diff options
| author | bculkin2442 <bjculkin@mix.wvu.edu> | 2017-04-10 16:40:33 -0400 |
|---|---|---|
| committer | bculkin2442 <bjculkin@mix.wvu.edu> | 2017-04-10 16:40:33 -0400 |
| commit | 889fac2bdf993dc86f64a8893c0260fdcf848acb (patch) | |
| tree | 99ed08552efa86fdc5fdf4ddb8720d10e599fafe /BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java | |
| parent | 1656b02144446aeedebb3d1179e07ed99c01861c (diff) | |
Cleanup
Diffstat (limited to 'BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java')
| -rw-r--r-- | BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java | 84 |
1 files changed, 36 insertions, 48 deletions
diff --git a/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java b/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java index 719b11f..ca41b62 100644 --- a/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java +++ b/BJC-Utils2/src/main/java/bjc/utils/data/Lazy.java @@ -1,13 +1,13 @@ package bjc.utils.data; -import bjc.utils.data.internals.BoundLazy; -import bjc.utils.funcdata.FunctionalList; -import bjc.utils.funcdata.IList; - import java.util.function.Function; import java.util.function.Supplier; import java.util.function.UnaryOperator; +import bjc.utils.data.internals.BoundLazy; +import bjc.utils.funcdata.FunctionalList; +import bjc.utils.funcdata.IList; + /** * A holder that holds a means to create a value, but doesn't actually compute * the value until it's needed @@ -31,7 +31,7 @@ public class Lazy<ContainedType> implements IHolder<ContainedType> { * @param value * The seed value to use */ - public Lazy(ContainedType value) { + public Lazy(final ContainedType value) { heldValue = value; valueMaterialized = true; @@ -43,27 +43,26 @@ public class Lazy<ContainedType> implements IHolder<ContainedType> { * @param supp * The source of a value to use */ - public Lazy(Supplier<ContainedType> supp) { + public Lazy(final Supplier<ContainedType> supp) { valueSupplier = new SingleSupplier<>(supp); valueMaterialized = false; } - private Lazy(Supplier<ContainedType> supp, IList<UnaryOperator<ContainedType>> pendingActions) { + private Lazy(final Supplier<ContainedType> supp, final IList<UnaryOperator<ContainedType>> pendingActions) { valueSupplier = supp; actions = pendingActions; } @Override - public <BoundType> IHolder<BoundType> bind(Function<ContainedType, IHolder<BoundType>> binder) { - IList<UnaryOperator<ContainedType>> pendingActions = new FunctionalList<>(); + public <BoundType> IHolder<BoundType> bind(final Function<ContainedType, IHolder<BoundType>> binder) { + final IList<UnaryOperator<ContainedType>> pendingActions = new FunctionalList<>(); actions.forEach(pendingActions::add); - Supplier<ContainedType> supplier = () -> { - if (valueMaterialized) - return heldValue; + final Supplier<ContainedType> supplier = () -> { + if (valueMaterialized) return heldValue; return valueSupplier.get(); }; @@ -74,15 +73,15 @@ public class Lazy<ContainedType> implements IHolder<ContainedType> { } @Override - public <NewType> Function<ContainedType, IHolder<NewType>> lift(Function<ContainedType, NewType> func) { + public <NewType> Function<ContainedType, IHolder<NewType>> lift(final Function<ContainedType, NewType> func) { return val -> { return new Lazy<>(func.apply(val)); }; } @Override - public <MappedType> IHolder<MappedType> map(Function<ContainedType, MappedType> mapper) { - IList<UnaryOperator<ContainedType>> pendingActions = new FunctionalList<>(); + public <MappedType> IHolder<MappedType> map(final Function<ContainedType, MappedType> mapper) { + final IList<UnaryOperator<ContainedType>> pendingActions = new FunctionalList<>(); actions.forEach(pendingActions::add); @@ -103,22 +102,21 @@ public class Lazy<ContainedType> implements IHolder<ContainedType> { if (valueMaterialized) { if (actions.isEmpty()) return String.format("value[v='%s']", heldValue); - else - return String.format("value[v='%s'] (has pending transforms)", heldValue); + else return String.format("value[v='%s'] (has pending transforms)", heldValue); } return "(unmaterialized)"; } @Override - public IHolder<ContainedType> transform(UnaryOperator<ContainedType> transformer) { + public IHolder<ContainedType> transform(final UnaryOperator<ContainedType> transformer) { actions.add(transformer); return this; } @Override - public <UnwrappedType> UnwrappedType unwrap(Function<ContainedType, UnwrappedType> unwrapper) { + public <UnwrappedType> UnwrappedType unwrap(final Function<ContainedType, UnwrappedType> unwrapper) { if (!valueMaterialized) { heldValue = valueSupplier.get(); @@ -139,68 +137,58 @@ public class Lazy<ContainedType> implements IHolder<ContainedType> { final int prime = 31; int result = 1; - result = prime * result + ((actions == null) ? 0 : actions.hashCode()); - result = prime * result + ((heldValue == null) ? 0 : heldValue.hashCode()); + result = prime * result + (actions == null ? 0 : actions.hashCode()); + result = prime * result + (heldValue == null ? 0 : heldValue.hashCode()); result = prime * result + (valueMaterialized ? 1231 : 1237); return result; } @Override - public boolean equals(Object obj) { - if (this == obj) - return true; - if (obj == null) - return false; - if (!(obj instanceof Lazy<?>)) - return false; + public boolean equals(final Object obj) { + if (this == obj) return true; + if (obj == null) return false; + if (!(obj instanceof Lazy<?>)) return false; - Lazy<?> other = (Lazy<?>) obj; + final Lazy<?> other = (Lazy<?>) obj; - if (valueMaterialized != other.valueMaterialized) - return false; + if (valueMaterialized != other.valueMaterialized) return false; if (valueMaterialized) { if (heldValue == null) { - if (other.heldValue != null) - return false; - } else if (!heldValue.equals(other.heldValue)) - return false; - } else { - return false; - } + if (other.heldValue != null) return false; + } else if (!heldValue.equals(other.heldValue)) return false; + } else return false; if (actions == null) { - if (other.actions != null) - return false; - } else if (actions.getSize() > 0 || other.actions.getSize() > 0) - return false; + if (other.actions != null) return false; + } else if (actions.getSize() > 0 || other.actions.getSize() > 0) return false; return true; } /** * Create a new lazy container with an already present value. - * + * * @param val * The value for the lazy container. - * + * * @return A new lazy container holding that value. */ - public static <ContainedType> Lazy<ContainedType> lazy(ContainedType val) { + public static <ContainedType> Lazy<ContainedType> lazy(final ContainedType val) { return new Lazy<>(val); } /** * Create a new lazy container with a suspended value. - * + * * @param supp * The suspended value for the lazy container. - * + * * @return A new lazy container that will un-suspend the value when * necessary. */ - public static <ContainedType> Lazy<ContainedType> lazy(Supplier<ContainedType> supp) { + public static <ContainedType> Lazy<ContainedType> lazy(final Supplier<ContainedType> supp) { return new Lazy<>(supp); } } |
