diff options
| author | bculkin2442 <bjculkin@mix.wvu.edu> | 2016-04-17 15:01:44 -0400 |
|---|---|---|
| committer | bculkin2442 <bjculkin@mix.wvu.edu> | 2016-04-17 15:01:44 -0400 |
| commit | 77fcc58d1facffbc3af50be8c05985350e9f1355 (patch) | |
| tree | b7b81d24c107e644924dc526f8bb034efc62d2dc /BJC-Utils2/src/main/java/bjc/utils/data | |
| parent | a5850915df72f5968fd1b281eb9e455d50c580ee (diff) | |
Code maintenace and changes
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java | 99 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/BoundLazyPair.java | 104 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/HalfBoundLazyPair.java | 93 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/IHolder.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/IHolder.java) | 2 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/IPair.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/IPair.java) | 2 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/Identity.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/Identity.java) | 2 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/Lazy.java) | 94 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/LazyPair.java | 134 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/Pair.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/Pair.java) | 2 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/experimental/LazyPair.java | 317 | ||||
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/package-info.java (renamed from BJC-Utils2/src/main/java/bjc/utils/data/experimental/package-info.java) | 2 |
11 files changed, 436 insertions, 415 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java b/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java new file mode 100644 index 0000000..dda65a7 --- /dev/null +++ b/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazy.java @@ -0,0 +1,99 @@ +package bjc.utils.data; + +import java.util.function.Function; +import java.util.function.Supplier; +import java.util.function.UnaryOperator; + +import bjc.utils.funcdata.FunctionalList; +import bjc.utils.funcdata.IFunctionalList; + +class BoundLazy<OldType, BoundContainedType> + implements IHolder<BoundContainedType> { + private Supplier<IHolder<OldType>> oldSupplier; + + private Function<OldType, IHolder<BoundContainedType>> binder; + + private IHolder<BoundContainedType> boundHolder; + + private boolean holderBound; + + private IFunctionalList<UnaryOperator<BoundContainedType>> actions = new FunctionalList<>(); + + public BoundLazy(Supplier<IHolder<OldType>> supp, + Function<OldType, IHolder<BoundContainedType>> binder) { + oldSupplier = supp; + this.binder = binder; + } + + @Override + public <BoundType> IHolder<BoundType> bind( + Function<BoundContainedType, IHolder<BoundType>> bindr) { + IFunctionalList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>(); + + actions.forEach(pendingActions::add); + + Supplier<IHolder<BoundContainedType>> typeSupplier = () -> { + IHolder<BoundContainedType> oldHolder = boundHolder; + + if (!holderBound) { + oldHolder = oldSupplier.get().unwrap(binder); + } + + return pendingActions.reduceAux(oldHolder, (action, state) -> { + return state.transform(action); + }, (value) -> value); + }; + + return new BoundLazy<>(typeSupplier, bindr); + } + + @Override + public <MappedType> IHolder<MappedType> map( + Function<BoundContainedType, MappedType> mapper) { + IFunctionalList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>(); + + actions.forEach(pendingActions::add); + + Supplier<MappedType> typeSupplier = () -> { + IHolder<BoundContainedType> oldHolder = boundHolder; + + if (!holderBound) { + oldHolder = oldSupplier.get().unwrap(binder); + } + + return pendingActions.reduceAux(oldHolder.getValue(), + (action, state) -> { + return action.apply(state); + }, (value) -> mapper.apply(value)); + }; + + return new Lazy<>(typeSupplier); + } + + @Override + public IHolder<BoundContainedType> transform( + UnaryOperator<BoundContainedType> transformer) { + actions.add(transformer); + + return this; + } + + @Override + public <UnwrappedType> UnwrappedType unwrap( + Function<BoundContainedType, UnwrappedType> unwrapper) { + if (!holderBound) { + boundHolder = oldSupplier.get().unwrap(binder::apply); + } + + return boundHolder.unwrap(unwrapper); + } + + @Override + public String toString() { + if (holderBound) { + return boundHolder.toString(); + } + + return "(unmaterialized)"; + } +}
\ No newline at end of file diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazyPair.java new file mode 100644 index 0000000..41ab99b --- /dev/null +++ b/BJC-Utils2/src/main/java/bjc/utils/data/BoundLazyPair.java @@ -0,0 +1,104 @@ +package bjc.utils.data; + +import java.util.function.BiFunction; +import java.util.function.Function; +import java.util.function.Supplier; + +class BoundLazyPair<OldLeft, OldRight, NewLeft, NewRight> + implements IPair<NewLeft, NewRight> { + private Supplier<OldLeft> leftSupplier; + private Supplier<OldRight> rightSupplier; + + private BiFunction<OldLeft, OldRight, IPair<NewLeft, NewRight>> binder; + + private IPair<NewLeft, NewRight> boundPair; + + private boolean pairBound; + + public BoundLazyPair(Supplier<OldLeft> leftSupp, + Supplier<OldRight> rightSupp, + BiFunction<OldLeft, OldRight, IPair<NewLeft, NewRight>> bindr) { + leftSupplier = leftSupp; + rightSupplier = rightSupp; + binder = bindr; + } + + @Override + public <BoundLeft> IPair<BoundLeft, NewRight> bindLeft( + Function<NewLeft, IPair<BoundLeft, NewRight>> leftBinder) { + Supplier<NewLeft> leftSupp = () -> { + IPair<NewLeft, NewRight> newPair = boundPair; + + if (!pairBound) { + newPair = binder.apply(leftSupplier.get(), + rightSupplier.get()); + } + + return newPair.getLeft(); + }; + + return new HalfBoundLazyPair<>(leftSupp, leftBinder); + } + + @Override + public <BoundRight> IPair<NewLeft, BoundRight> bindRight( + Function<NewRight, IPair<NewLeft, BoundRight>> rightBinder) { + Supplier<NewRight> rightSupp = () -> { + IPair<NewLeft, NewRight> newPair = boundPair; + + if (!pairBound) { + newPair = binder.apply(leftSupplier.get(), + rightSupplier.get()); + } + + return newPair.getRight(); + }; + + return new HalfBoundLazyPair<>(rightSupp, rightBinder); + } + + @Override + public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( + BiFunction<NewLeft, NewRight, IPair<BoundLeft, BoundRight>> bindr) { + IHolder<IPair<NewLeft, NewRight>> newPair = new Identity<>( + boundPair); + IHolder<Boolean> newPairMade = new Identity<>(pairBound); + + Supplier<NewLeft> leftSupp = () -> { + if (!newPairMade.getValue()) { + newPair.replace(binder.apply(leftSupplier.get(), + rightSupplier.get())); + + newPairMade.replace(false); + } + + return newPair.unwrap((pair) -> pair.getLeft()); + }; + + Supplier<NewRight> rightSupp = () -> { + if (!newPairMade.getValue()) { + newPair.replace(binder.apply(leftSupplier.get(), + rightSupplier.get())); + + newPairMade.replace(false); + } + + return newPair.unwrap((pair) -> pair.getRight()); + }; + + return new BoundLazyPair<>(leftSupp, rightSupp, bindr); + } + + @Override + public <MergedType> MergedType merge( + BiFunction<NewLeft, NewRight, MergedType> merger) { + if (!pairBound) { + boundPair = binder.apply(leftSupplier.get(), + rightSupplier.get()); + + pairBound = true; + } + + return boundPair.merge(merger); + } +}
\ No newline at end of file diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/HalfBoundLazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/HalfBoundLazyPair.java new file mode 100644 index 0000000..f32f58f --- /dev/null +++ b/BJC-Utils2/src/main/java/bjc/utils/data/HalfBoundLazyPair.java @@ -0,0 +1,93 @@ +package bjc.utils.data; + +import java.util.function.BiFunction; +import java.util.function.Function; +import java.util.function.Supplier; + +class HalfBoundLazyPair<OldType, NewLeft, NewRight> + implements IPair<NewLeft, NewRight> { + private Supplier<OldType> oldSupplier; + + private Function<OldType, IPair<NewLeft, NewRight>> binder; + + private IPair<NewLeft, NewRight> boundPair; + private boolean pairBound; + + public HalfBoundLazyPair(Supplier<OldType> oldSupp, + Function<OldType, IPair<NewLeft, NewRight>> bindr) { + oldSupplier = oldSupp; + binder = bindr; + } + + @Override + public <BoundLeft> IPair<BoundLeft, NewRight> bindLeft( + Function<NewLeft, IPair<BoundLeft, NewRight>> leftBinder) { + Supplier<NewLeft> leftSupp = () -> { + IPair<NewLeft, NewRight> newPair = boundPair; + + if (!pairBound) { + newPair = binder.apply(oldSupplier.get()); + } + + return newPair.getLeft(); + }; + + return new HalfBoundLazyPair<>(leftSupp, leftBinder); + } + + @Override + public <BoundRight> IPair<NewLeft, BoundRight> bindRight( + Function<NewRight, IPair<NewLeft, BoundRight>> rightBinder) { + Supplier<NewRight> rightSupp = () -> { + IPair<NewLeft, NewRight> newPair = boundPair; + + if (!pairBound) { + newPair = binder.apply(oldSupplier.get()); + } + + return newPair.getRight(); + }; + + return new HalfBoundLazyPair<>(rightSupp, rightBinder); + } + + @Override + public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( + BiFunction<NewLeft, NewRight, IPair<BoundLeft, BoundRight>> bindr) { + IHolder<IPair<NewLeft, NewRight>> newPair = new Identity<>( + boundPair); + IHolder<Boolean> newPairMade = new Identity<>(pairBound); + + Supplier<NewLeft> leftSupp = () -> { + if (!newPairMade.getValue()) { + newPair.replace(binder.apply(oldSupplier.get())); + newPairMade.replace(true); + } + + return newPair.unwrap((pair) -> pair.getLeft()); + }; + + Supplier<NewRight> rightSupp = () -> { + if (!newPairMade.getValue()) { + newPair.replace(binder.apply(oldSupplier.get())); + newPairMade.replace(true); + } + + return newPair.unwrap((pair) -> pair.getRight()); + }; + + return new BoundLazyPair<>(leftSupp, rightSupp, bindr); + } + + @Override + public <MergedType> MergedType merge( + BiFunction<NewLeft, NewRight, MergedType> merger) { + if (!pairBound) { + boundPair = binder.apply(oldSupplier.get()); + + pairBound = true; + } + + return boundPair.merge(merger); + } +}
\ No newline at end of file diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/IHolder.java b/BJC-Utils2/src/main/java/bjc/utils/data/IHolder.java index 6ccf115..77eb899 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/IHolder.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/IHolder.java @@ -1,4 +1,4 @@ -package bjc.utils.data.experimental; +package bjc.utils.data; import java.util.function.Consumer; import java.util.function.Function; diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/IPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/IPair.java index f5ca240..3d4998c 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/IPair.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/IPair.java @@ -1,4 +1,4 @@ -package bjc.utils.data.experimental; +package bjc.utils.data; import java.util.function.BiConsumer; import java.util.function.BiFunction; diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Identity.java b/BJC-Utils2/src/main/java/bjc/utils/data/Identity.java index 1780f2d..dcc7bef 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Identity.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/Identity.java @@ -1,4 +1,4 @@ -package bjc.utils.data.experimental; +package bjc.utils.data; import java.util.function.Function; import java.util.function.UnaryOperator; diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Lazy.java b/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java index 0d6fcef..f4bc24a 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Lazy.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java @@ -1,4 +1,4 @@ -package bjc.utils.data.experimental; +package bjc.utils.data; import java.util.function.Function; import java.util.function.Supplier; @@ -16,98 +16,6 @@ import bjc.utils.funcdata.IFunctionalList; * @param <ContainedType> */ public class Lazy<ContainedType> implements IHolder<ContainedType> { - private static class BoundLazy<OldType, BoundContainedType> - implements IHolder<BoundContainedType> { - private Supplier<IHolder<OldType>> oldSupplier; - - private Function<OldType, IHolder<BoundContainedType>> binder; - - private IHolder<BoundContainedType> boundHolder; - - private boolean holderBound; - - private IFunctionalList<UnaryOperator<BoundContainedType>> actions = new FunctionalList<>(); - - public BoundLazy(Supplier<IHolder<OldType>> supp, - Function<OldType, IHolder<BoundContainedType>> binder) { - oldSupplier = supp; - this.binder = binder; - } - - @Override - public <BoundType> IHolder<BoundType> bind( - Function<BoundContainedType, IHolder<BoundType>> bindr) { - IFunctionalList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>(); - - actions.forEach(pendingActions::add); - - Supplier<IHolder<BoundContainedType>> typeSupplier = () -> { - IHolder<BoundContainedType> oldHolder = boundHolder; - - if (!holderBound) { - oldHolder = oldSupplier.get().unwrap(binder); - } - - return pendingActions.reduceAux(oldHolder, - (action, state) -> { - return state.transform(action); - }, (value) -> value); - }; - - return new BoundLazy<>(typeSupplier, bindr); - } - - @Override - public <MappedType> IHolder<MappedType> map( - Function<BoundContainedType, MappedType> mapper) { - IFunctionalList<UnaryOperator<BoundContainedType>> pendingActions = new FunctionalList<>(); - - actions.forEach(pendingActions::add); - - Supplier<MappedType> typeSupplier = () -> { - IHolder<BoundContainedType> oldHolder = boundHolder; - - if (!holderBound) { - oldHolder = oldSupplier.get().unwrap(binder); - } - - return pendingActions.reduceAux(oldHolder.getValue(), - (action, state) -> { - return action.apply(state); - }, (value) -> mapper.apply(value)); - }; - - return new Lazy<>(typeSupplier); - } - - @Override - public IHolder<BoundContainedType> transform( - UnaryOperator<BoundContainedType> transformer) { - actions.add(transformer); - - return this; - } - - @Override - public <UnwrappedType> UnwrappedType unwrap( - Function<BoundContainedType, UnwrappedType> unwrapper) { - if (!holderBound) { - boundHolder = oldSupplier.get().unwrap(binder::apply); - } - - return boundHolder.unwrap(unwrapper); - } - - @Override - public String toString() { - if (holderBound) { - return boundHolder.toString(); - } - - return "(unmaterialized)"; - } - } - private Supplier<ContainedType> valueSupplier; private IFunctionalList<UnaryOperator<ContainedType>> actions = new FunctionalList<>(); diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/LazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/LazyPair.java new file mode 100644 index 0000000..fd432c1 --- /dev/null +++ b/BJC-Utils2/src/main/java/bjc/utils/data/LazyPair.java @@ -0,0 +1,134 @@ +package bjc.utils.data; + +import java.util.function.BiFunction; +import java.util.function.Function; +import java.util.function.Supplier; + +/** + * A lazy implementation of a pair + * + * @author ben + * + * @param <LeftType> + * The type on the left side of the pair + * @param <RightType> + * The type on the right side of the pair + */ +public class LazyPair<LeftType, RightType> + implements IPair<LeftType, RightType> { + private LeftType leftValue; + private RightType rightValue; + + private Supplier<LeftType> leftSupplier; + private Supplier<RightType> rightSupplier; + + private boolean leftMaterialized; + private boolean rightMaterialized; + + /** + * Create a new lazy pair, using the set value s + * + * @param leftVal + * The value for the left side of the pair + * @param rightVal + * The value for the right side of the pair + */ + public LazyPair(LeftType leftVal, RightType rightVal) { + leftValue = leftVal; + rightValue = rightVal; + + leftMaterialized = true; + rightMaterialized = true; + } + + /** + * Create a new lazy pair from the given value sources + * + * @param leftSupp + * The source for a value on the left side of the pair + * @param rightSupp + * The source for a value on the right side of the pair + */ + public LazyPair(Supplier<LeftType> leftSupp, + Supplier<RightType> rightSupp) { + leftSupplier = leftSupp; + rightSupplier = rightSupp; + + leftMaterialized = false; + rightMaterialized = false; + } + + @Override + public <BoundLeft> IPair<BoundLeft, RightType> bindLeft( + Function<LeftType, IPair<BoundLeft, RightType>> leftBinder) { + Supplier<LeftType> leftSupp = () -> { + if (leftMaterialized) { + return leftValue; + } + + return leftSupplier.get(); + }; + + return new HalfBoundLazyPair<>(leftSupp, leftBinder); + } + + @Override + public <BoundRight> IPair<LeftType, BoundRight> bindRight( + Function<RightType, IPair<LeftType, BoundRight>> rightBinder) { + Supplier<RightType> rightSupp = () -> { + if (rightMaterialized) { + return rightValue; + } + + return rightSupplier.get(); + }; + + return new HalfBoundLazyPair<>(rightSupp, rightBinder); + } + + @Override + public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( + BiFunction<LeftType, RightType, IPair<BoundLeft, BoundRight>> binder) { + return new BoundLazyPair<>(leftSupplier, rightSupplier, binder); + } + + @Override + public <MergedType> MergedType merge( + BiFunction<LeftType, RightType, MergedType> merger) { + if (!leftMaterialized) { + leftValue = leftSupplier.get(); + + leftMaterialized = true; + } + + if (!rightMaterialized) { + rightValue = rightSupplier.get(); + + rightMaterialized = true; + } + + return merger.apply(leftValue, rightValue); + } + + @Override + public LeftType getLeft() { + if (!leftMaterialized) { + leftValue = leftSupplier.get(); + + leftMaterialized = true; + } + + return leftValue; + } + + @Override + public RightType getRight() { + if (!rightMaterialized) { + rightValue = rightSupplier.get(); + + rightMaterialized = true; + } + + return rightValue; + } +} diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Pair.java b/BJC-Utils2/src/main/java/bjc/utils/data/Pair.java index 87378d7..958df40 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/Pair.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/Pair.java @@ -1,4 +1,4 @@ -package bjc.utils.data.experimental; +package bjc.utils.data; import java.util.function.BiFunction; import java.util.function.Function; diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/LazyPair.java b/BJC-Utils2/src/main/java/bjc/utils/data/experimental/LazyPair.java deleted file mode 100644 index 04a4b61..0000000 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/LazyPair.java +++ /dev/null @@ -1,317 +0,0 @@ -package bjc.utils.data.experimental; - -import java.util.function.BiFunction; -import java.util.function.Function; -import java.util.function.Supplier; - -/** - * A lazy implementation of a pair - * - * @author ben - * - * @param <LeftType> - * The type on the left side of the pair - * @param <RightType> - * The type on the right side of the pair - */ -public class LazyPair<LeftType, RightType> - implements IPair<LeftType, RightType> { - private static class HalfBoundLazyPair<OldType, NewLeft, NewRight> - implements IPair<NewLeft, NewRight> { - private Supplier<OldType> oldSupplier; - - private Function<OldType, IPair<NewLeft, NewRight>> binder; - - private IPair<NewLeft, NewRight> boundPair; - private boolean pairBound; - - public HalfBoundLazyPair(Supplier<OldType> oldSupp, - Function<OldType, IPair<NewLeft, NewRight>> bindr) { - oldSupplier = oldSupp; - binder = bindr; - } - - @Override - public <BoundLeft> IPair<BoundLeft, NewRight> bindLeft( - Function<NewLeft, IPair<BoundLeft, NewRight>> leftBinder) { - Supplier<NewLeft> leftSupp = () -> { - IPair<NewLeft, NewRight> newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(oldSupplier.get()); - } - - return newPair.getLeft(); - }; - - return new HalfBoundLazyPair<>(leftSupp, leftBinder); - } - - @Override - public <BoundRight> IPair<NewLeft, BoundRight> bindRight( - Function<NewRight, IPair<NewLeft, BoundRight>> rightBinder) { - Supplier<NewRight> rightSupp = () -> { - IPair<NewLeft, NewRight> newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(oldSupplier.get()); - } - - return newPair.getRight(); - }; - - return new HalfBoundLazyPair<>(rightSupp, rightBinder); - } - - @Override - public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( - BiFunction<NewLeft, NewRight, IPair<BoundLeft, BoundRight>> bindr) { - IHolder<IPair<NewLeft, NewRight>> newPair = new Identity<>( - boundPair); - IHolder<Boolean> newPairMade = new Identity<>(pairBound); - - Supplier<NewLeft> leftSupp = () -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(oldSupplier.get())); - newPairMade.replace(true); - } - - return newPair.unwrap((pair) -> pair.getLeft()); - }; - - Supplier<NewRight> rightSupp = () -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(oldSupplier.get())); - newPairMade.replace(true); - } - - return newPair.unwrap((pair) -> pair.getRight()); - }; - - return new BoundLazyPair<>(leftSupp, rightSupp, bindr); - } - - @Override - public <MergedType> MergedType merge( - BiFunction<NewLeft, NewRight, MergedType> merger) { - if (!pairBound) { - boundPair = binder.apply(oldSupplier.get()); - - pairBound = true; - } - - return boundPair.merge(merger); - } - } - - private static class BoundLazyPair<OldLeft, OldRight, NewLeft, NewRight> - implements IPair<NewLeft, NewRight> { - private Supplier<OldLeft> leftSupplier; - private Supplier<OldRight> rightSupplier; - - private BiFunction<OldLeft, OldRight, IPair<NewLeft, NewRight>> binder; - - private IPair<NewLeft, NewRight> boundPair; - - private boolean pairBound; - - public BoundLazyPair(Supplier<OldLeft> leftSupp, - Supplier<OldRight> rightSupp, - BiFunction<OldLeft, OldRight, IPair<NewLeft, NewRight>> bindr) { - leftSupplier = leftSupp; - rightSupplier = rightSupp; - binder = bindr; - } - - @Override - public <BoundLeft> IPair<BoundLeft, NewRight> bindLeft( - Function<NewLeft, IPair<BoundLeft, NewRight>> leftBinder) { - Supplier<NewLeft> leftSupp = () -> { - IPair<NewLeft, NewRight> newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(leftSupplier.get(), - rightSupplier.get()); - } - - return newPair.getLeft(); - }; - - return new HalfBoundLazyPair<>(leftSupp, leftBinder); - } - - @Override - public <BoundRight> IPair<NewLeft, BoundRight> bindRight( - Function<NewRight, IPair<NewLeft, BoundRight>> rightBinder) { - Supplier<NewRight> rightSupp = () -> { - IPair<NewLeft, NewRight> newPair = boundPair; - - if (!pairBound) { - newPair = binder.apply(leftSupplier.get(), - rightSupplier.get()); - } - - return newPair.getRight(); - }; - - return new HalfBoundLazyPair<>(rightSupp, rightBinder); - } - - @Override - public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( - BiFunction<NewLeft, NewRight, IPair<BoundLeft, BoundRight>> bindr) { - IHolder<IPair<NewLeft, NewRight>> newPair = new Identity<>( - boundPair); - IHolder<Boolean> newPairMade = new Identity<>(pairBound); - - return new BoundLazyPair<>(() -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(leftSupplier.get(), - rightSupplier.get())); - - newPairMade.replace(false); - } - - return newPair.unwrap((pair) -> pair.getLeft()); - }, () -> { - if (!newPairMade.getValue()) { - newPair.replace(binder.apply(leftSupplier.get(), - rightSupplier.get())); - - newPairMade.replace(false); - } - - return newPair.unwrap((pair) -> pair.getRight()); - }, bindr); - } - - @Override - public <MergedType> MergedType merge( - BiFunction<NewLeft, NewRight, MergedType> merger) { - if (!pairBound) { - boundPair = binder.apply(leftSupplier.get(), - rightSupplier.get()); - - pairBound = true; - } - - return boundPair.merge(merger); - } - } - - private LeftType leftValue; - private RightType rightValue; - - private Supplier<LeftType> leftSupplier; - private Supplier<RightType> rightSupplier; - - private boolean leftMaterialized; - private boolean rightMaterialized; - - /** - * Create a new lazy pair, using the set value s - * - * @param leftVal - * The value for the left side of the pair - * @param rightVal - * The value for the right side of the pair - */ - public LazyPair(LeftType leftVal, RightType rightVal) { - leftValue = leftVal; - rightValue = rightVal; - - leftMaterialized = true; - rightMaterialized = true; - } - - /** - * Create a new lazy pair from the given value sources - * - * @param leftSupp - * The source for a value on the left side of the pair - * @param rightSupp - * The source for a value on the right side of the pair - */ - public LazyPair(Supplier<LeftType> leftSupp, - Supplier<RightType> rightSupp) { - leftSupplier = leftSupp; - rightSupplier = rightSupp; - - leftMaterialized = false; - rightMaterialized = false; - } - - @Override - public <BoundLeft> IPair<BoundLeft, RightType> bindLeft( - Function<LeftType, IPair<BoundLeft, RightType>> leftBinder) { - Supplier<LeftType> leftSupp = () -> { - if (leftMaterialized) { - return leftValue; - } - - return leftSupplier.get(); - }; - - return new HalfBoundLazyPair<>(leftSupp, leftBinder); - } - - @Override - public <BoundRight> IPair<LeftType, BoundRight> bindRight( - Function<RightType, IPair<LeftType, BoundRight>> rightBinder) { - Supplier<RightType> rightSupp = () -> { - if (rightMaterialized) { - return rightValue; - } - - return rightSupplier.get(); - }; - - return new HalfBoundLazyPair<>(rightSupp, rightBinder); - } - - @Override - public <BoundLeft, BoundRight> IPair<BoundLeft, BoundRight> bind( - BiFunction<LeftType, RightType, IPair<BoundLeft, BoundRight>> binder) { - return new BoundLazyPair<>(leftSupplier, rightSupplier, binder); - } - - @Override - public <MergedType> MergedType merge( - BiFunction<LeftType, RightType, MergedType> merger) { - if (!leftMaterialized) { - leftValue = leftSupplier.get(); - - leftMaterialized = true; - } - - if (!rightMaterialized) { - rightValue = rightSupplier.get(); - - rightMaterialized = true; - } - - return merger.apply(leftValue, rightValue); - } - - @Override - public LeftType getLeft() { - if (!leftMaterialized) { - leftValue = leftSupplier.get(); - - leftMaterialized = true; - } - - return leftValue; - } - - @Override - public RightType getRight() { - if (!rightMaterialized) { - rightValue = rightSupplier.get(); - - rightMaterialized = true; - } - - return rightValue; - } -} diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/package-info.java b/BJC-Utils2/src/main/java/bjc/utils/data/package-info.java index 72e1007..a6f05dd 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/experimental/package-info.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/package-info.java @@ -4,4 +4,4 @@ * @author ben * */ -package bjc.utils.data.experimental;
\ No newline at end of file +package bjc.utils.data;
\ No newline at end of file |
