------------- 1 file changed, 199 deletions(-) delete mode 100644 BJC-Utils2/src/main/java/bjc/utils/data/internals/BoundLazyPair.java (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/internals/BoundLazyPair.java') diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/internals/BoundLazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/internals/BoundLazyPair.java deleted file mode 100644 index df6e60b..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/data/internals/BoundLazyPair.java +++ /dev/null @@ -1,199 +0,0 @@ -package bjc.utils.data.internals; - -import java.util.function.BiFunction; -import java.util.function.Function; -import java.util.function.Supplier; - -import bjc.utils.data.IHolder; -import bjc.utils.data.IPair; -import bjc.utils.data.Identity; -import bjc.utils.data.LazyPair; - -/* - * Implements a lazy pair that has been bound - */ -public class BoundLazyPair implements IPair { - /* - * The supplier of the left value - */ - private final Supplier leftSupplier; - /* - * The supplier of the right value - */ - private final Supplier rightSupplier; - - /* - * The binder to transform values - */ - private final BiFunction> binder; - - /* - * The bound pair - */ - private IPair boundPair; - - /* - * Whether the pair has been bound yet - */ - private boolean pairBound; - - public BoundLazyPair(final Supplier leftSupp, final Supplier rightSupp, - final BiFunction> bindr) { - leftSupplier = leftSupp; - rightSupplier = rightSupp; - binder = bindr; - } - - @Override - public IPair bind( - final BiFunction> bindr) { - if (bindr == null) throw new NullPointerException("Binder must not be null"); - - final IHolder> newPair = new Identity<>(boundPair); - final IHolder newPairMade = new Identity<>(pairBound); - - final Supplier leftSupp = () -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(leftSupplier.get(), rightSupplier.get())); - - newPairMade.replace(true); - } - - return newPair.unwrap((pair) -> pair.getLeft()); - }; - - final Supplier rightSupp = () -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(leftSupplier.get(), rightSupplier.get())); - - newPairMade.replace(true); - } - - return newPair.unwrap((pair) -> pair.getRight()); - }; - - return new BoundLazyPair<>(leftSupp, rightSupp, bindr); - } - - @Override - public IPair bindLeft( - final Function> leftBinder) { - if (leftBinder == null) throw new NullPointerException("Left binder must not be null"); - - final Supplier leftSupp = () -> { - IPair newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(leftSupplier.get(), rightSupplier.get()); - } - - return newPair.getLeft(); - }; - - return new HalfBoundLazyPair<>(leftSupp, leftBinder); - } - - @Override - public IPair bindRight( - final Function> rightBinder) { - if (rightBinder == null) throw new NullPointerException("Right binder must not be null"); - - final Supplier rightSupp = () -> { - IPair newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(leftSupplier.get(), rightSupplier.get()); - } - - return newPair.getRight(); - }; - - return new HalfBoundLazyPair<>(rightSupp, rightBinder); - } - - @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"); - - return otherPair.bind((otherLeft, otherRight) -> { - return bind((leftVal, rightVal) -> { - return new LazyPair<>(leftCombiner.apply(leftVal, otherLeft), - rightCombiner.apply(rightVal, otherRight)); - }); - }); - } - - @Override - public IPair mapLeft(final Function mapper) { - if (mapper == null) throw new NullPointerException("Mapper must not be null"); - - final Supplier leftSupp = () -> { - if (!pairBound) { - final NewLeft leftVal = binder.apply(leftSupplier.get(), rightSupplier.get()).getLeft(); - - return mapper.apply(leftVal); - } - - return mapper.apply(boundPair.getLeft()); - }; - - final Supplier rightSupp = () -> { - if (!pairBound) return binder.apply(leftSupplier.get(), rightSupplier.get()).getRight(); - - return boundPair.getRight(); - }; - - return new LazyPair<>(leftSupp, rightSupp); - } - - @Override - public IPair mapRight(final Function mapper) { - if (mapper == null) throw new NullPointerException("Mapper must not be null"); - - final Supplier leftSupp = () -> { - if (!pairBound) return binder.apply(leftSupplier.get(), rightSupplier.get()).getLeft(); - - return boundPair.getLeft(); - }; - - final Supplier rightSupp = () -> { - if (!pairBound) { - final NewRight rightVal = binder.apply(leftSupplier.get(), rightSupplier.get()) - .getRight(); - - return mapper.apply(rightVal); - } - - return mapper.apply(boundPair.getRight()); - }; - - return new LazyPair<>(leftSupp, rightSupp); - } - - @Override - public MergedType merge(final BiFunction merger) { - if (merger == null) throw new NullPointerException("Merger must not be null"); - - if (!pairBound) { - boundPair = binder.apply(leftSupplier.get(), rightSupplier.get()); - - pairBound = true; - } - - return boundPair.merge(merger); - } - - @Override - public String toString() { - if (pairBound) return boundPair.toString(); - - return "(un-materialized)"; - } -} \ No newline at end of file -- cgit v1.2.3